PSY 235 Chapter Notes - Chapter 2: Discriminant Validity, Content Validity, Takers
Document Summary
Subjective assessment: measurement relies on interpretation (unlike objective assessment, weaknesses, different observers make different judgments, strengths, complex phenomena may be examined and valuable insight gained. Reliability (1: the consistency of the scores that are expected to be the same, test-retest reliability, measure of consistency over time. Correlation between 2 halves of a test: cronbach"s coefficient alpha. The average of all possible split half correlations. Validity (2: criterion- related validity, the measure can predict important outcome criteria, content validity, the measure contains items that represent the entire domain of the theoretical construct. Items should be inter-correlated: but not so highly that it is redundant, total score of assessment should have a normal distribution, avoid ceiling and floor effects, sensitive to variability across the range of scores. Response sets (1: a bias in responding to test items that is unrelated to the personality characteristic being measured, acquiescence response set. Yes, agree, true of me : social desirability response set.
