Psychological Constructs Related to Belt Use [Traffic Tech]

NHTSA · 2020 · ROSA P / United States. National Highway Traffic Safety Administration. Office of Behavioral Safety Research

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Summary

This study addresses the plateau in U.S. seat belt usage rates, which reached 90.7% in 2019 but have stagnated in recent years. While demographic and situational factors influencing belt use are well-documented, the psychological drivers behind the behavior remain underexplored. The research aimed to determine whether specific psychological constructs—such as impulsivity, risk perception, and optimism—predict self-reported seat belt use, thereby identifying potential targets for behavioral interventions. The researchers conducted a nationally representative survey between June and July 2018, recruiting 6,038 participants (5,833 adults and 205 teens) via GfK’s KnowledgePanel. The study examined associations between seat belt use and 18 psychological constructs. Seat belt use was measured using three distinct metrics: a primary binary measure (always vs. not always), an adjusted measure incorporating situational data (e.g., rear seat, night driving), and a composite score derived from multiple correspondence analysis. Statistical analyses included logistic and linear regressions accounting for complex sampling designs, as well as mediation analyses to assess whether psychological factors explained demographic disparities in belt use. Results indicated significant discrepancies in reported usage: 76% of respondents claimed full-time use on the primary measure, whereas the adjusted measure revealed only 52% were consistent users. Common reasons for non-use included short trip distances, forgetfulness, and discomfort. Psychologically, higher levels of delay of gratification, life satisfaction, risk aversion, and risk perception were positively associated with full-time belt use. Conversely, impulsivity and a "social resistance orientation" (engaging in risky behaviors as acts of defiance) were negatively associated with use. Unexpectedly, loneliness and resistance to peer influence were also linked to higher belt use. Mediation analyses revealed that psychological constructs fully explained the effects of age, sex, and one regional difference on belt use. For instance, males’ lower usage rates were partly mediated by their lower perception of risk. However, psychological factors did not fully explain differences related to marital status or other regional variations. Additionally, situational analysis showed significantly lower belt use in rear seats, taxis, and rideshares compared to driving. The findings suggest that psychological constructs are critical predictors of seat belt behavior and can elucidate why certain demographic groups, such as males and younger drivers, are less likely to wear belts. The study implies that safety campaigns should move beyond general compliance messaging to address specific psychological barriers, such as low risk perception or impulsivity. By targeting these underlying constructs, interventions can be more effectively tailored to high-risk populations, potentially breaking the current plateau in national seat belt usage rates.

Key finding

Impulsivity and social resistance orientation negatively predict seat belt use, whereas risk aversion, risk perception, and delay of gratification positively predict it, with psychological constructs fully mediating the effects of age and sex on belt use.

Methodology

survey

Sample size: 6038

Provenance

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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• seat belt use
• child passenger safety

Information type

What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).

• Empirical Findings: observational prevalence