Table 2.
Mean proportion AB (dimensional identity) and BC (overall similarity) classifications
Reference | Description | Age | BC | AB |
---|---|---|---|---|
Smith & Kemler, 1977, exp 1 | Triad; size-shade | |||
5–6 yrs | 0.56 | 0.34 | ||
7–8 yrs | 0.40 | 0.50 | ||
10–11 yrs | 0.22 | 0.68 | ||
Smith & Kemler, 1977, exp 2 | Tetrad: Size-shade | |||
5–6 yrs | .58 | .34 | ||
10–11 yrs | .18 | .80 | ||
Ward, 1980, exp 1 | Triad: length-density | |||
(columnar condition) | 4–6 yrs | .56 | .28 | |
Adults | .34 | .61 | ||
Shepp, Burns & McDonough, 1980, exp 1 |
Triad: size-shade | |||
4 yrs | 0.80 | .13 | ||
6–7 yrs | 0.45 | .48 | ||
11–12 yrs | 0.21 | .79 | ||
Shepp et al., 1980, exp 1 | Triad: size-angle | |||
4 yrs | 0.78 | .15 | ||
6–7 yrs | 0.43 | .50 | ||
11–12 yrs | 0.26 | .67 | ||
Kemler, 1982, exp 1 | Triad: size-shade | |||
4–5 yrs | .70 | .20 | ||
Smith, 1983, exp 1 | Tetrad: size-shade | |||
4–5 yrs | .66 | .29 | ||
5–6 yrs | .66 | .30 | ||
Smith, 1989, exp 1a | Triad: size-shade | |||
2 yrs | .48 | .20 | ||
3 yrs | .55 | .24 | ||
4 yrs | .52 | .28 | ||
5 yrs | .62 | .28 | ||
8yrs | .30 | .70 | ||
Adult | .03 | .97 | ||
Ruskin & Kaye, 1990 | Triad: size-shade | |||
5–6 yrs | .33 | .60 | ||
11–12 yrs | .16 | .82 |
Note. Overall similarity proportions for some experiments are calculated from dimensional identity and haphazard grouping.
In Smith’s (1989) experiment, items could be grouped freely, so there were more than 2 possibilities. (Numbers were estimated from Smith, 1989, Figure 11).