Discuss ways in which this study achieved or failed to achieve the critieria for making causal inferences.

Read the Methods section of the report by Stephens and colleagues (“Smartphone technology and text messaging for weight loss in young adults” in attachment )and then answer the following questions: Pick 2-4 questions and just simple answer them. No introduction or conclusion please. This is just simple answering questions. a. What was the intervention? Comment on how well the intervention was described, including a description of how it was developed and refined. b. Comment on the researchers’ control group strategy. Could a more powerful or effective strategy have been used? c. Discuss ways in which this study achieved or failed to achieve the critieria for making causal inferences. d. Comment on the researchers’ use or nonuse of blinding. e. Comment on the timing of postintervention data collection. f. Is this study strong on external validity? What, if any, are the threats to the external validity of the study?


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