Discuss the theories of the intelligence …

The theories are grouped into four major theory types: (1) psychometric theories; (2) cognitive theories; (3) cognitive-contextual theories; and (4) biological theories. Psychometric theories derive from studying individual differences in test performance on cognitive tests. Louis Leon Thurstone proposed theory in 1930's that intelligence is composed of several different factors. The seven primary mental abilities in Thurstone's model were verbal comprehension, word fluency, number facility, spatial visualization, associative memory, perceptual speed and reasoning. The three main ways of measuring intelligence: psychometrics, information processing and cognitive structural approaches.

Psychometric theories are based on a model that portrays intelligence as a composite of abilities measured by mental tests. To identify the underlying sources of these performance differences, Spearman devised factor analysis, a statistical technique that examines patterns of individual differences in test scores. The theories are grouped into four major theory types: (1) psychometric theories; (2) cognitive theories; (3) cognitive-contextual theories; and (4) biological theories. Psychometric theories derive from studying individual differences in test performance on cognitive tests.