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Internal consistency was evaluated with item to own scale correlations and Cronbach's alpha.
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Internal consistency was evaluated with item-to-item and item-total correlations using the Kuder-Richardson (KR20) method [ 22].
The associations between items were evaluated with inter-item correlations while the associations between items and scales were evaluated with item-total correlations corrected for overlap.
Fit of items and persons were evaluated with item-trait interaction with standardised mean person and item fit.
Internal consistency among sets of items was evaluated with item-total correlations and the Cronbach α coefficient.
The five components of the curriculum were evaluated with 30 item pre-, post-, and 1-year follow-up test instruments to assess the participants': (1) self-reported learning behaviors, (2) abilities to generate clinical questions from a clinical scenario and to describe a strategy for answering those questions, and (3) self-efficacy to perform specific self-directed learning behaviors.
The severity of depression was evaluated with 15-item Geriatric Depression Scale.
Breast cancer concern was evaluated with two items that inquired the frequency of worry and its effect on the daily life of the woman.
The scree plot indicated a 3- or 4-factor solution, and these factor solutions was explored, with item performance iteratively evaluated with removal of items conducted in a step-by-step process.
A high degree of internal consistency was obtained for each factor α = 0.92 (CI95 % 0.91 to 0.95) and 0.82 (CI95 % 0.76 to 0.86), The test-retest reliability was also evaluated with ICC, with an item ranging from 0.89 to 0.93.
Depression was evaluated with the 15-item Geriatric Depression Scale (GDS-15), which was especially designed to screen for depression in an older population [ 15].
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com