Rasch's multiplicative poisson model with covariates

As a multivariate model of the number of events, Rasch's multiplicative Poisson model is extended such that the parameters for individuals in the prior gamma distribution have continuous covariates. The parameters for individuals are integrated out and the hyperparameters in the prior distribution are estimated by a numerical method separately from difficulty parameters that are treated as fixed parameters or random variables. In addition, a method is presented for estimating parameters in Rasch's model with missing values. The author is now affiliated with the Otara University of Commerce. The author is grateful to Yoshio Takane, Haruo Yanai, Eiji Muraki, the editor and referees for their careful readings and helpful suggestions on earlier versions of this paper. Part of this work was presented at the third European Congress of Psychology at Tampere, Finland in 1993.     

Effects of single trial of heart-rate biofeedback during ramp bicycling exercise

We examined whether a single trial of heart-rate biofeedback was effective to attenuate heart-rate responses during ramp exercise despite a lack of biofeedback conditioning. 35 healthy women exercised in two trials while they tried to attenuate their heart rate by watching biofeedback signals or they only exercised without biofeedback signals (Control trial). 17 subjects were able to attenuate the heart rate during Biofeedback trial (Can group) whereas the remaining subjects were not (Cannot group). In the Can group, the magnitude of heart-rate attenuation in all exercise time was equivalent to 11+/-3% of the preexercise heart rate. Since the heart-rate reduction was similar to that achieved after the heart-rate biofeedback conditioning in previous studies, it is likely that the single trial of heart-rate biofeedback was effective for almost half the subjects to attenuate the heart-rate responses during ramp exercise.     

Standard errors for procrustes solutions

The asymptotic standard errors for the procrustes solutions are derived for orthogonal rotation, direct oblique rotation and indirect oblique rotation. The standard errors for the first two rotations are obtained using the augmented information matrices. For the indirect oblique solution, the standard errors of rotated parameters are derived from the information matrix of unrotated loadings using the chain rule for information matrices. For all three types of rotation, the standard errors of rotated parameters are presented for unstandardized and standardized manifest variables. Numerical examples show the similarity of theoretical and simulated values.     

Book reviews

Arvind Sharma, The Philosophy of Religion and Advaita Vedānra: A Comparative Study in Religion and Reason. University Park, Pennsylvania, The Pennsylvania State University Press, 1995, viii+232 pp., £29.50, $32.50. ISBN 0 271 01032 0.

Niels C. Nielsen Jr (ed.), Christianity After Communism: Social, Political and Cultural Struggle in Russia. Boulder, Westview Press, 1994, ix+171 pp., £37.00, $49.95. ISBN 0 8133 2365 7.

Mary Pickering, Auguste Comte: An Intellectual Biography, Volume 1, Cambridge, Cambridge University Press, 1993, xi+744 pp., £45.00, $49.95. ISBN 0 521 43405 X.

Christopher Herbert, Culture and Anomie: Ethnographic Imagination in the Nineteenth Century. Chicago, University of Chicago Press, 1991, 312 pp., $48 (hardback) ISBN 0 1226 32738 8, $16.95 (paperback) ISBN 0 226 32738 6.

Clifford Geertz, After the Fact: Two Countries, Four Decades, One Anthropologist. Cambridge, Massachusetts, Harvard University Press, 1995, 198 pp., $27.50. ISBN 0 674 00871 5.

William Hamilton, A Quest for the Post-Historical Jesus. New York, Continuum, 1994, 304 pp., $27.50. ISBN 0 8264 0641 6.

Valerie J. Hoffman, Sufism, Mystics, and Saints in Modern Egypt. University of South Carolina Press, 1995, 377 pp.+ notes and index. ISBN 1 57003 055 3.

Margaret H. Case (ed.), Heinrich Zimmer: Coming Into His Own. Princeton, Princeton University Press, 1994, vi+ 148 pp., $24.95. ISBN 0 691 03337 4.

