Motion-induced blindness measured objectively

During central fixation, a moving pattern of nontargets induces repeated temporary blindness to even salient peripheral targets: motion-induced blindness (MIB). Hitherto, behavioral measures of MIB have relied on subjective judgments. Here, we offer an objective alternative that builds on earlier findings regarding the effects of MIB on the detectability of physical target offsets. We propose a small modification of regular MIB displays: Following a variable duration (lead time), one of the targets is physically removed. Subjects are to respond immediately afterward. We hypothesize that illusory target offsets, caused by MIB, are mistaken for physical target offsets and that errors should thus increase with lead time. Indeed, for both nonsalient and salient targets, we found that detection accuracy for physical target offsets dramatically decreased with lead time. We conclude that target offset detection accuracy is a valid objective measure of MIB. With our method, effects of guessing are minimal, and the fitting of psychometric functions is straightforward. In principle, a staircase extension—for more efficient data collection—is also possible.     

Is obesity treated like a contagious disease?

The behavioral avoidance of people with obesity is well documented, but its psychological basis is poorly understood. Based upon a disease avoidance account of stigmatization, we tested whether a person with obesity triggers equivalent self-reported emotional and avoidant-based responses as a contagious disease (i.e., influenza). Two hundred and sixty-four participants rated images depicting real disease signs (i.e., person with influenza), false alarms (i.e., person with obesity), person with facial bruising (i.e., negative control), and a healthy control for induced emotion and willingness for contact along increasing levels of physical proximity. Consistent with our prediction, as the prospect for contact became more intimate, self-reported avoidance was equivalent in the influenza and obese target conditions, with both significantly exceeding reactions to the negative and healthy controls. In addition, participants reported greatest levels of disgust toward the obese and influenza target conditions. These results are consistent with an evolved predisposition to avoid individuals with disease signs. Implicit avoidance occurs even when participants know explicitly that such signs—here, obese body form—result from a noncontagious condition. Our findings provide important evidence for a disease avoidance explanation of the stigmatization of people with obesity.     

De Finetti’s No-Dutch-Book Criterion for Gödel logic

We extend de Finetti’s No-Dutch-Book Criterion to Gödel infinite-valued propositional logic.     

Minority influence: the role of ambivalence toward the source

According to literature on social influence, a minority source may indirectly influence group members by fostering ambivalent reactions. Two studies were carried out in order to provide empirical support for this theoretical assumption. In Study 1 participants (n = 133), were exposed to a counter‐attitudinal minority message and ambivalence was manipulated by facilitating the accessibility of either ambivalent (positive and negative) or univalent (positive or negative) thoughts toward the source. We predicted and found more indirect influence in ambivalent condition than in univalent conditions. No effect of ambivalence on direct influence was found. In Study 2 (n = 127), ambivalence was measured and two possible antecedents of ambivalence, consistency of the minority and personal relevance of the topic for participants, were taken into account. Findings suggest that ambivalence mediates the effects of the two factors on indirect influence. In sum, these studies provide evidence of the importance of ambivalence in minority influence context, an early assumption that was still lacking in strong empirical support. Copyright © 2007 John Wiley & Sons, Ltd.     

Intrapsychic-Interpsychic

The ‘interpsychic’ is an extended psychic dimension, regarding the joint functioning and reciprocal influences of two minds. The concepts of ‘subjectivity’ and ‘person’ can be included in the ‘interpsychic’. They can also overlap with each other, and sometimes all three can overlap together, but they do not necessarily coincide. In the different contemporary perspectives, how can we modify the intrapsychic ‘through’ (and ‘with’ and ‘by’) the interpsychic? Presenting four clinical vignettes, the author progressively moves from the theoretical positions that emphasise the exploration and the elaboration of the intrapsychic mainly through the intrapsychic, to the positions that emphasise the same operations mainly through the interpsychic. The last part of the paper deals with the technical use of the interpsychic dimension: the analytic dialogue, when interpsychically experienced (from inside), gains a new, more specific effectiveness, first in containing and then in symbolising. In an intense mental ‘cohabitation’ inside the analytic working pair, it is very often clearly experienced as ‘true’ (as in dreams).     

