Alfred said, “No!” to his mother, just as he had heard it said numerous times by her. “No” is one of the typical infant’s 50 ________ words

A positive consequence or presentation of a stimulus _____.

a. is about as effective as classical conditioning in changing behavior b. will likely have only a week effect in changing behavior

The difference threshold is also known as the ________

a. just noticeable difference. b. signal detection difference. c. absolute threshold. d. comparison threshold.