Louis L. Thurstone
Intelligence is a cluster of abilities.
Believed that there were different “primary mental abilities” each independent from the other.
Examples: Verbal Comprehension, numerical ability, reasoning & perceptual speed
The g factor was just an overall average score of these independent abilities.
Louis L. Thurstone
In 1938 Louis L. Thurstone proposed the Primary Mental Abilities theory. That was that there are seven independent primary mental abilities which constitute the human intelligence. These are the following:
1. Memory--the ability to memorize and recall
2. Word fluency--the ability to produce words rapidly
3. Reasoning--the ability to find rules
Louis L. Thurstone
4. Verbal comprehension--the ability to define and understand words
5. Space--the ability to visualize relationships .
6. Perception--the ability to see differences and similarities among objects 7. Number--the ability to solve arithmetic problems .