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Comprehension features (11 features).
| Average accuracy: Proportion of questions that were answered correctly (1 feature). |
| Question correctness: For each of the five questions, a binary-valued feature indicating whether the question was answered correctly or incorrectly (5 features). |
| Question response time: For each of the five questions, the time (in ms) taken for the participant to read and respond to the question (5 features). |
