Friedrich 1980.

Study characteristics
Patient sampling	Retropective.
Patient characteristics and setting	N with a clinical diagnosis of psychosis: 28. N screened: 28. Age: Adolescence Gender: Not reported. Ethnicity: Not reported. Comorbid disorders: Not reported. Duration of symptoms: Not reported. Concurrent medications used: Not reported. Inclusion criteria: Not reported. Exclusion criteria: Not reported. Study aim: Diffrential diagnosis of Schneider's first rank symptoms for adolescents. Previous treatment for schizophrenia: Not reported. Clinical setting: Not reported. Country: Not reported.
Index tests	Description of FRS used: Not reported. Professionals performing test: Not reported. Resolution of discrepancies: Not reported. How FRS used in study: Diagnosis.
Target condition and reference standard(s)	Reference standard: E. Blueler's (1975), and P. Berner's (1977) criteria. Target condition(s): Schizophrenia, schizoaffective, affective psychosis, borderline. Professionals performing test: Not reported. Resolution of discrepancies: Not reported.
Flow and timing	Study process: Patients observed and supervised for up to 5 years.  Follow‐up: Not reported.
Comparative	E. Blueler's (1975), K. Schneider's (1976), and P. Berner's (1977) criteria for the diagnosis of psychoses .
Notes	Awaiting translation‐ reported from English abstract.

FRS: first rank symptoms