Psychology 2660A/B Lecture 6: Lecture 6 Assessment Methods for Selection & Placement

• School: Western University
• Department: Psychology
• Course: Psychology 2660A/B
• Professor: Laura Fazakas- De Hoog

Document Summary

Basic strategy in selection: predictors -> criteria (standards for success) E. g. typing test, simulation exercises: signs. Classical test theory where x = t + b + e: x = score on a measure, t = true score, b = systematic error (bias, e = random error, reliability: consistency in measurement. E. g. scale being consistently off 5 pounds. E. g. placement of scale changes its rating (1) temporal stability: consistency over time. Test-retest reliability coefficient (r) (2) alternate (parallel) forms: consistency across different forms of a measure. Alternate forms reliability coefficient (r) (3) internal consistency: consistency of content within a measure. Coefficient alpha (equivalent to average of all possible split halves) (4) inter-rater reliability: consistency across raters. Inter-rater reliability coefficient (r: validity: accuracy of inferences from scores on a measure (1) inference: scores on a measure reflect the level on an attribute.