Wallpaper illusion: cause of disorientation and falls on escalators

The wallpaper illusion, first described over a century ago, can occur when a person with normal binocular vision views a pattern that is periodic in the horizontal meridian of the visual field. Escalator trends present such a pattern. Evidence is presented favoring the view that disorientation experienced by escalator riders is caused by this illusion. Possibly some of the estimated 60,000 escalator falls occurring in the United States each year are linked to it.     

The eyes have it: making positive expressions more positive and negative expressions more negative

Facial expressions frequently involve multiple individual facial actions. How do facial actions combine to create emotionally meaningful expressions? Infants produce positive and negative facial expressions at a range of intensities. It may be that a given facial action can index the intensity of both positive (smiles) and negative (cry-face) expressions. Objective, automated measurements of facial action intensity were paired with continuous ratings of emotional valence to investigate this possibility. Degree of eye constriction (the Duchenne marker) and mouth opening were each uniquely associated with smile intensity and, independently, with cry-face intensity. In addition, degree of eye constriction and mouth opening were each unique predictors of emotion valence ratings. Eye constriction and mouth opening index the intensity of both positive and negative infant facial expressions, suggesting parsimony in the early communication of emotion.     

Spontaneous facial expression in a small group can be automatically measured: An initial demonstration

Manual measurement of facial expression is labor intensive and difficult to standardize. Automated measurement seeks to address the need for valid, efficient, and reproducible measurement. Recent systems have shown promise in posed behavior and in structured contexts. Can automated measurement perform in more natural, less constrained settings? In the present study, previously unacquainted young adults sat around a circular table for 30 min of conversation. Video was selected for manual and automatic coding of Facial Action Coding System action units (AUs), examining, in particular, AU 6 (cheek raise) and AU 12 (lip corner pull), which together signal enjoyment. Moderate out-of-plane head motion and occlusion, which are challenging for automatic processing, were both common, as participants turned toward and away from each other or consumed drinks. Concurrent validity for both AUs was high. This is the first study to find that automated measurement of facial action in relatively unconstrained contexts can achieve results comparable with those of manual coding. Video demos of our software may be downloaded from http://brm.psychonomic-journals.org/content/supplemental.     

Book reviews

New Religious Movements in the United States and Canada. A Critical Assessment and Annotated Bibliography Compiled by Diane Choquette Greenwood Press, London, 1985 £39.95 pp.235

Knowledge, Belief and Witchcraft: Analytic Experiments in African Philosophy. B. Hallen and J.O. Spdipo. Ethnographica, London, 1986. Pp 1–38

Sectes Nouvelles. Un regard neuf.. Jean‐Francois Mayer. Paris: Les Editions du Cerf, 1985. ISBN 2–204–02458–9. 130 pp.

Restoring die Kingdom: The Radical Christianity of the House Church Movement. Andrew Walker Hodder and Stoughton, London, Sydney, Aukland, Toronto, 1985 298 pages (P/B) £5.95

Bhagwan: The God that failed . Hugh Milne. London: Caliban Books. ISBN 1 85066 0069. £12, 316pp.

Is There a New Imbalance in the Jewish‐Christian Relation?. Antonio Barboso da Silva Uppsala University, Uppsala 1985. 220 pages

Sociological Theory, Religion and Collective Action. Roy Wallis and Steve Bruce The Queen's University Press, Belfast, 1986 i‐xi, 395 pp. Hdbk.

The Way of the Heart: The Rajneesh Movement. Judith Thompson & Paul Heelas Aquarian Press, Wellingborough, pp. 142, £5.99     

Toward a hierarchical model of criminal thinking: evidence from item response theory and confirmatory factor analysis

Item response theory (IRT) methods were applied to items from the 80-item Psychological Inventory of Criminal Thinking Styles (PICTS; G. D. Walters, 1995) to determine how well they measure the latent trait of criminal thinking in a group of 2,872 male medium security prison inmates. Preliminary analyses revealed that the 64 PICTS thinking style items, 32 PICTS proactive criminal thinking items, and 24 PICTS reactive criminal thinking items were sufficiently unidimensional to meet the local independence requirements of IRT. The PICTS was fitted to a 2-parameter logistic-graded response IRT model, the results of which showed that the 8 items measuring denial of harm (Sentimentality) displayed weak discrimination (a < 0.5), whereas most of the proactive and reactive items displayed moderate to good discrimination (a > 1.0). Information function analysis revealed that all 3 components of a hierarchical model of criminal thinking--PICTS total scale, PICTS proactive factor, and PICTS reactive factor--displayed greater precision at higher rather than lower levels of the trait dimension. The study findings indicate that items from the PICTS Sentimentality scale do a poor job of measuring general criminal thinking, whereas items from the other 7 PICTS thinking style scales provide their most precise estimates at the upper end of the trait dimension.