Experimental bias which is a factors that distort the way the independent variable affects the dependent variable in an experiment. One of the most common forms of experimental bias is experimenter expectations: An experimenter unintentionally transmits cues to participants about the way they are expected to behave in a given experimental condition. The danger is that those expectations will bring about an “appropriate” behavior-one that otherwise might not have occurred (Rosenthal, 2002, 2003).
Definition