Leveraging the Prolific Platform for Substance Use Research: Recommendations for Repeated Assessment and Psychometric Studies
We present data from multiple samples demonstrating the Prolific platform’s potential for efficiently collecting data for substance use research involving repeated assessments, including for psychometric research requiring large samples. First, we present data from a 5-day daily diary protocol. We recruited a large sample (N = 321 at Day 1) screened for a history of self-identified mental health issues and weekly alcohol use. Participant adherence was good (82%) even without in-person contact. Alcohol use patterns conformed to theoretical expectations: Participants were more likely to drink on Fridays and Saturdays than other days, men drank more than women, and higher Alcohol Use Disorders Identification Test (AUDIT; Saunders et al., 1993) scores were associated with an increased likelihood of use and more overall drinking. Second, we present data from 429 Prolific participants screened for a history of mental health issues who completed assessments 2 weeks apart with strong retention (N = 377; 88%). We compare these data with data from undergraduates (N = 529) to demonstrate Prolific’s utility for conducting psychometrically-oriented substance use research. Internal consistency estimates for measures from the Prolific data matched or exceeded those from the undergraduate data. Furthermore, measure scores showed strong temporal stability, and factor structures (e.g., AUDIT item level structures) conformed to theoretical expectations. Collectively, findings indicate that Prolific can be used successfully for repeated measures data collection. We also provide recommendations for using Prolific to target participant recruitment for repeated measures studies, especially in the areas of psychometric and substance use research.