The DESIGN & METHOD section of the report is where you explain to your reader how you went about carrying out your research. You should describe the subjects, the instruments used, the conditions under which the tests were given, how the tests were scored, how the results were analyzed, etc.

Remember that this section needs to be very explicit. A good rule of thumb is to provide enough detail so that others could replicate all the important points of your research. Failure to provide adequate detail may raise doubts in your readers' minds about your procedures and findings.

Make sure you are honest and forthright in this section. For example, if you had some problems with validity, acknowledge the weaknesses in your study so that others can take them into account when they interpret it (and avoid them if they try to replicate it).