Effects of the Best Possible Self intervention: A systematic review and meta-analysis.

However, it is worth noting that the magnitude of the intervention, measured in total minutes of practice, and the mean age (in years) of participants presented marginally statistically significant results, as well as percentages of explained variance above 15% (see Table 5 ).

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Marginally significant differences were found in the characteristics of the population where the intervention was administered, specifically regarding age, indicating that the age of the participants could play a role in the effectiveness of the intervention.

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Moderator analyses did not show statistically significant results for wellbeing, except for a trend towards significance in the age of the participants (years) and the magnitude of the intervention (total minutes of practice).

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