Browsing by Author "Van der Ven, Ad H. G. S."
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Item Inhibition in prolonged work tasks(1989) Van der Ven, Ad H. G. S.; Smit, J. C.; Jansen, R. W. T. L.A new model is presented that explains reaction time fluctuations in prolonged work tasks. The model extends the so-called Poisson-Erlang model and can account for long-term trend effects in the reaction time curve. The model is consistent with Spearman’s hypothesis that inhibition increases during work and decreases during rest. Predictions concerning the long-term trend were tested against data from the Bourdon-Vos cancellation test. The long-term trend in the mean and in the variance was perfectly described by the model. A goodness-of-fit test comparing frequency distributions of observed reaction and simulated reaction times was also supported by the model. Index terms: concentration, continuous work, distraction, inhibition, prolonged work, reaction time, response time.Item Precision, speed, and distraction in time-limit tests(1982) Pieters, Jo P. M.; Van der Ven, Ad H. G. S.Three models are presented that account for the effects of speed and precision in mental test scores as measured by time-limit intelligence tests. To estimate precision, it is shown that the Rasch model- and, as a special case, the binomial error model -can be used, focusing on the number of items correct and the number of items attempted (usually considered as estimators of these effects). To estimate speed, a model called the Poisson-Erlang model is presented. It is shown that speed can be analyzed into two components: processing time and distraction time. Parameters of the Poisson-Erlang model are used to estimate these components. An outline is given of a new method for analyzing time-limit tests, combining the different models. In addition, it is shown that the Poisson-Erlang model can be used to account for response latencies commonly observed in mental concentration tests.