▁to ▁the ▁Sur geon ▁General , ▁the ▁Army ▁General ▁Staff , ▁and ▁the ▁Secretary ▁of ▁Def ense . ▁Walter ▁B ingham ' s ▁contribution ▁on ▁the ▁army ▁classification ▁methods ▁p aved ▁the ▁development ▁of ▁the ▁field ▁of ▁industrial ▁psych ology . ▁B ingham ▁carried ▁out ▁editor ial ▁respons ib ilities ▁for ▁several ▁journ als ▁and ▁was ▁the ▁author ▁of ▁over ▁ 2 0 0 ▁articles ▁and ▁books . ▁His ▁" A pt itude ▁and ▁A pt itude ▁Test ing " ▁( 1 9 3 7 / 1 9 4 2 ) ▁is ▁a ▁classic ▁in ▁the ▁field . ▁ ▁Education ▁and ▁early ▁career ▁ ▁Walter ▁Van ▁Dy ke ▁B ingham ▁was ▁born ▁in ▁Sw an ▁Lake ▁City , ▁Iowa ▁to ▁Lem uel ▁and ▁Mar tha ▁B ingham . ▁De emed ▁an ▁exception al ▁student ▁early ▁on , ▁B ingham ▁ski pped ▁the ▁ 3 rd ▁and ▁ 4 th ▁gr ades , ▁gradu ating ▁high ▁school ▁at ▁the ▁age ▁of ▁ 1 6 . ▁He ▁was ▁an ▁industri ous ▁youth , ▁s elling ▁enough ▁pop c orn ▁at ▁the ▁train ▁station ▁to ▁pay ▁his ▁way ▁to ▁Chicago ' s ▁ 1 8 9 3 ▁World ' s ▁Fair . ▁Upon ▁gradu ating ▁from ▁high ▁school , ▁Walter ▁took ▁a ▁job ▁as ▁a ▁rod man ▁on ▁the ▁Bur ling ton , ▁C ed ar ▁Rap ids ▁and ▁Northern ▁Railway . ▁His ▁first ▁job ▁outside ▁of ▁the ▁home ▁was ▁a ▁printer ' s ▁devil , ▁in king ▁forms ▁for ▁the ▁week ly ▁edition ▁of ▁the