Table 1.

Experimental conditions and representative displays. [Reprinted from Eriksen & Eriksen (1974)]

Condition	Example
1 Noise same as target	H	H	H	H	H	H	H
2 Noise response compatible	K	K	K	H	K	K	K
3 Noise response incompatible	S	S	S	H	S	S	S
4 Noise heterogeneous—Similar	N	W	Z	H	N	W	Z
5 Noise heterogeneous—Dissimilar	G	J	Q	H	G	J	Q
6 Target alone				H