Areas of Interest as a Signal Detection Problem in Behavioral Eye‐Tracking Research

Decision researchers frequently analyze attention to individual objects to test hypotheses about underlying cognitive processes. Generally, fixations are assigned to objects using a method known as area of interest (AOI). Ideally, an AOI includes all fixations belonging to an object while fixations to other objects are excluded. Unfortunately, due to measurement inaccuracy and insufficient distance between objects, the distributions of fixations to objects may overlap, resulting in a signal detection problem. If the AOI is to include all fixations to an object, it will also likely include fixations belonging to other objects (false positives). In a survey, we find that many researchers report testing multiple AOI sizes when performing analyses, presumably trying to balance the proportion of true and false positive fixations. To test whether AOI size influences the measurement of object attention and conclusions drawn about cognitive processes, we reanalyze four published studies and conduct a fifth tailored to our purpose. We find that in studies in which we expected overlapping fixation distributions, analyses benefited from smaller AOI sizes (0° visual angle margin). In studies where we expected no overlap, analyses benefited from larger AOI sizes (>.5° visual angle margins). We conclude with a guideline for the use of AOIs in behavioral eye‐tracking research. Copyright © 2015 John Wiley & Sons, Ltd.     

Religion in the UK: An Overview of Equality Statistics and Evidence Gaps

Social survey data is essential to measuring equality, for the assessment of change over time, and to the evaluation of the impact of new policies. In this article we have identified and evaluated the statistical data and evidence on religion in the UK in relation to key policy areas, such as employment, housing, health, education, and criminal justice. For each data source, we consider definitions, data collection, coverage of issues, sample size, and data access. We examine the multi-faceted nature of religion and consider the links between religious and ethnic identities. We also outline models that can link religious identity to equality outcomes (and hence potentially allow the measurement of discrimination) and identify the evidence gaps. The UK has one of the most religiously diverse populations in the European Union, both in terms of diversity within Christianity and between different world religions. However, while religion is increasingly recognised, in both legal and policy terms, as an important equality issue, the data on the dynamics of religion in the UK are limited. The inclusion of a new question on religion in the 2001 Census in England, Scotland, and Wales is a major new source of data, but data are limited regarding the role and significance of religion in people's everyday lives, particularly among ethnic minority populations. It is clear that there is a need for a far more comprehensive and rounded approach to data on religion in the UK, which takes account of its multi-dimensional nature.     

Book reviews

Klein,S. B., & Mowrer, R. R. (Eds.). (1989). Contemporary learining theories: Pavlovian conditioning and the status of traditional learning theory. Hillsdale, N.J.: Lawrence Erlbaum Associates, Inc. Pp. xiv +332. ISBN 0-89859-915-6. £44.95.

Klein, S. B. & Mowrer, R. R. (Eds.). (1989). Contemporary learning theories : Instrumental conditioning theory and the impact of biological constraints on learining. Hillsdale, NJ: Lawrence Erlbaum Associates. Pp. xiii + 293. ISBN 0-8085-0318-1. £38.

Plotkin, H. C. (Ed.). (1988). The role of behavior in evolution. cambridge, Ma : Bradford Books, MIT Press. Pp. viii + 198. ISBN 0-2692-16107-9. £16.95.

Green, L. & Kage, J. H. (Eds.). (1987). Advances in behavioral economics, Volume 1. Norwood, NJ: Ablex Publishing Corporation. Pp. 307. ISBN 0-471-91199-2. £40.95 (hardback).     

The Depth of Resolution Proofs

This paper investigates the depth of resolution proofs, that is to say, the length of the longest path in the proof from an input clause to the conclusion. An abstract characterization of the measure is given, as well as a discussion of its relation to other measures of space complexity for resolution proofs     

Children's Depression Inventory: invariance across children and adolescents with and without depressive disorders

In the study, the authors examined the measurement (configural, factor loadings, thresholds, and error variances) and structural (factor variances, covariances, and mean scores) invariance of the Children's Depression Inventory (CDI; Kovacs, 1992) across ratings provided by clinic-referred children and adolescents with (N = 383) and without (N = 412) depressive disorders. Multiple-group confirmatory factor analysis of the Craighead, Smucker, Craighead, and Ilardi (1998) CDI model supported full measurement invariance and invariance for structural variances and covariances. Invariance for thresholds was also supported by multiple indicators multiple causes (MIMIC) procedures that controlled for the effects of age; sex; and the presence or absence of anxiety disorders, attention-deficit/hyperactivity disorder, and oppositional defiant/conduct disorders. The MIMIC analyses showed that for latent mean scores, the group with depressive disorders had higher scores, with at least medium effect sizes, for Self-Deprecation and Biological Dysregulation. The theoretical, psychometric, and clinical implications of the findings are discussed.     

