Evaluating the Content Validity of a New On-Road Driving Test

Abstract

This study aimed to examine the content validity of on-road tests in real traffic environments over 4 phases. Phase 1: Extracted on-road test items from the previous study. Phase 2: Conducted a semi-structured interview with occupational therapists and driving instructors, and analyzed the qualitative data. Phase 3: Developed texts for the new on-road tests. Phase 4: Conducted a web-based Delphi survey. Phase 1: Extracted the large items (1006 labels) from 18 on-road tests. Phase 2: Categorized 49 items of the on-road tests into the 11 categories. Phase 3: Created new on-road test items. Phase 4: After four rounds of the web-based Delphi survey, consent was obtained for all items from more than 80% of respondents. Finally, we reached a consensus with 44 items in the driving school evaluation and 47 in the public on-road test. Our results support strong content validity of the on-road test regarding driving behavior.

Keywords:

• Older people
• disability
• driving
• evaluation
• on-road test

Acknowledgment

We would like to thank Yo Igari at IMS Katsushika Rehabilitation hospital and Haruka Hamana at IMS Yokohama Kariba Neurosurgical Hospital.

Competing interests

None declared.

Data sharing statements

Raw data of Phase 4 from this study are available in the supplementary files. The raw data of Phase 1 is not described due to the huge amount of data. Other data are not available because of language problem. However, if you need the data (involving Japanese data), you may use it by contacting author.

Disclosure statement

The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Additional information

Funding

This work was supported by the Japan Society for the Promotion of Science [Grant number 70434529].