Step 1: Understanding the Concept:
Louis Leon Thurstone was an American pioneer in the fields of psychometrics and psychophysics.
He proposed the Theory of Primary Mental Abilities (PMA) as a challenge to Spearman's Two-Factor Theory.
Thurstone argued that intelligence is not a unitary trait but rather a set of seven independent abilities that operate together.
His research involved administering 56 different tests to students and identifying seven primary factors through complex factor analysis.
Step 2: Detailed Explanation:
Thurstone’s seven primary mental abilities are:
1. Verbal Comprehension: Understanding the meaning of words and concepts.
2. Word Fluency: The ability to think of words rapidly (e.g., rhyming or solving anagrams).
3. Number Ability: Speed and accuracy in arithmetic calculations.
4. Spatial Relations: The ability to visualize and manipulate objects in three dimensions.
5. Associative Memory: The ability to recall information previously learned.
6. Perceptual Speed: The ability to quickly and accurately identify visual similarities and differences.
7. Inductive Reasoning: The ability to find a general rule from specific instances or patterns.
Evaluating the options:
(A) Word Fluency is clearly on the list.
(B) Perceptual Speed is a primary ability.
(D) Inductive Reasoning is a primary ability.
(C) Emotional Reasoning is the odd one out. The concept of "Emotional Intelligence" or "Emotional Reasoning" was not part of the psychological discourse in the 1930s when Thurstone developed his theory.
Emotional Intelligence only became a major focus in the 1990s with the work of Salovey, Mayer, and Goleman.
Step 3: Final Answer:
Emotional Reasoning is NOT one of Thurstone’s Seven Primary Mental Abilities.