Psychology 2320A/B Chapter Notes - Chapter 4: Abecedarian Early Intervention Project, Concurrent Validity, Content Validity
Document Summary
Hypothesis testing: build knowledge systematically, one investigation provides evidence for/against, hypothesis that is supported serves as evidence for theory. Random selection: cannot study entire population, next best, choosing each participant by chance clinical populations can overrepresent youth who experience more serious symptoms, selection bias: important implications. Operational definition of behaviour or concept being studied: aggression operationalized as frequency with which children shove, depression operationalized by a score on scale that measures feelings. Exists if questionnaire gets at what is the underlying concept. Whether measure corresponds to construct (concept) underlying attribute: content validity. Content of measure corresponds to content of attribute face validity. Whether measure seems appropriate for attribute: concurrent validity. Scores on measure correlate with scores on another acceptable measure: predictive validity. Scores on measure predict later scores on another acceptable. Reliable measure: data = similar or consistent if measurements taken again under similar circumstances.
