Which principle suggests that a moderate amount of stress can enhance learning?

The Yerkes and Dodson Law is a principle from psychology that posits an optimal relationship between anxiety or arousal and performance. It suggests that a moderate level of stress or arousal can actually improve an individual's ability to learn and perform tasks. This relationship is often illustrated by an inverted U-shaped curve, where too little stress results in underperformance due to lack of motivation, while excessive stress can lead to anxiety and hinder performance. Therefore, the idea that a moderate amount of stress can enhance learning aligns directly with this principle, making it the correct answer for this question.

The other principles focus on different aspects of learning or cognitive processes but do not specifically address the impact of stress on learning performance. The Cognitive Load Principle deals with managing the information volume in working memory to optimize learning. The Processing Information Principle emphasizes how information is transformed and integrated into knowledge. The Metacognition Principle relates to understanding one's own learning processes and improving learning strategies. Hence, they do not encapsulate the concept of stress enhancing learning capabilities in the same way the Yerkes and Dodson Law does.