Interventions
The meditation and non-native language training interventions were structurally equivalent in overall course length, class time, and home activities, and matched in administration, dosage, duration, and level of expertise and number of facilitators per class. Interventions were manualized and comprised 2-hour weekly group sessions, daily home practice (minimum 20 minutes), and 1-day intensive practice (5 hours). Participants were encouraged to participate in all activities, and to not practice activities proposed in the other arms.The meditation training consisted of an original secular program designed for Age-Well and based on preexisting interventions.The non-native language training was a cognitively stimulating program consisting of English exercises designed to reinforce participants’ abilities to understand, write, and speak English. Sessions were tailored to baseline English proficiency levels and incorporated oral comprehension and expression activities to facilitate acquisition of vocabulary and grammatical structures.The no intervention group was requested not to change their habits and to continue living as usual. eAppendix 1 in 