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7. _______ reported using a "cricket" to train animals as early as 1951.
A. B. F. Skinner

B. Ivan Pavlov

C. Gary Wilkes

D. Sigmund Freud

I picked A

To check if your answer is correct, we need to look at the information provided in the question. The question asks who reported using a "cricket" to train animals as early as 1951. Let's go through the options:

A. B. F. Skinner: B. F. Skinner was a prominent psychologist known for his research in operant conditioning and behaviorism. He used various methods, including positive reinforcement, in animal training. Although he studied animal behavior extensively, there is no specific mention of him using a "cricket" in his training methods.

B. Ivan Pavlov: Ivan Pavlov was a Russian physiologist known for his experiments with dogs using the concept of classical conditioning. While he did use signals, such as a metronome or bell, to elicit conditioned responses in his dogs, there is no mention of him using a "cricket" in his research.

C. Gary Wilkes: Gary Wilkes is known as a professional dog trainer who popularized the use of clicker training in the 1990s. However, since the question specifies "as early as 1951," he would not be the correct answer.

D. Sigmund Freud: Sigmund Freud is a well-known psychologist, but his theories and work primarily focused on psychoanalysis and the study of human behavior, not animal training.

Based on this analysis, it appears that your answer, A. B. F. Skinner, may not be correct. I would suggest revisiting the options and reconsidering your answer based on the information provided.

Your answer is correct.

A. B. F. Skinner is the correct answer.