Multisensory processing in the redundant-target effect: a behavioral and event-related potential study

Participants respond more quickly to two simultaneously presented target stimuli of two different modalities (redundant targets) than would be predicted from their reaction times to the unimodal targets. To examine the neural correlates of this redundant-target effect, event-related potentials (ERPs) were recorded to auditory, visual, and bimodal standard and target stimuli presented at two locations (left and right of central fixation). Bimodal stimuli were combinations of two standards, two targets, or a standard and a target, presented either from the same or from different locations. Responses generally were faster for bimodal stimuli than for unimodal stimuli and were faster for spatially congruent than for spatially incongruent bimodal events. ERPs to spatially congruent and spatially incongruent bimodal stimuli started to differ over the parietal cortex as early as 160 msec after stimulus onset. The present study suggests that hearing and seeing interact at sensory-processing stages by matching spatial information across modalities.     

Self-Healing Forces and Concepts of Health and Disease. A Historical Discourse

The phenomenon of self-healing forces has again and again challenged doctors in the different historical periods of medical science. They relied on effects of self-healing forces in diagnosis and therapy. They also tried to explain these effects based on the current model of organism. The understanding of this phenomenon has always influenced the understanding of therapy and played a role in defining the concept of health and disease. In the 17th and 18th century the idea of self-healing force was interpreted as a phenomenon related to the organic forces, whereas in the 19th century the explanation was reduced to a materialistic mechanism. Nowadays the knowledge of heath-shock-proteins open the way of a new understanding of the organic defense mechanisms. This revised version was published online in August 2006 with corrections to the Cover Date.     

Unanswered Prayers: Religiosity and the God-Serving Bias

Two self-report experiments examined how religiosity affects attributions made for a target person’s death. Online adults (Study 1, N = 427) and undergraduate students (Study 2, N = 326) read about Chris who had a heart attack, used religious or health behaviors, and lived or died. Participants made attributions to Chris and God (both studies), and reported their emotions (Study 2). Participants made more attributions to Chris when he lived than when he died, but only when he used health behaviors. The highly religious made more attributions to God, but not when Chris used religious behaviors and died (the God-serving bias); they reported the most positive emotions when Chris lived after using religious behaviors (the Hallelujah effect). Directions for future research in terms of implicit religious beliefs and normative evaluations of religion are discussed.     

INSIGHTFULNESS AND LATER INFANT ATTACHMENT IN CLINICALLY DEPRESSED AND NONCLINICAL MOTHERS

The aim of this pilot study was to investigate the relationship between maternal insightfulness and sensitivity and subsequent infant attachment security and disorganization in clinically depressed and nonclinical mother–infant groups. Nineteen depressed mothers with infants ages 3 to 11 months participated in this study. Twenty nonclinical mother–infant dyads were matched to the clinical sample according to infant sex and age. Maternal depression was assessed using the Diagnostic and Statistical Manual of Mental Disorders, fourth edition (American Psychiatric Association, 1994), insightfulness using the Insightfulness Assessment (IA), and sensitivity using the Maternal Sensitivity Scales (M.D.S. Ainsworth, 1969). IA classifications and subscales were considered separately. Later infant attachment was assessed by the Strange Situation Procedure (M.D.S. Ainsworth, M.C. Blehar, E. Waters, & S. Wall, 1978). Depressed mothers tended to have less securely attached children than did nonclinical mothers. Within the clinical sample, the insightfulness categories correlated slightly moderately with attachment security, but were not related to attachment disorganization. Within the nonclinical sample, the IA categories were slightly moderately associated with attachment security and with disorganization. On IA subscales, relationship patterns differed in clinically depressed and nonclinical mother–infant dyads. These findings provide the first evidence of the predictive power of the IA categorization and subscales on subsequent infant attachment. They also may allow the development of different foci of intervention for enhancing insightful caregiving.     

