Finding

roitman-shadlen-2002.psychometric.subject.monkey-1

Roitman JD, Shadlen MN. Response of neurons in the lateral intraparietal area during a combined visual discrimination reaction time task. Journal of Neuroscience, 2002, 22(21):9475-9489. · Classic macaque random-dot motion discrimination · psychometric

Observed curve and fits

Joint-fit companions

Other findings jointly fit by the same model fits.

Fit diagnostics

Caveats on these fits (1 term)

Each tag below is attached to one or more candidate fits for this finding. The chip column in the table flags which row carries which tag.

aggregate DDM RT approximation
DDM likelihood uses aggregate chronometric constraints rather than a full trial-level response-time likelihood.
Variant AIC Δ AIC RMSE Caveats
sdt-2afc winner 1926.9 0.0 0.0191 —
logistic-4param 1933.5 6.6 0.0239 —
ddm-vanilla 1935.0 8.1 0.0260
  • aggregate DDM RT approximation
Full diagnostics (logL · n · params · max abs error)
Variant logL n Free params Max |error| Predicted points
sdt-2afc -961.5 2,615 2 0.0370 11
logistic-4param -962.8 2,615 4 0.0441 11
ddm-vanilla -964.5 2,615 3 0.0532 11

Residuals

Fit parameters and provenance

sdt-2afc.roitman-shadlen-2002.psychometric.subject.monkey-1

dirty fit

criterion=0.041 · d_prime=0.108

Method
scipy.optimize.minimize
Commit
24fd416
Predicted points
11
BIC
1938.7

Fitted with scipy.optimize.minimize via behavtaskatlas.model_fits.sdt-2afc; success=True; CONVERGENCE: RELATIVE REDUCTION OF F <= FACTR*EPSMCH

logistic-4param.roitman-shadlen-2002.psychometric.subject.monkey-1

dirty fit

bias=0.399 · lower_lapse=0.000 · slope=5.307 · upper_lapse=0.000

Method
scipy.optimize.minimize
Commit
24fd416
Predicted points
11
BIC
1957.0

Fitted with scipy.optimize.minimize via behavtaskatlas.model_fits.logistic-4param; success=True; CONVERGENCE: RELATIVE REDUCTION OF F <= FACTR*EPSMCH

ddm-vanilla.roitman-shadlen-2002.psychometric.subject.monkey-1

dirty fit

boundary=0.925 · drift_per_unit_evidence=0.204 · non_decision_time=0.444

Method
scipy.optimize.minimize
Commit
67b9019
Predicted points
11
BIC
1952.6

Fitted with scipy.optimize.minimize via behavtaskatlas.model_fits.ddm-vanilla; success=True; CONVERGENCE: RELATIVE REDUCTION OF F <= FACTR*EPSMCH

Observed points

Signed motion coherence p_right n
-51.200 0.0000 219
-25.600 0.0046 217
-12.800 0.0737 217
-6.400 0.2615 218
-3.200 0.3744 219
0.000 0.4468 432
3.200 0.6055 218
6.400 0.7385 218
12.800 0.9406 219
25.600 0.9954 219
51.200 1.0000 219

Take it with you

Cover sheet

Self-contained Markdown for citation, slides, or notebooks

The cover sheet pins the finding to the atlas commit and includes the observed points, fit ranking, caveats, and provenance — everything needed to drop into a paper or notebook without losing the trail back to the deploy.