PSYC 111 Lecture Notes - Lecture 21: Content Validity, Longitudinal Study, Standardized Test
10 Nov 2016
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Because scores become meaningful only when they can be compared with others" performance, they must be defined relative to a pretested group, a process called standardization. Group must be representative of those who will be taking the test in the future. Standardized test results typically form a normal distribution, a bell-shaped pattern of scores that forms the normal curve. Most scores cluster around the average, and increasingly fewer are distributed at the extremes. Past several decades the average score has risen, a phenomenon known as the flynn effect. New zealand researcher james flynn first calculated its magnitude. Average person"s intelligence test score in 1920 was, by today"s standard, only a 76 it is a mystery. Supports the need for ongoing standardization/updating normative samples the extent to which a test yields consistent scores. Consistency may be assessed by comparing scores on two halves of the test (split-half), on alternative forms, or on retesting (test-retest)
