Table 2.
Measures of Joint Attention Low and High Joint Attention (JA) Dyads
| whole sample | correlation with age | Low JA | High JA | low-high comparison | |
|---|---|---|---|---|---|
|
| |||||
| overall | |||||
| % of time | 39.24 (12.07) | 0.295* | 28.08 (8.06) | 48.41 (4.85) | t(49)=10.61 p<.001, d=3.03 |
| frequency (rate/min) | 9.44 (2.19) | 0.246 | 7.82 (1.55) | 10.76 (1.70) | t(49) =6.45 p < .001, d = 1.84 |
| duration (msec) | 2.38 (0.53) | 0.199 | 2.02 (0.434) | 2.68 (0.44) | t(49) = 5.49 p < .001, d = 1.56 |
|
| |||||
| mutual gaze | |||||
| % of time | 5.74 (4.56) | 0.093 | 4.27 (4.05) | 4.92 (6.62) | t(49) = 0.72, n.s. |
| frequency (rate/min) | 1.78 (1.28) | 0.06 | 1.37 (0.96) | 1.81 (1.43) | t(49)= 0.93, n.s. |
| duration (msec) | 2.44 (0.68) | −0.02 | 1.54 (0.69) | 1.65 (0.73) | t(49) = 0.78, n.s. |
|
| |||||
| JA to object | |||||
| % of time | 34.72 (4.56) | −0.092 | 23.82 (7.68) | 41.76 (6.90) | t(49) = 8.94 p<.001, d=2.55 |
| frequency (rate/min) | 7.66 (1.65) | 0.212 | 6.45 (1.41) | 8.65 (1.07) | t(49) = 5.09 p<.001, d=1.45 |
| duration (msec) | 1.68 (0.71) | 0.42 | 1.99 (0.46) | 2.82 (0.61) | t(49) =5.77 p<.001, d=1.65 |
*
p<0.05