Step 1: Understanding the Concept:
Intelligence tests are classified into three types based on the medium of instruction and response:
1. Verbal Tests: These require the use of language for both the examiner's instructions and the subject's responses (e.g., vocabulary tests).
2. Non-verbal Tests: These use pictures or geometric figures but still involve paper-and-pencil tasks (e.g., Raven’s Progressive Matrices).
3. Performance Tests: These require the subject to physically manipulate concrete objects or materials to solve a puzzle or complete a design.
Step 2: Detailed Explanation:
The Kohs Block Design Test is a classic subtest of many major intelligence batteries (like the Wechsler scales).
In this test, the examinee is given a set of small wooden blocks with different colored sides. They are shown a pattern on a card and must physically arrange the blocks to match that pattern.
Key characteristics:
- It is timed (requires speed and accuracy).
- It measures spatial visualization and motor coordination.
- It minimizes the role of language, making it useful for children or people from different cultural backgrounds.
Comparison of options:
(A) Performance test: This is the primary classification. Since it involves "performing" a physical task with blocks, it fits the definition perfectly.
(B) Non-verbal test: While it is indeed non-verbal, "Performance test" is a more specific and accurate category for tasks involving three-dimensional object manipulation.
(C) Verbal test: Incorrect, as no verbal response is needed.
(D) Aptitude test: While it can measure spatial aptitude, it is primarily categorized as an intelligence test measuring "Performance IQ."
Step 3: Final Answer:
Because the task requires physical manipulation of wooden blocks to recreate a visual pattern, the Kohs Block Design Test is classified as a Performance test.