Final answer:
Process evaluation is the assessment of a program's effects on clients while they are actively participating in the program, focusing on implementation and service delivery.
Step-by-step explanation:
The type of evaluation that refers to the assessment of effects of the program on clients while they are in the program is process evaluation. Process evaluation is concerned with the implementation of the program and how it functions during the operation. It focuses on the inner workings of the program, including its processes, how services are delivered, and the immediate experiences of the participants. Evaluators, such as community psychologists, use process evaluation to ensure that a program is being implemented as intended and to identify areas for improvement while the program is active.