Who among the following is generally credited with the first systematic investigations into classical conditioning?
A) ?Ivan Pavlov
B) ?B. F. Skinner
C) ?E. B. Twitmyer
D) ?Clark Hull
A
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Hannah is suspicious and doubts the loyalty of even her friends. She is unwilling to forgive perceived insults and never lets go of a grudge. She is most likely to be diagnosed with __________ personality disorder.
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