Table 2. The statistical output aimed at investigating the relationships between target colours (colour of the tile that the food was on), tank colour, saturation, and stimuli arrangement.

The statistical output of the multinomial logistic regression investigating the relationships between tank colour, saturation and stimuli arrangement on the likelihood that one particular coloured tile was selected. The colour of the tank refers to the tank that the turtles were reared in, and where the individual experiment occurred (blue, grey, white, or red). The saturation refers to the shade of colour for the stimuli (100, 75, 50, or 25%), and the arrangement refers to how the stimuli were organised from left to right (BYR, BRY, YBR, YRB, RBY, RYB).

Variable	LR chi-square	Df	P-value
Tank colour	30.2718	9	0.0004
Saturation	7.6115	3	0.0548
Coloured tile arrangement	21.3232	15	0.1268
Tank colour and saturation	4.3204	9	0.8891