The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE): Further description and extended norms Oliver Mason a, * , Gordon Claridge a University College London, United Kingdom Received 6 October 2005; received in revised form 5 December 2005; accepted 6 December 2005 Available online 18 January 2006 Abstract Background: The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE) was introduced in 1995 as a four-scale questionnaire for measuring psychosis-proneness, principally schizotypy. Its items were deliberately chosen to make it suitable for tapping psychotic characteristics in healthy individuals. Since its inception the O-LIFE has been used in a wide variety of experimental and clinical studies, establishing its reliability and validity. Methods: Data was pooled from 1926 participants together with available demographic information from several research institutions. Results: Extensive norms are presented by age and gender. Inter-correlations and regression equations based on age and gender are also presented. Conclusions: The theoretical background and implications of work on using the O-LIFE are briefly discussed. D 2005 Elsevier B.V. All rights reserved. Keywords: Schizotypy; Personality 1. Introduction Over the past several decades many self-report scales have been developed for measuring, in non-clinical individuals, what has variously been termed schizotypy, psychosis-proneness, or psychoticism (for reviews see Chapman et al., 1995; Mason et al., 1997b). 1 Of the three descriptors mentioned the most commonly used has been dschizotypyT , reflecting a major research focus on schizophrenia and the schizophrenia spec- trum. Even so, the scales themselves have differed in coverage and item content. Some, such as Raine’s (1991) Schizotypal Personality Questionnaire, have a broad remit, designed to represent the DSM symp- toms of Schizotypal Personality Disorder; others, like the Perceptual Aberration Scale (Chapman et al., 1978) and the Hallucination Scale of Launay and Slade (1981), have been of more limited scope. In response to the evident heterogeneity of the construct there has been a series of attempts to 0920-9964/$ - see front matter D 2005 Elsevier B.V. All rights reserved. doi:10.1016/j.schres.2005.12.845 * Corresponding author. E-mail address: o.mason@ucl.ac.uk (O. Mason). 1 dPsychoticismT is used here in a generic sense, not to be confused with the meaning associated with the Eysenck P-scale, which most would agree measures antisocial aspects of personality and psychological disorder. Schizophrenia Research 82 (2006) 203– 211 www.elsevier.com/locate/schres