ation ▁on ▁diver gent ▁thinking , ▁one ▁study ▁by ▁J . A . ▁Hor ne ▁illustrated ▁that ▁even ▁when ▁motiv ation ▁to ▁perform ▁well ▁is ▁maintained , ▁sleep ▁can ▁still ▁impact ▁diver gent ▁thinking ▁performance . ▁ ▁In ▁this ▁study , ▁twelve ▁subjects ▁were ▁dep riv ed ▁of ▁sleep ▁for ▁thirty - two ▁hours , ▁while ▁a ▁control ▁group ▁of ▁twelve ▁others ▁maintained ▁normal ▁sleep ▁routine . ▁Sub ject s ' ▁performance ▁on ▁both ▁a ▁word ▁flu ency ▁task ▁and ▁a ▁challeng ing ▁non ver bal ▁planning ▁test ▁was ▁" sign ific antly ▁imp a ired ▁by ▁sleep ▁loss ", ▁even ▁when ▁the ▁factor ▁of ▁personal ▁motiv ation ▁to ▁perform ▁well ▁was ▁controlled . ▁This ▁study ▁showed ▁that ▁even ▁" one ▁night ▁of ▁sleep ▁loss ▁can ▁affect ▁diver gent ▁thinking ”, ▁which ▁" contr asts ▁with ▁the ▁outcome ▁for ▁conver gent ▁thinking ▁tasks , ▁which ▁are ▁more ▁res il ient ▁to ▁short - term ▁sleep ▁loss ". ▁Research ▁on ▁sleep ▁dep riv ation ▁and ▁diver gent ▁thinking ▁could ▁be ▁further ▁expl ored ▁on ▁a ▁bi ological ▁or ▁chemical ▁level , ▁to ▁identify ▁the ▁reason ▁why ▁cogn itive ▁function ing , ▁as ▁it ▁rel ates ▁to ▁diver gent ▁thinking , ▁is ▁impact ed ▁by ▁lack ▁of ▁sleep ▁and ▁if ▁there ▁is ▁a ▁difference ▁in ▁its ▁impact ▁if ▁subjects ▁are ▁dep riv ed ▁of ▁RE M ▁versus ▁non - RE M ▁sleep . ▁ ▁See ▁also ▁ ▁Later al ▁thinking ▁ ▁References ▁ ▁External ▁links ▁ ▁" Ch anging ▁( E ducation ) ▁Parad ig