Improving mental wellbeing has a range of benefits for society, including increased productivity, longevity, and resiliency. However, interventions designed to improve mental wellbeing are often only compared to waitlist controls, leaving uncertainty regarding the mechanisms of their effectiveness. The current study in 326 participants assessed a six-week positive psychology intervention against an active control (n = 163) in an online randomized control trial. Outcome measures included life satisfaction, wellbeing (subjective and psychological wellbeing), stress, depression and anxiety symptoms, and self-compassion. The potential moderating effect of participating during the ongoing COVID-19 pandemic was also explored. The intervention group showed greater improvements in life satisfaction by week six (β = 0.18, p = .014) and were maintained through to 7 weeks post-baseline (β = 0.23, t = 3.07, p = .002) and remained significant when accounting for COVID-19 restrictions. An improvement in composite wellbeing from baseline to 7 weeks post-baseline was detected when accounting for COVID-19 restrictions. Composite wellbeing and total depression and anxiety symptoms improved significantly more in the intervention group for participants with low baseline resiliency resources. These findings support the efficacy of using online multi-component positive psychology interventions in boosting wellbeing and reducing distress symptoms particularly in individuals with fewer resiliency resources who may need added support.

改善心理健康对社会有一系列好处，包括提高生产力、长寿和复原力。但是，旨在改善心理健康的干预措施通常仅与候补名单控制进行比较，从而对其有效性的机制存在不确定性。目前对 326 名参与者的研究评估了针对主动控制的六周积极心理学干预 ( n = 163）在线随机对照试验中。结果测量包括生活满意度、幸福感（主观和心理幸福感）、压力、抑郁和焦虑症状以及自我同情。还探讨了在持续的 COVID-19 大流行期间参与的潜在调节作用。干预组在第 6 周显示出更大的生活满意度改善 (β = 0.18, p  = .014)，并维持到基线后 7 周 (β = 0.23, t  = 3.07, p = .002）并且在考虑到 COVID-19 限制时仍然很重要。在考虑到 COVID-19 限制时，检测到从基线到基线后 7 周的综合幸福感有所改善。对于基线弹性资源较低的参与者，干预组的综合幸福感和总抑郁和焦虑症状的改善显着更多。这些发现支持使用在线多成分积极心理学干预措施在提高幸福感和减少痛苦症状方面的功效，特别是对于可能需要额外支持的弹性资源较少的个体。