ABSTRACT
A prominent general factor of aptitude for all jobs appears to be compounded of g, v:ed, and a drive component closely related to X. Beyond this, job abilities group into the more bookish and the more practical, and possibly other major types. But the scope of these group factors is probably small compared with that of minor group or specific factors. Hence transfer of ability from one specialized type of work to another is limited. Also the overlapping between factors established among tests and job factors is disappointing, so that vocational guidance (as distinct from selection) cannot hope to advance very far merely by trying to predict aptitude for general types of work from scores on a battery of tests.
