39«

APPENDIX

have  mastered  it  in  one  week  and  in  no  case  has  any  clerk  required ­
  more  than  ten  days  to  learn  it.  Many  of  these  tests
are  now  given  by  clerks,  a  thing  which  is  possible  only  because
of  the  care  with  which  this  technique  has  been  worked  out.
The  arithmetical  work  has  been  still  further  simplified  by  means
of  tables.  In  fact,  by  the  time  a  subject  finishes  the  test,  the
examiner  has  almost  finished  computing  the  results.
i.  Eyesight  Test
Description:  The  Lowell  chart  and  the  Jaeger  reading  card
are  used.
Instructions:  The  eyesight  test  should  be  given  by  the  medical
examiner  as  a  part  of  the  physical  examination.  Where
this  is  impracticable,  the  subject  may  simply  be  asked  to
read  or  to  spell  the  lines  on  the  Jaeger  card  and  the  Lowell
chart  according  to  standard  practice,  and  the  results
recorded.
Standards:  The  sharpness  of  sight  required  will  necessarily
depend  on  the  kind  of  work  to  be  done.  No  exact  correlations ­
  between  eyesight  and  production  have  yet  been
established.  The  decision  must  therefore  rest  largely  on
expert  judgment.  For  inspectors,  20/15  or  20/20  is  desirable. ­
  Clerks  can  easily  get  along  with  vision  ranging
anywhere  between  20/15  ar >d  20/40.
Suggestions:  The  importance  of  an  eyesight  test  for  work  requiring ­
  good  eyesight  seems  so  obvious  as  not  to  need  emphasis. ­
  However,  the  number  of  industries  paying  attention ­
  to  this  fact  is  absurdly  small.
2.  Card  Sorting  (simple)
Description:
See  Chapter  II.
Instructions:
“I  am  going  to  give  you  a  pack  of  cards  like  this  (showing
face  of  card  in  sample  pack  of  six)  which  you  are  to  sepa ­