Reduced fixation on the upper area of personally familiar faces following acquired prosopagnosia

Selective impairment of face recognition following brain damage, as in acquired prosopagnosia, may cause a dramatic loss of diagnosticity of the eye area of the face and an increased reliance on the mouth for identification ( Caldara et al., 2005 ). To clarify the nature of this phenomenon, we measured eye fixation patterns in a case of pure prosopagnosia (PS, Rossion et al., 2003 ) during her identification of photographs of personally familiar faces (27 children of her kindergarten). Her age‐matched colleague served as a control. Consistent with previous evidence, the normal control identified the faces within two fixations located just below the eyes (central upper nose). This pattern (location and duration) of fixations remained unchanged even by increasing difficulty by presenting anti‐caricatures of the faces. In contrast, the great majority of the patient's fixations, irrespective of her accuracy, were located on the mouth. Overall, these observations confirm the abnormally reduced processing of the upper area of the face in acquired prosopagnosia. Most importantly, the prosopagnosic patient also fixated the area of the eyes spontaneously in between the first and last fixation, ruling out alternative accounts of her behaviour such as, for example, avoidance or failure to orient attention to the eyes, as observed in autistic or bilateral amygdala patients. Rather, they reinforce our proposal of a high‐level perceptual account ( Caldara et al., 2005 ), according to which acquired prosopagnosic patients have lost the ability to represent multiple elements of an individual face as a perceptual unit (holistic face perception). To identify a given face, they focus very precisely on local features rather than seeing the whole of a face from its diagnostic centre (i.e. just below the eyes). The upper area of the face is particularly less attended to and less relevant for the prosopagnosic patient because it contains multiple features that require normal holistic perception in order to be the most diagnostic region. Consequently, prosopagnosic patients develop a more robust representation of the mouth, a relatively isolated feature in the face that may contain more information than any single element of the upper face area, and is thus sampled repeatedly for resolving ambiguity in the process of identification.     

The Cerebellum in Frontotemporal Dementia: a Meta-Analysis of Neuroimaging Studies

Neuropsychology Review - Frontotemporal dementia (FTD) is a neurodegenerative brain disorder primarily affecting the frontal and/or temporal lobes. Three main subtypes have been recognized:...     

The Role of Emotions in a Model of Behavioral Intentions of Visitors to the Gaudí Historic House Museums in Barcelona,Spain

ABSTRACT

This study examined an integrated model of behavioral intentions toward historic house museums, through the simultaneous relationships among visitors' perceptions of the historic house museum, crowding, interactions with employees, emotions about their visit, intention to revisit the museum and recommend it to others, and the moderator effect of price fairness. Seven hundred thirty-six visitors were surveyed after visiting La Pedrera and Casa Batlló, the historic house museums of the architect Antoni Gaudí in Barcelona. The results from a structural equation model indicate that visitors' perception of the historic house museum (i.e., their appreciation of the houses' architecture, aesthetic quality, artistic work, and accessibility), visitors' positive interactions with employees, and low levels of crowding are antecedents of positive emotions, and visitors' positive emotions about their visit are a predictor of intentions to revisit and recommend the museum to others. In addition, price fairness was tested as a moderator effect using multigroup analysis. This analysis consists of comparing two subsamples of visitors, which were selected according to whether they believe the admission price is fair or unfair. The effect between perceptions of the historic house museum and positive emotions, and the effect of positive emotions on behavioral intentions is greater for visitors who found the price fair than for those who found the price unfair. The results lead to recommendations for cultural heritage managers.     

