Population, sample A population is the universe of cases to which an investigator wants to generalize results. A sample is a subset of a population and corresponds to the people in the study. Primacy, recency Primacy effects occur at the beginning of a sequence. Recency effects occur at the end of a sequence. Reliability, validity Reliability refers to how dependably a data collection technique measures something.
Validity refers to how well the technique measures what it claims to measure.
Repression, suppression Repression occurs when one's thoughts or feelings are unconsciously removed from awareness. Suppression occurs when a thought or feeling is consciously put out of one's present awareness. Significant A statistically significant result enables an investigator to reject a null hypothesis. Do not use the word to refer simply to any result that you think is important. A state is a temporary mood.