Research Fundamentals Quiz

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Questions and Answers

What is the primary purpose of using a confounding variable in research?

  • To control for other factors that may affect the relationship between variables (correct)
  • To influence the outcome of the study
  • To simplify the research design
  • To identify unexpected variables

Which type of data represents categories with a meaningful order but unequal intervals?

  • Nominal Data
  • Interval Data
  • Ordinal Data (correct)
  • Radio Data

What does it mean when a study shows a correlation between two variables?

  • There is a statistical relationship between the two variables (correct)
  • One variable causes changes in the other
  • The variables are independent of one another
  • Both variables are influenced by a third variable

What is the significance of a correlation coefficient in research?

<p>It quantifies how closely two variables vary together (B)</p> Signup and view all the answers

What is the primary difference between between-subjects design and within-subjects design?

<p>Within-subjects allows participants to experience all conditions (D)</p> Signup and view all the answers

What does statistical significance indicate in research findings?

<p>The likelihood that results occurred by chance is low (B)</p> Signup and view all the answers

What is a major characteristic of a longitudinal study?

<p>It examines changes in the same group over time (B)</p> Signup and view all the answers

What concept highlights that correlation does not imply causation?

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

What was the main purpose of the experiment investigating social pressure?

<p>To study the influence of majority groups on individual decisions (A)</p> Signup and view all the answers

What percentage of participants conformed to the incorrect answers at least once during the experiment?

<p>75% (D)</p> Signup and view all the answers

Which part of the neuron is responsible for transmitting signals over long distances?

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

Which type of glial cell is primarily involved in the formation of myelin in the central nervous system?

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

What role do neurotransmitters play in the synaptic gap?

<p>They enable chemical signaling between neurons (C)</p> Signup and view all the answers

What is the primary function of the parasympathetic nervous system?

<p>To conserve energy and promote resting states (B)</p> Signup and view all the answers

Which brain imaging technique is used to measure electrical activity in neurons?

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

How does the presence of a dissenter affect conformity rates in social pressure experiments?

<p>It decreases conformity rates significantly (C)</p> Signup and view all the answers

What does Functional Magnetic Resonance Imaging (fMRI) primarily measure?

<p>Blood flow to brain regions (B)</p> Signup and view all the answers

Which brain region is primarily associated with explicit memory?

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

Viewing trauma-related material activates which brain centers more than unrelated footage?

<p>Fear, memory, and visual centers (A)</p> Signup and view all the answers

What phenomenon relates to the perception of owning a rubber hand?

<p>Rubber hand illusion (C)</p> Signup and view all the answers

Which process describes the brain's ability to adapt and recover from injury?

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

In the context of pharmacology, which term refers to a substance that blocks a neurotransmitter's action?

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

Which psychological phenomenon suggests that self-control is a finite resource?

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

What therapeutic approach utilizes visual feedback to alleviate phantom limb pain?

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

What is the primary purpose of a placebo-controlled study?

<p>To compare the effects of a real treatment against a placebo (B)</p> Signup and view all the answers

Which statement best describes the nocebo effect?

<p>Negative outcomes caused by harmful expectations (B)</p> Signup and view all the answers

What is the purpose of the null hypothesis (H0)?

<p>To serve as a baseline for comparison (A)</p> Signup and view all the answers

In what circumstance would a single blind procedure be used?

<p>When the researcher knows the treatment, but the participant does not (B)</p> Signup and view all the answers

What is pivotal about representative samples in research?

<p>They enhance the reliability of the results (B)</p> Signup and view all the answers

Which research method involves manipulating one or more variables to identify cause and effect?

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

Which of the following best defines central tendency in descriptive statistics?

<p>A single score summarizing an entire set of scores (B)</p> Signup and view all the answers

What does the Barnum Effect illustrate in psychology?

<p>Vague statements can be perceived as personally accurate (C)</p> Signup and view all the answers

What is a primary weakness of descriptive research methods?

