Neurotransmitters and Brain Functions Quiz
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Questions and Answers

What is the primary function of neurotransmitters?

  • To facilitate communication between neurons (correct)
  • To form connections in the brain
  • To provide energy to neurons
  • To create protectiveness around neurons

Which neurotransmitter is known for its inhibitory properties?

  • Glutamate
  • GABA (correct)
  • Acetylcholine
  • Dopamine

What structure within a neuron releases neurotransmitters?

  • Nucleus
  • Dendrites
  • Axon terminal (correct)
  • Cell body

Which process describes the reabsorption of neurotransmitters back into the axon terminal?

<p>Reuptake (D)</p> Signup and view all the answers

What part of the brain is primarily responsible for vital functions such as heart rate and breathing?

<p>Medulla (B)</p> Signup and view all the answers

Which type of neurotransmitter is known for increasing attention and memory?

<p>Acetylcholine (C)</p> Signup and view all the answers

What role does the reticular formation play in brain function?

<p>Sleep-wake cycles (D)</p> Signup and view all the answers

Which neurotransmitter is released to dampen pain responses?

<p>Endorphins (A)</p> Signup and view all the answers

What is the primary function of the temporal lobe?

<p>Understanding language and storing memories (C)</p> Signup and view all the answers

Which division of the autonomic nervous system is activated during a crisis?

<p>Sympathetic division (C)</p> Signup and view all the answers

Which brain mapping method provides information about brain activity but may lack specificity?

<p>Electroencephalograph (EEG) (A)</p> Signup and view all the answers

What does a positron emission tomography (PET) scan measure?

<p>Consumption of radioactive glucose-like molecules (B)</p> Signup and view all the answers

Which brain imaging technique is known for being motion sensitive?

<p>Functional MRI (fMRI) (D)</p> Signup and view all the answers

What is the main function of the retina in the human eye?

<p>To provide color vision and detail recognition (A), To convert light into neural activity (B)</p> Signup and view all the answers

Which principle correctly describes sensation in humans?

<p>Sensory adaptation occurs after initial detection of a stimulus. (A)</p> Signup and view all the answers

What primary aspect does the occipital lobe process?

<p>Vision, including color and motion (A)</p> Signup and view all the answers

What does Weber's law state about detecting stimulus changes?

<p>Stronger stimuli require a greater change to be detected. (A)</p> Signup and view all the answers

What is a key feature of transcranial magnetic stimulation (TMS)?

<p>It can enhance or interrupt brain function. (C)</p> Signup and view all the answers

What is the absolute threshold in psychophysics?

<p>The lowest level of stimulus detectable 50% of the time. (D)</p> Signup and view all the answers

Which neuroimaging technique visualizes brain structure by measuring energy release from hydrogen atoms?

<p>Magnetic resonance imaging (MRI) (B)</p> Signup and view all the answers

What is the primary role of cones in the retina?

<p>To provide color vision and detail. (C)</p> Signup and view all the answers

What is the function of the lens in the human eye?

<p>To fine-tune light focus onto the retina. (D)</p> Signup and view all the answers

Which part of the eye is responsible for the acuity of vision?

<p>The fovea (B)</p> Signup and view all the answers

Which processing model involves perception driven by external stimuli?

<p>Bottom-up processing (D)</p> Signup and view all the answers

What does operant conditioning primarily depend on?

<p>The consequences of the organism's behavior (C)</p> Signup and view all the answers

In Thorndike's law of effect, which scenario is likely to lead to repeated behavior?

<p>A cat gets a food treat after solving a puzzle (A)</p> Signup and view all the answers

What is the primary purpose of negative reinforcement?

<p>To increase the likelihood of a behavior's occurrence by removing an unpleasant stimulus (A)</p> Signup and view all the answers

Which of the following best defines positive punishment?

<p>Adding an unpleasant stimulus to decrease a behavior's occurrence (B)</p> Signup and view all the answers

Stimulus discrimination in conditioning refers to which of the following?

<p>Responding differently to similar stimuli (B)</p> Signup and view all the answers

What is the function of rhodopsin in the eye?

<p>It is a photopigment in rods sensitive to light. (A)</p> Signup and view all the answers

Which type of color mixing produces white light?

<p>Additive mixing (D)</p> Signup and view all the answers

What does the trichromatic theory of color vision propose?

<p>Color vision relies on sensitivity to three primary colors. (D)</p> Signup and view all the answers

Which phenomenon describes the inability to notice a stimulus in plain sight when attention is focused elsewhere?

