b. Thurstone (1930's - 1940's)maintained that intelligence is composed of several factors or abilities he called Primary mental abilities. He proposed seven such abilities. These included verbal comprehension, word fluency, numbers, space, associative memory, perceptual speed and general reasoning. In addition, e Thurstone noted that a person who was above average on any one of these abilities tended to be above average in the others. He concluded that intelligence is composed of seven factors and a general factor common to all the abilities mentioned.
cont.....with c.
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