Which method uses before-and-after tests and a control group to test the effectiveness of a training program?

• A. Action Research
• B. Controlled Experimentation
• C. Learning
• D. Evaluate

Answer: (B)

Controlled experiments use before-and-after measurements and a control group to determine if a training program is effective. By taking a baseline, measuring performance after the training, and comparing those results to a group that does not receive the training, you can isolate the effect of the training from other factors that might influence outcomes, like time, practice, or external events. Randomly assigning participants to the trained and control groups (when possible) strengthens this by reducing bias, making the observed differences more likely due to the training itself rather than other variables. Action Research involves iterative, collaborative inquiry in real-world settings and isn’t inherently about a control group; Learning is the process or outcome, not a study design; Evaluate refers to judging worth or success and can use various methods but doesn’t specify the use of a control group or pre/post testing.