PSY 3213C Study Guide - Midterm Guide: Fish Measurement, Intelligence Quotient, Internal Validity
Document Summary
Reliability: measures the same thing multiple times: ex: measurement error reduces reliability of a fish measurement, reliable when the same or similar results emerge every single time. Psychological measures: fish & ruler- you see the measurement on the ruler directly, psychological measures are invisible and abstract, example: intelligence, example: iq to measure intelligence- have to test this multiple times to see if it is reliable. *can"t trust intuition- it"s important to assess validity, but to be valid, something must first be reliable. Split-half reliability: a type of internal consistency reliability. When there is a correlation between average items on the 1st half of the test and the average items on the 2nd half, then the test is reliable. Split items in half and calculate the total of the score on the halves for each participant. Test-retest reliability: many participants, give each one test twice. If the scores are similar, the test is reliable.
