Table 1. Descriptive Statistics and t-Test Analyses for 6- and 12-month-old Comparisons.
| Age Tested | ||||||
|---|---|---|---|---|---|---|
|
| ||||||
| 6 months | 12 months | |||||
|
|
|
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| DV | M (SD) | t(28) | p | M (SD) | t(28) | p |
| Latency to look away | ||||||
| Ordinary | 19.88(10.17) | 18.14(6.03) | ||||
| Absurd-neutral | 28.64(11.93) | -3.06 | .005* | 22.74(10.47) | -2.29 | .030 |
| Smiles/Laughs: Frequency | ||||||
| Ordinary | .12(.13) | .07(.11) | ||||
| Absurd-neutral | .15(.17) | -1.20 | .240 | .15(.15) | -3.04 | .005* |
| Smiles/Laughs: Duration | ||||||
| Ordinary | .05(.09) | .03(.04) | ||||
| Absurd-neutral | .14(.20) | -2.81 | .009* | .18(.20) | -4.49 | .001* |
| Smiles/Laughs: Frequency | ||||||
| Absurd-neutral | .15(.17) | .15(.15) | ||||
| Absurd-cued | .09(.10) | 3.18 | .004* | .14(.14) | .35 | .730 |
| Smiles/Laughs: Duration | ||||||
| Absurd-neutral | .14(.20) | .18(.20) | ||||
| Absurd-cued | .08(.13) | 2.63 | .014* | .14(.19) | .97 | .341 |
| Social Looking: Frequency | ||||||
| Ordinary | .11(.13) | .13(.15) | ||||
| Absurd-neutral | .11(.14) | 0.07 | .942 | .15(.13) | -.59 | .560 |
| Social Looking: Frequency | ||||||
| Absurd-neutral | .11(.14) | .15(.13) | ||||
| Absurd-cued | .28(.13) | -5.60 | .001* | .24(.14) | -3.75 | .001* |
| Social Looking: Duration | ||||||
| Absurd-neutral | .04(.06) | .06(.07) | ||||
| Absurd-cued | .21(.17) | -5.71 | .001* | .14(.12) | -4.03 | .001* |
Note. The Holm-Bonferroni (Holm, 1979) method for multiple comparisons was used to maintain the Familywise error rate of .05 within each age group.
Significance values designated with * indicate statistically significant differences based on this procedure.