Individual Differences (Driver Population)

Stable driver attributes that vary across the population (cognitive capacity, sex and gender, culture, sensory function, personality) treated as grouping or predictor variables.

What's here. Work that compares drivers by who they are rather than by what they do at the wheel: cognitive_capacity_variation within the normal range, sex_gender comparisons, cultural_cross_national samples, sensory_abilities such as vision and hearing measured as ability, and personality_driving as a broad trait dimension. Typically between-subjects comparisons, population norms, and studies where the driver characteristic itself is the independent variable.

What isn't here.

• specific trait and emotion constructs, such as sensation seeking, risk taking, anger, and aggressive driving, plus the questionnaire psychometrics that score them — Driver Psychology, Style & Traits. Personality here is a broad dimension used to segment the driver population. The named trait, style, and affect constructs, and the instruments behind them, are in the sibling category of this area.
• age and driving experience as the difference variable, including novice drivers, older drivers, and fitness-to-drive assessment — Age & Experience. Age is deliberately not shelved as an individual difference here. Sensory abilities in this category covers vision and hearing measured as ability; perceptual decline indexed to aging is filed under age and experience.
• diagnosed or substance-induced loss of capacity, including cognitive impairment, physical impairment, and medical conditions — Driver Impairment. Cognitive capacity variation here means normal-range ability in healthy drivers. Clinical deficits belong to impairment, and dementia-related fitness questions to age and experience.