[单项选择]

In some early attempts by psychologists to describe the basic learning process, the terms ’stimulus’, ’response’ and ’reinforcement’ were introduced. In an educational setting, these (1) could be defined as follows. When a teacher gives an (2) , or sets a problem, or asks a question, the pupil (3) in some way, and the teacher then tells the pupil if he has responded correctly. The teacher’s first action is called the (4) . The pupil’s action, carrying out the instruction, or solving the problem, or answering the question, is (5) the response. When the teacher tells the pupil his response is (6) , the bond between the stimulus and the response is strengthened and reinforcement is positive. If the response is incorrect, the bond is weakened, and reinforcement is (7)
Some psychologists laid great (8) on the importance of reinforcement for continued learning. They (9)
A. however
B. therefore
C. furthermore
D. otherwise