Theories of Intelligence

 

📘 10.2 Theories of Intelligence

Covers: Spearman, Thurstone, Guilford, Vernon, Sternberg, J.P. Das

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🔹 1. Spearman’s Two-Factor Theory (1904)

📌 Core Idea:

• Intelligence consists of two factors:
  • g: General Intelligence (common to all tasks)
  • s: Specific Intelligence (unique to each task)

🧠 Example:

• A student who performs well in math (high s) and also does reasonably well in writing essays may possess strong g.

✅ UPSC Angle:

• g is useful in GS paper solving; s could be ethics writing or logical reasoning.

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🔹 2. Thurstone’s Primary Mental Abilities (1938)

📌 Core Idea:

• Rejected g. Proposed 7 independent abilities:
  1. Verbal comprehension
  2. Numerical ability
  3. Spatial relations
  4. Perceptual speed
  5. Word fluency
  6. Memory
  7. Inductive reasoning

🧠 Example:

• An architect = high in spatial + perceptual speed.
• A CSE aspirant = high in verbal, memory, and reasoning.

✅ Real-life Use:

• Common basis for aptitude batteries and job selection tests.

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🔹 3. Guilford’s Structure of Intellect Model (1955)

📌 Core Idea:

• Intelligence = 3 dimensions:
  1. Operations (e.g., cognition, memory)
  2. Contents (e.g., visual, auditory, symbolic)
  3. Products (e.g., units, relations)

🔸 Result = 5 × 6 × 5 = 150 types of intelligence

🧠 Example:

• A film editor may use symbolic content + evaluation operation + transformation product.

✅ Practical Relevance:

• Encourages creative assessment over single-score IQ.

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🔹 4. Vernon’s Hierarchical Theory (1950)

📌 Core Idea:

• Intelligence has a hierarchy:
  • g (General ability)
    • Major group factors:
      • Verbal-Educational
      • Spatial-Mechanical
    • Minor group factors
    • Specific factors

🧠 Example:

• A student good at languages may score high in Verbal-Educational factor but low in Spatial-Mechanical.

✅ Practical Relevance:

• Used in education to stream students into STEM or humanities.

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🔹 5. Sternberg’s Triarchic Theory (1985)

📌 Core Idea:

Intelligence = 3 components:

Component	Description	Example
Analytical	Problem-solving, academic tasks	Solving UPSC CSAT questions
Creative	Adaptation to new situations	Writing original essays in UPSC
Practical	Street-smartness, applying knowledge	Handling field issues as a DM

✅ UPSC & Governance Use:

• Analytical = mains GS
• Creative = essay
• Practical = administration

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🔹 6. J.P. Das’ PASS Model (1994)

📌 Core Idea:

• Based on Luria’s neuropsychological theory
• Intelligence has 4 components:
  1. Planning (goal setting, problem-solving)
  2. Attention (focus and resistance to distraction)
  3. Simultaneous Processing (seeing patterns/relationships)
  4. Successive Processing (sequencing information)

🧠 Example:

• Reading comprehension uses:
  • Attention → reading
  • Simultaneous → grasp paragraph structure
  • Successive → process sequence of ideas
  • Planning → answering questions

✅ Relevance:

• Used in DAS-Naglieri Cognitive Assessment System (CAS) test, especially for learning disabilities.

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🧾 Comparative Summary Table

Theory	Key Feature	Relevance
Spearman	g + s factors	Basis of IQ tests
Thurstone	7 primary abilities	Aptitude testing
Guilford	150 factors, 3D model	Creativity, innovation assessment
Vernon	Hierarchical levels	Educational streaming
Sternberg	Analytical, creative, practical	Holistic evaluation in UPSC/life
J.P. Das	PASS model (neuro-cognitive)	LD diagnosis, Indian education

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🧠 Indian Perspective

• J.P. Das’ PASS model is India’s major contribution to intelligence theory.
• Focuses on cognitive education and has practical relevance for school reforms like NEP 2020.

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🏛️ Governance Example

A District Magistrate (DM) must:

• Use analytical intelligence to understand local laws
• Apply practical intelligence to implement them effectively
• Exhibit planning and attention (PASS model) to prioritize public service delivery

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✍️ Model Answer Structure (10-Marker)

1. Define intelligence broadly.
2. Explain at least 4 theories with unique features.
3. Add comparative insights or diagrams.
4. Use UPSC/govt examples.
5. Conclude with relevance in 21st-century assessments.

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📌 Visual Summary

Theories of Intelligence
├── Spearman: g + s
├── Thurstone: 7 PMAs
├── Guilford: 3D Model → 150
├── Vernon: Hierarchy
├── Sternberg: Triarchic (A, C, P)
└── J.P. Das: PASS (Planning, Attention, Simultaneous, Successive)

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