The basic ideas of connectionism theory of learning are .

A. all learning were the processes to establish the direct connection between stimulus (S) and response (R) through conditioning;
B. Learning was to acquire expectancy through insight and comprehension, rather than to acquire habits through practices and reinforcement;
C. Reinforcement played an important role in S-R connection establishment, during which individual learned the habit, which was the result of repeated practice and reinforcement;
D. Once the habit formed, when the original or similar stimulus situation emerged, the learned habitual response would appear automatically.
E. The present learning of organism depended on the cognitive structure in its long-term memory and the present stimulus situation.