Simply expecting something to happen can make it happen. this describes a. observer bias b. experimenter bias c. participant bias d. placebo effect

Experimenter bias happens when we go into an experiment with some prejudice (conscious or unconscious) or just expecting to see what we want to see. Our own experiences or feelings are influencing our view.

Having explained this, the correct answer is "b", so the completed answer would be: "Simply expecting something to happen can make it happen. This describes experimenter bias."

answer; (c) on the left side; ; ; ; ; ; ; ; ; ; ; ; ; speech is localized on the left side of the brain;