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Table 1 Intra-individual variability (IIV) for impulsiveness and inattention, measured as phenotypic dispersion (PD i ) averaged over experimental session repeated by six-minute experimental segment in 16 Spontaneously Hypertensive Rats (SHR) and 15 Wistar-Kyoto (WKY) rats [27].

From: Intraindividual variability (IIV) in an animal model of ADHD - the Spontaneously Hypertensive Rat

Trait χ 2 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
  1. Differences in dispersion were estimated using Kruskal-Wallis nonparametric ranking (χ2) and log-transformed PD i (F); differences in means for dispersion were estimated from log-transformed PD i . Variance was estimated from behavioral averages for individuals across all sessions and experimental segments [27].