The objective of the study was to examine the effectiveness of two types of memory training (collective and individual), compared to control (waiting list), on memory performance, Participants were 139 community-dwelling older individuals recruited through media advertisements asking for people with subjective memory complaints to participate in it study, Data were collected at baseline, and at 1 week and 4 months after the intervention. Training efficacy Was assessed using measures of subjective and objective memory performance. After the intervention, participants in the collective training group reported more stability in memory functioning and had fewer feelings of anxiety and stress about memory functioning. In addition, positive effects were found on objective memory functioning, Compared with the other two groups, the collective training group participants had an improved recall of a previously learned word list. Compared to controls, participants in the individual training group reported fewer feelings of anxiety and stress in relation to memory functioning.
Valentijn, S. A. M., van Hooren, S. A. H., Bosma, J. H. A., Touw, D. M., Jolles, J., van Boxtel, M. P. J., & Ponds, R. W. H. M. (2005). The effect of two types of memory training on subjective and objective memory performance in healthy individuals aged 55 years and older: a randomized controlled trial. Patient Education and Counseling, 57(1), 106-114. https://doi.org/10.1016/j.pec.2004.05.002