Psych Ass: Test Flashcards
(38 cards)
Classical Test Score Theory
Assumes every person has a true score with no errors. Observed = True + Error
Domain Sampling Theory
Items selected from an infinite domain of choices
Domain Sampling
Choosing items appropriate for the domain
Domain Sampling Model
Considers using limited items for a larger construct
Item Response Theory
Focuses on difficulty, moving from easy to harder questions
Reliability
Scores are stable and consistent
Reliability Coefficient
Ratio of variance between true and observed score
Test-Retest Method
Considers consistency, administers the test in different occasions
Parallel Forms
Compares two equal forms of tests for the same attribute (different items, same difficulty)
Internal Consistency
Consistency with the same form & subset but different approach based on variability
Carry Over Effect
First session influences the score for the second session if tests are taken close together
Systematic Carryover
Affects all test takers equally, no net error
Split Half Method
Divided into halves scored separately
Split Half Reliability
Dividing sets of related items into two and comparing the results
Coefficient/Cronbach’s Alpha
Internal consistency of a scale (closeness of items to a group)
KR-20
Reliability of binary measurements (yes/no)
Kappa Statistics
Consistency between the agreement of different raters (observed - expected / 1 - expected)
Spearman-Brown Formula
Estimates the correlation between two halves
Low Alpha Level
Less information
Alpha Coefficient
Marks only the lower bound in reliability
KR-20
Considers all possible ways of splitting items
Kappa
Best used for assessing levels of agreement
Discriminability Analysis
Examines the correlation of individual items and total score
Validity
Agreement between a score and what is believed to measure