Training Procedures and Task Difficulty in Brightness and Position Discriminations by Rats

This research concerned training procedures (correction vs noncorrection), type of discrimination task (position vs brightness), and task difficulty in two 2 × 3 experiments using rats in single-unit mazes. An interaction was found between type of training procedure and task difficulty for the brightness task, with noncorrection Ss requiring relatively fewer trials to reach a criterion than correction Ss as the task became more difficult. A statistically insignificant interaction was found for the position task.