<p>Inattentional blindness (B)</p> Signup and view all the answers

Which part of the ear is visible and includes skin and cartilage?

<p>Pinna (B)</p> Signup and view all the answers

How does selective attention affect sensory processing?

<p>It allows focusing on specific sensory inputs while others are processed at a lower level. (D)</p> Signup and view all the answers

What type of frequencies can humans typically perceive?

<p>0Hz to 20,000Hz (A)</p> Signup and view all the answers

What is the primary auditory characteristic determined by the amplitude of sound waves?

<p>Loudness (C)</p> Signup and view all the answers

Which theory addresses how the brain organizes sensory information into perceptions?

<p>Binding problem (D)</p> Signup and view all the answers

What is considered a result of the opponent process theory of color vision?

<p>Perception of complementary colors (B)</p> Signup and view all the answers

What is the process of thinking about our own thinking called?

<p>Metacognition (C)</p> Signup and view all the answers

What triggers the process of falling asleep?

<p>Increase in melatonin (C)</p> Signup and view all the answers

Which stage of sleep is characterized by vivid dreams and quick eye movements?

<p>Stage R (REM) (D)</p> Signup and view all the answers

Which brain activity is predominant in Stage 3 (non-REM) sleep?

<p>Delta waves (C)</p> Signup and view all the answers

What is a significant consequence of building up a sleep debt?

<p>Decreased immune functioning (B)</p> Signup and view all the answers

During which stage are sleep spindles and K-complexes primarily observed?

<p>Stage 2 (non-REM) (A)</p> Signup and view all the answers

What effect does alcohol have on Stage 3 (non-REM) sleep?

<p>Suppresses deep sleep (D)</p> Signup and view all the answers

What role does the suprachiasmatic nucleus (SCN) play in the body?

<p>Regulates circadian rhythms (C)</p> Signup and view all the answers

What is the main limitation of cross-sectional design in research?

<p>Cohort effects (D)</p> Signup and view all the answers

What does illusory correlation refer to?

<p>Perception of a statistical association where none exists (D)</p> Signup and view all the answers

What is the purpose of random assignment in experiments?

<p>To eliminate bias in the attribution of participants to groups (D)</p> Signup and view all the answers

What is a primary limitation of longitudinal designs in research?

<p>Attrition, or the dropout of participants over time (A)</p> Signup and view all the answers

Which statement correctly describes the relationship between correlation and causation?

<p>Correlation does not imply causation (B)</p> Signup and view all the answers

What is the primary aim of Structuralism in psychology?

<p>To identify the most fundamental elements of psychological experience (A)</p> Signup and view all the answers

Which theoretical perspective in psychology focuses on observable behaviors and their relationship with environmental stimuli?

<p>Behaviourism (C)</p> Signup and view all the answers

Who is most closely associated with the theory of Cognitive Development?

<p>Jean Piaget (C)</p> Signup and view all the answers

What central idea does the Socio-Cultural Approach emphasize in understanding behavior?

<p>The role of social and cultural environments (D)</p> Signup and view all the answers

Which of the following explanations aligns with Evolutionary Theory in psychology?

<p>Psychological traits have developed through natural selection (D)</p> Signup and view all the answers

What does the Humanistic Approach in psychology primarily focus on?

<p>The capacity for personal growth and free will (C)</p> Signup and view all the answers

Freud’s Psychoanalysis posits that which of the following drives human behavior?

<p>Unconscious motivations and repressed experiences (A)</p> Signup and view all the answers

William Wundt is best known for founding which branch of psychology?

<p>Structuralism (B)</p> Signup and view all the answers

What is a primary characteristic of a double blind design in research?

<p>Neither the participants nor the experimenters know which group is receiving treatment. (A)</p> Signup and view all the answers

Which statistical measure represents the central tendency of a data set?

<p>Mean (B)</p> Signup and view all the answers

Which phenomenon occurs when participants expect an improvement, leading to actual positive outcomes?

<p>Placebo effect (A)</p> Signup and view all the answers

What is an example of inferential statistics?

<p>Generalizing findings from a sample to a population (A)</p> Signup and view all the answers

What ethical issue is highlighted by the Tuskegee study?

<p>Participants were treated without consideration of their health (D)</p> Signup and view all the answers

What is the primary focus of operant conditioning?

