The Internal Validity of an Experiment Is Lowered by Experimenter

question 193

Multiple Choice

The internal validity of an experiment is lowered by experimenter expectancy effects because:

• A) the experimenter made a mistake in using a correlational design instead of an experimental design.
• B) the results of the experiment may have been due to participants' expectations about the treatment they thought they were receiving.
• C) there is a confounding effect and you can't tell whether the independent variable or the dependent variable caused the results.
• D) the behaviour of the experimenter may have caused the participants to respond the way they did.