The Effect of Solving Jigsaw Puzzles on Visuospatial Cognition in Older Adults: Jigsaw Puzzles As Cognitive Enrichment

"Intervention period 1: Participants are asked to solve jigsaw puzzles at home 6 times per week for at least 1 hour over a period of 5 weeks.~Intervention period 2 (voluntary): Participants receive the possibility to solve jigsaw puzzles free-of-charge at home for a period of at least 3 month before the 1.5-year follow-up."

Cognitive health counseling regarding modifiable risk and protective factors of cognitive decline and dementia at baseline, and four telephone calls for expert monitoring (three calls during the 5-week period between pre- and posttest, and one call 12 month later)