Activity trial leaves uncertain gains in psychological needs
An intervention targeting autonomy, competence, and relatedness did not significantly improve those needs in the analysis including everyone randomized, despite a reported mediation link to depressive symptoms.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The study tested a physical activity program designed to support autonomy, competence, and relatedness in adults with depressive symptoms. These needs did not improve significantly when everyone randomized was included in the analysis. A separate statistical model linked changes in needs to changes in depressive symptoms, but that does not establish a confirmed pathway of benefit.
Some claims of statistical significance conflict with the p values reported in the abstract. The abstract also provides no numerical estimate of the overall effect on depressive symptoms, making the clinical importance difficult to assess.
Why the analysis matters
The analysis limited to participants following the protocol favored the intervention for relatedness. The analysis including everyone randomized did not show significant improvement in psychological needs, making the apparent benefit dependent on which analysis is emphasized.
What mediation can show
The mediation model assessed whether changes in psychological needs helped explain the relationship between treatment and depressive symptoms. Such a statistical relationship can suggest a possible mechanism, but it does not resolve the uncertain intervention effect on those needs.
The original publication
Short and long-term effects of a self-determination theory-based physical activity intervention on basic psychological needs and their mediating role in adults with depressive symptoms.
Bertuol C, Tozetto WR, Bandeira ACN et al.
Psychol Sport Exerc · 2026
- PubMed ID
- 41213487
- Record checked
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