Paper

Palmer J, Huk AC, Shadlen MN. The effect of stimulus strength on the speed and accuracy of a perceptual decision. Journal of Vision, 2005, 5(5):376-404.

Notes

Original paper for the human random-dot motion reaction-time experiment; the data made publicly available at the 2017 CoSMo summer school is the source for the human_random_dot_motion vertical slice.

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.palmer-huk-shadlen-2005.chronometric.subject.phs-ah chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.1
  • ddm-vanilla AIC=295.6
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-eh chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.1
  • chronometric-hyperbolic-rt AIC=6.3
  • ddm-vanilla AIC=468.0
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-jd chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.1
  • ddm-vanilla AIC=321.8
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-jp chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.2
  • ddm-vanilla AIC=301.2
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-mk chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.2
  • ddm-vanilla AIC=332.7
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-mm chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.3
  • ddm-vanilla AIC=460.2
finding.palmer-huk-shadlen-2005.chronometric chronometric human processed-trial — 6
  • chronometric-constant-rt AIC=8.0
  • chronometric-hyperbolic-rt AIC=6.1
  • ddm-drift-bias AIC=2239.2
  • ddm-starting-point-bias AIC=2240.2
  • ddm-vanilla AIC=2238.2
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-ah psychometric human processed-trial — 11
  • ddm-vanilla AIC=295.6
  • logistic-4param AIC=289.3
  • sdt-2afc AIC=283.1
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-eh psychometric human processed-trial — 11
  • ddm-vanilla AIC=468.0
  • logistic-4param AIC=468.1
  • sdt-2afc AIC=462.2
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-jd psychometric human processed-trial — 11
  • ddm-vanilla AIC=321.8
  • logistic-4param AIC=316.3
  • sdt-2afc AIC=310.4
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-jp psychometric human processed-trial — 11
  • ddm-vanilla AIC=301.2
  • logistic-4param AIC=298.6
  • sdt-2afc AIC=295.2
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-mk psychometric human processed-trial — 11
  • ddm-vanilla AIC=332.7
  • logistic-4param AIC=332.9
  • sdt-2afc AIC=326.9
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-mm psychometric human processed-trial — 11
  • ddm-vanilla AIC=460.2
  • logistic-4param AIC=455.5
  • sdt-2afc AIC=452.4
finding.palmer-huk-shadlen-2005.psychometric psychometric human processed-trial — 11
  • ddm-drift-bias AIC=2239.2
  • ddm-starting-point-bias AIC=2240.2
  • ddm-vanilla AIC=2238.2
  • logistic-4param AIC=2238.6
  • sdt-2afc AIC=2247.0

