Imagine that a group of researchers conducted a study designed to test the effectiveness of subliminal- message weight-loss tapes. Suppose the researchers found that everyone lost weight during the study, even those who were given tapes without any subliminal messages. What could we conclude from the results?
A- there is evidence that the study contained confounding variables
B- subliminal tapes are effective in promoting weight loss
C- there is evidence of a placebo effects
D- the independent and dependent variables in the study are negative correlated
E- there is evidence of experimenter bias
