Which method is least likely to improve response accuracy in discrete trial teaching?

In discrete trial teaching, the effectiveness of teaching strategies can significantly impact a learner's response accuracy. The method identified as least likely to improve response accuracy is tedious repetition. While repetition can be beneficial for reinforcing learning, when it becomes tedious, it may lead to decreased engagement and motivation from the learner. This lack of interest can hinder the learning process and result in poorer response accuracy.

In contrast, fast-paced instruction can promote quick learning and maintain engagement if conducted appropriately. Errorless teaching minimizes the opportunity for the learner to make mistakes, thereby increasing confidence and helping solidify correct responses. Varying tasks and instructions can also enhance response accuracy by keeping the learner engaged and providing opportunities to generalize skills across different contexts. Thus, tedious repetition stands out as the least effective in fostering an environment conducive to accurate responding in discrete trial teaching.