Email-Delivered Digital Positive Affect Intervention for Young Adults in Zimbabwe

Digital mental health interventions are increasingly recognised as scalable and accessible approaches to supporting psychological well-being, particularly among young adults. These approaches may be especially valuable in low- and middle-income countries, where mental health services are limited and barriers to help-seeking remain substantial. Previous research in Zimbabwe has demonstrated the feasibility and acceptability of digitally delivered mental health interventions (Dambi et al., 2022). However, little is known about the feasibility of self-guided digital interventions designed to enhance positive affect and psychological well-being among young adults.

Therefore, the aim of this study is to evaluate the feasibility and acceptability of a brief email-delivered positive affect intervention among young adults in Zimbabwe and to explore its preliminary effects on positive affect, negative affect, symptoms of depression and anxiety, suicidality, and self-stigma associated with seeking psychological help.

The primary objective of the study is to evaluate the feasibility, acceptability, usability, and participant engagement of a brief email-based positive affect intervention.

The secondary objectives of the study are; To examine changes in positive affect following participation in the intervention.

To assess changes in anxiety, depression, suicidality, and negative affect following participation in the intervention.

To explore changes in self-stigma associated with seeking psychological help following participation in the intervention.

This study is a two-arm, parallel-group randomised controlled feasibility trial. Participants will be randomly allocated in a 1:1 ratio to either a positive affect intervention group or an active psychoeducational control group. The intervention period will last three weeks, with assessments conducted at baseline (T0) and immediately following the intervention (T1).

In addition to that, participants will be recruited from a previously established cohort of young adults in Zimbabwe who participated in a cross-sectional mental health survey and consented to future contact. The study aims to recruit 100 participants aged 18-25 years.

Ethical approval has been obtained from the Medical Research Council of Zimbabwe and relevant authorities. Participation is voluntary, and informed consent will be obtained before enrolment. Participants may withdraw from the study at any time without penalty. All data will be collected electronically, stored securely, and managed in accordance with data protection and confidentiality requirements.

Inclusion criteria

Participants must meet all of the following criteria:

• Aged 18-25 years.
• Able to understand and read English.
• Previously participated in Stage 1 of the study and provided consent to be contacted regarding future research opportunities.
• Have access to a device (for example smartphone, tablet, or computer) and internet connectivity for intervention delivery.
• Report moderate levels of depression at baseline assessment.

Exclusion criteria

Participants will be excluded if they:

• Are at high risk of suicide.
• Are currently experiencing a psychotic episode.
• Are currently experiencing interpersonal violence.