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However, it still helps to shed light on the relative difference in difficulty between the two tasks-it is much harder to gain any improvement for the unemployment setting than for the flu setting.
If many subjects had resorted to guessing in order to finish quickly, this would have reduced the effect that any inherent differences in difficulty between the two tests would have had on the results.
The differences in item difficulty between the two groups varied between 0.26 and 1.26 logist, which is approximately 0.5 to 2.3 times the standard deviation of the latent variable (GermanySD = 0.84, SwitzerlandSD = 0.54).
One student who received a 2400 may have missed five questions, while another perfect scoring student may have missed only two, based on the designated variance in difficulty between the two test editions.
To control for the difference in task difficulty between the two tasks, the average RT of each participant within each task was taken as an index of task difficulty and entered into the paired t-test analysis as a covariate.
To standardize for the possible difference in difficulty between the two tests, 11 General Internal Medicine trainees, not involved in the PDA study, wrote both the tests.
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These estimations, however, are based on raw means and may be biased due to differences in difficulty between the three SP cases.
All these books contain vivid accounts of the difficulties between the two men and their respective camps.
Management and labor people readily talked about difficulties between the two, though Selig said he was not aware of any.
Some of the best drivers who race in both series did not compete in Montreal because of travel difficulties between the two events, although others dashed between the two tracks on private jets.
Miss Hanson demanded that Mr. Roth return $850 in security she had given him in April, but he had refused, and the dispute apparently was the culmination of the difficulties between the two.
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