▁at ▁Clark ▁University ▁in ▁ 1 9 3 8 , ▁C att ell ▁was ▁recommended ▁by ▁Thor nd ike ▁and ▁was ▁appointed ▁to ▁the ▁position . ▁However , ▁he ▁conducted ▁little ▁research ▁there ▁and ▁was ▁" cont in ually ▁de pressed ." ▁C att ell ▁was ▁invited ▁by ▁Gordon ▁All port ▁to ▁join ▁the ▁Harvard ▁University ▁fac ulty ▁in ▁ 1 9 4 1 . ▁While ▁at ▁Harvard ▁he ▁began ▁some ▁of ▁the ▁research ▁in ▁person ality ▁that ▁would ▁become ▁the ▁foundation ▁for ▁much ▁of ▁his ▁later ▁scientific ▁work . ▁ ▁During ▁World ▁War ▁II , ▁C att ell ▁served ▁as ▁a ▁civil ian ▁consult ant ▁to ▁the ▁U . S . ▁government ▁research ing ▁and ▁developing ▁tests ▁for ▁selecting ▁officers ▁in ▁the ▁armed ▁forces . ▁C att ell ▁returned ▁to ▁teaching ▁at ▁Harvard ▁and ▁married ▁Al berta ▁Kar en ▁Sch u ett ler , ▁a ▁Ph . D ▁student ▁in ▁mathematics ▁at ▁Rad cl iffe ▁College . ▁Over ▁the ▁years , ▁she ▁worked ▁with ▁C att ell ▁on ▁many ▁aspects ▁of ▁his ▁research , ▁writing , ▁and ▁test ▁development . ▁They ▁had ▁three ▁daughters ▁and ▁a ▁son . ▁They ▁divor ced ▁in ▁ 1 9 8 0 . ▁ ▁Herbert ▁Wood row , ▁professor ▁of ▁psych ology ▁at ▁the ▁University ▁of ▁Illinois ▁at ▁U rb ana - Ch amp aign , ▁was ▁searching ▁for ▁someone ▁with ▁a ▁background ▁in ▁mult ivari ate ▁methods ▁to ▁establish ▁a ▁research ▁labor atory . ▁C att ell ▁was ▁invited ▁to ▁assume ▁this ▁position ▁in ▁ 1