no. correct, no extra words, first presentation
no. correct, helpful extra words, first presentation
no. correct, unhelpful extra words, first presentation
no. correct, no extra words, second presentation
no. correct, helpful extra words, second presentation
no. correct, unhelpful extra words, second presentation
no. extra words requested, helpful
no. extra words requested, unhelpful
time to request extra words, helpful
time to request extra words, unhelpful
total time, no extra words, first presentation
total time, helpful extra words, first presentation
total time, unhelpful extra words, first presentation
total time, no extra words, second presentation
total time, helpful extra words, second presentation
total time, unhelpful extra words, second presentation
proportion correct, no extra words, first presentation
proportion correct, helpful extra words, first presentation
proportion correct, unhelpful extra words, first presentation
proportion correct, no extra words, second presentation
proportion correct, helpful extra words, second presentation
proportion correct, unhelpful extra words, second presentation
total no. correct, second presentation
total no. correct, first presentation
group by performance on first presentation