1.Based upon your reading of the experimental study of Project CRISS, and the information provided by the authors of the study, provide a discussion board posting of 200 – 250 words in which you analyze the study in terms of threats to the validity of the study. Be sure to address both external and internal validity.Single-Subject Experimental design2. Follow the steps for application of single-subject experimental design as described above. Select one of these research studies and do the following:  Explain how the study might be conducted and draw a representation of your proposed design.

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