Unconscious and conscious priming by forms and their parts

Using metacontrast masking techniques, in two experiments we compare unconscious and conscious response priming by targets consisting of either whole forms or else their parts. In Experiment 1 we investigate the contribution of whole forms and their figural primitives, viz., edges and corners, to the unconscious priming effect. As expected, choice RTs were fast when the invisible target and visible mask shape pairings were congruent and slower when they were incongruent. This trend, while strongest for whole-targets, also held for the target primes composed only of corners but did not hold for target primes composed only of sides. Experiment 2 showed, replicating the results of Experiment 1, that while invisible corner targets produced weaker priming effects than invisible whole targets, paradoxically visible corner target produced stronger priming effects than visible whole targets. Taken together the results of the two experiments indicate (a) that unconscious target representations and, thus, unconscious priming effects are strongest when the target is a complete rather than a partial configuration, (b) that conjunctions of line or edge orientations forming corners produce stronger unconscious target representations and priming effects than do unconscious target representations formed from nonconjoined edge or line primitives, (c) that metacontrast masking of form occurs at or beyond levels of visual processing at which feature integration of visual form primitives occurs, and (d) that, when consciously perceived, partial forms can act as stronger primes than whole forms.     

The interactive effects of person-focused citizenship behaviour,task interdependence,and virtuality on team performance

A multifactorial between-groups experiment examined the effects of person-focused organizational citizenship behaviours (OCBP) on the performance of teams characterized by different levels of virtuality and task interdependence. Results reveal in low virtual teams the moderating effects of task interdependence on the OCBP–team performance relationship are positive; however, these effects are reversed in high virtual teams. Using social presence and task–technology fit theories, our results indicate that task context affects how OCBP impacts team performance, particularly across different levels of team virtuality. The implications for research on OCB and the management of virtual teams are discussed.     

Unravelling Criteria for Assessing the Performance of Salespeople: A Causal Analysis

Abstract

In the past, academic research on sales force performance has used either objective performance data or subjective managerial ratings to measure sales performance. Consistent with corporate practices, objective and subjective performance measures were used in this research project. The relationships among three components of performance: specific task behaviors, specific goal achievement and overall performance were examined. A casual analysis suggests that managerial evaluations of overall sales performance are influenced by their perceptions of specific selling behaviors and the degree to which sales people attain specified performance goals.     

The interpretation of dreams a classic revisited

In this centenary of Freud's The Interpretation of Dreams it is important to revisit this classic, to discuss why it is a classic, to consider what has been learned since its publication, and to discuss what changes in our understanding of dreams and dreaming are called for. To this end, we briefly discuss some of the main themes of the book. Then we review both changes in psychoanalytic thinking and theory and the results of many studies made possible by the discovery of the electro‐encephalographic changes that occur during sleep and their relevance for understanding dreams and their function. We suspect that Freud would have been delighted to know about this explosion of information about the physiology of dreaming. With this in mind, we consider the need for modification of some of Freud's theories while noting that his basic contribution, that dreams are meaningful and understandable, has been amply confirmed. We then discuss these observations in relation to how we approach working with dreams.     

On the Deductive System of the Order of an Equationally Orderable Quasivariety

We consider the equationally orderable quasivarieties and associate with them deductive systems defined using the order. The method of definition of these deductive systems encompasses the definition of logics preserving degrees of truth we find in the research areas of substructural logics and mathematical fuzzy logic. We prove several general results, for example that the deductive systems so defined are finitary and that the ones associated with equationally orderable varieties are congruential.     

Assessment of emotional reactivity to food images in bulimia nervosa

The aim of the study was to assess the influence on reactivity to food images of the following variables: craving-trait, positive or negative mood state, and food restriction. Emotional modulation of the defense startle reflex (RMS) was assessed in 26 women at risk of suffering from bulimia nervosa; they were assigned one of to two groups: high craving-trait and low craving-trait. Before the test, positive or negative mood and restriction vs. non-restriction states were induced in each of the groups. Skin conductance response (SCR) and electromyogram activity from the orbiculari oculi region were recorded after the auditory stimuli; questionnaires such as Food Craving Trait Questionnaire (FCQ-T) and the Self-assessment Manikin (SAM) were used. Results showed that negative affect produced a negative valence of food images, more arousal, and more loss of control, as well as higher SCRs. Subjects with low FCQ-T levels reduced their RMS to food images as a consequence of experiencing positive emotions; when emotions were negative, their RMS increased.