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Short-term reliability of a brief hazard perception test
Charles T Scialfa1, Rosemary S Pereverseff1, David Borkenhagen1
1University of Calgary, Department of Psychology, Calgary, AB, Canada T2N 1N4.
Accident; Analysis and Prevention
|September 1, 2014
Summary
This study shows that a brief hazard perception test (HPT) is reliably stable over one month for young adult drivers. This supports its use in driver licensing and predicting crash risk.
Area of Science:
- Psychology
- Traffic Safety
- Human Factors
Background:
- Hazard perception tests (HPTs) are used in driver licensing but their short-term stability is unknown.
- Evaluating HPT reliability is crucial for their validity and acceptance.
Purpose of the Study:
- To assess the short-term reliability of a brief, dynamic hazard perception test.
- To determine if HPT scores remain stable over a one-month interval in young adult drivers.
Main Methods:
- Fifty-five young adults completed two parallel 21-scene HPTs one month apart.
- Internal consistency (Cronbach's alpha) and test-retest correlation were analyzed.
Main Results:
- The brief HPT demonstrated acceptable short-term reliability (correlation=0.55, corrected to 0.72).
- Minimal practice effects (∼0.1s) were observed between test administrations.
- Internal consistency (Cronbach's alpha) averaged 0.73.
Conclusions:
- A brief HPT shows acceptable short-term stability in young adult drivers.
- This reliability supports HPTs for driver licensing and predicting crash risk.
- Further research is needed on stability in novice and older drivers.
