Which one of the following conditions helps achieve high internal validity in an experiment?
A) Random assignment to experimental and control groups.
B) Random selection of participants for an experiment.
C) Experiment conducted in natural settings.
D) Experiment where participants are free to withdraw at any time.

Question

Quizplus · Accepted Answer

Random assignment to experimental and control groups helps achieve high internal validity by reducing the potential for confounding variables to influence the results. It ensures that any differences between the groups are due to the manipulation of the independent variable and not some other factor. Random selection of participants helps ensure external validity, but it does not directly impact internal validity. Conducting the experiment in natural settings and allowing participants to withdraw at any time may increase external validity but can also introduce confounds and reduce internal validity.

Which One of the Following Conditions Helps Achieve High Internal