Table 3 Experiment 1 and 2 mean parameter estimates for Model 1 (full model on drift rate, boundary separation and non-decision time), Model 4 (full model on boundary separation and non-decision time, but only an effect of set size on the drift rate) and Model 5 (full model on non-decision time, but only an effect of set size on drift rate and boundary separation) and [2.5 to 97.5] quartiles for the posterior distributions

Exp 1

 Model 1

  Soft

2.60 [2.45 to 2.75]

1.73 [1.60 to 1.87]

1.81 [1.65 to 1.97]

2.02 [1.85 to 2.19]

0.58 [0.55 to 0.61]

0.71 [0.67 to 0.74]

  Stiff

2.57 [2.43 to 2.71]

1.86 [1.72 to 1.99]

2.16 [1.99 to 2.35]

2.26 [2.09 to 2.43]

0.62 [0.59 to 0.66]

0.80 [0.76 to 0.83]

 Model 4

  Soft

2.57 [2.44 to 1.94]

1.78 [1.66 to 2.18]

1.78 [1.61 to 2.71]

2.01 [1.86 to 1.91]

0.58 [0.55 to 0.61]

0.70 [0.67 to 0.74]

  Stiff

2.57 [2.44 to 2.32]

1.78 [1.66 to 2.37]

2.14 [1.98 to 2.71]

2.20 [2.04 to 1.91]

0.62 [0.59 to 0.66]

0.80 [0.76 to 0.83]

Exp 2

 Model 4

  Soft

1.89 [1.76 to 2.03]

1.32 [1.19 to 1.45]

1.86 [1.65 to 2.07]

2.35 [2.13 to 2.59]

1.07 [1.02 to 1.12]

1.23 [1.16 to 1.29]

  Stiff

1.89 [1.76 to 2.03]

1.32 [1.19 to 1.45]

2.02 [1.81 to 2.23]

2.48 [2.24 to 2.73]

1.12 [1.06 to 1.17]

1.28 [1.21 to 1.34]

 Model 5

  Soft

1.87 [1.71 to 2.03]

1.42 [1.26 to 1.58]

2.15 [1.87 to 2.46]

2.63 [2.31 to 2.98]

1.06 [1.00 to 1.11]

1.20 [1.14 to 1.26]

  Stiff

1.87 [1.71 to 2.03]

1.42 [1.26 to 1.58]

2.15 [1.87 to 2.46]

2.63 [2.31 to 2.98]

1.14 [1.08 to 1.19]

1.26 [1.19 to 1.32]