Table 2 Parameters of the LAM fits to the position noise data shown in Fig. 3b. For further details see Table 1. In linear units, the mean equivalent internal noise is 3.0 arcmin. The efficiency is 21% of the ideal observer.

From: The equivalent internal orientation and position noise for contour integration

Observer log2 β − log2 β ideal log2 σ int (arcmin) RMSe
S1 −2.16 ± 0.09 1.6 ± 0.2 0.03
S2 −2.26 ± 0.09 1.6 ± 0.1 0.12
S3 −2.17 ± 0.08 1.2 ± 0.1 0.30
S4 −2.02 ± 0.10 1.6 ± 0.2 0.10
S5 −2.61 ± 0.12 1.9 ± 0.2 0.16
Mean −2.25 ± 0.10 1.6 ± 0.1 0.11