Psychometrics:This is the field of study concerned with the theory and technique of psychological measurement, which includes the measurement of knowledge, abilities, attitudes, and personality traits.
Stanford-Binet Test:An adaptation by Lewis Terman at Stanford University of Alfred Binet's original intelligence test. It measures cognitive abilities and provides an "intelligence quotient" (IQ).
Developmental Psychology:This branch of psychology studies physical, cognitive and social change throughout life span. It's relevant because it deals with how people grow and develop over time - something that IQ tests like those developed by Binet aim to measure.