PSY-33 Lecture Notes - Lecture 8: Criterion Validity, Face Validity, Internal Consistency
Theories of Personality
Notes
Joseph Yang
● Personality assessment
○ The measurement of the individual characteristics of a person
○ May be used to develop models of disorder intervention programs, monitor
treatments, evaluate treatments and to make diagnosis
● Reliability
○ Prerequisite for validity
○ An estimate of how consistent a test is; a good test gives consistent results over
time, items or raters
○ Describes the extent to which test scores are consistent and reproducible with
repeated measurements
○ Temporal consistency reliability
■ Have students take tests a second time to see if their scores are similar
○ Test-retest reliability
■ Need to be careful the participants are not merely remembering what they
originally said in the first test-taking session
○ Internal consistency reliability
■ See if different items of the test give similar results
■ In earlier days, testing developers would make up two versions of a test
that were comparable and checked to see that the scores on the parallel
forms of them were similar
○ Parallel-forms reliability
■ Sometimes they would split a test in half and see if test-takers’ scores on
one half correlated with score on the other half
○ Cronbach’s alpha
■ The generalizability of the score form one set of items to another
○ Interrater reliability
■ Making sure our measures are reliable across multiple raters
■ To check, we might have two separate judges rate the personality or
behavior of a third person
■ Researchers will often calculate the average correlation among the scores
of all raters or the percentage agreement among raters
● Validity
○ The extent to which a test measures what it is supposed to measure
○ Construct validity
■ Must successfully measure the theoretical concept it was designed to
measure
○ Face validity
■ When it appears to measure the construct of interest
■ Not the most convincing type of validity
■ Important for personnel testing, or other situations where the cooperation
and motivation of the test-taker can affect the results of a test
○ Criterion validity
Document Summary
The measurement of the individual characteristics of a person. May be used to develop models of disorder intervention programs, monitor treatments, evaluate treatments and to make diagnosis time, items or raters. An estimate of how consistent a test is; a good test gives consistent results over. Describes the extent to which test scores are consistent and reproducible with. Have students take tests a second time to see if their scores are similar repeated measurements. Need to be careful the participants are not merely remembering what they originally said in the first test-taking session. See if different items of the test give similar results. In earlier days, testing developers would make up two versions of a test that were comparable and checked to see that the scores on the parallel forms of them were similar. Sometimes they would split a test in half and see if test-takers" scores on one half correlated with score on the other half.