<p>The consequences of an organism's behavior (B)</p> Signup and view all the answers

Which scenario illustrates negative reinforcement?

<p>Taking pain medication to alleviate discomfort (C)</p> Signup and view all the answers

Which of the following best summarizes descriptive statistics?

<p>They summarize and describe data in a meaningful way. (D)</p> Signup and view all the answers

In the context of the law of effect, which of the following statements is true?

<p>Responses that are rewarded are more likely to be repeated (B)</p> Signup and view all the answers

What issue does research participant bias primarily pertain to?

<p>Finding results that align with the researchers' expectations. (C)</p> Signup and view all the answers

Which term describes when a conditioned response occurs only to a specific stimulus?

<p>Stimulus discrimination (C)</p> Signup and view all the answers

What does practical significance refer to in research findings?

<p>The real-world importance of the results. (B)</p> Signup and view all the answers

What does positive punishment involve?

<p>Adding an unpleasant stimulus to decrease a behavior (B)</p> Signup and view all the answers

What role does the temporal lobe perform in the human brain?

<p>Comprehension of speech and storage of memories (D)</p> Signup and view all the answers

Which division of the autonomic nervous system is known for controlling rest and digestion?

<p>Parasympathetic division (A)</p> Signup and view all the answers

What is the primary imaging technique that allows visualization of brain activity during tasks?

<p>Functional MRI (fMRI) (C)</p> Signup and view all the answers

Which brain mapping method directly measures electrical activity in the brain?

<p>Electroencephalograph (EEG) (C)</p> Signup and view all the answers

Which neuroimaging technique is most precise for tracking neural activity in real-time?

<p>Magnetoencephalography (MEG) (A)</p> Signup and view all the answers

What specialized function does the occipital lobe contribute to?

<p>Visual processing of color, shape, and motion (A)</p> Signup and view all the answers

Which component of the autonomic nervous system is activated during a fight-or-flight response?

<p>Sympathetic division (B)</p> Signup and view all the answers

What does a positron emission tomography (PET) scan primarily measure?

<p>Consumption of radioactive glucose-like molecules (A)</p> Signup and view all the answers

What is the primary difference between short-term memory and long-term memory?

<p>Short-term memory holds about 7 pieces of information, while long-term memory has an unlimited capacity. (A)</p> Signup and view all the answers

Which memory strategy is NOT commonly associated with improving short-term memory retention?

<p>Random memorization (A)</p> Signup and view all the answers

What does the concept of 'decay' refer to in the context of forgetting?

<p>The gradual fading of memory over time. (A)</p> Signup and view all the answers

Which type of memory is associated with temporarily holding sensory information?

<p>Sensory memory (A)</p> Signup and view all the answers

What are schemas in the context of memory storage?

<p>Templates or organized knowledge structures stored in memory. (A)</p> Signup and view all the answers

Which of the following best describes elaborative rehearsal?

<p>Creating visual images and connecting the information to personal experiences. (A)</p> Signup and view all the answers

What is a key characteristic of iconic memory?

<p>It lasts only about 1 quarter of a second. (A)</p> Signup and view all the answers

Which method is referred to as 'the method of savings' in memory studies?

<p>The process of relearning previously known information more quickly. (D)</p> Signup and view all the answers

What is the term that describes the consistency of measurement scores over time?

<p>Test-retest Reliability (C)</p> Signup and view all the answers

Which of the following is a potential issue when using self-report measures?

<p>Malingering (B)</p> Signup and view all the answers

What percentage of married women reported that their closest emotional relationship is not with their husband according to the Hite Report?

<p>87% (D)</p> Signup and view all the answers

What does a correlation of -1 indicate?

<p>A perfect negative relationship (A)</p> Signup and view all the answers

Which type of reliability assesses whether different raters provide similar scores?

<p>Interrater Reliability (D)</p> Signup and view all the answers

What primary issue is addressed by employing a double blind design in experiments?

<p>Preventing participants from guessing their assigned group (B), Removing the influence of the researcher on participants (D)</p> Signup and view all the answers

Which statistical measure is best used to represent the central tendency of a data set with extreme outliers?

<p>Median (A)</p> Signup and view all the answers

What is the major ethical issue highlighted by the Tuskegee study?

<p>Informed consent was not obtained (C)</p> Signup and view all the answers

What best describes the placebo effect in experimental research?

<p>Improvement resulting from belief in treatment (C)</p> Signup and view all the answers

What type of statistic helps determine if results from a sample can be generalized to a larger population?

