Table 2.

Attentional weights to individual features for all subjects that did not exhibit maximal selectivity

			Features Rank Ordered
		Entropy	1st	2nd	3rd	4th	5th	6th	7th
Human	DPC_19	0.260	0.884*	0.074	0.011	0.009	0.009	0.007	0.006
	DPC_16	0.396	0.716*	0.239	0.030	0.009	0.003	0.002	0.002
	DPS2_5	0.409	0.750*	0.144	0.091	0.008	0.005	0.001	0.001
	DPS3_2	0.449	0.768*	0.098	0.064	0.036	0.022	0.007	0.005
	DPS3_5	0.602	0.682*	0.089	0.069	0.060	0.038	0.032	0.029
Pigeon	62B	0.232	0.891 *	0.075	0.019	0.005	0.005	0.004	0.000
	75B	0.274	0.853 *	0.115	0.013	0.010	0.007	0.001	0.001
	14W	0.351	0.806 *	0.122	0.008	0.007	0.054	0.001	0.003
	27Y	0.408	0.793 *	0.090	0.048	0.044	0.019	0.004	0.002
	76B	0.562	0.597 *	0.213	0.123	0.063	0.002	0.001	0.000
	66Y	0.628	0.552 *	0.197	0.144	0.088	0.019	0.001	0.000
	3W	0.636	0.575 *	0.220	0.114	0.030	0.028	0.020	0.012
	29B	0.672	0.417 *	0.325	0.181	0.048	0.021	0.008	0.000
	57Y	0.699	0.460 *	0.221	0.179	0.104	0.034	0.001	0.000
	83Y	0.704	0.540	0.180	0.111	0.088 *	0.054	0.019	0.008
	44W	0.726	0.513 *	0.167	0.141	0.108	0.041	0.021	0.009
	38B	0.774	0.438 *	0.149	0.149	0.143	0.108	0.013	0.000
	8R	0.759	0.479 *	0.151	0.139	0.105	0.104	0.018	0.004
	71R	0.783	0.322 *	0.267	0.182	0.143	0.085	0.001	0.000
	33W	0.822	0.235	0.225	0.205 *	0.169	0.165	0.000	0.000
	43R	0.890	0.285	0.228	0.167	0.151 *	0.089	0.067	0.013

Note: Attentional weights for each of the features in the category exemplars for the 5 human participants who did not show maximal selectivity (that is, w = 1 for the deterministic feature) and all 16 pigeons. The normalized entropy of their attentional weights appears in bold. The attentional weights are rank ordered, so that the first feature is always the one with the largest attentional weight. The asterisk (and red color) indicates the attentional weight for the deterministic feature. Note that, the lower the entropy score, the higher the attentional weight to a single feature; conversely, the higher the entropy score, the more distributed the attentional weights are among a greater number of features.