Again, I want you to take measurements around your workspace or in your home. To make this more interesting, you might consider making subjective evaluations of things. Noise level of children, softness of your pets' ears, whatever you like. :) This time, take the measurements, then (without looking at your previous set of measurements) measure them all again. Calculate the correlation between the two measurements using the online correlation calculator. http://easycalculation.com/statistics/correlation.php Write a paragraph about your process, including the correlation between your two sets of measurements. Give me your opinion about the reliability of your measurements. ************************************************ Assignment 20: At this point in the course, you should be writing your methods and results papers. I want a brief summary of your method for your paper, and then I want you to choose at least two respects in which your internal validity may be threatened. Tell me how these factors may influence internal validity, and then tell me how you plan to account for them. Note: if you've already done a great deal to account for this, that's great! Just tell me what you've already done! ************************************************ Assignment 21: You should be developing your methods and results papers, but you'll be writing the Discussion section of your final papers soon. I want you to think ahead about replications of your experiment you could perform to increase its external validity. Write a brief paragraph about two replications of your experiment that you would perform if your hypothesis were confirmed. Describe how these replications could increase external validity.