Pavlov initially set out to study the _____ of his dogs.

• A. brain activity
• B. digestive systems
• C. circulatory systems
• D. social behavior

Answer: (B)

Verified step by step guidance

1. Understand the context of the problem: Ivan Pavlov was a Russian physiologist known for his work in classical conditioning. However, his initial research focus was not on conditioning.
2. Identify the options provided: The problem gives four options - brain activity, digestive systems, circulatory systems, and social behavior.
3. Recall Pavlov's background: Pavlov was originally interested in physiology, particularly the processes related to digestion.
4. Connect Pavlov's research to the options: Pavlov's famous experiments with dogs, which led to the discovery of classical conditioning, were initially part of his study on the digestive systems of dogs.
5. Conclude by selecting the correct option: Based on the historical context, Pavlov initially set out to study the digestive systems of his dogs.