H. Gibbons et Th. Rammsayer, Differential effects of personality traits related to the P-ImpUSS dimension on latent inhibition in healthy female subjects, PERS INDIV, 27(6), 1999, pp. 1157-1166
An experiment was performed to investigate the effects of various personali
ty traits (psychoticism, impulsiveness, sensation seeking) with substantial
loadings on the P-ImpUSS dimension on latent inhibition (LI). LI refers to
the finding that performance on a learning task is poorer for a preexposed
irrelevant stimulus than for a novel stimulus. Forty-eight female subjects
were tested by a rule-learning task that has been shown to reliably produc
e differential LI effects in low and high psychosis-prone normals. Results
suggest that, besides psychoticism, the sensation seeking subfactor disinhi
bition is negatively associated with LI. Furthermore, stepwise regression a
nalysis revealed that combining individual psychoticism and disinhibition s
cores results in a significant increase in explained variance of LI. These
findings are discussed in terms of a relationship between distinct P-ImpUSS
-related aspects of personality and LI. (C) 1999 Elsevier Science Ltd. All
rights reserved.