Table 5.
Correlations between measures of lexical-semantic knowledge (PPVT-4) and executive control of memory (CVLT-II, Trial 1) and fluency indices for the students with normal language development.
| Test | PPVT-4 | CVLT-II, Trial 1 | Overall fluency | Cluster size | Embedded cluster ratio | Cluster switch ratio | Slope |
|---|---|---|---|---|---|---|---|
| PPVT-4 | 1.0 | ||||||
| CVLT-II, Trial 1 | −.01 | 1.0 | |||||
| Overall fluency | .18* | .17 | 1.0 | ||||
| Cluster size | .15 | −.05 | .45** | 1.0 | |||
| Embedded cluster ratio | .03 | −.16 | .32** | .47** | 1.0 | ||
| Cluster switch ratio | .03 | .19 | .27** | .13 | −.03 | 1.0 | |
| Slope | −.14 | .14 | .08 | −.08 | −.04 | −.02 | 1.0 |
Note. PPVT-4 = Peabody Picture Vocabulary Test–Fourth Edition, CVLT-II = California Verbal Learning Test–Second Edition. n = 47 for all correlations involving the CVLT, n = 122 for all other correlations.
*
p < .05.
**
p < .01.