PY 101 Exam 1 Study Guide
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PY 101 Exam 1 Study Guide

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Questions and Answers

How can psychology be defined?

Psychology is the study of the mind and behavior.

How did early philosophers influence what we know today as psychology?

They relied on methods such as observation and logic.

What is empiricism?

The theory that all knowledge is derived from sense-experience.

What is structuralism/introspection?

<p>The personal observation of our own thoughts, feelings, and behaviors.</p> Signup and view all the answers

What is functionalism?

<p>A theory about the nature of mental states.</p> Signup and view all the answers

What is the difference between experimental and correlational research?

<p>Experimental research involves controlled environments to observe the effect of an independent variable, whereas correlational research observes two variables to see if there is a relationship.</p> Signup and view all the answers

What is a correlation?

<p>A relationship between two variables.</p> Signup and view all the answers

How can we determine the strength of a correlation?

<p>By looking at the r value.</p> Signup and view all the answers

What is a spurious correlation?

<p>An apparent but false relationship between two (or more) variables that is caused by some other variable.</p> Signup and view all the answers

What is a hypothesis?

<p>A testable prediction, often implied by a theory.</p> Signup and view all the answers

What are independent and dependent variables?

<p>Independent variable is the experimental factor that is manipulated; dependent variable is the outcome factor.</p> Signup and view all the answers

What is Occam's Razor?

<p>The principle that the simpler explanation is more likely to be correct.</p> Signup and view all the answers

What is Clever Hans known for?

<p>Clever Hans was a horse that seemed to perform math but actually responded to involuntary cues from his trainer.</p> Signup and view all the answers

Why is random assignment useful for experimental research?

<p>It ensures that differences between groups are not systematic.</p> Signup and view all the answers

What is the difference between populations and samples?

<p>A population includes all elements from a data set; a sample consists of one or more observations drawn from the population.</p> Signup and view all the answers

What are the mean, median, and mode?

<p>Mean is the average, median is the middle value, and mode is the most common number.</p> Signup and view all the answers

When is the mode most useful?

<p>When the most common item or value of a data set is required.</p> Signup and view all the answers

What are normal distributions?

<p>A type of continuous probability distribution for a real-valued random variable.</p> Signup and view all the answers

What are skewed distributions?

<p>A distribution where one tail is longer than another.</p> Signup and view all the answers

What information does the standard deviation provide?

<p>It tells you how spread out the data is.</p> Signup and view all the answers

What are the parts of the neuron?

<p>Synapse, axon, axon terminals, and dendrites.</p> Signup and view all the answers

What are the three major types of neurons?

<p>Sensory neurons, motor neurons, interneurons.</p> Signup and view all the answers

How do neurons communicate from one neuron to the next?

<p>Via electrical events called action potentials and chemical neurotransmitters.</p> Signup and view all the answers

What are reliability and validity?

<p>Reliability is the consistency of a measure; validity is the accuracy of a measure.</p> Signup and view all the answers

What are spinal reflexes?

<p>Involve an intact reflex arc that allows quick responses without central input.</p> Signup and view all the answers

What is an action potential?

<p>A sudden, fast, transitory change of the resting membrane potential.</p> Signup and view all the answers

What is the refractory period after an action potential?

<p>The period during which a neuron cannot be excited to generate a second action potential.</p> Signup and view all the answers

What is myelin and why is it useful?

<p>Myelin is an insulating layer around nerves that helps signal transmission speed.</p> Signup and view all the answers

What is the difference between an agonist and an antagonist?

<p>An agonist activates a target; an antagonist prevents other molecules from binding.</p> Signup and view all the answers

What are the lobes of the brain and their general functions?

<p>Frontal lobe for cognitive functions, parietal lobe for sensory processing, occipital lobe for vision, temporal lobe for auditory perception.</p> Signup and view all the answers

What are the functions of the brainstem?

<p>Regulation of heart rate, breathing, sleeping, and eating.</p> Signup and view all the answers

What are the functions of the hypothalamus?

<p>Releasing hormones, regulating body temperature, daily physiological cycles, and appetite.</p> Signup and view all the answers

What is the function of the cerebellum?

<p>Regulates motor movements.</p> Signup and view all the answers

What are the functions of the corpus callosum?

<p>Unify sensory processing, information transmission, and allocation of resources.</p> Signup and view all the answers

How does information mapping occur in the somatosensory cortex?

<p>It includes sensory receptor neurons for touch, temperature, and limb position.</p> Signup and view all the answers

What is the difference between the sympathetic and parasympathetic nervous systems?

