Gaze stability of observers watching Op Art pictures

It has been the matter of some debate why we can experience vivid dynamic illusions when looking at static pictures composed from simple black and white patterns. The impression of illusory motion is particularly strong when viewing some of the works of 'Op Artists, such as Bridget Riley's painting Fall. Explanations of the illusory motion have ranged from retinal to cortical mechanisms, and an important role has been attributed to eye movements. To assess the possible contribution of eye movements to the illusory-motion percept we studied the strength of the illusion under different viewing conditions, and analysed the gaze stability of observers viewing the Riley painting and control patterns that do not produce the illusion. Whereas the illusion was reduced, but not abolished, when watching the painting through a pinhole, which reduces the effects of accommodation, it was not perceived in flash afterimages, suggesting an important role for eye movements in generating the illusion for this image. Recordings of eye movements revealed an abundance of small involuntary saccades when looking at the Riley pattern, despite the fact that gaze was kept within the dedicated fixation region. The frequency and particular characteristics of these rapid eye movements can vary considerably between different observers, but, although there was a tendency for gaze stability to deteriorate while viewing a Riley painting, there was no significant difference in saccade frequency between the stimulus and control patterns. Theoretical considerations indicate that such small image displacements can generate patterns of motion signals in a motion-detector network, which may serve as a simple and sufficient, but not necessarily exclusive, explanation for the illusion. Why such image displacements lead to perceptual results with a group of Op Art and similar patterns, but remain invisible for other stimuli, is discussed.     

The otolaryngologist's role in management of hearing loss in infancy and childhood

This article reviews the role of the otolaryngologist-head and neck surgeon-in the diagnosis and treatment of hearing loss in infants and young children. The otolaryngologist is well-versed in the anatomy, physiology, and pathophysiology of the auditory system, as well as the craniofacial syndromes that can involve the head and neck in combination with deafness. In this paper, the various causes of congenital hearing loss are described, as well as the steps required for proper diagnosis. Finally, surgeries used by otolaryngologists to treat childhood hearing loss, their indications, and outcomes, are discussed.     

Sociability and susceptibility to the common cold

There is considerable evidence that social relationships can influence health, but only limited evidence on the health effects of the personality characteristics that are thought to mold people's social lives. We asked whether sociability predicts resistance to infectious disease and whether this relationship is attributable to the quality and quantity of social interactions and relationships. Three hundred thirty-four volunteers completed questionnaires assessing their sociability, social networks, and social supports, and six evening interviews assessing daily interactions. They were subsequently exposed to a virus that causes a common cold and monitored to see who developed verifiable illness. Increased sociability was associated in a linear fashion with a decreased probability of developing a cold. Although sociability was associated with more and higher-quality social interactions, it predicted disease susceptibility independently of these variables. The association between sociability and disease was also independent of baseline immunity (virus-specific antibody), demographics, emotional styles, stress hormones, and health practices.     

Long-term stability of the Child Behavior Checklist in a clinical sample of youth with attention deficit hyperactivity disorder.

Evaluated the long-term stability of the Child Behavior Checklist (CBCL) in a longitudinal clinical sample of youth with attention deficit hyperactivity disorder (ADHD), testing the hypothesis that the CBCL scales will show stability over time. Participants were 105 Caucasian, non-Hispanic boys with ADHD between the ages of 6 and 17 assessed at baseline and at a 4-year follow-up. Stability of CBCL scales were computed for dimensional (intraclass correlation coefficients [ICCs], Pearson correlations) and dichotomized scale scores (kappa coefficients and odds ratios [ORs]). Evidence was found for stability of the categorical and dimensional types of scores, as demonstrated by statistically significant stability of the Pearson correlation coefficients, kappas, and ORs. The robust findings obtained from ICCs and kappa coefficients document substantial stability for CBCL scales over time within individuals with ADHD. These results support the informativeness of the CBCL as a useful measure of longitudinal course in clinical samples of youth with ADHD.     

The Inner World of the First Half of Life: Analytical Psychology's Forgotten Developmental Stage

The field of analytical psychology has largely ignored the developmental stage that Jung termed the “first half of life.” As a result, a great many individuals coming of age today, starving for guidance on how to live in relationship to their inner lives, find little that reflects them within the Jungian literature or community. This article addresses that issue, identifying some of the challenges that individuals in the first half of life face today, including the lack of traditional supports to guide their transition from childhood into adulthood, and the popularly termed “quarter-life crisis” that often marks this stage. This article also questions the assumptions within the field that tie individuation to the second half of life, and it explores the relationship with the inner world that is possible earlier in life.     

The Role of BIS Sensitivity in the Relationship Between Family Enmeshment and Child Anxiety

Previous work has demonstrated that three overarching vulnerabilities–genetic, environmental, and temperamental–contribute to the development of child anxiety. The purpose of our study was to assess: (a) the relationship between an environmental vulnerability, family enmeshment, and child anxiety; (b) whether parental anxiety accounts for this relationship; and (c) whether this relationship is mediated by levels of child Behavioral Inhibition System sensitivity, a highly persistent temperamental variable demonstrating positive associations with child anxiety. Our study included 38 Canadian parent–child dyads from an urban area, of which 33 children were Caucasian and 18 were girls. Children were aged 9 or 11 years (M = 10.21, SD = 1.07). Children completed measures of anxiety and sensitivity towards threat and parents completed measures of family enmeshment. The results supported a significant positive relationship between family enmeshment and child anxiety; parental anxiety did not account for this relationship; and the relationship was partially mediated by Behavioral Inhibition System sensitivity. Specifically, when the effect of Behavioral Inhibition System sensitivity was controlled for, the association between family enmeshment and child anxiety became non-significant. The results suggest that family enmeshment is associated with levels of child anxiety largely through the function of children’s sensitivity to threat. Enmeshed families may increase children’s susceptibility to anxiety through their effect on child temperament, specifically sensitivity to threat.