When an experimenter's expectations about a behavior influence the results of his experiment, it is called a

Question

a.placebo effect


b.self-fulfilling prophecy


c.single-blind experiment


d.double-blind experiment

Answer 1

D, double blind experiment. This is why you need both the experimenter and experiment to be unaware of the situations outcome.

Answer 2

No. A double blind experiment avoids experimenter bias.