In early 1900"s, intelligence scores of children were not recorded direcly, but rather put into a quotient (mental age = actual age x 100) 100 remains the average iq score: test- a standardized device designed to measure a person"s responses to specific stimuli (problems and questions) Standardization- the process of using a uniform, standard procedure. Norms- test scores and corresponding percentile ranks of a large, representative sample of individuals. Representative samples- a large sample of people that are representative of all people just like you, we only compare your score to people just like you: reliability- stability or consistency of a set of test scores. A test is said to be reliable if it yields about the same score for the same individual in repeated testing. Test-retest method- administer the same test to the same individual on two different occasions. Alternate forms- administer two different versions of the same test to the same individuals on two different occasions.