speed {depmixS4}

Speed Accuracy Switching Data

Description

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.

Corresponding author: [e-mail]

Examples

data(speed)
## maybe str(speed) ; plot(speed) ...