Concept Quiz 5

208044894	independent variable	the variable that is manipulated by the experimenter
208044895	dependent variable	the variable that is measured to see what effect the independent variable had
208044896	placebo	something given to some of an experiment's participants in order for them to think they are receiving the real treatment
208044897	double-blind design	an experimental procedure in which neither the research staff nor the research participants know who is receiving the treatment or placebo
208044898	placebo effect	an observed improvement in subjects because subjects believe a change will occur
208044899	experimenter bias	any effect that the expectations of the researcher may have had on the measurement and recording of the dependent variable
208044900	confounding variables	factors that cause differences between the experimental group and the control group other than the independent variable