[Prefrontal Symptoms Inventory (PSI): ecological validity and convergence with neuropsychological measures].
BACKGROUND
The Prefrontal Symptoms Inventory (PSI) is a self-reported questionnaire, created in Spain, which asks about cognitive, emotional and behavioural alterations in activities of daily living and which can be applied in both the general population and in multiple clinical populations. There is a shorter 20-item version (PSI-20) with excellent psychomotor properties for screening.


OBJECTIVE
To study the convergent and divergent validity of the PSI and PSI-20, by analysing how their scales reflect the day-to-day consequences of real deficits found in neurological assessment performed by means of performance tests.


METHODS
A sample of 52 persons undergoing treatment for substance addiction (31 males and 21 females) were administered the PSI together with an abbreviated neuropsychological examination battery focused on describing attentional, mnemonic and executive processes.


RESULTS
Both versions of the PSI present optimal psychometric properties (0.78 > alpha > 0.94 for the complete 46-item version and 0.7 > alpha > 0.89 for the abbreviated 20-item version). The results confirm the hypotheses regarding their validity: the performance problems scale is related with the capacity to resolve tests that supposedly rate the executive functions of a prefrontal origin (convergent validity), whereas the scales of problems in emotional control and problems with social behaviour are not related with those cognitive capabilities (discriminant validity).


CONCLUSIONS
The PSI is a test that is clinically useful, psychometrically valid and applicable in multiple clinical populations.
Madrid Salud. Ayuntamiento de Madrid. Centro de Atencion a Drogodependientes (CAD 4-San Blas), Madrid, Espana.
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EJ
Pedrero-Perez
Madrid Salud. Ayuntamiento de Madrid. Centro de Prevencion del Deterioro Cognitivo, Madrid, Espana.|Universidad Complutense de Madrid, Pozuelo de Alarcon, Espana.
J M
JM
Ruiz-Sanchez de Leon
Universidad Rey Juan Carlos, 28922 Madrid, Espana.|Madrid Salud. Ayuntamiento de Madrid. Centro de Atencion a Drogodependientes (CAD 4-San Blas), Madrid, Espana.
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G
Rojo-Mota
Madrid Salud. Ayuntamiento de Madrid. Centro de Atencion a Drogodependientes (CAD 4-San Blas), Madrid, Espana.
S
S
Morales-Alonso
Madrid Salud. Ayuntamiento de Madrid. Centro de Atencion a Drogodependientes (CAD 4-San Blas), Madrid, Espana.
J
J
Pedrero-Aguilar
Madrid Salud. Ayuntamiento de Madrid. Centro de Atencion a Drogodependientes (CAD 4-San Blas), Madrid, Espana.
I
I
Lorenzo
Madrid Salud. Ayuntamiento de Madrid. Centro de Atencion a Drogodependientes (CAD 4-San Blas), Madrid, Espana.
A
A
Gonzalez
D000203:Activities of Daily Living; D056344:Executive Function; D005260:Female; D006801:Humans; D008297:Male; D011594:Psychometrics; D015203:Reproducibility of Results; D013030:Spain; D011795:Surveys and Questionnaires