▁best ▁known ▁as ▁an ▁early ▁pione er ▁in ▁the ▁study ▁of ▁re product ive ▁behavior ▁and ▁ne uro end ocr in ology ▁( 1 9 2 0 s - 1 9 4 0 s ). ▁She ▁later ▁worked ▁as ▁a ▁clin ical ▁psych ologist ▁in ▁the ▁New ▁York ▁State ▁health ▁system ▁and ▁at ▁the ▁V eter an ' s ▁Administration ▁Hospital ▁in ▁Perry ▁Point , ▁Maryland ▁( late ▁ 1 9 4 0 s - 1 9 6 7 ). ▁ ▁Education ▁ ▁Ball ▁earned ▁her ▁A . B . ▁from ▁Columbia ▁University ▁in ▁ 1 9 2 2 . ▁She ▁then ▁worked ▁as ▁an ▁assistant ▁in ▁psych ology ▁for ▁Karl ▁L ash ley ▁at ▁the ▁University ▁of ▁Minnesota ▁from ▁ 1 9 2 3 – 1 9 2 6 . ▁In ▁ 1 9 2 6 , ▁Ball ▁published ▁her ▁first ▁paper ▁in ▁" The ▁female ▁sex ▁cycle ▁as ▁a ▁factor ▁in ▁learning ▁in ▁the ▁rat ," ▁one ▁of ▁the ▁first ▁papers ▁on ▁the ▁role ▁of ▁h orm ones ▁in ▁learning ▁and ▁memory . ▁She ▁also ▁later ▁published ▁a ▁study ▁with ▁L ash ley , ▁“ Sp inal ▁condu ction ▁and ▁kin est h etic ▁sens itivity ▁in ▁the ▁ma ze ▁habit ,” ▁which ▁demonstrated ▁that ▁r ats ▁trained ▁to ▁run ▁a ▁ma ze ▁can ▁still ▁run ▁the ▁ma ze ▁without ▁af fer ent ▁sens ory ▁input ▁via ▁the ▁sp inal ▁cord . ▁ ▁From ▁January ▁to ▁June ▁ 1 9 2 4 , ▁Ball ▁accompanied ▁Robert ▁Y erk es ▁on ▁the