Table 2.

Mean, standard deviation, and range for the characteristics of the 48 stimulus words.

Characteristic	M	SD	Minimum	Maximum
Age of acquisitiona	2.96	.86	1.62	5.31
Familiarityb	6.96	.09	6.67	7.00
Word frequencyc	1.30	.69	0	2.59
Semantic set sized	13.26	4.30	4.00	21.00

^aBased on estimates from 14 adult native speakers of English.

^bBased on a scale from 1 to 7 (Nusbaum et al., 1984).

^cLog frequency value based on Moe et al. (1982).

^dNumber of semantic associations based on Nelson et al. (1998); these values were thus derived from 47 words because the word clap was not in the Nelson et al. norms.