Table 4.
Descriptive statistics, bivariate correlations (Pearson’s r), and intraclass correlations (ICC) of the mean activity measures of early and late LPP
| T1 M (SD) | T2 M (SD) | T3 M (SD) | T1 to T2 r | T2 to T3 r | T1 to T3 r | T1 to T2 ICC | T2 to T3 ICC | T1 to T3 ICC | T1, T2, and T3 ICC | |
|---|---|---|---|---|---|---|---|---|---|---|
| Early LPP | ||||||||||
| Unpleasant centroparietal | −21.00 (10.21) | −14.88 (8.34) | −11.66 (6.43) | .47** | .65** | .62** | .38*** | .58*** | .35*** | .41*** |
| Pleasant centroparietal | −24.88 (11.63) | −17.72 (8.73) | −14.70 (6.39) | .58** | .70** | .59** | .45*** | .62*** | .31*** | .43*** |
| Neutral centroparietal | −24.32 (9.37) | −17.63 (7.09) | −13.83 (5.84) | .65** | .74** | .48** | .48*** | .62*** | .23*** | .39*** |
| Unpleasant centroparietal residual | 0.00 (6.43) | 0.00 (5.98) | 0.00 (3.86) | .11 | .34** | .39** | .11 | .32** | .35** | .24*** |
| Pleasant centroparietal residual | 0.00 (6.81) | 0.00 (5.85) | 0.00 (3.63) | −.08 | .28* | .005 | −.08 | .25* | .01 | .03 |
| Unpleasant occipital | 27.73 (14.36) | 18.75 (9.52) | 14.23 (7.19) | .71** | .75** | .66** | .51*** | .64*** | .31*** | .44*** |
| Pleasant occipital | 27.64 (14.24) | 17.77 (10.15) | 13.18 (7.27) | .68** | .80** | .56** | .49*** | .67*** | .25*** | .41*** |
| Neutral occipital | 24.93 (14.91) | 16.72 (9.37) | 13.54 (7.03) | .72** | .80** | .72** | .54*** | .72*** | .38*** | .50*** |
| Unpleasant occipital residual | 0.00 (6.56) | 0.00 (5.61) | 0.00 (3.47) | .37** | .33** | .21 | .37** | .30** | .18 | .29*** |
| Pleasant occipital residual | 0.00 (7.72) | 0.00 (5.19) | 0.00 (3.59) | .17 | .17 | .09 | .16 | .16 | .07 | .13* |
| Late LPP | ||||||||||
| Unpleasant centroparietal | −3.12 (7.51) | −3.23 (6.64) | −4.14 (5.56) | .19 | .26* | .32* | .19 | .26* | .31** | .25*** |
| Pleasant centroparietal | −5.65 (7.25) | −5.15 (7.00) | −7.41 (5.14) | .34** | .31* | .36** | .34** | .28** | .33** | .32*** |
| Neutral centroparietal | −7.37 (8.33) | −6.04 (5.33) | −7.15 (5.08) | .36** | .33** | .18 | .32** | .32** | .16 | .26*** |
| Unpleasant centroparietal residual | 0.00 (6.94) | 0.00 (6.12) | 0.00 (4.82) | .05 | .03 | .24 | .05 | .03 | .23* | .10 |
| Pleasant centroparietal residual | 0.00 (6.90) | 0.00 (5.70) | 0.00 (4.37) | .11 | −.04 | .16 | .11 | −.04 | .15 | .09 |
| Unpleasant occipital | 19.28 (12.63) | 10.94 (7.98) | 8.24 (6.45) | .62** | .70** | .59** | .43*** | .65*** | .30*** | .40*** |
| Pleasant occipital | 16.08 (11.92) | 9.20 (8.11) | 6.75 (5.58) | .57** | .59** | .42** | .43*** | .53*** | .22** | .36*** |
| Neutral occipital | 14.15 (13.85) | 9.31 (6.84) | 6.69 (5.77) | .60** | .60** | .59** | .44*** | .55*** | .34*** | .41*** |
| Unpleasant occipital residual | 0.00 (7.86) | 0.00 (5.32) | 0.00 (4.43) | .23 | .20 | .11 | .22* | .20 | .10 | .17* |
| Pleasant occipital residual | 0.00 (8.13) | 0.00 (5.36) | 0.00 (4.38) | .08 | −.05 | −.007 | .08 | −.05 | −.01 | .02 |
Note: T1 = age 9; T2 = age 12; T3 = age 15;
***
p < .001;
**
p < .01;
*
p < .05;
Early LPP time window: 325–425 ms; Late LPP time window: 900–1000 ms