Table 2.
Across-Age Correlations Between Conflict IC, Delay IC, and Temperament-based IC and Temperament, and Language
| 2 Years | 3 Years | 4 Years | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Temperament | Conflict 2 | Delay 2 | ECBQ IC 2 | Conflict 3 | Delay 3 | CBQ IC 3 | Conflict 4 | Delay 4 | CBQ IC 4 |
| ECBQ IC 2 | −.08(53) | .25*(76) | -- | .21+(62) | .29*(64) | .55**(62) | .08(56) | .02(58) | .42**(62) |
| CBQ IC 3 | −.28*(45) | .30*(63) | .55**(62) | .06(65) | .19(67) | -- | .01(58) | −.01(59) | .45**(61) |
| CBQ IC 4 | .07(43) | .24+(61) | .42**(62) | −.15(61) | .21(62) | .45**(61) | .06(62) | .11(64) | -- |
|
| |||||||||
| Language | Conflict 2 | Delay 2 | ECBQ IC 2 | Conflict 3 | Delay 3 | CBQ IC 3 | Conflict 4 | Delay 4 | CBQ IC 4 |
|
| |||||||||
| MCDI MLU 2 | −.19 (54) | .16(76) | .36**(77) | .39**(62) | .38**(64) | .18(62) | .32*(56) | .11(58) | .00(60) |
| PPVT 3 | −.31*(45) | .06(64) | .27*(63) | .26*(66) | .14(68) | .12(66) | .27*(59) | .11(60) | −.09(61) |
| PPVT 4 | −.28+(39) | .07(57) | .17(56) | .29*(58) | .26*(59) | .29*(58) | .19(60) | .24+(62) | −.03(62) |
Note: Value in parentheses reflects number of subjects included in analysis; ECBQ IC 2 = Early Childhood Behavior Questionnaire Inhibitory Control scale at age 2; CBQ IC = Children’s Behavior Questionnaire Inhibitory Control Scale at ages 3 and 4; MCDI MLU = MacArthur- Bates Communicative Development Inventory Mean Length Utterance measure; PPVT = Peabody Picture Vocabulary Test.
**
p<.01.
*
p<.05.
+
p<.10.