A threat to internal validity that refers to the fact that the researcher knows the research hypothesis and thus causes an invalid confirmation of the research hypothesis is known as
A) a demand characteristic.
B) experimenter bias.
C) a placebo effect.
D) an informed experimenter effect.

Question

Quizplus · Accepted Answer

Experimenter bias occurs when the researcher's expectations or preferences about the outcome of the study influence the results, often unconsciously. This can lead to invalid confirmation of the research hypothesis because the researcher might inadvertently treat participants differently or interpret data in a way that supports their expectations.

A Threat to Internal Validity That Refers to the Fact