Dr. Simpson's students were rightfully upset when he used very accurate weight scales (assessing the poundage of each pupil) to determine their grades in a developmental psychology class. This is partially because his method of assessment lacked
A) a sufficient sample size
B) reliability
C) validity
D) the ability to identify practice effects

Question

Quizplus · Accepted Answer

Dr. Simpson's method lacked validity because the assessment (weight of the students) does not measure what it is supposed to measure (knowledge or skills in developmental psychology). Validity refers to how well a test measures what it is purported to measure.

Dr Simpson's Students Were Rightfully Upset When He Used Very