PSYC 3250 Chapter Notes - Chapter 6: Reliability Engineering, Psychological Testing

• School: University of Guelph
• Department: Psychology
• Course: PSYC 3250
• Professor: David Stanley

Document Summary

Neither physical or psychological tests are completely consistent. On the other hand, most scores are not completely random. The reliability or consistency of test scores is critically important in determining whether a test can provide good measurement as they are used to make decisions about persons. Sources of consistency and inconsistency in test scores. Thordike, prepared a list of possible sources of validity in scores on a particular test (table 6. 1). Category 1: factors that affect test scores lists some lasting and general characteristics of persons. Category 2: lists lasting but specific characteristics of persons. Category 3: lists temporary but general characteristics of persons. Category 4: lists temporary and specific characteristics of persons. Category 5: lists some aspects of the testing situation that could lead to inconsistency in test scores. Category 6: lists some chance factors that may affect test scores. Hence, the first category is reliable while the other five are not.