Spatial Segregation and the Impact of Linguistic Multicultural Policies Within the USA

In this article, we examine the impact of multicultural linguistic policy on the residential outcomes of Hispanic and Asian groups in the USA. Arguments linking multiculturalism to residential segregation outcomes are a hotly contested political issue. While spatial segregation is one form of social integration for immigrants, scholars are particularly concerned with residential outcomes because it is theorized to strongly facilitate a wide variety of other forms of integration including language acquisition, the convergence of socio-cultural gender and sexual norms, employment, friendship ties, and intermarriage. From data drawn from the 2010 U.S. Census, we calculate the dissimilarity index for these two groups. We find multicultural linguistic policies increase segregation levels between Asians and non-Hispanic whites, but not between Hispanics and non-Hispanic whites. The results are robust to a host of alternative explanations and model specifications. However, the estimated positive effect of linguistic policy is modest at best and run contrary to fears that multiculturalist policies drastically alter residential outcomes. We close by questioning normative accounts that problematize rising levels of segregation within ethnic communities, which are a far cry from the minority ghettos that are politically portrayed.     

Task-irrelevant sounds influence both temporal order and apparent-motion judgments about tactile stimuli applied to crossed and uncrossed hands

It has been suggested that judgments about the temporal–spatial order of successive tactile stimuli depend on the perceived direction of apparent motion between them. Here we manipulated tactile apparent-motion percepts by presenting a brief, task-irrelevant auditory stimulus temporally in-between pairs of tactile stimuli. The tactile stimuli were applied one to each hand, with varying stimulus onset asynchronies (SOAs). Participants reported the location of the first stimulus (temporal order judgments: TOJs) while adopting both crossed and uncrossed hand postures, so we could scrutinize skin-based, anatomical, and external reference frames. With crossed hands, the sound improved TOJ performance at short (≤300 ms) and at long (>300 ms) SOAs. When the hands were uncrossed, the sound induced a decrease in TOJ performance, but only at short SOAs. A second experiment confirmed that the auditory stimulus indeed modulated tactile apparent motion perception under these conditions. Perceived apparent motion directions were more ambiguous with crossed than with uncrossed hands, probably indicating competing spatial codes in the crossed posture. However, irrespective of posture, the additional sound tended to impair potentially anatomically coded motion direction discrimination at a short SOA of 80 ms, but it significantly enhanced externally coded apparent motion perception at a long SOA of 500 ms. Anatomically coded motion signals imply incorrect TOJ responses with crossed hands, but correct responses when the hands are uncrossed; externally coded motion signals always point toward the correct TOJ response. Thus, taken together, these results suggest that apparent-motion signals are likely taken into account when tactile temporal–spatial information is reconstructed.

     

Ophthalmological,cognitive, electrophysiological and MRI assessment of visual processing in preterm children without major neuromotor impairment

Many studies report chronic deficits in visual processing in children born preterm. We investigated whether functional abnormalities in visual processing exist in children born preterm but without major neuromotor impairment (i.e. cerebral palsy). Twelve such children (< 33 weeks gestation or birthweight < 1000 g) without major neuromotor impairment and 12 born full‐term controls were assessed at 8–12 years of age by means of ophthalmological assessment (visual acuity, colour vision, stereopsis, stereoacuity, visual fields, ocular motility, motor fusion), cognitive tests of visual‐motor, visual‐perceptual and visual‐spatial skills and pattern‐reversal visual evoked potentials (PR‐VEPs). All participants also underwent magnetic resonance imaging (MRI) of the brain and neuromotor assessments. No significant differences were found between the groups on the ophthalmological, visual cognitive, neurological, neuromotor or MRI measures. The P100 component of the PR‐VEP showed a significantly shorter latency in the preterm compared with the full‐term participants. Whilst this P100 finding suggests that subtle abnormalities may exist at the neurophysiological level, we conclude that visual dysfunction is not systematically associated with preterm birth in the context of normal neurological status.