Tr. Kwapil et al., MAGICAL IDEATION AND SOCIAL ANHEDONIA AS PREDICTORS OF PSYCHOSIS PRONENESS - A PARTIAL REPLICATION, Journal of abnormal psychology, 106(3), 1997, pp. 491-495
The authors compared college students identified by high scores on the
Magical Ideation Scale (M. Eckblad & L. J. Chapman, 1983) and the Rev
ised Social Anhedonia Scale (MagSoc; n = 28; M. Eckblad, L. J. Chapman
, J. P. Chapman, & M. Mishlove, 1982) with control participants (n = 2
0) at a 10-year follow-up assessment in an attempt to replicate L. J.
Chapman, J. P. Chapman, T.R. Kwapil, M. Eckblad, and M. C. Zinser's (1
994) report of heightened psychosis proneness in MagSoc individuals. T
he MagSoc group exceeded the control group on severity of psychotic-li
ke experiences; ratings of schizotypal, paranoid, and borderline perso
nality disorder symptoms; and rates of mood and substance use disorder
s. Two of the MagSoc participants but none of the control participants
developed psychosis during the follow-up period (a nonsignificant dif
ference). Consistent with L. J. Chapman et al.'s findings, the groups
did not differ on rates of personality disorders or relatives with psy
chosis.