A researcher who uses a double-blind experimental design is most likely trying to reduce which threat to external validity?
A) Effects of selection
B) Experimenter reactivity
C) Treatment and setting interactions
D) Treatment and history interactions

Question

Quizplus · Accepted Answer

A double-blind design is used to reduce experimenter reactivity, which is when the experimenter's expectations or behavior influence the outcome of the study.

A Researcher Who Uses a Double-Blind Experimental Design Is Most