Analysis of Assertion (A) and Reason (R)

This question requires evaluating two statements about classical conditioning.

Evaluating Assertion (A)

• Assertion (A) states that conditioning fails if the unconditioned stimulus (US) and conditioned stimulus (CS) are paired randomly.
• Classical conditioning requires a predictable relationship (contingency) between the CS and the US. The CS should reliably signal the impending occurrence of the US.
• Random pairing means the US appears unpredictably, regardless of the CS. This prevents the learner from establishing a consistent association or expectation.
• Therefore, Assertion (A) is true. Conditioning is significantly impaired or fails under random pairing conditions.

Evaluating Reason (R)

• Reason (R) suggests that cognitive processes, such as expectation, play a crucial role in classical conditioning.
• Modern theories of classical conditioning emphasize that it's not just about the temporal association (contiguity) but also about the organism's ability to predict events.
• The formation of an expectation – anticipating the US following the CS – is a key cognitive component. Research by Leon Kamin and Robert Rescorla demonstrated the importance of contingency and blocking, which rely on predictive relationships and cognitive processing.
• Therefore, Reason (R) is true.

Relationship Between (A) and (R)

• The failure of conditioning in random pairing (A) occurs precisely because the random nature of the stimuli prevents the formation of a reliable expectation (R).
• When the CS does not reliably predict the US, the cognitive process of expectation cannot be established, leading to a lack of conditioning.
• Thus, the role of cognitive processes involving expectation correctly explains why random pairing leads to conditioning failure.

Conclusion

Both Assertion (A) and Reason (R) are true, and Reason (R) provides the correct explanation for Assertion (A).