The control group __________.

A) provides a basis for comparison, allowing the experimenter to assess the effects of the experimental manipulation
B) must be matched to the experimental group in all respects except for the experimental manipulation
C) provides a means of reducing demand characteristics
D) both a and b are correct

Experimental Manipulation

The controlled alteration of an independent variable in an experiment to assess its effects on a dependent variable.

Demand Characteristics

Demand Characteristics refer to subtle cues or signals in an experimental setting that influence the participants' behavior or responses, potentially skewing the study's results.