Table 3.
Summary of the analysis of nearest-neighbour distributions for melanopsin-labelled cellsa.
| region | number of cells | nearest neighbour, s.d. (μm) | cell density (cells mm−2) | RIa | DIa | Shapiro–Wilk's W statistic |
|---|---|---|---|---|---|---|
| temporal | 49 | 60.2±43.3 | 61.3 | 0.72 | 0.94 | W=0.872 |
| p=0.98 | p=0.27 | p<0.001 | ||||
| (0.56) | (0.97) | non-normal | ||||
| nasal | 32 | 77.2±39.8 | 40.0 | 0.52 | 0.98 | W=0.948 |
| p=0.30 | p=0.50 | p=0.124 | ||||
| (0.57) | (0.98) | normal | ||||
| dorsal | 33 | 71.9±49.1 | 41.3 | 0.68 | 0.92 | W=0.823 |
| p=0.85 | p=0.27 | p<0.001 | ||||
| (0.59) | (0.98) | non-normal | ||||
| ventral | 32 | 89.5±48.0 | 40.0 | 0.54 | 1.13 | W=0.952 |
| p=0.46 | p=0.99 | p=0.161 | ||||
| (0.56) | (0.96) | normal |
a
The p-values assigned from Monte Carlo tests as described in §2. Values in brackets show the mean value for 100 simulated random distributions (probability of getting equal to or less than the value observed with random distributed data). DI, dispersion index; RI, regularity index.