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.palmer-huk-shadlen-2005.chronometric.subject.phs-ah phs-ah
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.681 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=8.159 · rt_floor=0.247 · rt_span=0.856 -0.0 6.1 5.5
ddm-vanilla boundary=1.417 · drift_per_unit_evidence=0.271 · non_decision_time=0.357 -144.8 295.6 308.5
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-eh phs-eh
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.718 -3.0 8.1 7.9
chronometric-hyperbolic-rt half_saturation_strength=49.079 · rt_floor=0.000 · rt_span=0.907 -0.1 6.3 5.7
ddm-vanilla boundary=1.044 · drift_per_unit_evidence=0.138 · non_decision_time=0.434 -231.0 468.0 481.0
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-jd phs-jd
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.516 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=9.083 · rt_floor=0.314 · rt_span=0.383 -0.0 6.1 5.5
ddm-vanilla boundary=0.915 · drift_per_unit_evidence=0.379 · non_decision_time=0.372 -157.9 321.8 334.8
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-jp phs-jp
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.608 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=21.866 · rt_floor=0.189 · rt_span=0.625 -0.1 6.2 5.6
ddm-vanilla boundary=1.125 · drift_per_unit_evidence=0.325 · non_decision_time=0.398 -147.6 301.2 314.2
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-mk phs-mk
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.561 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=12.798 · rt_floor=0.290 · rt_span=0.465 -0.1 6.2 5.5
ddm-vanilla boundary=0.990 · drift_per_unit_evidence=0.325 · non_decision_time=0.386 -163.3 332.7 345.7
finding.palmer-huk-shadlen-2005.chronometric.subject.phs-mm phs-mm
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.685 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=42.152 · rt_floor=0.227 · rt_span=0.593 -0.1 6.3 5.7
ddm-vanilla boundary=0.867 · drift_per_unit_evidence=0.178 · non_decision_time=0.494 -227.1 460.2 473.2
finding.palmer-huk-shadlen-2005.chronometric
Variant Parameters logL AIC BIC
chronometric-constant-rt rt_level=0.617 -3.0 8.0 7.8
chronometric-hyperbolic-rt half_saturation_strength=20.491 · rt_floor=0.225 · rt_span=0.592 -0.1 6.1 5.5
ddm-drift-bias boundary=0.917 · drift_bias=7.87e-3 · drift_per_unit_evidence=0.260 · non_decision_time=0.407 -1115.6 2239.2 2263.7
ddm-starting-point-bias boundary=0.998 · drift_per_unit_evidence=0.239 · non_decision_time=0.409 · starting_point=0.502 -1116.1 2240.2 2264.7
ddm-vanilla boundary=0.998 · drift_per_unit_evidence=0.239 · non_decision_time=0.409 -1116.1 2238.2 2256.6
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-ah phs-ah
Variant Parameters logL AIC BIC
ddm-vanilla boundary=1.417 · drift_per_unit_evidence=0.271 · non_decision_time=0.357 -144.8 295.6 308.5
logistic-4param bias=-1.019 · lower_lapse=0.000 · slope=2.581 · upper_lapse=0.000 -140.6 289.3 306.6
sdt-2afc criterion=-0.243 · d_prime=0.226 -139.6 283.1 291.8
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-eh phs-eh
Variant Parameters logL AIC BIC
ddm-vanilla boundary=1.044 · drift_per_unit_evidence=0.138 · non_decision_time=0.434 -231.0 468.0 481.0
logistic-4param bias=-0.691 · lower_lapse=0.000 · slope=6.955 · upper_lapse=0.000 -230.1 468.1 485.4
sdt-2afc criterion=-0.063 · d_prime=0.084 -229.1 462.2 470.9
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-jd phs-jd
Variant Parameters logL AIC BIC
ddm-vanilla boundary=0.915 · drift_per_unit_evidence=0.379 · non_decision_time=0.372 -157.9 321.8 334.8
logistic-4param bias=-1.003 · lower_lapse=0.000 · slope=2.865 · upper_lapse=0.000 -154.1 316.3 333.6
sdt-2afc criterion=-0.220 · d_prime=0.202 -153.2 310.4 319.1
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-jp phs-jp
Variant Parameters logL AIC BIC
ddm-vanilla boundary=1.125 · drift_per_unit_evidence=0.325 · non_decision_time=0.398 -147.6 301.2 314.2
logistic-4param bias=0.793 · lower_lapse=0.000 · slope=2.713 · upper_lapse=0.000 -145.3 298.6 315.9
sdt-2afc criterion=0.172 · d_prime=0.207 -145.6 295.2 303.8
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-mk phs-mk
Variant Parameters logL AIC BIC
ddm-vanilla boundary=0.990 · drift_per_unit_evidence=0.325 · non_decision_time=0.386 -163.3 332.7 345.7
logistic-4param bias=0.396 · lower_lapse=0.000 · slope=3.132 · upper_lapse=0.000 -162.4 332.9 350.3
sdt-2afc criterion=0.074 · d_prime=0.186 -161.5 326.9 335.6
finding.palmer-huk-shadlen-2005.psychometric.subject.phs-mm phs-mm
Variant Parameters logL AIC BIC
ddm-vanilla boundary=0.867 · drift_per_unit_evidence=0.178 · non_decision_time=0.494 -227.1 460.2 473.2
logistic-4param bias=1.748 · lower_lapse=0.000 · slope=6.430 · upper_lapse=0.000 -223.8 455.5 472.9
sdt-2afc criterion=0.159 · d_prime=0.088 -224.2 452.4 461.0
finding.palmer-huk-shadlen-2005.psychometric
Variant Parameters logL AIC BIC
ddm-drift-bias boundary=0.917 · drift_bias=7.87e-3 · drift_per_unit_evidence=0.260 · non_decision_time=0.407 -1115.6 2239.2 2263.7
ddm-starting-point-bias boundary=0.998 · drift_per_unit_evidence=0.239 · non_decision_time=0.409 · starting_point=0.502 -1116.1 2240.2 2264.7
ddm-vanilla boundary=0.998 · drift_per_unit_evidence=0.239 · non_decision_time=0.409 -1116.1 2238.2 2256.6
logistic-4param bias=-7.99e-3 · lower_lapse=1.31e-3 · slope=4.142 · upper_lapse=0.000 -1115.3 2238.6 2263.1
sdt-2afc criterion=-5.96e-3 · d_prime=0.133 -1121.5 2247.0 2259.2