I am doing a study on the different facets of metacognition and plan to measure metacognitive skills through eye tracking. The reference task is going to be a problem verification task (subjects view math equations and are asked to answer whether the result is correct or not). Given the fact that eye tracking has not been studied extensively on this specific topic, are there any recommendations on which indices to use for each metacognitive skill? I was thinking the following: Prediction: Number and duration of fixations (more=harder) +prediction of solvability Confidence Judgements?

Planning: Number of fixations in relevant AOI's (e.g. the operator)

Evaluation: Number of regressions to and from solution

Monitoring: prolonged fixations or fixation clusters

Any input would be greatly appreciated, thank you for your interest and time!

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