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
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
can be used to account for response latencies commonly
observed in mental concentration tests.
Pieters, Jo P & Van der Ven, Ad H. (1982). Precision, speed, and distraction in time-limit tests. Applied Psychological Measurement, 6, 93-109. doi:10.1177/014662168200600110
Pieters, Jo P. M.; Van der Ven, Ad H. G. S..
Precision, speed, and distraction in time-limit tests.
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