Table 1.

Conditioning related effects on tuning curve parameters for strongly and weakly direction selective groups of neurons

Dataset	Direction selectivity	Cells (n)	p value for Kruskal–Wallis test
			Bandwidth		Direction index
			Quadrant	Axis	Quadrant	Axis
Stat-ref	Low (<0.33)	1120	0.021	0.033	0.14	0.12
Stat-ref	High (≥0.33)	1703	1.4 · 10−5	4.8 · 10−5	<10−6	<10−6
Grey-ref	Low (<0.33)	1804	0.057	0.81	0.00022	0.093
Grey-ref	High (≥0.33)	670	3 · 10−6	<10−6	0.015	0.027

Analysis of the Stat-ref and Grey-ref datasets, split into subgroups exhibiting high (>0.33) and low (<0.33) direction selectivity of the orientation tuning curves. Columns 4–7 show p values from the respective Kruskal–Wallis tests on differences in bandwidth and direction index of the tuning curves between quadrant and orientation axis subgroups. Column 3 shows the total number of neurons included in each comparison. Each control dataset was tested identically to the original dataset.