2. means does the test measure what it is suppose to measure
3. 3 Types of validitly 1. content validity evidence is established by inspecting test questions to see whether they correspond to what the user has on the test 2. Criterion Related Validity Evidence scores from a test are correlated with a external criterion----2 types-----concurrent (Measures that can be administered at the same time and Predictive(How ell the test predicts some future behavior
4. Reliability
5. means does the test yield the same or similar score rankings consistently
6. 3 types of reliability 1. Test Retest Estimates reliability- giving the test twice to the same group of individuals with a small time interval between tests 2. Alternate form estimates- giving two alternate or equal forms of the test to the same group and correlating their success 3. Internal Consistency- giving a test and making sure items correlate with each other
