


That is, delusions are also related to the pathological confidence linked to incorrigibility, and to the collection of less information before making a decision or “jumping to conclusions” ( Garety et al., 1999 Freeman et al., 2002 Moritz and Woodward, 2005). Metacognition should also been taken into account, since delusional thinking is linked to second-order cognition (thoughts about one’s thoughts) ( Moritz et al., 2016). Therefore, in the study of paranoid thoughts, primary cognition must be considered, since irrational beliefs may be the result of a negative evaluation of situations, relationships with others and their interpretations ( Freeman and Garety, 1999 Freeman et al., 2002 Morrison et al., 2015). These delusional thoughts have traditionally been considered as false beliefs that are hard to modify, expressed with absolute conviction and not amenable to reason ( Freeman et al., 2013). It can appear in a wide spectrum of disorders from individuals who do not have pathologies ( Penn et al., 1997), to people with delusional disorder, brief psychotic disorder, schizophreniform disorder, schizophrenia, schizoaffective disorder, psychotic disorder induced by substances or drugs or personality disorders (e.g., paranoid personality disorder), among others ( Garety et al., 1999).

Paranoid delusional thinking is one of the central symptoms of psychosis.
