Acceso usuarios
Isabel Argila Plaza, Ana Aquino Servín, María Ángeles García León, Paola Fuentes Claramonte, Núria Ramiro, Pilar Salgado Pineda, Joan Soler Vidal, María Llanos Torres, Amalia Guerrero Pedraza, Manel Sánchez Pérez, Salvador Sarró Maluquer, Raymond Salvador, Peter McKenna, Ana Barajas Vélez, Edith Pomarol Clotet
Abstract Background and objectives Referentiality is a common symptom in psychotic and also some non-psychotic disorders, but there are few existing measures for assessing it. A recently developed detailed measure for this purpose is the Ideas of Reference Interview Scale (IRIS), which however has only been validated in a Chinese population of first episode psychosis patients.
Methods We examined the reliability and validity of a Spanish version of the IRIS (IRIS-S) in 185 patients aged between 18 and 65 with schizophrenia or schizoaffective disorder.
Results The IRIS-S showed internal consistency, with this being good or acceptable for the presence scale and its three subsidiary measures. Inter-rater reliability was good and test-retest reliability was also good, except for one subsidiary measure. Convergent reliability was demonstrated but was lower than expected.
Conclusion The IRIS-S has acceptable psychometric properties when employed in patients with schizophrenia/schizoaffective disorder. Caution is necessary for its use outside psychotic disorders as it has not been examined in such populations.
