Under the Structure of Intellect Model proposed by J.P. Guilford, what is the correct mathematical combination and psychological nature of the three interconnected sub-categories of intellectual abilities classified into Contents, Operations, and Products?

📌 Core Theoretical Concept:

The Structure of Intellect (SOI) model was proposed by the eminent psychologist J.P. Guilford. According to this model, human intelligence is conceptualized as a three-dimensional cubic framework comprising Contents, Operations, and Products. In Guilford's original formulation, the dimensions are structured into Contents (4 categories: Visual, Auditory, Symbolic, Semantic), Operations (5 categories: Cognition, Memory, Divergent production, Convergent production, Evaluation), and Products (6 categories: Units, Classes, Relations, Systems, Transformations, Implications). Multiplying these sub-categories mathematically yields 4 × 5 × 6 = 120 independent intellectual abilities. Therefore, option (a) provides the exact and correct mathematical combination representing Guilford's foundational model of intelligence.

📊 Key Exam Points:

• Tridimensional Model: Guilford rejected the unitary and general factor theories of intelligence, organizing mental abilities into a matrix of three interacting dimensions.
• Mathematical Formula: Contents (4) × Operations (5) × Products (6) = 120 factors in the original model, which was later expanded to 150 and 180 abilities in subsequent revisions.
• Divergent Production: Guilford's model is heavily associated with the study of creativity and divergent thinking processes in educational psychology.
• Distractor Analysis: Option (b) mentions 150 abilities (5×5×6) which reflects a later revision, but the classic and standard textbook representation for the foundational model remains 4 Contents, making (a) the accurate target answer.