Facial Expressions and the Ability to Recognize Emotions from the Eyes or Mouth: A Comparison Between Children and Adults

The authors sought to contribute to the literature on the ability to recognize anger, happiness, fear, surprise, sadness, disgust, and neutral emotions from facial information. They aimed to investigate if—regardless of age—this pattern changes. More specifically, the present study aimed to compare the difference between the performance of adults and 6- to 7-year-old children in detecting emotions from the whole face and a specific face region, namely the eyes and mouth. The findings seem to indicate that, for both groups, recognizing disgust, happiness, and surprise is facilitated when pictures represent the whole face. However, with regard to a specific region, a prevalence for children was not found between the eyes and mouth. Meanwhile, for adults, would seem to detect a greater role of the eye region. Finally, regarding the differences in the performance of emotions recognition, adults are better only in a few cases, whereas children are better in recognizing anger from the mouth.     

Day-Hospital Multifocal Integrated Treatment for Anorexia Nervosa in Adolescents: A One-Year Follow-Up

The current guidelines for treatment of Anorexia Nervosa (AN) in children and adolescents recommend an integrated multidisciplinary approach as the elective intervention for this disorder. Nevertheless, there is insufficient evidence on the results of an integrated approach for the treatment of AN adolescent patients, especially in a Hospital setting. This study aims to analyze clinical and psychological changes occurring in adolescent patients after completion of a Day-Hospital Multifocal Integrated Treatment (MIT) for Anorexia Nervosa. The sample consisted of 60 adolescents with AN or Eating Disorder Not Otherwise Specified (EDNOS) restrictive type, aged 11 to 18 years, and their parents. Clinical course was evaluated at 3, 6 and 12-month follow-up periods. Our results showed clinical remission in a good percentage of patients. In general, we found a significant reduction of the eating psychopathology, whereas we did not detect any significant improvement in body dissatisfaction, perfectionism, and relational difficulties. This positive trend was confirmed at 3, 6, and 12-month follow-up, despite the increase of drop-outs. These results suggest that the proposed treatment is reasonably effective, because it aims to contain and reduce the acute phase of the disease in a limited time and in a hospital setting, but it is necessary to continue the treatment with targeted psychotherapeutic interventions to address the deeper psychological discomfort underlying the eating disorder.     

Working memory in healthy aging and in Parkinson’s disease: evidence of interference effects

Focusing on relevant information while suppressing the irrelevant one are critical abilities for different cognitive processes. However, their functioning has been scarcely investigated in the working memory (WM) domain, in both healthy and pathological conditions. The present research aimed to study these abilities in aging and Parkinson’s disease (PD), testing three groups of healthy participants (young, older and elderly) and one of PD patients, employing a new experimental paradigm. Results showed that the transient storing of irrelevant information in WM causes substantial interference effects, which were remarkable in elderly individuals on both response latency and accuracy. Interestingly, PD patients responded faster and were equally accurate compared to a matched control group. Taken together, findings confirm the existence of similar mechanisms for orienting attention inwards to WM contents or outwards to perceptual stimuli, and suggest the suitability of our task to assess WM functioning in both healthy aging and PD.     

In judo,Randori (free fight) and Kata (highly ritualized fight) differentially change plasma cortisol,testosterone, and interleukin levels in male participants

Two forms of competitive encounters namely Randori (free fight) and Kata (highly ritualized fight) were studied in 22 professional male judo fighters. The dyadic, symmetrical (in terms of body weight and fighting ability) encounters were videotaped to assess relationships between agonistic behavior and individual variations in plasma levels of testosterone (T), cortisol (C) and interleukins (IL‐6 and IL‐1β) measured before and after the competition. Unremarkably, winners showed longer attack but devoted less time to defensive behaviors when compared to losers. T increased only during Randori but the individual pre‐ and post‐competition T levels recorded in such fights were strongly correlated with the corresponding measures in the Kata for the same individuals. Interestingly, the pre‐ and post‐Randori competition T levels were higher in losers than in winners and T variations positively correlated with the frequencies of attacks and with the duration of defensive postures. The T response shows individual variation and seems to reflect evaluation of the likelihood of winning or losing. Both Randori and Kata induced a marked C increase, although the pre‐ and post‐Randori hormonal titers were higher than those found for the Kata. IL‐6 significantly increased between the pre‐ and the post‐Randori competition, but no such changes occurred during the Kata. No correlations were found between individual pre‐ and post‐competition C and IL‐6 and IL‐1β levels in either Randori or Kata. This suggests that C and cytokine release are unrelated to emotional or cognitive perception of the possible outcome of fighting but are a consequence of general motor activity. Martial arts appear to provide good human models to understand: (a) the relationships between conflict, hormones and the immune system and (b) the relationships between mood and physiological responses to competitive aggression. Aggr. Behav. 32:1–9, 2006. © 2006 Wiley‐Liss, Inc.