The research team had expectations of interviewers including: consistent questionnaire administration, timeliness, proportions of potential participants recruited and an empathetic communication style.
These outcomes were assessed using a standardized methodology for constructing the sample frame, selecting schools and classes, preparing uniform questionnaires, and following consistent field procedures [ 9].
Construct validity is the degree to which the scores of a questionnaire are consistent with questionnaires measuring the same construct.
To ensure that the questions are answered in a format that is suitable for analysis and the researchers' questionnaire completion is consistent, each questionnaire will be checked prior to data entry.
However, the tendency for Japanese parents or teachers to give lower scores to children's behaviors appears consistent among questionnaires such as the CBCL [ 29], ADHD-RS [ 33, 34], and Social Responsiveness Scale [ 40, 41].
Responses to the additional items added to the GPAQ questionnaire are consistent with the other questionnaire items concerning communication.
The results indicate a good level of completion for the LPH items and questionnaires consistent with the benefits of a single page instrument and reports from the qualitative work that the questionnaire was easy to complete.
On the other hand, to enhance validity, we used triangulation: a combination of, in our study, two methods (observations and subsequent interviews) to develop consistent and comprehensive questionnaires about problems and expectations [ 22, 23].
Overall, we found participants preferred response options that were consistent throughout the questionnaire, that numerical options elicited more consistently meaningful responses than word sets, and that numerical rating scales were the most intuitive for participants because they were typically asked about pain on a similar scale in health care settings.
The errors observed in the pointing task were consistent with the questionnaire data presented above.
