TABLE 2D.
Post-hoc t-test results for rough-and-tumble play behavior in pairs of juvenile female HET and WT rats.
| Component | Pair | First play partner | Mean + SEM | t-test | Percent of Total Time Spent Playinga |
| Pinning | WT-WT | WT | 7.5 + 1.5 | t18 = 0.345, p = 0.734 | 28.3% |
| HET | 6.7 + 1.6 | 31.2% | |||
| HET-HET | WT | 7.2 + 1.1 | t18 = 3.43, p = 0.003* | 30.0% | |
| HET | 2.8 + 0.7 | 22.7% | |||
| HET-WT | WT | 5.7 + 0.7 | t18 = 1.189, p = 0.250 | 25.1% | |
| HET | 8.1 + 1.5 | 36.9% | |||
| WT-HET | WT | 7.4 + 1.3 | t18 = 1.036, p = 0.314 | 31.1% | |
| HET | 5.7 + 0.9 | 29.8% | |||
| Wrestling | WT-WT | WT | 5.9 + 0.5 | t18 = 0.975, p = 0.343 | 25.6% |
| HET | 6.8 + 0.8 | 35.2% | |||
| HET-HET | WT | 6.2 + 0.6 | t18 = 2.402, p = 0.027* | 26.8% | |
| HET | 4.0 + 0.7 | 32.4% | |||
| HET-WT | WT | 4.6 + 0.7 | t18 = 3.194, p = 0.005* | 20.9% | |
| HET | 7.8 + 0.7 | 38.7% | |||
| WT-HET | WT | 6.5 + 0.8 | t18 = 1.096, p = 0.288 | 28.7% | |
| HET | 7.5 + 0.4 | 43.1% | |||
| Chasing | WT-WT | WT | 1.2 + 0.2 | t18 = 3.420, p = 0.003* | 4.8% |
| HET | 0.5 + 0.1 | 2.2% | |||
| HET-HET | WT | 1.5 + 0.3 | t18 = 2.628, p = 0.017* | 6.2% | |
| HET | 0.6 + 0.2 | 4.2% | |||
| HET-WT | WT | 1.1 + 0.3 | t18 = 1.320, p = 0.203 | 4.7% | |
| HET | 0.6 + 0.1 | 3.1% | |||
| WT-HET | WT | 8.1 + 0.3 | t18 = 0.806, p = 0.431 | 3.2% | |
| HET | 1.1 + 0.3 | 5.6% | |||
| Nape attacks | WT-WT | WT | 5.5 + 0.6 | t18 0.649, p = 0.524 | 22.5% |
| HET | 4.8 + 0.4 | 26.0% | |||
| HET-HET | WT | 7.3 + 0.7 | t18 = 2.699, p = 0.015* | 32.2% | |
| HET | 3.6 + 1.1 | 30.1% | |||
| HET-WT | WT | 6.9 + 0.6 | t18 = 4.168, p < 0.001* | 34.9% | |
| HET | 3.5 + 0.6 | 17.5% | |||
| WT-HET | WT | 7.6 + 1.0 | t18 = 4.320, p = 0.001* | 34.2% | |
| HET | 2.6 + 0.5 | 12.7% | |||
|
Pair
First play partner |
WT-WT | HET-HET | HET-WT | WT-HET | |
| Total time spent playing across all play sessions (seconds/min) | WT | 25.1 + 3.1 | 23.3 + 1.3 | 21.4 + 1.9 | 22.9 + 1.2 |
| HET | 19.7 + 1.5 | 12.4 + 2.1 | 20.7 + 1.3 | 19.0 + 2.1 |
Data are pooled for genotype of the cage mate and are shown as the mean seconds spent playing per minute + SEM. *Indicates a significant difference of p < 0.050. Section “3.1.3.1. Effects of the First Play Partner on Rough-and-Tumble Play Components.”
aProportion of the total time spent playing (across 5 min). The total time spent playing includes all play components listed in Table 1. Of note, the proportion of pinning, wrestling, chasing and nape attacks do not add up to 100% of total time spent playing. The remaining components listed in Table 1 account for this difference.