Table 3.
Alpha absolute power in frontal scalp regions and frontal EEG asymmetry in children exposed to institutionalization and children raised in the community across development.
| Baseline1 | 30 months | 42 months | 96 months | |||||
|---|---|---|---|---|---|---|---|---|
| Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | |
| Absolute Alpha Power in Right Frontal Scalp Region (F4) | ||||||||
| Institutionalized | 3.64 | (.57) | 3.82 | (.41) | 3.78 | (.39) | 56.96 | (32.4) |
| Foster Care Group | 3.73 | (.50) | 3.88 | (.39) | 3.84 | (.38) | 60.48 | (37.19) |
| Institutional Care Group | 3.61 | (.59) | 3.81 | (.40) | 3.76 | (.42) | 53.38 | (26.62) |
| Community Controls | 3.82 | (.45) | 3.94 | (.41) | 3.83 | (.47) | 66.55 | (28.48) |
|
| ||||||||
| Absolute Alpha Power in Left Frontal Scalp Region (F3) | ||||||||
| Institutionalized | 3.60 | (.61) | 3.82 | (.40) | 3.85 | (.41) | 56.95 | (31.07) |
| Foster Care Group | 3.69 | (.48) | 3.88 | (.37) | 3.89 | (.41) | 60.00 | (33.55) |
| Institutional Care Group | 3.58 | (.65) | 3.79 | (.35) | 3.81 | (.45) | 53.83 | (28.32) |
| Community Controls | 3.80 | (.47) | 4.00 | (.42) | 3.83 | (.41) | 65.77 | (29.37) |
|
| ||||||||
| EEG Frontal Asymmetry | ||||||||
| Institutionalized | .010 | (.08) | −.000 | (.05) | −.016 | (.07) | −.002 | (.09) |
| Foster Care Group | .005 | (.05) | −.000 | (.04) | −.018 | (.07) | .002 | (.08) |
| Institutional Care Group | .016 | (.05) | −.000 | (.04) | −.014 | (.07) | −.006 | (.09) |
| Community Controls | .004 | (.04) | −.015 | (.03) | .000 | (.05) | .028 | (.09) |
|
| ||||||||
| Proportion of Children with Right Greater than Left Frontal Activation | ||||||||
| N | %2 | N | %2 | N | %2 | N | %2 | |
| Institutionalized | 54 | 41.5 | 57 | 50.0 | 61 | 62.2 | 51 | 50.5 |
| Foster Care Group | 28 | 44.4 | 28 | 47.5 | 31 | 59.6 | 26 | 49.1 |
| Institutional Care Group | 26 | 38.8 | 29 | 52.7 | 30 | 65.2 | 25 | 52.1 |
| Community Controls | 20 | 37.7 | 25 | 65.8 | 15 | 51.7 | 10 | 38.5 |
1
The mean age of participants at baseline was 22.97 months.
2
Proportion represents the number of children with right greater than left frontal activation divided by the total number of children with valid EEG data at that time point.