And a study by Warwick University in England found those who had fewer than six hours a night or more than eight had worse memory and decision-making abilities.
Cilmibaadhis hore ay u samaysay jaamacadda Warwick ee dalka Ingiriiska ayaa iyaduna daahfurtay in qofka oo seexdda maalin kasta in ka yar 6 saac ama ka badan 8 saac ay ku keento xusuusta daciifta iyo mushkilado dhinaca awoodda go'aan qaadashada.