Individual differences in speed of retrieval from semantic memory

In the first of two experiments, the stimulus items consisted of category names followed by a single letter (e.g., fruit-P). The subjects (half introverted, half extraverted) were required to respond as quickly as possible with a member of the specified category starting with the letter. Extraverts responded significantly faster than introverts, and more so when the most likely response was of low frequency than when it was of high frequency. In the second experiment, subjects were assigned to one of four groups representing the four combinations of high and low Extraversion and high and low General Activation. The speed-of-recall task from the first experiment was used on some trials; on the remaining trials, a speed-of-recognition task was used. Extraverts had greater response speed than introverts for recall, but not for recognition. That finding, plus interactions between Extraversion and General Activation, suggested an interpretation of the results in terms of the Yerkes-Dodson Law.     

Notes and shorter communications: Psychoticism and unemployment

The Eysenck Personality Questionnaire (EPQ) was given to male skilled and semi-skilled workers facing redundancy, in an attempt to ascertain whether any of the factors measured contributed towards a predispositional tendency for unemployment. Psychoticism was found to be a sound predictor of future work status for the school group, whilst no differences of merit were noted for any variable for the redundant group. The results are discussed in relation to other findings with regard to EPQ trait factors, and in particular to Psychoticism.