15. Why are worked examples effective according to cognitive load theory?
Answer: C
Worked examples are effective because they reduce mental demands by modeling each step of problem-solving.
Worked examples are particularly effective in reducing cognitive load as they provide a clear model of the problem-solving process, allowing learners to focus on understanding rather than managing multiple cognitive tasks simultaneously.
A) They reduce the need for guided practice or feedback.
This option is incorrect because while worked examples can provide some level of guidance, they do not eliminate the need for practice or feedback. In fact, guided practice often follows the use of worked examples to reinforce learning and ensure understanding.
B) They introduce complex tasks to challenge students early in instruction.
This option is misleading as worked examples typically simplify the learning process rather than introduce complexity. By breaking down tasks into manageable steps, worked examples ensure that learners are not overwhelmed and can build their knowledge progressively.
C) They reduce mental demands by modeling each step of problem-solving.
This option is correct because worked examples lay out the problem-solving process in a clear and systematic way, which helps to minimize the cognitive load on learners. This allows them to concentrate on understanding strategies instead of struggling with the mechanics of problem-solving.
D) They promote independent discovery without structured support.
This option is incorrect as worked examples are designed to provide structured support rather than promote independence. They guide learners through the problem-solving process, which is contrary to the idea of fostering independent discovery without assistance.
Conclusion
In summary, the effectiveness of worked examples lies in their ability to reduce cognitive load by clearly modeling the steps involved in problem-solving. Options A, B, and D fail to capture this essence, while C accurately reflects the core principle of cognitive load theory that underpins the use of worked examples in instructional settings.