Observational, short-term prospective, multicenter study to assess psychometric properties of the Spanish version of SWN-K scale in patients with schizophrenia.

Inclusion Criteria:

• Patients with a diagnosis of schizophrenia, schizoaffective disorder, or schizophreniform disorder (DSM-IV TR criteria)
• Stabilized out-patients
• Under treatment with an oral antipsychotic drug

Exclusion Criteria:

• Administration of a depot antipsychotic drug
• Participation in another clinical trial within 4 weeks prior to enrolment into this study

Patient aged 18-year old or older with a diagnosis of schizophrenia, schizoaffective disorder, or shizophreniform disorder