Extended Data Table 2. Concordance in social visual engagement at 21 months, at 36 months, and from 21 until 36 months.
a | |||||
---|---|---|---|---|---|
| |||||
Eyes | Mouth | Body | Object | Time Spent Attending to Task |
|
MZ Twins | 0.91 (0.85 – 0.95)** | 0.86 (0.76 – 0.92)** | 0.71 (0.52 – 0.83)** | 0.66 (0.46 – 0.80)** | 0.46 (0.19 – 0.67)* |
(N = 41 pairs) | |||||
DZ Twins | 0.35 (0.07 – 0.59)* | 0.44 (0.16 – 0.65)* | 0.33 (0.04 – 0.57)* | 0.09 (0.00 – 0.38) | 0.34 (0.05 – 0.58)* |
(N = 42 pairs) | |||||
Age-, Sex-Matched Non-Siblings | 0.16 (0.00 – 0.44) | 0.13 (0.00 – 0.42) | 0.29 (0.00 – 0.55) | 0.14 (0.00 – 0.42) | 0.14 (0.00 – 0.43) |
(N = 42 pairs) | |||||
Randomly-Matched Non-Siblings | 0.00 (0.00 – 0.29) | 0.00 (0.00 – 0.29) | 0.00 (0.00 – 0.29) | 0.00 (0.00 – 0.30) | 0.00 (0.00 – 0.30) |
(N = 42 pairs; 10,000 resamplings) |
b | |||||
---|---|---|---|---|---|
| |||||
Eyes | Mouth | Body | Object | Time Spent Attending to Task |
|
MZ Twins | 0.93 (0.75 – 0.98)** | 0.93 (0.77 – 0.98)** | 0.63 (0.08 – 0.88)* | 0.95 (0.81 – 0.99)** | 0.80 (0.19 – 0.94)** |
(N = 11 pairs) | |||||
DZ Twins | 0.25 (0.00 – 0.60) | 0.14 (0.00 – 0.52) | 0.21 (0.00 – 0.58) | 0.00 (0.00 – 0.41) | 0.23 (0.00 – 0.59) |
(N = 22 pairs) | |||||
Randomly-Matched Pairs | 0.00 (0.00 – 0.33) | 0.00 (0.00 – 0.33) | 0.00 (0.00 – 0.33) | 0.00 (0.00 – 0.33) | 0.00 (0.00 – 0.33) |
(N = 33 pairs) |
c | |||||
---|---|---|---|---|---|
| |||||
Eyes | Mouth | Body | Object | Time Spent Attending to Task |
|
MZ Twins | 0.70 (0.40 – 0.86)** | 0.73 (0.45 – 0.88)** | 0.21 (0.00 – 0.58) | 0.74 (0.47 – 0.88)** | 0.09 (0.00 – 0.49) |
(N = 11 pairs) | |||||
DZ Twins | 0.22 (0.00 – 0.49) | 0.07 (0.00 – 0.36) | 0.02 (0.00 – 0.31) | 0.07 (0.00 – 0.35) | 0.00 (0.00 – 0.30) |
(N = 22 pairs) |
Single asterisk (*) signifies P < 0.05 significance value, one-sided comparison relative to 0.
Double asterisk (**) signifies P < 0.01 significance value, one-sided comparison relative to 0.