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To detect a difference of one correct answer between the two didactic methods with a strength of 0.8 and α<0.05, it was necessary to include 74 participants in each group.
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The survey did not show any statistically significant differences in the answers between the two groups (surgeons vs. orthodontists), but it pointed that a considerable part of Italian practitioners still think that crowding is linked to the third molar eruption.
The overall proportion of coherent answers between the two questions was 93%.
Paired sample t-test was used to compare differences in the system usability and tool usefulness survey answers between the two sessions.
Binominal confidence intervals were used to compare percentages of positive answers between the two groups such as percentages of eye- and foot-examinations.
As expected, because in the third round only the graphs with a high variability of answers between the two first rounds were presented to experts, the mean IQR was higher for the third round (mean IQR = 2.1).
If a difference in the percentage of correct MCQ answers between the two groups (ISS and OSS) was 17%, then 64 participants had to be included to be able to reject the null hypothesis with a power of 80%.
When analyzing collected data, as in the present study, it is important to match same child same parent since merely report frequency in answers between the two groups may possibly disclose false agreements.
The goal of this study was not to compare participant answers between the two sites but rather to characterize a wide range of attitudes toward the proposed Push-Pull strategy.
Although the negative-voiced questions always took longer to answer, the difference in answer times between the two question types yielded a "relatively pure measure of speed of thought" at different times throughout the study, says Monk.
This may be assessed from table 5, which shows the estimated probability of each answer in the intervention groups for those outcomes showing a significant difference in answer profiles between the two groups.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com