Table 1.

Category structure used in Experiments 1 and 2.

	Category A							Category B
	Features							Features
	P1	P2	P3	P4	P5	P6	D	P1	P2	P3	P4	P5	P6	D
Training items
	1	1	0	0	0	0	0	0	0	1	1	1	1	1
	0	1	1	0	0	0	0	1	0	0	1	1	1	1
	0	0	1	1	0	0	0	1	1	0	0	1	1	1
	0	0	0	1	1	0	0	1	1	1	0	0	1	1
	0	0	0	0	1	1	0	1	1	1	1	0	0	1
Testing items
Prototype	0	0	0	0	0	0	0	1	1	1	1	1	1	1
Incongruent	1	1	1	1	0	0	0	0	0	0	0	1	1	1
Only-P	0	0	1	1	0	0	N	1	1	0	0	1	1	N
Only-D	N	N	N	N	N	N	0	N	N	N	N	N	N	1
One-New-P	N	0	0	0	1	1	0	N	1	1	1	0	0	1

Note. The value 0 = any of seven features identical to the prototype of the category A. The value 1 = any of seven features identical to the prototype of the category B. The value N = new feature; it was always a white circle. P = probabilistic feature; D = deterministic feature.