A researcher is interested in examining the effect of caffeine on driving performance.In order to rule out a change in behaviour brought about because of participants' expectations about the effect of caffeine,the researcher should include
A) a demand characteristic.
B) a balanced placebo design.
C) a manipulation check.
D) experimenter bias.

Question

Quizplus · Accepted Answer

A balanced placebo design involves both an experimental group that receives the treatment (caffeine) and a control group that receives a placebo. This design helps control for the placebo effect and participants' expectations, as both groups believe they may have received the treatment. This is a better option than the other choices listed.

A Researcher Is Interested in Examining the Effect of Caffeine