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According to the information presented in the previous slides, the degree of internal validity of this study is presumably high. This model has also made it possible to control some of the threats to external validity as well. Therefore,

An “intervention” is more effective that doing nothing, and, although there is no proof that this type of intervention is better than others, it does seem to produce an incremental effect that surpasses the effect of the placebo. For this reason, in systems offering few “incentives”, such evidence-based educational sessions should be developed.

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