We conducted negative binomial regressions for each sample to
understand which subfactor of the SPQ-BR (interpersonal,
cognitive-perceptual, and disorganized) best predicted the Pattern Glare
score. Negative binomial regressions were used to adjust for
overdispersion in Poisson regressions and to accommodate the skewed
distribution of the outcome variable (number of reported illusions in
the Pattern Glare). All assumptions were met when conducting
regressions. Additionally, there were no influential outliers as
assessed by the Cook’s distance values being less than one (all
Di <.04).
All tests were corrected for multiple comparisons with a
Bonferroni adjusted alpha level of .02. Statistical analyses were
carried out using Statistical Package for the Social Sciences (SPSS
Version 27).