Functional Localizer Tasks

Collected during ses-02, ses-03, and sometimes ses-30 (makeup runs).

BIDS task label Description
task-prf Population receptive field mapping (typically 3 runs)
task-floc Functional localizer (3-6 runs)
task-auditory Auditory stimulation
task-tone Tonotopy (1-2 runs)
task-motor Motor task (2 runs, ses-30)
task-fixation Fixation baseline (ses-30)

These labels are expected to remain unchanged.

PRF

  • 3 runs for each session
  • Order to run (93=multibar, 94=wedgeringmash):
    • Run 1: 93, 94, 93
    • Run 2: 94, 93, 94
  • Code adapted from http://kendrickkay.net/analyzePRF/
  • Two run types were used: multibar and wedgering. The first, termed ‘multibar’, involves bars sweeping in multiple directions (same as RETBAR in the Human Connectome Project 7T Retinotopy Dataset). The second, termed ‘wedgering’, involves a combination of rotating wedges and expanding and contracting rings.
  • A total of 6 runs (3 multibar and 3 wedgering) were collected across two functional localizer sessions. Each run lasted 300 s.
  • The acquisition structure was [MWM] for the first localizer session, and [WMW] for the second localizer session. M indicates a multibar run and W indicates a wedgering run.
  • Stimuli filled a circular region with diameter 10.6°. Throughout the stimulus presentation, a small semi-transparent dot (0.2° × 0.2°) was present at the center of the stimuli.
  • Participants were instructed to maintain fixation on a central dot (switched randomly to one of three colors: black, white, or red, every 1–5 s) and press a button whenever the color of the dot changes.

fLoc

  • 3 runs for each session

Motor Localizer

  • 1 run for the 2nd localizer session and during the final cued recall session

Auditory Category Localizer

  • 1 run for the 1st localizer session and during the final cued recall session

Tonotopy Mapping

  • 1 run for each session
  • Order to run (low to high or high to low):
    • Run 1: low to high
    • Run 2: high to low