In many studies, increasing control to enhance internal validity may reduce ecological validity. True or False?

• A. False
• B. It depends on design
• C. There is no trade-off
• D. True

Answer: (D)

The idea here is about a common design balance in psychology: internal validity versus ecological validity. When researchers increase control—standardizing procedures, tightly managing variables, and conducting the study in a controlled environment—they reduce the influence of confounding factors and stronger causal claims follow. But that same tight control often creates an artificial setting, making it harder for the results to generalize to real-world contexts where conditions are messier and people behave differently. So, enhancing internal validity by increasing control can come at the cost of ecological validity. That trade-off is why the statement is true.

In some designs you can still keep realism while maintaining control, but the typical pattern is that more control improves internal validity and tends to reduce ecological validity.