Multidimensional Latent Classification of ‘Street Robbery’ Offences

In a recent study of personal robbery, commissioned by the Home Office in the UK, a qualitative typology of robbery offences was proposed based on the approach used by the offender to commit the crime, consisting of four approach types: Blitz, Confrontation, Con, and Snatch. Conceptual inspection of the typology reveals that these proposed types may be hypothetically demarcated as the product of two latent dimensions: interaction (between the offender and the victim) and violence (used to threaten/harm the victim). The current paper utilises crime scene information from 72 incarcerated male offenders convicted of ‘street’ robbery to test this hypothesis. Convergent statistical analysis was utilised to test the structure of Smith's typology first using multidimensional scaling (MDS) and then principal component analysis (PCA). MDS and PCA analyses provided convergent support for the existence of the four robbery styles and the latent dimensions of interaction and violence. Implications of Smith's typological structure and latent behavioural dimensions on the conceptualisation and classification of robbery offences are discussed within the existing literature on ‘street’ robbery. Copyright © 2012 John Wiley & Sons, Ltd.     

Evidence for perceptual learning with repeated stimulation after partial and total cortical blindness

Lesions of occipital cortex result in loss of sight in the corresponding regions of visual fields. The traditional view that, apart from some spontaneous recovery in the acute phase, field defects remain permanently and irreversibly blind, has been challenged. In patients with partial field loss, a range of residual visual abilities in the absence of conscious perception (blindsight) has been demonstrated (Weiskrantz, 1986). Recent findings (Sahraie et al., 2006, 2010) have also demonstrated increased visual sensitivity in the field defect following repeated stimulation. We aimed to extend these findings by systematically exploring whether repeated stimulation can also lead to increased visual sensitivity in two cases with total (bilateral) cortical blindness. In addition, for a case of partial blindness, we examined the extent of the recovery as a function of stimulated region of the visual field, over extended periods of visual training. Positive auditory feedback was provided during the training task for correct detection of a spatial grating pattern presented at specific retinotopic locations using a temporal two alternative forced-choice paradigm (Neuro-Eye Therapy). All three cases showed improved visual sensitivity with repeated stimulation. The findings indicate that perceptual learning can occur through systematic visual field stimulation even in cases of bilateral cortical blindness.     

Escalation from Fetish Burglaries to Sexual Violence: A Retrospective Case Study of Former Col., D. Russell Williams

Criminal history narrative studies reveal an escalation in sexual offender behaviour from non‐contact to contact offending, with an ever‐increasing likelihood of sexual violence and homicide. In particular, researchers have found that sexual offenders often have a history of committing burglaries prior to contact offences. Accordingly, researchers have suggested that burglaries may be associated with an increased likelihood of future sexual offending, particularly when they have a sexual element to them. However, to date, there has been little quantitative research focusing on the mechanisms of escalation in sexual offences. This paper seeks to study factors associated with sexual offence escalation in terms of changes in offence seriousness and frequency. Specifically, case evidence was gleaned from a series of fetish burglaries and subsequent sexual assaults and murders committed by the former Canadian Colonel David Russell Williams (RW). Cluster analysis, chi‐square, ANOVA, and regression analyses were conducted on the crime scene information of RW's 82 cases of fetish burglary. Analyses revealed a significant escalation in the frequency and seriousness of RW's fetish burglary offences prior to committing acts of sexual violence and ultimately sexual homicide. Recommendations for future research predicting escalation of sexual offending by frequency and seriousness of offending behaviour are discussed. Copyright © 2013 John Wiley & Sons, Ltd.