Longitudinal impact and effects of booster sessions in a cognitive training program for healthy older adults.

Unlabelled: This paper reports the results from a 3-year follow-up study to measure the long-term efficacy of a cognitive training for healthy older adults and investigates the effects of booster sessions using an entropy-based metric.

Design: semi-randomized quasi-experimental controlled design.

Participants: 50 older adults, (M = 73.