According to Freud, what part of the mind operates on the pleasure principle and seeks immediate satisfaction?

________ are consequences that alter the likelihood of behaviors

a. Conditioned and unconditioned reflexes b. Successive approximations c. Rewards and punishments d. Conditioned and unconditioned stimuli e. Discrimination and generalization

According to the text, symptoms of _____ include fatigue, irritability, and difficulty sustaining attention

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