Humans human 27 human experiment article 26 female 19 male 19 education 18 Female 15 Male 15 adult 13 questionnaire 13 controlled study 11 major clinical study 10 Adult 9 Surveys and Questionnaires 9 curriculum 8 psychology 8 dental education 7 procedures 7 statistics and numerical data 7 child 6 learning 6 Child 5 Cross-Sectional Studies 5 Reproducibility of Results 5 cross-sectional study 5 medical education 5 outcome assessment 5 quantitative analysis 5 reproducibility 5