Data Analysis
SPQ-BR total scores were calculated by summing across all 32-items (see Figure 2a), following standard instructions. The interpersonal, cognitive-perceptual, and disorganized factors were calculated following convention from various subfactors (Cohen et al., 2010; see Figure 2c). The interpersonal factor (range 0-40) was the sum of no close friends (CF), constricted affect (CA), and social anxiety (SA) subfactor items (CF1, CF2, CF3, CA4, CA5, CA6, SA1, SA2, SA3, SA4). The cognitive-perceptual factor (range 0-56) was the sum of the ideas of reference (IR), suspiciousness (S), magical thinking (MT), and unusual perceptions (UP) subfactor items (S1, S2, S3, IR4, IR5, IR6, MT1, MT2, MT3, MT4, UP1, UP2, UP3, UP4). Lastly, the disorganized factor (range 0-32) was the sum of the eccentric behavior (EB) and odd speech (OS) subfactor items (EB1, EB2, EB3, EB4, OS1, OS2, OS3, OS4). We also assessed the relationship between number of illusions seen in the Pattern Glare Test and the seven subfactors of schizotypy: no close friends/constricted affect, social anxiety, ideas of reference/suspiciousness, magical thinking, unusual perceptions, eccentric behavior, and odd speech (Cohen et al., 2010). See the supplementary materials for the results of this analysis.
Pattern Glare score was the total number of illusory responses reported by the participant (see Figure 2b). The “other” response option counted as 1 illusion. The “none of the following” response option counted as 0 illusions.