Role of Concentration in Simple Mental Tasks: An Experimental Test of Some Models

摘要

To explain response time (RT) fluctuations in continuous performance on routine mental tasks such as concentration and mental speed tests, Pieters and Van der Ven (1982) proposed the Poisson-Erlang model. The model assumes that RT fluctuations on such tasks are mainly due to distractions. Van der Ven, Smit and Jansen (1987) developed a modification of the Poisson-Erlang model, the Inhibition model, which can accomodate monotone trend in RT-series. The present experiment served to test both models as well as the distraction hypothesis in general. Subjects were given the Bourdon concentration test in an experimental format. Experimental factors were massed vs spaced work and a bonus for improvement of speed without loss of precision. The results support the distraction hypothesis and globally the models as well, although the models need some modification. Implications for RT studies as well as mental testing are discussed, and some suggestions are given for extending the models.