<p>Inferential statistics (B)</p> Signup and view all the answers

Which factor is NOT considered when evaluating practical significance of research findings?

<p>Statistical significance of data (D)</p> Signup and view all the answers

What does the term 'nocebo effect' refer to in experimental contexts?

<p>Harms resulting from negative expectations (A)</p> Signup and view all the answers

Which measure of variability indicates the average distance of data points from the mean?

<p>Standard deviation (A)</p> Signup and view all the answers

Which structure within the ear is responsible for converting vibrations into neural activity?

<p>The cochlea (C)</p> Signup and view all the answers

What are the five basic tastes that humans can detect?

<p>Sweet, salty, sour, bitter, umami (A)</p> Signup and view all the answers

Which part of the body has a low two-point threshold due to a high density of somatosensory receptors?

<p>Fingers (C), Hands (D)</p> Signup and view all the answers

What is the significance of the homunculus representation in the primary somatosensory cortex?

<p>It shows a proportional representation of sensory input from various body parts. (D)</p> Signup and view all the answers

How do olfaction and gustation enhance our eating experience?

<p>By intensifying the liking or disliking of certain foods (A)</p> Signup and view all the answers

What distinguishes the receptors in olfactory neurons from taste receptors on the tongue?

<p>Olfactory receptors recognize odorants by shape, while taste receptors do not. (B)</p> Signup and view all the answers

Which sensory system is primarily responsible for the detection of pressure and texture on the skin?

<p>Somatosensory system (D)</p> Signup and view all the answers

Which part of the brain processes both smell and taste information?

<p>Orbitofrontal cortex (B)</p> Signup and view all the answers

What is a major role of the substantia nigra in the brain?

<p>Controlling movement by providing dopamine (A)</p> Signup and view all the answers

Which function is primarily associated with the hypothalamus?

<p>Regulating the body's internal states and behaviors (C)</p> Signup and view all the answers

What is the primary function of the prefrontal cortex?

<p>Thinking and decision-making (C)</p> Signup and view all the answers

What role does the corpus callosum play in the brain?

<p>It connects the two cerebral hemispheres for communication. (C)</p> Signup and view all the answers

Which lobe of the brain is specialized for processing sensory information related to touch?

<p>Parietal lobe (B)</p> Signup and view all the answers

Which structure is primarily involved in emotional processing within the limbic system?

<p>Amygdala (B)</p> Signup and view all the answers

What is the primary characteristic of Stage 3 (non-REM) sleep?

<p>Characterized by delta waves (D)</p> Signup and view all the answers

What aspect of the basal ganglia is particularly significant regarding movement?

<p>It governs voluntary actions and reward-seeking behavior. (B)</p> Signup and view all the answers

At what age is the prefrontal cortex typically considered to be fully developed?

<p>25 years (A)</p> Signup and view all the answers

Which structure regulates the body’s circadian rhythm?

<p>Suprachiasmatic nucleus (B)</p> Signup and view all the answers

What typically occurs during REM sleep?

<p>Muscle paralysis (A)</p> Signup and view all the answers

How long does a typical sleep cycle last?

<p>90 minutes (C)</p> Signup and view all the answers

Which of the following is a consequence of sleep deprivation?

<p>Increased risk for cardiovascular problems (B)</p> Signup and view all the answers

What role do sleep spindles and K-complexes play during sleep?

<p>They help consolidate memories (A)</p> Signup and view all the answers

What physiological change is triggered by increased levels of melatonin?

<p>Initiation of sleep (A)</p> Signup and view all the answers

Which statement best describes the impact of circadian rhythm disruption?

<p>It can lead to health problems and increased injury risks (D)</p> Signup and view all the answers

What are the three primary colors based on the trichromatic theory of color vision?

<p>Blue, green, red (C)</p> Signup and view all the answers

Which theory of color perception describes the function of complementary, opposing colors?

<p>Opponent process theory (A)</p> Signup and view all the answers

How does the quality of light affect the perception of color?

<p>Brightness, hue, and saturation all contribute to color perception (B)</p> Signup and view all the answers

What does inattentional blindness refer to?

<p>Not noticing stimuli when attention is focused elsewhere (C)</p> Signup and view all the answers

What aspect of sound does the term 'timbre' refer to?

<p>The complexity of sound (B)</p> Signup and view all the answers

What phenomenon explains the brain's ability to combine various types of sensory information into a coherent perception?