<p>Inability to manipulate independent variables (B)</p> Signup and view all the answers

What does a normal curve indicate in data representation?

<p>Symmetrical distribution of many types of data (C)</p> Signup and view all the answers

How does a moderating variable affect the relationship between two variables?

<p>It can strengthen or weaken the relationship (D)</p> Signup and view all the answers

How does counterbalancing improve research validity?

<p>It eliminates the influence of varying order effects (B)</p> Signup and view all the answers

What characterizes a falsifiable hypothesis?

<p>It can be tested and potentially refuted (B)</p> Signup and view all the answers

What is the intended impact of the Hawthorne effect in research?

<p>Participants alter behavior because they know they are observed (B)</p> Signup and view all the answers

What distinguishes operational definitions in psychological research?

<p>They describe variables in observable and measurable terms (B)</p> Signup and view all the answers

What is a significant drawback of correlational research?

<p>It can't specify cause and effect (C)</p> Signup and view all the answers

What brain area is commonly associated with behavioral withdrawal and negative emotions?

<p>Right Frontal Lobe (B)</p> Signup and view all the answers

What imaging method tracks magnetic fields from the brain's electrical currents?

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

What does a Computed Tomography (CT) scan primarily provide?

<p>Detailed images of brain structure (B)</p> Signup and view all the answers

Which imaging technique tracks the flow of a radioactive form of glucose in the brain?

<p>Positron Emission Tomography (PET) (C)</p> Signup and view all the answers

In children with brain injuries, what does the location of damage in CT scans predict?

<p>Intelligence and memory processing (D)</p> Signup and view all the answers

What does Magnetic Resonance Imaging (MRI) use to create a map of brain structure?

<p>Magnetic fields and radio waves (D)</p> Signup and view all the answers

Monkeys with an anxious temperament show heightened glucose use in which type of brain regions?

<p>Regions related to fear, memory, and reward expectations (B)</p> Signup and view all the answers

Which of the following characteristics is often found in individuals with a history of violence?

<p>Smaller frontal lobes (B)</p> Signup and view all the answers

Flashcards

Independent Variable

The variable that is manipulated or changed by the researcher.

Dependent Variable

The outcome or effect that is measured in an experiment.

Confounding Variables

Other factors that might influence the outcome of an experiment, besides the independent variable.

Correlation

A statistical measure that describes the relationship between two variables.

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Correlation Coefficient

A numerical value that indicates the strength and direction of the relationship between two variables.

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Regression Toward the Mean

The tendency for extreme or unusual scores to fall back to the average over time.

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Causation

Establishing that one variable directly causes changes in another.

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Descriptive Statistics

A statistical method used to summarize data using measures like mean, median, and mode.

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Hypothesis

A statement that predicts a relationship between two or more variables that can be tested.

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Falsifiability

The ability of a hypothesis to be proven false.

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Null Hypothesis (H0)

A statement that there is no effect or difference between variables.

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Alternative Hypothesis (HA)

A statement that predicts an effect or difference between variables.

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Experimental Research

A research method that manipulates and controls variables to identify cause and effect relationships.

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Naturalistic Observation

A research method that observes and describes behavior in natural settings without manipulation.

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Correlational Research

A research method that focuses on statistical analysis of relationships between variables.

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Moderating Variable

A factor that influences the strength or direction of the relationship between two variables.

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Social Influence

The influence of others on an individual's decisions, even if they know the behaviour is wrong.

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Asch Conformity Experiment

An experiment exploring how social pressures in a majority group affect individuals' choices.

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Neuron

A specialized cell that transmits electrical signals across long distances, forming the basis of the nervous system.

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Action Potential

A brief electrical charge traveling down an axon, allowing neurons to communicate over long distances.

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Glial Cells

Supporting cells in the nervous system that provide structure, insulation, and support.

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Neurotransmitters

Chemicals that transmit signals between neurons across synapses.