Tessa J. Bartholomeusz, Women Under the Bō Tree: Buddhist Nuns in Sri Lanka. (Cambridge Studies in Religious Traditions 5.) Cambridge, Cambridge University Press, 1994, xx+284 pp., £37.50, $59.95. ISBN 0 521 46129 4.

Philip C. Almond, Heaven and Hell in Enlightenment England. Cambridge, Cambridge University Press, 1994, xiii+ 218 pp., £35. ISBN 0 521 45371 2.

George W. Stocking, Jr., After Tylor: British Social Anthropology 1888–1951. Madison, University of Wisconsin Press, London, Athlone Press, 1996, xx+441 pp., $40. ISBN 0 485 30072 9.

P. F. Kornicki and I. J. McMullen (eds), Religion in Japan: Arrows to Heaven and Earth. Cambridge, Cambridge University Press, 1996, xxv+315 pp., £40. ISBN 0 521 55028 9.

Michael Angold, Church and Society in Byzantium under the Comneni 1081–1261. 605 pp., $89.95 (cloth). ISBN 0521 26432 4.

David Nirenberg, Communities of Violence: Persecution of Minorities in the Middle Ages. Princeton, Princeton University Press, 1996, ix+301 pp., $29.95, £23.95. ISBN 0 691 03375 7.     

Personality Dysfunction and the Management of Chronic Medical Illness: A Community Health Sample

The purpose of this study was to determine the influence of personality disorders on perceived health status, self-efficacy for management of the chronic illness, and physician perception of patient health. A total of 607 patients with self-identified chronicillness(es) volunteered to participate in the study. Out of this sample, 147 had collaborative physician data indicating a chronic illness. The final sample was 143 due to incomplete data. Results suggested that maladaptive personality characteristics, as measured by the Short-Form of the Coolidge Axis II Inventory (SCATI), were related to a number of important factors that influence self-management of chronic illnesses. When the personality constellations were broken into 3 groups (normal, subclinical, and clinical) significant differences were found on the 3 groups of dependent variables (Subjective Health, Self-Efficacy, Physician Appraisal) for the different personality disorders. These data provide useful information on several factors that influence effective disease management. Clinical implications and directions for future research are provided.     

Personality Disorders in Older Adult Inpatients with Chronic Mental Illness

It has been hypothesized that some types of personality disorders tend to remit with age whereas others may become more prominent. The present study determined the prevalence and nature of 13 personality disorders with a self-report inventory (Coolidge Axis II Inventory) in an older group of chronically mentally ill inpatients (N = 30, mean age = 63 years) and a younger group of similar patients (N = 30, mean age = 39 years). All patients met DSM-IV criteria for either Schizophrenia, Schizoaffective Disorder, Bipolar Disorder, or recurrent severe Major Depression with psychotic features. The prevalence rate of personality disorders was high for both groups: 58% for the older sample and 66% for the younger group. The younger group was more likely to be diagnosed Antisocial, Borderline, Passive-Aggressive, Sadistic, and Schizotypal, but the groups were not different in the rates of Obsessive-Compulsive Disorder. This study supports the hypothesis that some personality disorders remit with age. However, no evidence was found to suggest that other personality disorders become more prominent in older adult psychiatric populations. Suggestions for future research are offered.     

Some relationships between factors and components

The asymptotic correlations between the estimates of factor and component loadings are obtained for the exploratory factor analysis model with the assumption of a multivariate normal distribution for manifest variables. The asymptotic correlations are derived for the cases of unstandardized and standardized manifest variables with orthogonal and oblique rotations. Based on the above results, the asymptotic standard errors for estimated correlations between factors and components are derived. Further, the asymptotic standard error of the mean squared canonical correlation for factors and components, which is an overall index for the closeness of factors and components, is derived. The results of a Monte Carlo simulation are presented to show the usefulness of the asymptotic results in the data with a finite sample size.The author is indebted to anonymous referees for their comments, corrections and suggestions which have led to the improvement of this article.