language {ssMousetrack}

Mouse-tracking experiment of a lexical decision task

Description

This dataset contains a subset of data originally presented in Barca & Pezzullo (2012). In this task participants see a printed stimulus on the screen (e.g., water) and are requested to perform a dichotomous choice task where the stimulus can be classified as word or non-word. The experimental variable is the stimulus type with four categorical levels (i.e., high-frequency word, low-frequency word, pseudowords, and strings of letters). Participants have to classify each stimulus as belonging to word or non-word categories.

The dataset contains five participants (I=5), each measured along three trials, one categorical variable (Q=1) with four levels (K=4). The total number of trials is J=12. Mouse-tracking trajectories have previously been pre-processed with N=101 timesteps, translated into the first quadrant, and rotated so that the Target point (y_T) is always on the right-side.

Usage

language

Format

A long-format dataframe of 6060 observations containing information on the following variables.

sbj

The ID number of participants

condition

A factor of levels HF, LF, PW, NW indicating the type of stimulus

timestep

The ID number of the recorded x-y trajectories

x

The recorded x-trajectories

y

The recorded y-trajectories

trial

The ID number of trials

Source

Barca, L., & Pezzulo, G. (2012). Unfolding visual lexical decision in time. PloS one, 7(4), e35932.