Posted by **adrina ** on Wednesday, January 4, 2012 at 9:57pm.

why is it wrong for a researcher to assign the first subjects to show up for an experiment group and the second group of subjects to arrive to the control group?

- Psychology -
**Ms. Sue**, Wednesday, January 4, 2012 at 10:01pm
The two groups are different. Besides, the subjects may realize then that one is the control group and the other is the experimental group.

- Psychology -
**PsyDAG**, Friday, January 6, 2012 at 12:38pm
There is a confounding variable introduced in terms of promptness of arrival, which may influence the dependent variable, whatever that is.

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