It is well-known that meaningful differences in development exist among children, adolescents, and adults. However, to what extent do evaluators adapt their approach, designs, and methods to be responsive to a youth population? This study used an experimental simulation in which practicing evaluators designed an evaluation of a hypothetical tutoring program and were randomly assigned to the program serving children, adolescents, or young adults. Results indicate that evaluators were less likely to be participatory—both in the evaluation overall and in data collection—when the participants of the program were children than when they were adults. These findings suggest that evaluators, even those with experience conducting evaluations of youth programs, do not consider age as a meaningful cultural context and may need additional training in conducting developmentally appropriate evaluations.