Here are the key terms for this chapter.
- Between-groups design
- Between-subjects design
- Bimodal
- Binary variable
- Boredom effect
- Categorical variable
- Central tendency
- Concurrent validity
- Confounding variable
- Content validity
- Continuous variable
- Correlational research
- Counterbalancing
- Criterion validity
- Cross-sectional research
- Dependent variable
- Deviance
- Discrete variable
- Ecological validity
- Experimental research
- Falsification
- Frequency distribution
- Histogram
- Hypothesis
- Independent design
- Independent variable
- Interquartile range
- Interval variable
- Journal
- Kurtosis
- Leptokurtic
- Level of measurement
- Longitudinal research
- Lower quartile
- Mean
- Measurement error
- Median
- Mode
- Multimodal
- Negative skew
- Nominal variable
- Nonile
- Normal distribution
- Ordinal variable
- Outcome variable
- Percentile
- Platykurtic
- Positive skew
- Practice effect
- Predictive validity
- Predictor variable
- Probability density function (PDF)
- Probability distribution
- Qualitative methods
- Quantitative methods
- Quantile
- Quartile
- Randomization
- Range
- Ratio variable
- Reliability
- Repeated-measures design
- Second quartile
- Skew
- Standard deviation
- Systematic variation
- Sum of squared errors
- Tertium quid
- Test–retest reliability
- Theory
- Unsystematic variance
- Upper quartile
- Validity
- Variables
- Variance
- Within-subject design
- z-scores
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