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Difficulty: MediumPhysiological Effects of Alcohol on Driving Performance

Alcohol consumption degrades a driver's choice reaction time—evaluating a situation and deciding whether to brake or swerve—significantly more severely than simple reflex reaction time.

Answer: Answer

Answer

True
The statement is correct because alcohol primarily targets executive functioning and cognitive decision-making in the brain. Evaluating multiple choices in a driving emergency requires higher cognitive effort, making choice reaction time far more vulnerable to alcohol impairment than simple reflex responses.

Step-by-Step Solution

1
Analyze how alcohol depresses central nervous system functions.
Alcohol impairs complex cognitive processing and decision-making in the cerebral cortex prior to impacting lower-brain simple motor reflexes.
Differentiating between cognitive decision-making and simple motor reflexes is essential for understanding driving impairment.
2
Compare simple reaction time with choice reaction time under alcohol impairment.
Simple reaction time involves responding to a single, expected signal (e.g., seeing a red light and pressing the brake). Choice reaction time involves processing multiple variables and choosing among several actions (e.g., deciding whether to brake or steer around a sudden obstacle). Choice reaction time degrades significantly faster and more severely.
Real-world driving hazards almost always require choice reaction time rather than isolated simple reflexes.

Key Concept

Differential Degradation of Choice Reaction Time vs. Simple Reaction Time
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Topics

Physiological Effects of Alcohol on Driving Performance

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