Key Concepts in Statistics and Psychology: Definitions and Explanations, Exams of Statistics

A concise overview of key concepts in statistics and psychology. It includes definitions and brief explanations of terms related to statistical analysis, research methodology, psychological disorders, cognitive processes, and various psychological theories. It serves as a quick reference guide for students and researchers in these fields, offering a summary of essential terminology and principles. Topics such as measures of central tendency, variability, experimental design, psychological disorders, and cognitive psychology concepts, providing a foundational understanding of these areas.

Typology: Exams

2025/2026

Available from 11/26/2025

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Summary Statistics &
Methodology
Response Variables - answers Variables being observed or measured in an experiment
or study
Summary Statistics - answers Descriptive statistics summarizing the main aspects of a
dataset
Measures of Location - answers Statistics that represent the central tendency of a
dataset
Arithmetic Mean - answers The sum of all values divided by the total number of values
Summary of Data - answers A concise presentation of the main characteristics of a
dataset
Measures of Spread - answers Statistics that describe the variability or dispersion of a
dataset
Flash Duration - answers The time taken for a flash, e.g., in milliseconds for fireflies
Accuracy - answers Closeness of a measurement to the true value
Precision - answers Consistency or repeatability of a measurement
Parametric Mean - answers The true mean of a population, often unknown
Statistical Mean - answers An estimated mean based on a sample from a population
Unbiased Measure - answers A measure that does not systematically overestimate or
underestimate the true value
Law of Large Numbers - answers The average of the results obtained from a large
number of trials approaches the true mean
Median - answers The middle value of a dataset when arranged in ascending order
Geometric Mean - answers The nth root of the product of n values
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Summary Statistics &

Methodology

Response Variables - answers Variables being observed or measured in an experiment or study Summary Statistics - answers Descriptive statistics summarizing the main aspects of a dataset Measures of Location - answers Statistics that represent the central tendency of a dataset Arithmetic Mean - answers The sum of all values divided by the total number of values Summary of Data - answers A concise presentation of the main characteristics of a dataset Measures of Spread - answers Statistics that describe the variability or dispersion of a dataset Flash Duration - answers The time taken for a flash, e.g., in milliseconds for fireflies Accuracy - answers Closeness of a measurement to the true value Precision - answers Consistency or repeatability of a measurement Parametric Mean - answers The true mean of a population, often unknown Statistical Mean - answers An estimated mean based on a sample from a population Unbiased Measure - answers A measure that does not systematically overestimate or underestimate the true value Law of Large Numbers - answers The average of the results obtained from a large number of trials approaches the true mean Median - answers The middle value of a dataset when arranged in ascending order Geometric Mean - answers The nth root of the product of n values

Harmonic Mean - answers The reciprocal of the arithmetic mean of the reciprocals of a set of values Mode - answers The most frequently occurring value in a dataset Variance - answers The average of the squared differences from the mean Standard Deviation - answers A measure of the amount of variation or dispersion of a set of values Standard Error of the Mean (SE) - answers The standard deviation of the sampling distribution of the mean Coefficient of Variation (CV) - answers A measure of relative variability, calculated as the standard deviation divided by the mean Central Moments - answers Statistics that describe the shape of a distribution Skewness - answers A measure of the asymmetry of the probability distribution Kurtosis - answers A measure of the tailedness of the probability distribution Interquartile Range (IQR) - answers The range of the middle 50% of the data values Confidence Intervals (CI) - answers A range of values used to estimate the true mean with a certain level of confidence Biomedical - answers Belief that abnormal behavior can be traced to genetic anomalies or brain structure issues Obsessive-compulsive disorder - answers Characterized by persistent anxiety- provoking thoughts Experiment - answers Research design with randomly assigned groups to test treatment effects Medulla - answers Brain stem area crucial for controlling breathing Preoperational - answers Piaget's stage with egocentrism, animism, and artificialism Industrial-organizational psychologist - answers Least likely to study pay incentive programs Panic disorder - answers Unpredictable anxiety attacks with physical symptoms

