Dataset

Palmer-Huk-Shadlen human random-dot motion data from CoSMo2017

MATLAB files distributed by the Drugowitsch Lab CoSMo2017 teaching repository for Experiment 1 of Palmer, Huk, and Shadlen 2005. The files contain signed motion coherence, left/right choice, and reaction time for six human observers after CoSMo2017 preprocessing.

Access notes

The MVP downloads six `phs_*.mat` files plus the source README and license from a pinned CoSMo2017 commit into ignored local raw-data storage.

Data formats

  • MATLAB .mat
  • derived canonical trial tables to be generated

Expected trial-table mapping

Canonical fields the harmonizer expects this dataset to populate.

Canonical field Source mapping
choice `choice` mapped as 0 left and 1 right.
correct Derived from signed coherence and choice using the CoSMo2017 zero-coherence convention.
evidence_strength Absolute percent motion coherence.
response_time `rt` in seconds.
session_id Fixed processed dataset identifier because the CoSMo2017 files are per-subject aggregates.
stimulus_side Positive coherence mapped to right, negative coherence mapped to left, zero coherence mapped to none.
stimulus_value Signed motion coherence percentage, rightward motion positive and leftward motion negative.
subject_id Subject identifier formatted from each `phs_{subject}.mat` file name.
task_variables Source subject id, signed coherence fraction, choice code, and zero-coherence correctness convention.
trial_index Global row index across selected subject files after optional filtering.

Caveats

  • CoSMo2017 removes bad trials and modifies the original data before distribution.
  • CoSMo2017 assigns random choices to zero-coherence trials.
  • Original dataset redistribution terms should be confirmed before committing derived tables.

Papers

Findings

Curves attached to this dataset on shared signed-evidence axes.

See all findings overlaid on shared axes.