How to make orderly observations. How to get an experimental idea. How to find out what's been done. How to decide which variables to manipulate and measure. How to decide on a within-subject versus between-subjects design. How to plan a single-variable experiment. How to plan a multiple-variable experiment. How to plan quasi-experiments. How to interpret experimental results. How to report experimental results. How to use theory. How to tell when you are ready to begin. How to be fair to subjects. How to be fair with science.