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Synaptic Gap

The space between neurons where neurotransmitters are released.

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Autonomic Nervous System

A branch of the autonomic nervous system that controls involuntary bodily functions, like heart rate and digestion.

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Representative Sample

A smaller group selected from a larger population that accurately reflects the characteristics of that population.

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Placebo Effect

When participants experience changes simply because they believe they are receiving treatment, even if the treatment is inactive.

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Nocebo Effect

When negative expectations about a treatment cause harmful effects, even though the treatment is inactive.

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Double Blind Procedure

Both the researcher and the research staff are unaware about whether the research participants have received the treatment or a placebo. This eliminates bias.

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Conformity

The act of changing your behavior, beliefs, or opinions to match those of a group or to fit social norms.

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Inferential Statistics

Numerical data that allows one to infer from sample data the probability of something being true of a population. It helps us draw conclusions about larger groups from smaller ones.

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Counterbalancing

Participant sample is divided in half, one completing the conditions in one order, the other completing them in the reverse order. It helps control for the order effect in experiments.

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Magnetoencephalography (MEG)

A brain imaging technique that tracks brain activity by measuring magnetic fields generated by electrical currents in the brain.

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Computed Tomography (CT)

A brain imaging technique using X-rays to create images of the brain, useful for identifying brain damage.

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Positron Emission Tomography (PET)

A brain imaging technique that tracks brain activity by measuring the distribution of a temporarily radioactive form of glucose in the brain.

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Magnetic Resonance Imaging (MRI)

A brain imaging technique that creates detailed images of the brain structure using magnetic fields and radio waves.

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Right Frontal Lobe

A brain region associated with behavioral withdrawal and negative emotions.

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How MEG helps understand PTSD.

A brain imaging technique that tracks brain activity by measuring magnetic fields generated by electrical currents in the brain. When PTSD patients view trauma-related images, their visual cortex shows stronger magnetic fields compared to non-PTSD individuals.

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How CT scans help understand childhood brain injuries

Brain injuries in children detected through CT scans can predict impairments in their intelligence and memory processing.

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How PET scans help understand anxiety

Monkeys with an anxious temperament have brains that use more glucose in regions associated with fear, memory, and reward/punishment expectations.

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What does fMRI measure?

fMRI measures brain activity by detecting changes in blood flow. It compares continuous MRI scans to show which brain regions are more active during specific tasks.

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What is the function of the hippocampus?

The hippocampus is a brain structure crucial for forming new explicit memories, which are memories for facts and events.

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What is brain plasticity?

Brain plasticity refers to the brain's ability to change and adapt its structure and function in response to experiences or injury. It enables recovery after brain damage.

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What is the axon hillock's role?

The axon hillock is a specialized region of a neuron where the decision to generate an action potential is made. It integrates incoming signals and determines if they are strong enough to trigger a signal.

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What are agonists and antagonists?

An agonist enhances the effects of a neurotransmitter by mimicking it, while an antagonist blocks or reduces the effects of a neurotransmitter. They can be used to treat imbalances in neurotransmitter levels.

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What does the rubber hand illusion show?

The rubber hand illusion demonstrates how our brain integrates sensory information from multiple sources, such as touch and sight, to create a sense of body ownership. It shows that our perception of our body can be manipulated.

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What is ego depletion theory?

Ego depletion theory proposes that self-control is like a muscle that gets tired with overuse. After exerting self-control, we have less willpower to resist temptations.

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What is phantom limb pain and how is it treated?

Phantom limb pain is the sensation of pain in a limb that has been amputated. Mirror therapy uses visual feedback to help the brain 'remap' the missing limb and reduce pain.

