The Green et al. Paranoid Thought Scales (GPTS) was developed to fulfill a need for a tool that was adapted to the current dimensional definition of paranoia, capable to assess dimensions of preoccupation, conviction, and distress, valid and reliable for the assessment of both clinical and healthy populations, and precise enough to detect subtle clinical change. It has recently been validated for the Spanish population (S-GPTS) with very good psychometric properties. Numerous studies suggest that patients with severe psychiatric disorders have impaired sustained attention and memory. A wide spectrum of executive deficits have also been described (goal-oriented tasks, recognizing priority patterns, planning, etc.) Very few studies have attempted to identify whether these same relationships between neuropsychological deficits and psychotic symptoms also occur in general population.

This is a cross-sectional study. We undertook a multistage sampling using different standard stratification levels and out of the 5496 eligible participants finally approached, 4507 (83.7%) agreed to take part in the study, completed the interview and were finally included in the study (n = 4507).

Individuals with high cut off S-GPTS scores showed lower scores in working memory subtest verbal statistically significant(P > .05). While no significant difference was found among for immediate verbal learning subtest and high S-GPTS scores (P > .05654).

This information can improve the clinician's understanding of patient's cognitive strength and weaknesses, put patients’ cognitive abilities into perspective for their diagnosis, and facilitate multidisciplinary treatment decisions as we improve our ability to distinguish clinical cases from non-clinical population.

The authors have not supplied their declaration of competing interest.