<p>Binding problem (A)</p> Signup and view all the answers

Which area of the brain is involved in processing lines and orientations in visual perception?

<p>Occipital lobe (A)</p> Signup and view all the answers

What is the role of selective attention in perception?

<p>It allows for focused processing of certain inputs while ignoring others (B)</p> Signup and view all the answers

Which of the following best describes the relationship between sound frequency and pitch?

<p>Higher frequency results in higher pitch (D)</p> Signup and view all the answers

What is a primary function of the optic nerve?

<p>Carrying visual information to the brain (A)</p> Signup and view all the answers

Flashcards

Neuron function

Neurons are specialized brain cells that communicate with each other.

Neurotransmitter

Chemical messengers that allow neuron-to-neuron communication.

Synapse

The space between two neurons where neurotransmitters travel.

Reuptake

The process where unused neurotransmitters are reabsorbed into the axon terminal.

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Glutamate

An excitatory neurotransmitter.

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GABA

An inhibitory neurotransmitter.

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Cerebellum function

Coordinates motor functions, balance, and posture.

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Medulla function

Controls vital functions like breathing, heart rate, and digestion.

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Temporal Lobe Function

Processes auditory information, language understanding, and stores memories.

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Occipital Lobe Function

Processes visual information, like colour, shape, and motion.

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Sympathetic Nervous System

Part of the autonomic nervous system activated during crisis or stressful situations.

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Parasympathetic Nervous System

Part of the autonomic nervous system that controls rest and digestion.

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EEG (Electroencephalograph)

Measures electrical activity in the brain using electrodes on the scalp.

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CT Scan

Uses X-rays to create 3D images of brain structure.

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fMRI (Functional MRI)

Measures brain activity by detecting changes in blood oxygen levels.

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TMS (Transcranial Magnetic Stimulation)

Uses magnetic fields to manipulate brain activity, enabling inferences about cause and effect.

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Sensation

The detection of physical energy by the sense organ.

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Perception

The brain's interpretation of raw sensory data.

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Bottom-up processing

Sensation driven by external stimulus properties.

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Top-down processing

Perception driven by internal properties (prior knowledge, goals).

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Absolute threshold

The lowest level of a stimulus we can detect 50% of the time.

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Just noticeable difference

The smallest amount of stimulus change humans can detect.

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Transduction

Conversion of a stimulus into neural activity.

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Sensory adaptation

A decrease in sensitivity to a constant stimulus.

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Stream of consciousness

The continuous flow of changing sensations, images, thoughts, and feelings we experience.

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Meta-cognition

Thinking about our own thinking processes.

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Theory of mind

Understanding that others have different thoughts, feelings, and perceptions than you do.

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Circadian rhythm

A cyclical change in our body's functions that occurs approximately every 24 hours.

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Suprachiasmatic nucleus (SCN)

A brain region located in the hypothalamus that regulates our circadian rhythm.

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Sleep debt

A buildup of insufficient sleep that can have negative consequences for physical and mental health.

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Stages of sleep

We cycle through stages of sleep in 90-minute intervals, including non-REM (stages 1-3) and REM sleep.

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REM sleep

A stage of sleep characterized by vivid dreams, rapid eye movements, and increased brain activity.

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Stimulus Discrimination

The ability to differentiate between a conditioned stimulus (CS) that predicts an unconditioned stimulus (UCS) and other similar stimuli that do not.

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Second-order Conditioning

A process where a neutral stimulus becomes a conditioned stimulus (CS) by being paired with an already established conditioned stimulus (CS).

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Operant Conditioning

Learning where behavior is modified by its consequences. Behaviors followed by positive consequences are more likely to be repeated.

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Law of Effect

Behaviors followed by positive consequences are more likely to be repeated, while behaviors followed by negative consequences are less likely to be repeated.

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Positive Reinforcement

Adding a pleasant stimulus to increase the likelihood of a behavior.

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Rhodopsin

A type of photopigment found in rods, responsible for light sensitivity in low-light conditions.

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Optical Nerve

A bundle of axons from ganglion cells in the eye, transmitting visual information to the brain. It creates a blind spot where it exits the eye.

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Brightness

The intensity of light reflected off a surface, perceived as a degree of lightness or darkness.

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Hue

The actual color of an object, determined by the wavelength of light it reflects.

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Saturation

The purity of a color, ranging from dull to vibrant.

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Trichromatic Theory

Explains color vision through sensitivity to three primary colors (blue, green, red) detected by different types of cones in the eye.

