Psychometrics — definition?
Measurement of psychological attributes.
Test Mental — role?
Assess individual sensory-motor differences.
Classical Test Theory — key assumption?
Observed score = True score + Error.
Optimal performance tests — purpose?
Measure maximum ability.
Response formats for typical tests?
Binary choices, ordered categories.
Item difficulty index — what?
Proportion answering correctly.
Item discrimination index — purpose?
Differentiate high and low scorers.
Classical Test Theory reliability methods?
Parallel forms, test-retest, internal consistency.
Sources of measurement error?
Transient, specificity, random errors.
Increase reliability — method?
Add items, standardize procedures.
Item analysis — indices?
Difficulty, discrimination, validity.
Reliability — definition?
Consistency of test scores.
Item validity index — purpose?
Predictive accuracy with external criteria.
Test construction — key guideline?
Align items with content and objectives.
Strategies to improve reliability?
Increase items, control administration, refine items.
Speed vs power tests — difference?
Speed emphasizes quickness; power measures max ability.
Test your knowledge with 8 questions on Psychometric Foundations and Test Reliability.
1. How do Classical Test Theory and Item Response Theory primarily differ in their approach to psychometric measurement?
2. What are the typical response formats used in optimal and typical psychological tests?
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