Examining Valence-based Effects in Self-Monitoring Feedback Messages

Inclusion Criteria: * Age greater than or equal to 18 years * BMI greater than or equal to 25.0 kg/m2 * Weight less than or equal to 175 kg (due to scale limit) * Own a smartphone compatible with Fitbit (e.g., an Apple iPhone running iOS 16.4 or higher or Android smartphone running Android 11 or higher) with a cellular and data plan Exclusion Criteria: * Weight greater than 175 kg (due to a weight limit of the study-provided scale) * Smartphone device owned deemed incompatible with the Fitbit App * History of bariatric surgery or plans to obtain bariatric surgery during the study period * Current use of weight loss medications, or use of weight loss medications in the 6 months prior to initial pre-screening * Currently participating in a weight-loss program * Weight loss of greater than or equal to 10 lbs in the 6 months prior to initial pre-screening * Physical limitations that prevent walking at a brisk pace for at least 10 minutes without stopping * Use of a pacemaker or other implanted medical device * Currently pregnant * Currently breastfeeding * Less than 1-year post-partum * Plans to become pregnant within the study period * Lack of written confirmation that the potential participant has discussed study participation with their physician if they have been diagnosed with diabetes, hypertension, or has have a history of coronary heart disease * One or more study participants living in the household (enrollment limited to one participant per household) * Medical condi…