Effect of smartphone breathalyzer feedback on willingness to drive in moderately intoxicated individuals: A randomized trial.

IF 2.7 2区心理学 Q1 PSYCHOLOGY, MULTIDISCIPLINARY

Psychology of Addictive Behaviors Pub Date : 2025-11-01 Epub Date: 2025-08-14 DOI:10.1037/adb0001088

Jeffrey P Ebert, Henry R Kranzler, Ian J Barnett, Jessica E Hemmons, Ruiqi Yan, Evan Spencer, M Kit Delgado

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引用次数: 0

Abstract

Objective: The present study examined the impact of smartphone breathalyzer feedback on individuals' decisions to drive when they are moderately intoxicated. Although the legal driving limit for blood alcohol concentration (BAC) in the United States is < 0.08%, crash risk begins to increase at moderate BACs ≥ 0.04%.

Method: We conducted a laboratory-based, randomized controlled trial in 20 adult drivers aged 21-39 with a history of binge drinking. Participants were given sex- and weight-based doses of alcohol over 90 min with a target peak BAC of 0.10%. Smartphone breathalyzer measurements were taken every 15 min until the participant's BAC declined to 0.03%. Ten participants received feedback on their BAC readings, while the other 10 were blinded to BAC readings. After each measurement, participants were asked to rate on 10-point scales how much they were intoxicated, able to drive, and willing to drive.

Results: At BACs ≥ 0.04% and < 0.08%, learning about BAC was associated with lower perceived intoxication (-2.0, confidence interval [-3.1, -0.8]), greater perceived ability to drive (2.4, confidence interval [1.0, 3.9]), and greater willingness to drive (3.9, confidence interval [2.5, 5.3]), all ps < .001.

Conclusions: Being aware of their BAC may make drinkers more willing to drive up to the legal BAC limit of 0.08%, despite being in a range associated with increased crash risk. We recommend that breathalyzer apps provide salient feedback about the risks of driving with a BAC in the moderately intoxicated range. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

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智能手机酒精测试仪反馈对中度醉酒个体驾驶意愿的影响：一项随机试验。

目的：本研究考察了智能手机呼气测醉器反馈对个人在中度醉酒时驾车决定的影响。虽然美国法定的血液酒精浓度（BAC）限制为< 0.08%，但当中等浓度(BAC)≥0.04%时，撞车风险开始增加。方法：我们对20名年龄在21-39岁之间有酗酒史的成年司机进行了一项基于实验室的随机对照试验。参与者在90分钟内按性别和体重给予酒精剂量，目标峰值BAC为0.10%。每15分钟进行一次智能手机酒精测量，直到参与者的酒精浓度下降到0.03%。10名参与者收到了关于他们BAC读数的反馈，而另外10名参与者对BAC读数一无所知。每次测量后，参与者被要求以10分制对他们醉酒的程度、能够开车的程度和愿意开车的程度进行评分。结果：在BAC≥0.04%和< 0.08%时，学习BAC与较低的醉酒感知（-2.0，可信区间[-3.1,-0.8]）、较强的驾驶感知能力（2.4，可信区间[1.0,3.9]）和较强的驾驶意愿（3.9，可信区间[2.5,5.3]）相关，所有ps均< 0.001。结论：了解自己的酒精浓度可能会让饮酒者更愿意开车到法定酒精浓度上限0.08%，尽管这一范围与撞车风险增加有关。我们建议酒精测试应用程序提供关于酒精浓度在中度醉酒范围内驾驶风险的显著反馈。（PsycInfo Database Record (c) 2025 APA，版权所有）。

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来源期刊

Psychology of Addictive Behaviors Multiple-

CiteScore

4.90

自引率

11.80%

发文量

165

期刊介绍： Psychology of Addictive Behaviors publishes peer-reviewed original articles related to the psychological aspects of addictive behaviors. The journal includes articles on the following topics: - alcohol and alcoholism - drug use and abuse - eating disorders - smoking and nicotine addiction, and other excessive behaviors (e.g., gambling) Full-length research reports, literature reviews, brief reports, and comments are published.