Table 1.
Intra-individual variability (IIV) for impulsiveness and inattention, measured as phenotypic dispersion (PDi) averaged over experimental session repeated by six-minute experimental segment in 16 Spontaneously Hypertensive Rats (SHR) and 15 Wistar-Kyoto (WKY) rats [27].
| Trait | χ2 | P | F | P | μSHR ± 95%CI | μWKY ± 95%CI |
|---|---|---|---|---|---|---|
| Impulsiveness |
15.3 |
< 0.0001 |
15.8 |
0.0001 |
1.26 ± 0.201 |
0.680 ± 0.212 |
| Hyperactivity |
52.8 |
< 0.0001 |
77.6 |
< 0.0001 |
3.65 ± 0.134 |
2.80 ± 0.136 |
| Inattention | 111.5 | < 0.0001 | 452.4 | < 0.0001 | 4.77 ± 0.138 | 2.62 ± 0.142 |
Differences in dispersion were estimated using Kruskal-Wallis nonparametric ranking (χ2) and log-transformed PDi (F); differences in means for dispersion were estimated from log-transformed PDi. Variance was estimated from behavioral averages for individuals across all sessions and experimental segments [27].