To guard against participant expectations biasing the results of an experiment,the experimenter may:
A)disclose to participants how earlier participants tested.
B)explain to the participant what the desired outcome should be.
C)try to disguise the true purpose of the experiment.
D)allow the participant to interact with people who have already been part of the experiment.

Question

Quizplus · Accepted Answer

Disguising the true purpose of the experiment can help prevent participant expectations from biasing the results. This can be achieved by using cover stories, using a placebo group or using a double-blind design. Disclosing earlier participants' results or explaining the desired outcome may create demand characteristics and bias the results. Allowing participants to interact with people who have already been part of the experiment may also create contamination and bias the results.

To Guard Against Participant Expectations Biasing the Results of an Experiment,the