There is a growing call for evaluation capacity building (ECB); although the area currently lacks a rich research base, there are few robust methods and practice through which to define it. The argument in this article is that the impact of evaluation is mediated by program stakeholders' engagement in evaluation activities. This mediation provides…

Participation in a health promotion program for 192 overweight and obese adults with mental retardation was associated with behavior change resulting in reduction of body mass index--BMI (weight in kg, divided by height in meters, squared) by the end of the program. We analyzed the mediating and intermediate factors contributing to weight…