A negative binomial regression tested which of the three SPQ-BR subfactors (interpersonal, cognitive-perceptual, disorganized) best predicted the Pattern Glare score. The overall model was significant, χ2(3) = 33.84, p <.001; see Table 1. The disorganization factor positively predicted the number of illusions reported (b = .03, χ2 = 19.17, p < .001), whereas the interpersonal (p = .20) and cognitive–perceptual (p = .91) factors were not significant contributors; see Figure 4. The incidence rate ratio suggests that for every one unit increase on the disorganized factor, there is a predicted 3.2% increase in Pattern Glare score. In simpler terms, those with higher disorganization factor scores report a greater number of illusions.