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Opponent Process Theory

Describes color perception as a function of opposing pairs: red/green, blue/yellow, black/white. One color inhibits the perception of its opposite.

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Feature Detectors

Specialized neurons in the visual cortex that respond to specific features of visual stimuli like lines, orientations, or movements.

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Inattentional Blindness

Failure to notice a clearly visible object or event when our attention is focused elsewhere.

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Binding Problem

The mystery of how the brain integrates different sensory features (shape, color, sound, etc.) to create a unified perception of an object.

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Negative Correlation

As one variable increases, the other decreases.

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Illusory Correlation

Perceiving a relationship between variables where none exists.

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Correlation ≠ Causation

Just because two things are related doesn't mean one causes the other.

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Cross-Sectional Design

Comparing people of different ages at a single time point.

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Longitudinal Design

Following the same group of people over time.

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What is introspection?

A method where an individual reflects on their own thoughts and experiences, identifying the basic elements of consciousness. Used by early psychologists to understand how people perceive the world.

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What is Structuralism?

A school of thought that aims to understand the structure of the mind by identifying the basic elements of conscious experience. Relied on introspection as its primary tool.

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What is Functionalism?

Focuses on the practical functions of the mind, examining how it helps us adapt to our environment and survive. Influenced by evolutionary theory.

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What is Behaviourism?

Focuses on observable behaviors and how they are learned through environmental influences. Emphasizes the role of reinforcement and punishment.

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What is Cognitivism?

Focuses on mental processes like attention, memory, and reasoning, emphasizing how our thoughts influence our behaviors and perceptions.

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What is Psychoanalysis?

Focuses on unconscious processes, early childhood experiences, and the role of internal conflicts in shaping personality and behavior.

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Humanistic Approach

Emphasizes human potential for growth, creativity, and self-actualization. It values free will, personal responsibility, and the pursuit of meaning.

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Socio-cultural Approach

Examines the influence of social and cultural factors on behavior. It considers how our environment shapes our thoughts, feelings, and actions.

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What are the four types of operant conditioning?

Positive reinforcement, negative reinforcement, positive punishment, negative punishment.

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Placebo Effect

An improvement in a person's condition due to their belief that they are receiving a treatment, even if the treatment has no actual effect.

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Nocebo Effect

Experiencing harm or negative effects due to the expectation of harm, even if the treatment or situation has no real negative impact.

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Experimenter Bias

The researcher unintentionally influencing the outcome of the study by their own expectations or beliefs.

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Research Participant Bias

Participants' behavior being influenced by their awareness of the study's hypothesis or their desire to meet the researcher's expectations.

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Descriptive Statistics

Mathematical tools used to summarize and describe sets of data.

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Inferential Statistics

Statistical methods that allow us to draw conclusions and make inferences about larger populations based on data from samples.

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Statistical Significance

A result is statistically significant if it is unlikely to have occurred by chance.

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Practical Significance

The extent to which research findings have real-world importance and application.

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Memory

The ability to retain information over time, encompassing facts, experiences, and skills.

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Sensory Memory

The brief, initial stage of memory that holds sensory information for a fraction of a second, like a snapshot of what we see or hear.

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Short-Term Memory (STM)

The memory system where we actively hold and process information for a short time (around 30 seconds), usually 7 +/- 2 pieces of information at a time.

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Long-Term Memory (LTM)

The relatively permanent memory system with a vast capacity for storing information over long periods.

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Chunking

A strategy for improving short-term memory by grouping or organizing information into meaningful units.

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Elaborative Rehearsal

A strategy for transferring information into long-term memory by actively relating it to existing knowledge and experiences.

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Recall

A measure of memory that involves retrieving previously learned information without any cues.

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Recognition

A measure of memory that involves identifying previously learned information from a set of options or choices.

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fMRI

Functional Magnetic Resonance Imaging (fMRI) uses magnetic fields to measure brain activity by detecting changes in blood oxygen levels during tasks.

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Sampling Bias

A flaw in research where the sample of participants doesn't accurately represent the population being studied, leading to misleading conclusions.

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Reliability

The consistency of a measure or test over time, repeated trials, and different users.

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Validity

The extent to which a measure assesses what it intends to measure.

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Positive Impression Management

A bias in self-report measures where individuals present themselves in a more positive light than reality.

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Correlation

A statistical relationship between two variables, indicating how strongly they are related.

