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The construct validity and the reliability of the questionnaires of the study were examined through conducting a pilot study with a sample of 30 questionnaires completed by participants at some available language institutes in Shiraz (Rahimi et al. 2014).
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The administration of questionnaires for the study will be synchronized with this monitoring.
RV wrote the baseline questionnaire of the study and the draft of the manuscript, and will run the study.
In the cases examined in this paper, the multidimensional questionnaire of the study was answered exclusively by the children's mothers.
The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1472-6920/14/44/prepub Authors would like to thank all medical students who participated in filling the questionnaire of the study.
Selective withdrawal might occur in case of the self-administered survey questionnaire or the questionnaires of the cohort study.
The design of the questionnaire for the study was largely based on previous research on doctors [ 8, 29, 30].
This could be of influence on their responses to the questionnaires of the current study.
The effect sizes (Cohen's d) from past sleep programs using the sleep questionnaires of the current study (the PSQI and ISI) has ranged from 0.35 – 0.88 [ 50].
Thirty-five patients (100% of the patients invited to complete the evaluation questionnaire, 65% of the study population) responded to the evaluation questionnaire.
In the questionnaire portion of the study, however, only two factors emerged as the primary factors in their choice: career options and being good at math and science.
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