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Study Notes

Research Fundamentals

  • Barnum Effect: People believe vague, general statements about personality/behavior are accurate for them, even though they apply to many. Skepticism is important.
  • Operational Definition: Explains a concept so it's observable and measurable.
  • Hypothesis: A testable statement predicting the relationship between 2 or more variables. It's based on prior knowledge and must be falsifiable (able to be proven false).
  • Falsifiability: Every hypothesis must be capable of being proven false. Evidence cannot definitively prove a hypothesis true, but it can prove it wrong.
  • Null Hypothesis (H₀): A statement that there is no effect or difference between variables. It's considered true until proven false.
  • Alternative Hypothesis (Hₐ): A statement proposing an effect or difference between variables.
  • Research Methods:
    • Experimental: Manipulating variables to identify cause and effect, using random assignment. Weakness: might not be feasible in all situations, and results might not generalize to other contexts, and ethical concerns may arise.
    • Descriptive: Observing behavior in natural settings, surveys, case studies, and labs to describe characteristics of groups. Weakness: lack of control over variables, misleading descriptions for single cases.
    • Correlation: Analyzes relationships between variables, only showing associations, not necessarily causation. Weakness: cannot determine cause-and-effect.

Additional Research Concepts

  • Moderating Variables: Factors that change the strength or direction of a relationship between two other variables.
  • Casual Event: An event that causes another event.
  • Replication: Repeating a study to confirm results.
  • Independent Variable: The variable manipulated by the researcher.
  • Dependent Variable: The outcome measured to see the impact of the independent variable.
  • Confounding Variable: A factor that influences an observation, potentially causing a correlation to appear between other variables.
  • Correlation Coefficient: A number that reflects the strength and direction of the relationship between two variables.
  • Regression Toward the Mean: Extreme scores tend to move closer to the average on subsequent measures. This doesn't imply causation.
  • Causation: A definite link where one variable directly affects another. Correlation does not equal causation.
  • Descriptive Statistics: Summarizes data using measures like mean, median, and mode.
  • Effect Size: Measures the strength of the relationship between variables.
  • Statistical Significance: Indicates how likely a result occurred by chance.

Research Procedures

  • Single-blind Procedure: Participants unaware of whether they are in the treatment or control group.
  • Double-blind Procedure: Neither participants nor researchers know which group is receiving treatment.
  • Placebo Effect: Positive changes due to belief in treatment, regardless of its actual effect.
  • Nocebo Effect: Negative changes due to negative expectations of a treatment.
  • Hawthorne Effect: Participants' behavior changes due to being observed.
  • Central Tendency: A measure that represents a whole set of scores
  • Skewed Distribution: Scores that lack symmetry around their average value.
  • Standard Deviation: A measure of how much scores vary around the mean score.
  • Normal Curve: A symmetrical, bell-shaped curve, used to represent data distribution.
  • Inferential Statistics: Determining probabilities of claims about a population based on samples.
  • Representative Samples: Samples that accurately reflect characteristics of a larger population.

Brain Imaging Techniques

  • EEG: Measures brain electrical activity.
  • MEG: Measures brain magnetic fields.
  • PET: Tracks glucose activity in the brain.
  • MRI: Creates detailed images of brain structure.
  • fMRI: Measures blood flow to active brain regions.
  • DTI: Measures water diffusion in the brain to infer connections between brain regions.
  • NIRS: Measures blood oxygenation levels in the brain.

Neuroscience Concepts (from page 5 and 6)

  • Neuron: The basic unit of the nervous system.
  • Action Potential: Neural impulse, a brief electrical charge that travels down an axon.
  • Synapse: The junction between neurons.
  • Glial Cells: Support cells for neurons.
  • Neurotransmitters: Chemical messengers that transmit signals across synapses.
  • Agonists and Antagonists: Substances that either increase or decrease the effect of neurotransmitters, respectively.
  • Autonomic Nervous System: Regulates involuntary body functions.
  • Para- and sympathetic nervous systems: Different parts of the Autonomic Nervous System, each affecting different bodily functions.

Conformity and the Asch Study

  • Conformity: Adjusting one's behavior to match a group's norms.
  • Asch Conformity Study: An experiment demonstrating the powerful effect of social pressure on group conformity.

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