PART  I

PSYCHOLOGICAL  TESTS
The  practical  possibilities  of  psychological  tests  are  now
generally  conceded,  both  by  the  professional  psychologist
and  the  industrial  layman.  Thus  far,  however,  the
applications  of  these  tests  to  industry,  particularly  in
respect  to  employment,  have  been  fragmentary  and  intangible. ­
  Before  industrial  leaders  will  commit  themselves ­
  to  any  definite  psychological  program  they  demand ­
  a  concrete  account  of  the  tangible  results  arising
from  a  thorough  and  comprehensive  application  of  psychological ­
  tests  to  typical  industrial  problems.
Part  I  is  devoted  largely  to  such  an  account.  It  describes ­
  the  results  obtained  from  the  application  of  psychological ­
  tests  to  employment  problems  under  typical
industrial  conditions.  Moreover,  it  describes  the  method
by  which  these  results  were  obtained.  Results  in  themselves ­
  are  of  little  value  unless  they  are  secured  by
a  method  which  will  produce  similar  results  when  applied
elsewhere.  For  that  reason  special  pains  are  taken  to
make  clear  the  steps  by  which  the  results  were  reached.
The  psychologist  not  familiar  with  shop  and  office  conditions ­
  will  find  these  steps  very  valuable  when  he  attempts ­
  to  make  his  own  applications  to  industrial  problems. ­
  The  industrial  layman  who  is  not  familiar  with
the  exact  methods  of  psychology  will  find  them  a  practical ­
  guide  in  estimating  the  value  of  attempts  made  to
install  psychological  methods  in  his  special  domain.
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