Basing hypotheses on interpretations of 12 personality factors most replicated in 10 past researches with children, this experiment sets up about eight subtests as specific markers for each. (Editor)

In the card-punch operating training described here, it seems that extraversion is more important in job success in the early stages of training and clerical aptitude less so, with the relative importance of these attributes being reversed at a later stage. (Authors)

These findings are discussed in the light of earlier findings with the PEPI and some tentative explanations for the observed national differences are suggested. (Authors)

Somindence (sober mature independence) is found in the stolid, mature, independent; and by contrast, dissofrustance (dissociative rejection of frustrating ideas) characterizes the more careful, less enthusiastic person with increased dependence on external control. (Author/MB)