Basic concepts of psychometric tests Flashcards
marked individual differences are normal due to (charles darwin)
-differences being adaptive- leaving to more complex intelligent individuals overtime
psychometrics
the field of study concerned with the theory and practice of psychological measurements
reliability
the extent ow which a test or measure produces the same scores when applied in the same circumstances
types of reliability
internal and external
internal reliability
extent to which a measure is consistent with itself
example of internal reliability
split half method
split half method
measures the extent to which all parts of the test contribute equally to what is being measured
external reliability
extent to which a measure varied from one use to another
external reliability
test-retest
inter-rater
external: test- retest
measures stability of the test over-time
external: inter-rater
the degree to which different raters give consistent estimates of the same behaviour
validity
degree to which a test measures what it purports to measure
types of validity
content related and criterion related
content related validity
appropriate content
types of content related validity
face validity
construct validity
face validity (content-related)
does the test appear to test what it claims to test
construct validity (content related)
does the test relate to underlying theoretical concepts
criterion related validity
relationship to other measures
concurrent validity (criterion related)
does it relate to an existing similar measure?
predictive validity (criterion related)
does the test predict later performance on a related criterion
