▁it ▁also ▁accounts ▁for ▁the ▁fact ▁recognition ▁may ▁not ▁always ▁be ▁superior ▁to ▁recall . ▁ ▁History ▁Philosoph ical ▁questions ▁regarding ▁how ▁people ▁ac quire ▁knowledge ▁about ▁their ▁world ▁sp ur red ▁the ▁study ▁of ▁memory ▁and ▁learning . ▁ ▁Rec all ▁is ▁a ▁major ▁part ▁of ▁the ▁study ▁of ▁memory ▁and ▁often ▁comes ▁into ▁play ▁in ▁all ▁research . ▁For ▁this ▁reason , ▁the ▁main ▁studies ▁on ▁memory ▁in ▁general ▁will ▁also ▁provide ▁a ▁history ▁to ▁the ▁study ▁of ▁recall . ▁ ▁In ▁ 1 8 8 5 , ▁Hermann ▁E bb ing haus ▁created ▁n ons ense ▁sy ll ables , ▁combinations ▁of ▁letters ▁that ▁do ▁not ▁follow ▁gram mat ical ▁rules ▁and ▁have ▁no ▁meaning , ▁to ▁test ▁his ▁own ▁memory . ▁He ▁would ▁memor ize ▁a ▁list ▁of ▁n ons ense ▁sy ll ables ▁and ▁then ▁test ▁his ▁recall ▁of ▁that ▁list ▁over ▁varying ▁time ▁periods . ▁He ▁discovered ▁that ▁memory ▁loss ▁occurred ▁rapidly ▁over ▁the ▁first ▁few ▁hours ▁or ▁days , ▁but ▁showed ▁a ▁more ▁steady , ▁grad ual ▁decl ine ▁over ▁subsequent ▁days , ▁weeks , ▁and ▁months . ▁Furthermore , ▁E bb ing haus ▁discovered ▁that ▁multiple ▁learning , ▁over - learning , ▁and ▁spacing ▁study ▁times ▁increased ▁ret ention ▁of ▁information . ▁ ▁E bb ing haus ' ▁research ▁influenced ▁much ▁of ▁the ▁research ▁conducted ▁on ▁memory ▁and ▁recall ▁throughout ▁the ▁tw enti eth ▁century . ▁ ▁Freder ic ▁Bart lett ▁was ▁a ▁prominent ▁research er ▁in ▁the ▁field ▁of ▁memory ▁during ▁the ▁mid -