highly significantp < 0.001
Even though these values indicated a modest amount of agreement between the initial perceptual classification and the HCA classification, all were highly significant, suggesting that the observed levels of agreement were not accidental (2 clusters: z (κ/σ = 128.74, p < 0.001; 3 clusters: z (κ/σ) = 105.51, p < 0.001; 4 clusters: z (κ/σ) = 100.84, p < 0.001).