Monetary Incentive Delay Task

This is a reimplementation of the Monetary Incentive Delay task [Knutson et al., 2000], that is also used in the ABCD study [Casey et al., 2018].

For this project the graph structure is the following:

    environment_graph = {
        0: {0: ([1, 2, 3, 4, 5], 0.2), "skip": True},
        1: [8, 6],  # big lose
        2: [8, 7],  # small lose
        3: [8, 8],  # control
        4: [9, 8],  # small win
        5: [10, 8],  # small lose
        6: [],  # big lose - lose
        7: [],  # small lose - lose
        8: [],  # nothing
        9: [],  # small win - win
        10: [],  # large win - win

Or in graph form:

(Source code, png, hires.png, pdf)

../_images/mid-1.png

Task description

In this task, participants are asked to hit a target in time.

First they are presented with a cue, that indicates the potential win, or the loss to be avoided.

After a short while, the participant needs to press space in time, in response to a target stimulus.

If the participant’s response is in time, they either win or avoid the loss indicated by the stimulus.

There are 5 cues, two win conditions of different magnitude, a neutral condition with no outcome and two loss conditions.

As can be seen in the graph, the task is controlled by the agent_location or starting_position in that each cueing condition, has a separate graph structure.

[CCC+18]

B.J. Casey, Tariq Cannonier, May I. Conley, Alexandra O. Cohen, Deanna M. Barch, Mary M. Heitzeg, Mary E. Soules, Theresa Teslovich, Danielle V. Dellarco, Hugh Garavan, Catherine A. Orr, Tor D. Wager, Marie T. Banich, Nicole K. Speer, Matthew T. Sutherland, Michael C. Riedel, Anthony S. Dick, James M. Bjork, Kathleen M. Thomas, Bader Chaarani, Margie H. Mejia, Donald J. Hagler, M. Daniela Cornejo, Chelsea S. Sicat, Michael P. Harms, Nico U.F. Dosenbach, Monica Rosenberg, Eric Earl, Hauke Bartsch, Richard Watts, Jonathan R. Polimeni, Joshua M. Kuperman, Damien A. Fair, and Anders M. Dale. The Adolescent Brain Cognitive Development (ABCD) study: Imaging acquisition across 21 sites. Developmental Cognitive Neuroscience, 32:43–54, August 2018. doi:10.1016/j.dcn.2018.03.001.

[KWKH00]

Brian Knutson, Andrew Westdorp, Erica Kaiser, and Daniel Hommer. FMRI Visualization of Brain Activity during a Monetary Incentive Delay Task. NeuroImage, 12(1):20–27, July 2000. doi:10.1006/nimg.2000.0593.