Preventing Distracted Driving Phase II

The purpose of the study is to determine the efficacy of a smartphone app in reducing mobile phone use while driving among teens and parents. Prior to sending a message, the smartphone app informs a potential message sender that the recipient is driving.

The primary objective of this study is to determine whether the app reduces (1) smartphone communication sent from parent to teen while the teen is driving; and (2) smartphone communication sent from teen while the teen is driving. The secondary objectives are to: Determine whether the app reduces smartphone communication sent from teen to parent while parent is driving; Evaluate the acceptability of the app among parents and teens; and determine the relationship between individual differences (demographics, typical smartphone use, driving history, risk perception) and the app's efficacy.