Presentation on theme: "CLASS 11. INTELLIGENC E Anything that exists, exists in some amount. And all amounts can be measured. Thorndike, 1955 Psychological Measurement."— Presentation transcript:
Anything that exists, exists in some amount. And all amounts can be measured. Thorndike, 1955 Psychological Measurement
Qualities of a good test Reliability Validity Standardization
1. Reliability are scores consistent? Test-retest Internal consistency Inter rater consistency
Typical test-retest reliabilities: AFTER SIX MONTHS: Personality tests:. 75 -.85 Intelligence tests:.85 -.95 Height with tape measure:.98
2. Validity Does it Measure what it’s supposed to ? Content validity Predictive validity Construct validity
Eg ‘good driver’ test What is the concept ? How to operationalize ?
3. Standardization -ensures fair comparisons -norms based on large samples
Susceptible to Faking? Personality tests Can fake-good or fake-bad Intelligence tests Can’t fake good
Other Response Biases Acquiescent responding Extreme responding Random responding
INTELLIGENCE How to conceptualize it? How to operationalize it?
Conceptualizing intelligence ( 3 approaches ) 1. PSYCHOMETRICS - measuring the mind Spearman Factor g (general intelligence) Factor s Special talents (music, mechanical)