Paper

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.

Notes

Pinned source for the Roitman-Shadlen processed PyDDM CSV used by the random_dot_motion vertical slice. Two macaque subjects, free-response reaction-time variant of the classic random-dot motion 2AFC task.

Curves on shared axes

Findings extracted from this paper, plotted alongside one another.

Compare to the rest of the literature on /findings.

Findings

Finding Curve Species Source level Stratification Points Fits
finding.roitman-shadlen-2002.chronometric.subject.monkey-1 chronometric non-human-primate processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.0
  • ddm-vanilla AIC=1935.0
finding.roitman-shadlen-2002.chronometric.subject.monkey-2 chronometric non-human-primate processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.1
  • ddm-vanilla AIC=2440.1
finding.roitman-shadlen-2002.chronometric chronometric non-human-primate processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.1
  • ddm-drift-bias AIC=4373.4
  • ddm-starting-point-bias AIC=4374.2
  • ddm-vanilla AIC=4373.4
finding.roitman-shadlen-2002.psychometric.subject.monkey-1 psychometric non-human-primate processed-trial — 11
  • ddm-vanilla AIC=1935.0
  • logistic-4param AIC=1933.5
  • sdt-2afc AIC=1926.9
finding.roitman-shadlen-2002.psychometric.subject.monkey-2 psychometric non-human-primate processed-trial — 11
  • ddm-vanilla AIC=2440.1
  • logistic-4param AIC=2432.3
  • sdt-2afc AIC=2437.4
finding.roitman-shadlen-2002.psychometric psychometric non-human-primate processed-trial — 11
  • ddm-drift-bias AIC=4373.4
  • ddm-starting-point-bias AIC=4374.2
  • ddm-vanilla AIC=4373.4
  • logistic-4param AIC=4372.6
  • sdt-2afc AIC=4372.2

Fit parameters

Per-finding fits committed alongside this paper. Parameters, log-likelihood, AIC, and BIC for each variant. Click the finding id for residuals, model-selection winner, and provenance.

finding.roitman-shadlen-2002.chronometric.subject.monkey-1 monkey-1
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.653 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=69.428 · rt_floor=0.000 · rt_span=0.780 -0.0 6.0 5.4
ddm-vanilla boundary=0.925 · drift_per_unit_evidence=0.204 · non_decision_time=0.444 -964.5 1935.0 1952.6
finding.roitman-shadlen-2002.chronometric.subject.monkey-2 monkey-2
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.689 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=36.749 · rt_floor=0.000 · rt_span=0.917 -0.1 6.1 5.5
ddm-vanilla boundary=1.208 · drift_per_unit_evidence=0.182 · non_decision_time=0.358 -1217.1 2440.1 2458.6
finding.roitman-shadlen-2002.chronometric
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.671 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=48.760 · rt_floor=0.000 · rt_span=0.847 -0.0 6.1 5.4
ddm-drift-bias boundary=0.974 · drift_bias=0.044 · drift_per_unit_evidence=0.210 · non_decision_time=0.410 -2182.7 4373.4 4400.3
ddm-starting-point-bias boundary=1.057 · drift_per_unit_evidence=0.194 · non_decision_time=0.410 · starting_point=0.509 -2183.1 4374.2 4401.1
ddm-vanilla boundary=1.057 · drift_per_unit_evidence=0.194 · non_decision_time=0.410 -2183.7 4373.4 4393.6
finding.roitman-shadlen-2002.psychometric.subject.monkey-1 monkey-1
Variant Parameters logL AIC BIC
ddm-vanilla boundary=0.925 · drift_per_unit_evidence=0.204 · non_decision_time=0.444 -964.5 1935.0 1952.6
logistic-4param bias=0.399 · lower_lapse=0.000 · slope=5.307 · upper_lapse=0.000 -962.8 1933.5 1957.0
sdt-2afc criterion=0.041 · d_prime=0.108 -961.5 1926.9 1938.7
finding.roitman-shadlen-2002.psychometric.subject.monkey-2 monkey-2
Variant Parameters logL AIC BIC
ddm-vanilla boundary=1.208 · drift_per_unit_evidence=0.182 · non_decision_time=0.358 -1217.1 2440.1 2458.6
logistic-4param bias=-0.671 · lower_lapse=0.000 · slope=4.451 · upper_lapse=2.40e-3 -1212.2 2432.3 2457.0
sdt-2afc criterion=-0.075 · d_prime=0.124 -1216.7 2437.4 2449.8
finding.roitman-shadlen-2002.psychometric
Variant Parameters logL AIC BIC
ddm-drift-bias boundary=0.974 · drift_bias=0.044 · drift_per_unit_evidence=0.210 · non_decision_time=0.410 -2182.7 4373.4 4400.3
ddm-starting-point-bias boundary=1.057 · drift_per_unit_evidence=0.194 · non_decision_time=0.410 · starting_point=0.509 -2183.1 4374.2 4401.1
ddm-vanilla boundary=1.057 · drift_per_unit_evidence=0.194 · non_decision_time=0.410 -2183.7 4373.4 4393.6
logistic-4param bias=-0.213 · lower_lapse=0.000 · slope=4.876 · upper_lapse=0.000 -2182.3 4372.6 4399.5
sdt-2afc criterion=-0.024 · d_prime=0.116 -2184.1 4372.2 4385.6