mt_example_raw: Raw mouse-tracking dataset for demonstrations of the mousetrap package
Description
An exemplary mouse-tracking dataset collected in OpenSesame using the
mousetrap plug-ins. A preprocessed (as opposed to raw) version of the same
data can be found in mt_example.format
A data.frame with 38 rows and 19 variables. The data.frame is
based on the combined raw data that were created using
read_opensesame from the readbulk library. For ease
of use, unnecessary columns were excluded.
The variables included relate to the item that was presented
(Exemplar), the answer categories (Category1 and
Category2), the subject identifier (subject_nr) the subjects'
response (response_get_response), as well as the mouse-tracking
variables (timestamps_get_response, xpos_get_response and
ypos_get_response). Besides, a number of additional variables are
included, e.g., some variables relating to the general settings of the
experiment (e.g., the width and height of the screen in
pixels).
Each mouse-tracking variable contains a list of values (separated by ', ')
- one entry for each recorded position of the mouse. The position
coordinates are given in pixels, such that values of zero for both
xpos_get_response and ypos_get_response indicate that the
cursor is located in the center of the screen. Both variables increase in
value as the mouse moves toward the bottom right. Timestamps are given in
milliseconds.Details
The data stem from a study based on experiment 1 by Dale et al. (2007). In
this experiment, participants have to assign exemplars (e.g., "shark") to one
of two categories (e.g., "fish" or "mammal") by clicking on the button
corresponding to the correct category. All exemplars and categories were
translated to and presented in German.
Across the 19 trials of the experiment, participants categorized 13 exemplars
that were typical of their category and 6 atypical exemplars for which this
was not the case. For the atypical exemplars (e.g., "whale"), the competing
category ("fish") was selected to compete with the correct category
("mammal"). The hypothesis under investigation is whether participants' mouse
trajectories deviate more towards the competing category for the atypical
exemplars, indicating increased conflict between the response options.
Please note that mt_example_raw should only be used for exploring the
features of the mousetrap package and not for any substantive analysis.References
Dale, R., Kehoe, C., & Spivey, M. J. (2007). Graded motor
responses in the time course of categorizing atypical exemplars.
Memory & Cognition, 35(1), 15-28.
Mousetrap