Data collection and procedures
Nine categories of data were collected, the first three in a waiting room before the clinical examination (child questionnaire, parent questionnaire, and saliva sample), the next three in the operatory room (compliance, skin conductance, and heart rate variability), and the last three in the waiting room following the clinical examination (child‐questionnaire, parent questionnaire, and saliva sample) (Table Study progress and data collection (9 categories of data)Previsit TKNN/IKO research clinicRecruitmentThe child and the parent or guardian were greeted by the principal investigator (A. M. G.) and the examining clinician (K. C. or E. L.) in an empty waiting room, explaining the procedures and answering questions. The parent/guardian completed the CFSS‐DS questionnaire while the child completed the happy‐sad‐face diagram and provided a saliva sample. At the first clinical visit, the study participant selected and opened the opaque envelope containing the study arm allocation.