Many products that can impact upon health and wellbeing (e.g. alcohol, food) relay information to consumers about the potential risks. However, such information is commonly provided in suboptimal format for gambling-related products. To encourage safer gambling, research has therefore recommended that information about the average loss from a gambling product (“house edge”) or percentage payout (“return-to-player”) should be communicated, with the former translating to better perceived understanding by gamblers. In this study, Newall et al. (2022) aim to experimentally compare two phrasings of the house edge against a control return-to-player to arrive at the most effective phrasing to aid gambler’s perceived chances of winning and their factual understanding of the statistical outcomes of their bet. Using a hypothetical gambling scenario, a sample of 3,000 UK-based online gamblers will be randomly assigned to receive two alternative phrasings of the house edge or the equivalent return-to-player information. Two outcome measures will be used to judge the effectiveness of the house edge information: gamblers’ perceived changes of winning and rates of accurate responding on a multiple-choice question measuring factual understanding of this information. This study will therefore assess the most effective communication of gambling risk, which can inform public health policies to reduce gambling-related harm.

 

Following a positive initial appraisal, and after two rounds of in-depth review, the recommender judged that the manuscript met the Stage 1 criteria and awarded in-principle acceptance (IPA).

 

URL to the preregistered Stage 1 protocol: https://osf.io/5npy9
 
Level of bias control achieved: Level 6. No part of the data or evidence that will be used to answer the research question yet exists and no part will be generated until after IPA. 
 
List of eligible PCI RR-friendly journals:

 

 

 
1. Newall, P. W. S., James, R. J. E. & Maynard, O. M. (2022). How does the phrasing of house edge information affect gamblers’ perceptions and level of understanding? A Registered Report, in principle acceptance of Version 3 by Peer Community in Registered Reports. https://osf.io/5npy9