Aim
It is unclear how adult mindfulness‐based interventions (MBIs) should be modified for youth, and at what ages programmes should be implemented for optimal impact. Recent non‐replication with a 9‐week programme in early adolescence suggested abbreviated programme content might be insufficient and/or that this age group are less receptive.
Method
This controlled quasi‐experimental design tested a more intensive 8‐week MBI (longer meditation and session duration, plus inquiry) in Year 8 (Mage = 13.47; SD = 0.35) and Year 10 (Mage = 15.47; SD = 0.40) secondary students for feasibility and acceptability (N = 143, 45.9% female).
Results
Within this format students rated the content as agreeable, and school staff deemed content developmentally appropriate, across both age bands. Efficacy was tested in a small subsample (N = 90) to provide an estimate of effect size. Linear mixed modelling demonstrated significant between‐group differences in depression (Cohen's d = 0.61; 95% CI = 0.19 to 1.03) and anxiety (d = 0.52; 95% CI = 0.10 to 0.94) at 4‐month follow‐up, but not immediately post‐intervention.
Conclusion
An MBI more closely modelled on adult curricula was acceptable to students, although session duration was harder to timetable by schools. Promising effect sizes support further investigation in a larger sample.