PSYB01H3 Chapter Notes - Chapter 5: Construct Validity, Operational Definition, Face Validity
Document Summary
Detailed research on reliability and validity is often carried out on self-report measures of personality and individual differences: often use self-report measures to study psychological attributes e. g. iq, abilities, potential. Measures are used to make better clinical diagnoses, career-choice decisions, hiring decisions. It is wise to use existing measures of psychological characteristics rather than develop your own. Be able to compare your findings with prior research that uses the measure. Reliability - consistency or stability of a measure of behavior. A reliable measure does not fluctuate - yield the same result each time you administer a test on the same person e. g. iq test. Any measure comprises of 2 components: (1) true score - the person"s real score (2) measurement error - the extent that a measure is unreliable. A reliable test will have a diagram of scores that are concentrated in the middle of a normal distribution. Thus if measure is reliable, single administration should closely reflect true score.
