In Brazil, there is a lack of investment in psychosocial treatments for dementia. Cognitive Stimulation Therapy (CST) is an evidence-based psychosocial intervention for people living with dementia (PlwD) that has been adapted and validated to several countries. Developed in the UK, it involves 14 sessions over seven weeks. It aims to improve cognitive function through themed group activities, which implicitly stimulate skills including memory, executive function and language. Sessions follow a set of guiding principles which include mental stimulation, new ideas, thoughts and associations and opinions rather than facts. Studies suggest that CST can improve cognition, mood, quality of life and activities of daily living in mild to moderate dementia. In Brazil, a randomized controlled trial (RCT) sought to investigate the feasibility of CST in the country. The results suggest that those who took part in the CST groups had a significant improvement in measures relative to mood and activities of daily living. Due to the COVID-19 pandemic, adaptations were made for virtual delivery, and virtual CST (vCST) groups are being conducted. The first study was conducted alongside the randomized RCT to explore the real-life effectiveness of CST and to access the perspective of group participants. Individual semi-structured interviews were applied to PlwD who took part in the groups and their care partners (n = 23). The transcripts of interviews were analysed using Framework Analysis. From the analysis, two general themes, Personal benefits of being part of the group and Changes to daily living and 7 subthemes, Benefits for caregivers, Benefits por people with dementia, Memory, Sociability, Language, Mood, Orientation, Everyday activities and Behavioural and psychological symptoms have emerged. Results indicate that CST brings perceived personal benefits to PlwD and caregivers, and there are many perceived improvements, which are consistent with previous qualitative findings and supported by empirical findings from CST trials. The second study aimed to access the experience and perspectives of Plwd who have participated in vCST groups and their care partners (n = 25), during the COVID-19 pandemic. Qualitative information that has emerged from the analysis will be compared with quantitative data to understand the effectiveness and feasibility of vCST. The transcripts of interviews were analysed using Framework Analysis. From the analysis, two general themes, Personal benefits of being part of the group and Design of vCST and 12 subthemes, Enjoyment, Mental stimulation, Continued stimulation, Occupation, Cognition, Mood, Sociability, Online, Duration, Structure of sessions, Person-centred and Evidence-based have emerged. The findings indicate that vCST led to perceived improvements for PlwD and personal benefits for those who took part in the groups. Similar results are found in CST studies, which suggest that vCST is viable as studies have suggested with the face-to-face intervention.