The purpose of this study was to test effectiveness of an intervention on consumer thermometer use by using a randomized experimental design and direct observation of meal preparation. The study was conducted in test kitchen facilities located in two locations in North Carolina (one urban and one rural). Cameras recorded participants’ actions at various locations throughout the kitchen and recorded the meal preparation from beginning to end. Before preparing the meal, a randomized treatment group watched a 3-minute United States Department of Agriculture (USDA) food safety video “The Importance of Cooking to a Safe Internal Temperature and How to Use a Food Thermometer” ( https://www.youtube.com/watch?v=-2KkV2yFiN0 ). Participants in the control and treatment groups were observed while cooking turkey burgers and preparing a salad to determine whether they used a thermometer to check the doneness of the turkey patties. Following meal preparation, all participants responded to a post-observation interview about food handling behaviors. Treatment group participants were also asked about the intervention. A total of 383 people participated in the study (201 control, 182 treatment). Participants who viewed the video were twice as likely to use a thermometer to check the doneness of the turkey patties compared with those who were not exposed to the video (75 vs. 34%) and twice as likely to place the thermometer in the correct location (52 vs. 23%). Sixty-seven percent of participants who watched the video reported that it influenced their behavior in the kitchen. This study demonstrates the importance of timing and framing of a behavioral intervention for thermometer use, and highlights considerations for the development of additional messages (e.g., proper insertion).

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