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Joshua M. Smyth

7 papers in the library · 457 citations · publishing 2017-2025

Papers

How mindfulness training promotes positive emotions: Dismantling acceptance skills training in two randomized controlled trials.

Journal of Personality and Social Psychology December 1, 2018 Emily K. Lindsay, Brian Chin, Carol M. Greco et al. 221 citations

Mindfulness interventions that train both monitoring of present-moment experiences and an accepting orientation toward them (Monitor + Accept) boost positive emotions in daily life, while training monitoring alone does not. Across two randomized controlled trials with stressed community adults, those who received Monitor + Accept training reported greater positive affect after the intervention compared with those who received monitoring-only training or no treatment. The effect appeared in end-of-day positive affect in an 8-week group-based study and in both end-of-day and momentary positive affect in a 2-week smartphone-based study. All active interventions reduced negative affect. Acceptance skills are a central mechanism for increasing positive emotions through mindfulness.

Psychological mechanisms driving stress resilience in mindfulness training: A randomized controlled trial.

Health Psychology May 23, 2019 Brian Chin, Emily K. Lindsay, Carol M. Greco et al. 107 citations

Training in both monitoring and acceptance skills—but not monitoring skills alone—reduced stress and increased nonjudgment in daily life. Stressed community adults who completed an 8-week mindfulness program that included acceptance training reported lower stress ratings and fewer stress episodes compared with those who received only monitoring training or no treatment. The findings suggest that acceptance skills may be a necessary active ingredient for stress resilience.

Mindfulness training and systemic low-grade inflammation in stressed community adults: Evidence from two randomized controlled trials

PLoS One July 11, 2019 Daniella K. Villalba, Emily K. Lindsay, Anna L. Marsland et al. 59 citations

Two randomized controlled trials tested whether mindfulness training reduces inflammation, measured by C-Reactive Protein (CRP), in stressed community adults. One trial used a 2-week smartphone-based intervention; the other used an 8-week Mindfulness-Based Stress Reduction program. Training that combined attention monitoring with acceptance skills did not lower CRP compared to training without acceptance or to a control condition. Exploratory analyses combining data from both studies suggested that either mindfulness approach might reduce CRP in midlife-to-older adults and individuals with high body mass index, populations at risk for systemic inflammation.

Mindfulness interventions improve momentary and trait measures of attentional control: Evidence from a randomized controlled trial.

Journal of Experimental Psychology General September 24, 2020 Brian Chin, Emily K. Lindsay, Carol M. Greco et al. 49 citations

An 8-week mindfulness-based stress reduction intervention that included both monitoring and acceptance skills, and a modified version that focused on monitoring skills only, both improved momentary and trait attentional control compared with no treatment. Improvements in momentary attentional control partially accounted for gains in trait attentional control. Performance on a dichotic listening sustained-attention task did not improve. The results suggest that present-focused monitoring skills training is a key driver of mindfulness-related improvements in attentional control.

How mindfulness training promotes positive emotions: Dismantling acceptance skills training in two randomized controlled trials

August 21, 2018 Emily K. Lindsay, Brian Chin, Carol M. Greco et al. 9 citations

Training in both monitoring present-moment experiences and accepting them boosts positive emotions more than monitoring alone. In two randomized trials with stressed community adults, a mindfulness intervention that taught monitoring plus acceptance skills increased daily positive affect, while a structurally equivalent intervention teaching only monitoring did not. The acceptance-focused intervention raised end-of-day positive affect in an 8-week group-based study and both end-of-day and momentary positive affect in a 2-week smartphone-based study. All active interventions reduced negative affect. These results indicate that cultivating acceptance toward present-moment experiences is a key mechanism through which mindfulness interventions enhance positive emotions in everyday life.

Acceptance lowers stress reactivity: Dismantling mindfulness training in a randomized controlled trial

September 28, 2017 Emily K. Lindsay, Shinzen Young, Joshua M. Smyth et al. 9 citations preprint

Training in both monitoring present-moment experience and accepting it reduces biological stress reactivity, whereas monitoring alone does not. In a randomized trial, 153 stressed adults completed one of three 15-lesson smartphone-based trainings: Monitor+Accept, Monitor Only, or an active Coping control. After training, a social stress test showed that Monitor+Accept training lowered cortisol and systolic blood pressure reactivity compared to the other two conditions. Subjective stress levels were moderate across all groups. The findings indicate that acceptance is a key mechanism driving mindfulness-related stress reduction effects on biology.

Who benefits from mobile health interventions? A dynamical systems analysis of psychological well-being in early adults.

Applied psychology. Health and well-being June 1, 2025 Saida Heshmati, Chelsea Muth, Yanling Li et al. 3 citations

An 8-week randomized controlled trial with 160 college-attending early adults aged 18-22 used a mobile health platform to test whether skills for psychological well-being can be learned through ecological momentary interventions. Participants were assigned to an active control group, a positive practices intervention, or a positive practices plus meditation intervention. Bayesian process modeling indicated that the mobile assessment tool itself may have improved well-being over time, shown by increased within-person mean levels, decreased intra-individual variability, and improved regulation of positive emotions and relationship quality. Moderation analysis further suggested that people who initially had low negative affect improved most in their average positive emotions and relationship quality.