research on an article

Analyze how the researchers created the "observational schedule" (the checklist used by the researchers) in the article and assess the strengths and weaknesses of how it was developed, applying the concepts in the lecture and readings for this module.

Consider the following when writing your post:  where the researchers obtained the original checklist, how they revised it for this study, how they tested validity and reliability of the checklist before using it in this study.