Boosting behavioral adaptability to enhance older adults’ mental health/well-being and quality of life using a habit-based metacognitive self-help intervention

Pre-registered, partly retrospectively. This study was pre-registered before the major part of the data was collected, created, and realized. Only a small part of the data of some participants (comprising the baseline and other pre-intervention measures), and the full dataset of the first few participants, was collected prior to registration, but it was not accessed yet. See: https://osf.io/5b9xz , but also Brinkhof et al. (2023).