As the text describes an operant conditioning test that used the head-turn procedure to study infant speech perception capabilities, it reveals that we need to reinforce a head turn response to new or changed sound.
In psychology, an operant conditioning refers to the type of an associative learning process through which the strength of a behavior is modified by reinforcement or punishment.
Even though an operant and classical conditioning both involve behaviors controlled by environmental stimuli, they still differ in nature. In the operant conditioning, the individual behavior is controlled by external stimuli.
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