This data set is a bivariate series of response times and accuracy
scores of a single participant switching between slow/accurate
responding and fast guessing on a lexical decision task. The slow and
accurate responding, and the fast guessing can be modelled using two
states, with a switching regime between them. The dataset further
contains a third variable called Pacc, representing the relative
pay-off for accurate responding, which is on a scale of zero to one.
The value of Pacc was varied during the experiment to induce the
switching. This data set is a from participant A in experiment
1a from Dutilh et al (2011).
Usage
data(speed)
Format
A data frame with 439 observations on the following 4 variables.
rt
a numeric vector of response times (log ms)
corr
a numeric vector of accuracy scores (0/1)
Pacc
a numeric vector of the pay-off for accuracy
prev
a numeric vector of accuracy scores (0/1)
on the previous trial
Source
Gilles Dutilh, Eric-Jan Wagenmakers, Ingmar Visser, & Han L. J. van der Maas (2011).
A phase transition model for the speed-accuracy trade-off in response time experiments.
Cognitive Science, 35:211-250.