Moderate

According to Rescorla, the strength of a conditioned response depends on:

Correct answer: C. the percentage of trials in which the CS and UCS are paired

  • A. the number of trials in which the CS and UCS are paired
  • B. the number of trials in which the CS is presented alone
  • C. the percentage of trials in which the CS and UCS are paired
  • D. resistance of extinction

Explanation

Rescorla argued that conditioning depends on the predictive relationship, or contingency, between the CS and UCS rather than merely the number of pairings. Among these choices, the percentage of paired CS-UCS trials best represents that contingency.

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