PSYCH-220 Lecture Notes - Lecture 6: Factor Analysis, Content Validity, Face Validity
20 Jun 2020
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Objective tests: items are still not absolutely objective. Validity and the subjectivity of test items. Some subjectivity in interpretation of meaning may be good. Based on theory, but sometimes less systematic. Items mean same thing to test taker and creator. Willingness to make an accurate and undistorted report. Items must be valid indicates of the construct. Reduce list of traits to an essential few. Administer these items to a large number of people. Consider what the items that group together have common and name the factor. The quality of information from the factor analysis is limited by the quality of items. Difficulty and subjectivity of deciding how items are conceptually related. Assumption- certain kinds of people answer certain questions in distinctive ways. Administer items to people already divided into groups. Compare the answers of the different groups. Not based on theory; ignores item content. Implications of ignoring item content, or low face validity.
