Structural and construct validity assessment of the schizophrenia cognition rating scale (SCoRS) using data from...

Area of Science:

• Psychiatry and Mental Health
• Neuroscience
• Clinical Psychology

Background:

• Cognitive impairment associated with schizophrenia (CIAS) significantly impacts daily functioning and quality of life.
• Current antipsychotic medications offer limited benefits for CIAS, highlighting the need for new treatments.
• Traditional cognitive tests for CIAS have limitations in practical application and interpretation.

Purpose of the Study:

• To assess the structural and known-groups validity of the Schizophrenia Cognition Rating Scale (SCoRS) Interviewer total score.
• To explore the dimensionality of the SCoRS using confirmatory factor analysis (CFA).
• To support the use of SCoRS for measuring CIAS in research and clinical settings.

Main Methods:

• Confirmatory factor analysis (CFA) was used to evaluate the SCoRS structure.
• Various CFA models (single factor, four correlated factor, bifactor) were tested.
• Known-groups validity was assessed using clinician and study partner ratings of disease severity.

Main Results:

• Confirmatory factor analysis supported the essential unidimensionality of the SCoRS.
• Known-groups validity analysis demonstrated that the SCoRS interviewer total score can differentiate between severity groups.
• The findings support the SCoRS as a valid measure for CIAS.

Conclusions:

• The SCoRS Interviewer total score exhibits strong structural and known-groups validity.
• The SCoRS is a reliable tool for measuring cognitive impairment in schizophrenia.
• This scale can aid in assessing treatment efficacy for CIAS in clinical trials and practice.