Final answer:
Novice learners benefit from larger summaries of feedback specifically when faced with complex tasks, helping them to understand and integrate new information, whereas experienced learners may not need extensive feedback for simple tasks.
Step-by-step explanation:
Research into the optimization of learning has shown that feedback delivery must be tailored to the level of the learner and the complexity of the task at hand. When considering which option is true regarding the summary size of feedback to optimize learning for different learners, the correct option is: Novice learners only benefit from larger summaries of feedback when the task is complex. Novice learners need more comprehensive feedback when dealing with complex tasks as it aids their understanding and helps them integrate new information into their learning process. In contrast, experienced learners may not require extensive summaries because they already have a framework within which to fit new information. Additionally, larger summaries of feedback may be overwhelming and less beneficial for experienced learners, particularly if the tasks are simple and well within their realm of expertise.