# Difference between revisions of "Corrective self-explanation"

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## Brief statement of principle

Explaining how and why incorrect solutions are incorrect will help students to reject incorrect knowledge components and, thus, stop using incorrect strategies to solve problems.

Corrective self-explanation is a kind of error correction support which is a kind of instructional method.

## Description of principle

### Operational definition

Corrective self-explanation is self-explanations of incorrect worked examples; explaining how and why they are incorrect. See the study by Booth.

### Examples

Booth's Corrective self-explanation exercises:

## Experimental support

### Laboratory experiment support

Siegler (2002) found that having students self-explain incorrect answers as well as correct answers increased learning of mathematical equality problems than explaining only correct answers.

Siegler & Chen (in press) also found that asking children to explain both why correct answers were correct and why incorrect answers were incorrect was more effective for learning to solve water displacement problems than only requesting explanations of correct answers.

### In vivo experiment support

Preliminary results from Booth suggest that while completing any typical or corrective self-explanation exercises improve procedural performance for solving algebraic equations (Booth, Koedinger, & Siegler, 2007), corrective self-explanation may uniquely improve conceptual knowledge about features in the equations.

## Theoretical rationale

As a form of self-explanation, corrective self-explanation works via making knowledge explicit. Unlike typical self-explanation, however, corrective self-explanation focuses on making explicit 1) that a given knowledge component is wrong and 2) why the knowledge component is wrong (what features about the situation make the knowledge inappropriate.

## Conditions of application

1. Corrective self-explanation is likely only useful when students also recieve experience that will facilitate construction of correct knowledge components. If students recieve only corrective self-explanation, they may come to reject their incorrect knowledge components, but if they have nothing to replace them with, they will either flounder (having no way to solve the problem), or revert to use of the only strategy they know, even though they know it is incorrect.

2. Grosse & Renkl (in press) also show that explaining incorrect examples is difficult for poor learners if the step where the error occurred is not highlighted. If this is not made clear, students have difficulty detecting and explaining the error.

## References

Booth, J.L., Koedinger, K., & Siegler, R.S. (2007, October). The effect of corrective and typical self-explanation on algebraic problem solving. Poster presented at the Science of Learning Centers Awardee’s Meeting in Washington, DC.

Grosse & Renkl (in press). Finding and fixing errors in worked examples: Can this foster learning outcomes? Learning and Instruction.

Siegler, R. S. (2002). Microgenetic studies of self-explanations. In N. Granott & J. Parziale (Eds.), Microdevelopment: Transition processes in development and learning (pp. 31-58). New York: Cambridge University.

Siegler, R.S., & Chen, Z. (in press). Developmental Science.