You are sitting in your time machine, trying to decide what date and location to set. You want to go back to the earliest time and place that assessment was widely used. You should set the dial to send you back about ________ years to the country of _____

The experimental method allows for causal explanations and maximum control. However, a

major limitation of the experimental method is a. results cannot be replicated. b. generalizability. c. extraneous variables. d. certain variables cannot be ethically manipulated.

If groups in two different workplaces are studied to see how changes in working conditions affect output, those in one workplace may experience events not related to the independent variable but that affect the dependent variable

The threat to internal validity here is a. selection. b. maturation. c. statistical regression. d. history.