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THE PROBLEM 10 Flo. 4.-Variation of the influence of fatigue on the number of problemg worked correctly by individual pupils. SUMMARY1. The influence of fatigue upon the speed of work was approximately the same for the brighter as for the duller pupils.2. The influence of fatigue upon the scores was greater for the brighter than for the duller pupils.3. The influence of fatigue can be partly removed by presenting a challenging stimulus.4. A twenty-minute period of rest and recreation was sufficient for the pupils to throw off much of the fatigue resulting from the two hours of continuous work.5. The influence of fatigue was larger on the speed of work than on the average scores obtained in the different tests.

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