Mere-exposure effect - answers Positive attitude towards repeatedly advertised products Size constancy - answers Perceiving objects as constant size despite changing retinal images Receptors - answers Sensory cells detecting stimuli Afferent neurons - answers Neurons transmitting sensory information to the central nervous system Interneurons - answers Neurons processing information within the central nervous system Efferent neurons - answers Neurons transmitting signals from the central nervous system to muscles or glands Effectors - answers Muscles or glands responding to neural signals Group therapy advantage - answers Enables clients to realize shared problems Scientific study criteria - answers Conclusions verifiable by subsequent studies Rooting reflex - answers Infant turning head towards touch stimulus Neurotransmitter storage - answers Typically in the terminal buttons of a neuron Sample generalizability - answers Representative of the population studied Hostile type A personality risk - answers Increased risk for cardiovascular disease Interpersonal attraction factors - answers Include proximity and similarity Levels of processing effect - answers Group B recalls more due to focusing on meaning Rational-emotive therapy cause - answers Result of unreasonable beliefs or assumptions Freudian theory component - answers The 'id' - blind, impulsive, and irrational Informed consent concern - answers An ethical consideration in research Correlation representation - answers Graphically shown in a scatterplot

Habituation example - answers College student no longer disturbed by roommate's typing Gestalt principle - answers Illustrated by the reversible figure - figure-ground Behavioral therapy approach - answers Praising courteous behavior, ignoring threats Shaping example - answers Rewarding student for increasing quiet sitting time Hubel & Wiesel's research finding - answers Cortical cells respond strongly to specific visual info Internal locus of control belief - answers Belief in personal actions determining fate Statistical significance conclusion - answers Possibility of difference occurring by chance Percentile interpretation - answers Scored same as or higher than 42% of peers PET scan function - answers Monitors brain function through glucose metabolism Serial position effect illustration - answers Remembering first and last steps but not middle Gilligan's critique focus - answers Differences in moral development between genders Extinction condition - answers Conditioned response, stimulus, and unconditioned stimulus involved Encoding failure - answers Inability to recall specific information due to lack of encoding Social facilitation - answers Improved performance in the presence of others Retrograde amnesia - answers Inability to recall past memories before an amnesic event Repression - answers Unconscious blocking of distressing thoughts or memories Serial position effect - answers Tendency to recall items at the beginning and end of a list Carol Gilligan's critique - answers Focuses on differences in moral development between genders Extinction criteria - answers CR occurs after CS but not after other stimuli

Sympathetic nervous system - answers Activated by sudden fear response Bandura's confidence concept - answers Self-efficacy belief in one's abilities Reciprocal determinism - answers Interaction between behavior, personal factors, and environment Self-determination - answers Sense of autonomy and control over one's actions Psychic determinism - answers Belief that all mental events have a cause Self-efficacy - answers Belief in one's ability to succeed in specific situations Phenomenology - answers Study of individual's subjective experiences and consciousness Cognitive labels of physiological changes - answers Schachter and Singer's theory on emotion generation Fundamental attribution error - answers Tendency to attribute others' behavior to internal traits Alcohol tolerance - answers Need to consume more alcohol for previous effects Dependent variable - answers Measured response in an experiment Phonemes - answers Basic sounds shared by all human languages Action potential - answers Sequence of electrical charge shifts in a neuron Biofeedback - answers Technique controlling involuntary physiological responses Conformity in perceptual judgments - answers Asch's findings on group influence in decision-making Heuristics - answers Mental shortcuts for efficient problem-solving Minnesota Multiphasic Personality Inventory - answers Assessment tool for clinical disorders Variable ratio - answers Partial reinforcement schedule resistant to extinction Conservation - answers Piaget's concept of understanding quantity remains constant Homeostasis - answers Tendency to maintain internal stability

Linguistic relativity hypothesis - answers Whorf's theory on language influencing thought Somatoform disorder - answers Condition showing physical symptoms without medical cause Incentive theory - answers Motivation influenced by rewards or punishments Procedural memory - answers Memory for automatic activities like bike riding Group polarization - answers Group decision-making leading to more extreme choices Broca's area - answers Brain region for speech production Aggression - answers Behavior showing most gender differences Availability heuristic - answers Mental shortcut basing judgments on easily recalled examples Drive-reduction theory - answers Motivation to reduce internal tension Reliability - answers Consistency of test scores Categorical data - answers labels, names, or numbers of a group Quantitative (numerical) data - answers numerical in nature; counts or measurements; have a unit and can be used arithmetically discrete - answers finite or countably infinite continuous - answers measurement of infinitely many outcomes nominal - answers unordered Example: Blood type ordinal - answers ordered Example: Pain Rating x - answers a variable to represent individual data points n - answers the number of data values in a sample (sample size) N - answers the number of data values in a population (population size) Mean ( ) - answers arithmetic averagex̄