“…The factor composition is as follows: excitement (items: excessive activity, reduced need for sleep, pressured speech, elevated mood, thoughts racing, increased sociability, increased self‐esteem, irritable mood, distractibility, agitated activity, dysphoria, grandiose delusions, reckless activity), depression (items: loss of pleasure, loss of energy/tiredness, diminished libido, excessive self‐reproach, slowed activity, poor appetite, poor concentration, suicidal ideation, weight loss, diurnal variation, early morning waking, delusions of guilt), delusion (items: persecutory delusions, well‐organized delusions, delusions of influence, widespread delusions, primary delusional perception, delusions and hallucinations lasting for 1 week, persecutory/jealous delusions and hallucinations, thought insertion, thought withdrawal, thought broadcast, third‐person auditory hallucinations), disorganization (items: speech difficult to understand, incoherent, positive formal thought disorder, inappropriate affect, bizarre behavior, bizarre delusions), and negative (items: blunted affect, negative formal thought disorder, restricted affect, catatonia). The factors resulted stable after enlargement of the sample including the present one (data not shown) and are coherent with previous analyses [Liddle, 1987; Peralta et al, 1992; Andreasen et al, 1995; Cuesta and Peralta, 1995; Maziade et al, 1995; Schroder et al, 1995]. The fifth factor was included in order to allow comparisons with previous findings [Cardno et al, 1996].…”