In his study of IQ tests scores for different populations over the past sixty years, James R. Flynn discovered that IQ scores increased from one generation to the next for all of the countries for which data existed. This site attempts to explain the issues involved in a way that will better help you to understand the Flynn Effect. This new method is called the Implicit Association Test, or IAT for short. This is a complete lecture on tests and measurements. The lecture goes from the basic terminology of tests and measurements to their application and interpretation.
Psychometric testing falls into three main types of tests.
They are ability, personality, and aptitude tests.