I didn't do very well in the exam, and so I’m afraid of ____.

A．scolding

B．to be scolded

C．being scolded

D．scolded

当特定行为发生时，一个令个体厌恶的刺激便被撤除，从而导致该行为发生频率增多，称此现象为

A．正强化

B．消退

C．负强化

D．惩罚

E．刺激