Table 1.
Summary of the population averages of measures of contrast-dependent clustering
Type of data set and units | No. of units | No. of units: Hmax > Hcount | ΔH/Hcount | Hcount | Hmax | |||
---|---|---|---|---|---|---|---|---|
Dspike,circ | Fall | Feven | Fodd | |||||
Edge | ||||||||
All | 22 | 15 | 0.47 | 0.38 ± 0.26 | 0.56 ± 0.23 | 0.56 ± 0.25 | 0.55 ± 0.27 | 0.48 ± 0.22 |
S | 11 | 6 | 0.33 | 0.36 ± 0.27 | 0.48 ± 0.19 | 0.45 ± 0.21 | 0.45 ± 0.21 | 0.45 ± 0.22 |
Cx | 11 | 9 | 0.60 | 0.40 ± 0.27 | 0.64 ± 0.24 | 0.66 ± 0.26 | 0.66 ± 0.29 | 0.50 ± 0.23 |
Grating | ||||||||
All | 22 | 9 | 0.07 | 0.57 ± 0.27 | 0.60 ± 0.26 | 0.60 ± 0.26 | 0.59 ± 0.27 | 0.60 ± 0.26 |
S | 11 | 5 | 0.08 | 0.53 ± 0.27 | 0.58 ± 0.24 | 0.57 ± 0.23 | 0.55 ± 0.25 | 0.58 ± 0.23 |
Cx | 11 | 4 | 0.05 | 0.60 ± 0.28 | 0.63 ± 0.30 | 0.62 ± 0.30 | 0.62 ± 0.29 | 0.62 ± 0.30 |
ΔH = Hmax − Hcount, the contribution by temporal structure, obtained with the metrics Dspike,circ[q], is averaged across cells before taking the ratio (ΔH/Hcount). Hmax, the average maximal level of clustering, is listed for the metrics Dspike,circ[q] and three families of metrics based on cumulative use of Fourier components: Fall, Feven, and Fodd. The level of chance clustering is subtracted in all cases.