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AP Psych Barrons

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Methods<br />

CH<strong>AP</strong>TER 2<br />

KEY TERMS<br />

Hindsight bias<br />

Applied research<br />

Basic research<br />

Hypothesis<br />

Independent variable<br />

Dependent variable<br />

Theory<br />

Operational definition<br />

Validity<br />

Reliability<br />

Sampling<br />

Sample<br />

Population<br />

Representative sample<br />

Random sampling<br />

Stratified sampling<br />

Experiment—laboratory and field<br />

Confounding variables—participant and situation-relevant<br />

Random assignment<br />

Controls Group-matching<br />

Experimenter bias<br />

Double-blind procedure<br />

Single-blind procedure<br />

Response or participant bias<br />

Social desirability<br />

Hawthorne effect<br />

Placebo method<br />

Correlations—positive and negative<br />

Survey method<br />

Response rate<br />

Naturalistic observation<br />

Case study method<br />

Descriptive statistics<br />

Frequency distribution<br />

Measures of central tendency—mean, median, mode<br />

Extreme scores or outliers<br />

Positive versus negative skew<br />

Measures of variability—range, standard deviation, variance<br />

z score<br />

Normal curve<br />

Correlation coefficient<br />

Scatter plot<br />

Line of best fit/regression line<br />

Inferential statistics<br />

Sampling error<br />

p value<br />

Statistical significance<br />

Institutional Review Board (IRB)

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