psychological testing and assessment Flashcards
what does item response theory tell us
the probability of a response to a test item that measures the latent trait
what is IRF
item response function: the ability to differentiate those with/ without a trait
what 3 things determine IRF
item difficulty
item discrimination
susceptibility to false positives
what are the 3 assumptions of Response Theory
uni-dimensionality (measuring 1 trait)
local independence (generalisable to trait not to example)
monotonicity (predictable-ness)
what are 5 types of biases in tests
rating error leniency/ severity halo effect (wisdom and age) central tendency (no extremes) regression to the mean
2 dimensions of measurement theory
representation
uniqueness
what is transitivity
same order of relationships
what is the equation for classical test theory
test score = true score + error
interval scale is
order and size
ordinal scale is
only order
assumptions of classical test theory
large sample size = 0 error
errors don’t correlate with true scores
errors don’t correlate to variable
sources of error in classical test theory
item wording
variations in participant
test administation
tes scoring
internal consistency
homogeniety of items
12 assumptions in testing
the state exists can be quantified various approaches provides answers pinpoint phenomena various sources error strengths/ weaknesses predict non-test behaviour future behaviour fair unbiased benefits society
what is idiographic info
individual event