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Control Group

A group in an experiment that does not receive the treatment or intervention being studied. Used as a baseline for comparison with the experimental group.

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Experimental Group

The group in an experiment that receives the treatment or intervention being studied. Their results are compared to the control group to determine the effects of the treatment.

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Substantia Nigra

A brain region primarily responsible for producing dopamine, a neurotransmitter crucial for voluntary movement. It's also linked to experiences of reward and is affected in Parkinson's disease.

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Thalamus

A relay station in the forebrain that filters and transmits sensory information to the cerebral cortex, preventing overload and guiding our attention.

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Hypothalamus

A small but important brain structure responsible for regulating basic bodily functions such as eating, drinking, and sexual behaviors.

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Basal Ganglia

A group of structures in the forebrain involved in planning and executing voluntary movements, especially those aimed at obtaining rewards.

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Limbic System

A network of brain structures responsible for emotions, memory, and motivation.

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Cerebral Cortex

The outermost layer of the brain, responsible for higher cognitive functions such as language, memory, and reasoning.

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Corpus Callosum

A thick band of nerve fibers connecting the two hemispheres of the brain, allowing for communication and coordination between them.

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Lateralization

The specialization of functions in each hemisphere of the brain. While each hemisphere has specialized functions, they work together through the corpus callosum.

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Photopigment in rods

A light-sensitive chemical called rhodopsin is found in rods, specialized cells in the eye that detect low-light conditions.

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What is the optic nerve?

The optic nerve is a bundle of axons from ganglion cells in the eye, transmitting visual information to the brain. It creates a blind spot where it exits the eye.

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What is Hue?

Hue refers to the actual color of an object, determined by the specific wavelength of light it reflects.

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What is Saturation?

Saturation describes the purity of a color, ranging from dull (low saturation) to vibrant (high saturation).

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What is Inattentional Blindness?

This happens when we fail to notice a clearly visible object or event because our attention is focused elsewhere.

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What is the Binding Problem?

This mystery concerns how the brain integrates different sensory features (shape, color, sound, etc.) to create a unified perception of an object.

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What is Loudness?

Loudness describes the intensity or amplitude of sound waves, measured in decibels (dB).

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Non-REM Sleep

Stages 1-3 of sleep characterized by no eye movements and fewer dreams, promoting physical restoration.

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Delta Waves

Slow brain waves that occur in the deepest stage of sleep (Stage 3) and promote physical repair and rejuvenation.

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Middle Ear Function

The middle ear contains three tiny bones (ossicles) that vibrate and transmit sound waves from the eardrum to the inner ear.

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Inner Ear Function

The inner ear houses the cochlea, a fluid-filled structure that converts sound vibrations into neural signals.

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Olfaction and Gustation

The senses of smell (olfaction) and taste (gustation) work together to create our perception of flavors.

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Five Basic Tastes

Our taste buds detect five basic tastes: sweet, salty, sour, bitter, and umami. There might be evidence of a sixth taste for fatty foods.

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Somatosensory Receptors

Sensory receptors located throughout the body detect touch, pressure, temperature, and pain.

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Two-point Threshold

The minimum distance between two points on the skin that can be felt separately is the two-point threshold.

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Homunculus

The homunculus is a distorted representation of the human body, showing the relative amount of somatosensory cortex dedicated to different body parts.

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Consciousness

Our subjective experience of our thoughts, feelings, and sensations, ranging from hyper-focused attention to daydreaming.

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Study Notes

Theoretical Perspectives in Psychology

  • Psychology has seven major schools of thought that have shaped modern psychology
  • These schools offer different approaches to understanding behavior, with no single "correct" perspective

The History of Psychology

  • Psychology was originally part of philosophy, focusing on the mind, observation, and common sense
  • William Wundt established the first psychology laboratory in 1879
  • Introspection (reflecting on one's own thought process) was a key method in early psychology

Structuralism

  • Focused on understanding the fundamental elements of consciousness
  • William Wundt and Edward Titchener were key figures
  • Aim was to identify the basic components of psychological experience

Evolutionary Theory

  • Charles Darwin and later David Buss influenced this theory
  • The theory explains behavior based on evolution, including natural selection, variation, selective advantage, and inheritance
  • Aims to understand the adaptive purposes of psychological characteristics such as aggression, phobias, and memory.