<p>The sympathetic prepares for 'fight or flight'; the parasympathetic restores calm.</p> Signup and view all the answers

What are the methods for recording brain activity?

<p>CT, EEG, PET, and fMRI.</p> Signup and view all the answers

What is genetic determinism?

<p>The belief that our genes determine our physical, behavioral, and psychological traits.</p> Signup and view all the answers

What does it mean to say that a trait is heritable?

<p>A trait can be passed on through genetics.</p> Signup and view all the answers

What is the difference between dizygotic and monozygotic twins?

<p>Dizygotic twins are fraternal and arise from separate eggs; monozygotic twins are identical.</p> Signup and view all the answers

Why are twin studies useful?

<p>They help compare behavioral similarities between identical and fraternal twins.</p> Signup and view all the answers

What does it mean for twins to be concordant or discordant for a trait?

<p>Concordant means both have or lack a trait; discordant means one has it and the other does not.</p> Signup and view all the answers

How do twin studies and adoption studies differ?

<p>Twin studies focus on genetic similarities; adoption studies assess environmental versus genetic influences.</p> Signup and view all the answers

Study Notes

Psychology Basics

  • Psychology encompasses the study of the mind and behavior, aiming to describe, explain, predict, and control mental processes.
  • Early philosophers used observation and logic, while modern psychology employs scientific methodologies.

Key Theories and Concepts

  • Empiricism: Knowledge is derived from sensory experience, developed during the 17th and 18th centuries through thinkers like John Locke and David Hume.
  • Structuralism: Focuses on introspection, the personal observation of one's thoughts and feelings.
  • Functionalism: Identifies mental states by their functions rather than their composition.

Research Methods

  • Correlational Research: Observes the relationship between two variables; can be positive or negative.
  • Experimental Research: Involves manipulating an independent variable to observe its effect on a dependent variable.
  • Correlation Strength: Measured by the r value; values close to +1 or -1 indicate strong relationships.

Statistical Concepts

  • Mean: Average of a data set; Median: Middle value; Mode: Most common value in the set.
  • Normal Distribution: Symmetrical data distribution with most values clustering around the mean.
  • Skewed Distribution: Indicates asymmetry; left-skewed data places the mean left of the median, while right-skewed places it right.
  • Standard Deviation: Measures data spread; about 95% of values fall within two standard deviations from the mean.

Neuron Structure and Function

  • Neuron Components: Includes synapse, axon, axon terminals, and dendrites, each playing roles in nerve signaling and communication.
  • Types of Neurons: Sensory neurons, motor neurons, and interneurons facilitate nervous system functions.
  • Communication: Neurons transmit signals via action potentials and neurotransmitters.

Brain Structure and Functions

  • Lobes of the Brain:
    • Frontal: Cognitive functions and voluntary movements.
    • Parietal: Processes sensory information.
    • Occipital: Responsible for vision.
    • Temporal: Involved in auditory perception.
  • Brainstem: Governs basic functions like heart rate and breathing; a relay between the body and brain.
  • Hypothalamus: Regulates hormones, temperature, appetite, and emotional responses.
  • Cerebellum: Coordinates motor movements based on sensory inputs.

Genetics in Psychology

  • Genetic Determinism: The belief that genes determine physical and psychological traits.
  • Heritability: Indicates the genetic inheritance of traits.
  • Twin Studies: MZ (identical) and DZ (fraternal) twins help assess the role of genetics in behavior and traits.
  • Concordance and Discordance: Concordant traits are shared by both twins, while discordant traits are not.

Neurotransmission and Brain Activity

  • Action Potential: A rapid change in membrane potential; involves phases of depolarization and repolarization.
  • Refractory Period: Critical time after an action potential during which another cannot be generated unless stronger stimuli are applied.
  • Myelin: Insulating layer that increases signal transmission speed.

Brain Imaging Techniques

  • CT: Produces detailed cross-sectional images using X-rays.
  • EEG: Measures brain activity associated with different psychological states.
  • PET: Utilizes glucose to illustrate neuronal activity.
  • fMRI: Combines multiple MRI images for functional brain mapping.

Nervous System Divisions

  • Sympathetic Nervous System: Activates the "fight or flight" response.
  • Parasympathetic Nervous System: Promotes calming and restorative processes in the body.

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Prepare for your PY 101 Exam 1 with this detailed study guide. Discover key concepts including the definition of psychology, its goals, and the influence of early philosophers. This resource is essential for understanding the foundations of psychology.

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