Participants performed the color-word version of the Stroop task with three conditions (congruent, incongruent, and neutral) while in the MR scanner. Participants were instructed to ignore the meaning of the printed word and respond to the ink color in which the word was printed. Each condition was meant to elicit a certain level of attentional demand. Participants responded to ink color by pressing button under the index, middle, and ringe fingers on their right hand. One button for each color (red, green, and blue) on an MR-safe response box. Task begins with a 1,000ms fixation cross followed by the stroop stimulus for 2,000ms. The interstimulus interval between successive trial starts was sampled from an exponential distribution, between 3 and 20 s with a mean of 4 s and a median of 3 s, in order to ensure accurate deconvolution of the hemodynamic response. Conditions were pseudorandomized in an event related fashion. 120 trials were presented to each participant. Stimuli were back projected on a screen located at the back of the MR bore with an MR safe projector. Participants used a mirror attached at the top of the head coil to view. This study using response time as a behavioral variable.
- Timothy D. Verstynen
Contact Information:Name: Timothy D. Verstynen
Acknowledgements and Funding:
The author thanks Daniel Weissman and Jean Vettel for their helpful comments on the initial phases of this study, Kirk Erickson for supplying the experimental task used in this study, and Kevin Jarbo, Patrick Buekema, David Creswell, and Fang-Cheng Yeh for their critiques on early versions of the manuscript. This research was sponsored in part by Pennsylvania Department of Health Formula Award SAP4100062201 and by the Army Research Laboratory under Cooperative Agreement Number W911NF-10-2-0022.
External Publication Links:The organization and dynamics of corticostriatal pathways link the medial orbitofrontal cortex to future behavioral responses
Siemen's Verio 3T with 32 channel head coil
How to cite this dataset:
In addition to any citation requirements in the dataset summary please use the following to cite this dataset:
This data was obtained from the OpenfMRI database. Its accession number is ds000164
Direct Links to data:
Revision: 1.0.1 Date Set: May 17, 2017, 6:43 p.m.
- Clarified on voxel size for functional files in README
Revision: 1.0.0 Date Set: Dec. 12, 2016, 10:47 p.m.
- Initial release