Behaviorism

  • Watson and Skinner were central figures in this school
  • The focus is on observable behaviors that can be measured and recorded
  • Learning is explained through general laws of learning

Cognitivism

  • Piaget and Neisser focused on the role of thoughts in driving behavior
  • The aim of this school is to understand how thoughts impact behavior in various contexts. This includes things like attention, memory, and adaptive thinking patterns

Psychoanalysis

  • Freud and Jung were influential figures in this perspective
  • The emphasis is on unconscious processes, often stemming from early childhood experiences.
  • The theory explores the unconscious drives that influence behavior.

Additional Approaches

  • Humanistic Approach: Focuses on the capacity for people to grow and flourish; emphasizes free will and altruism.
  • Socio-cultural Approach: Examines how social and cultural factors influence behavior; looks across cultures.
  • Biological Approach: Examines how brain, nervous system, and genetic factors influence behavior.

What Do Psychologists Do?

  • Wide range of practices in various settings
  • Focuses on mental health, educational adjustments, and community-psychology

The Scientific Toolbox

  • Psychologists use various methods for gathering evidence.
  • This includes: Naturalistic observation, case studies, self-report measures, correlational designs, and experimental designs

Evaluating Self-Report Measures

  • Reliability: Consistency of measurement over time and across repeated measures
  • Validity: Degree to which a measure assesses what it claims to measure

Naturalistic Observation

  • Observing behavior in real-world settings
  • High external validity (findings can be generalized)
  • Low internal validity (cannot determine cause-and-effect)

Case Studies

  • Studying one or a few individuals in depth
  • Useful for examining rare or unusual phenomena
  • May not be generalizable to the wider population due to low external validity

Self-Report and Surveys

  • Measures subjective characteristics like personality, mental health, and attitudes
  • Can be used for opinions, attitudes and perceptions

Correlation Design

  • Examines the relationship between two or more variables
  • Positive correlations mean variables change in the same direction
  • Negative correlations mean variables change in opposite directions
  • Zero correlation means no relationship
  • Cannot determine cause-and-effect relationships

Longitudinal Designs.

  • Study the same group of individuals over time to track how those individuals changes

Experimental Designs

  • Manipulating independent variable and measuring dependent variable
  • Aims to determine cause-and-effect relationships
  • Involves controlling and manipulating variables for accurate results.

Experimenter Bias

  • Experimenter bias comes in the form of unintentional influence on the results by the researcher

Participant Bias

  • Subtle cues by the researcher that lead participants to guess the study's hypothesis

Ethical Issues in Research

  • Must adhere to ethical guidelines when conducting psychological research

Statistics (Descriptive & Inferential)

  • Descriptive Statistics summarise data
  • Inferential Statistics: Used to draw conclusions or make inferences from data

Neurons and Transmission

  • Neurons communicate through neurotransmitters in the synapse.
  • Neurotransmitters are chemical messengers. Some excite and others inhibit the nervous system to help transmit messages in the body

Hindbrain, Midbrain, Forebrain

  • Hindbrain controls vital functions
  • Midbrain acts as a relay center
  • Forebrain is the largest portion of the brain and controls complex function, such as cognitive

The Cerebral Cortex

  • Divided into four lobes: Frontal, Parietal, Occipital, and Temporal.
  • Each lobe has specialized functions

Sensation and Perception

  • Sensation: The detection of physical stimulus
  • Perception: The brain's interpretation of raw sensory data
  • Bottom-up and top-down processing are both important in sensory experience

Psychophysics

  • Study of the relationship between physical stimuli and our psychological response

The Visual System

  • Includes the eye, light reception, signal transmission to the brain, and interpretation
  • Our visual perception is dependent on the brightness, color, and purity of light

Color perception

Perception of Color

The Role of Attention in Perception

  • Selective attention allows us to focus on specific stimuli
  • This allows us to filter out less important information
  • Inattentional blindness occurs when you don't notice stimuli in plain sight, and change blindness arises when you fail to notice changes in a scene.

Biology of Sleep

  • Circadian rhythms regulate our sleep-wake cycle on a 24-hour basis
  • Sleep has different stages, including non-REM and REM
  • Sleep deprivation can have negative effects on cognitive and physical health

Learning

  • Classical conditioning associates two stimuli, creating a response to one previously neutral stimulus
  • Operant conditioning involves learning through consequences of behavior (rewards and punishments)

Memory

  • Memory is the retention of information over time
  • Memory processes involve sensory memory, short-term memory, and long-term memory stages.
  • Memory involves acquiring, storing, and retrieving information in the brain

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