TMS to the “occipital face area” affects recognition but not categorization of faces

The human cortical system for face perception is comprised of a network of connected regions including the middle fusiform gyrus (“fusiform face area” or FFA), the inferior occipital cortex (“occipital face area” or OFA), and the superior temporal sulcus. The traditional hierarchical feedforward model of visual processing suggests information flows from early visual cortex to the OFA for initial face feature analysis to higher order regions including the FFA for identity recognition. However, patient data suggest an alternative model. Patients with acquired prosopagnosia, an inability to visually recognize faces, have been documented with lesions to the OFA but who nevertheless show face-selective activation in the FFA. Moreover, their ability to categorize faces remains intact. This suggests that the FFA is not solely responsible for face recognition and the network is not strictly hierarchical, but may be organized in a reverse hierarchical fashion. We used transcranial magnetic stimulation (TMS) to temporarily disrupt processing in the OFA in neurologically-intact individuals and found participants’ ability to categorize intact versus scrambled faces was unaffected, however face identity discrimination was significantly impaired. This suggests that face categorization but not recognition can occur without the “earlier” OFA being online and indicates that “lower level” face category processing may be assumed by other intact face network regions such as the FFA. These results are consistent with the patient data and support a non-hierarchical, global-to-local model with re-entrant connections between the OFA and other face processing areas.     

Mental illness has multiple causes: beliefs on causes of mental illness by congregants of selected neo-prophetic churches in Ghana

ABSTRACT

The present study explored perceived causes of, and preferred treatment approach for, mental illness among congregants of six Neo-prophetic churches in Accra and Kumasi through in-depth interviews. Using thematic analysis, five themes emerged from participants’ causal attributions of mental illness. These included lifestyles and environmental stressors, spiritual causes, interaction of multiple factors, trauma and biological causes. Additionally, participants discussed four main mechanisms through which stress leads to mental illness. These included persistent worrying over stressors, use of inappropriate coping strategies to cope with stress, refusal to talk about one's problems and individuals’ appraisal of stress and available coping resources. These beliefs directly determined congregants’ preferred treatment approach. Implications of the findings are discussed.     

Academic Centrarchy: a Political System of Governing Education and Technology

Journal of Academic Ethics - This article relies on two international projects to argue for the existence of a ‘centrarchy’ in the fields of education and technology (and beyond)....     

Re-evaluating visual and auditory dominance through modality switching costs and congruency analyses

Competition between the senses can lead to modality dominance, where one sense influences multi-modal processing to a greater degree than another. Modality dominance can be influenced by task demands, speeds of processing, contextual influence and practice. To resolve previous discrepancies in these factors, we assessed modality dominance in an audio-visual paradigm controlling for the first three factors while manipulating the fourth. Following a uni-modal task in which auditory and visual processing were equated, participants completed a pre-practice selective attention bimodal task in which the congruency relationship and task-relevant modality changed across trials. Participants were given practice in one modality prior to completing a post-practice selective attention bimodal task similar to the first. The effects of practice were non-specific as participants were speeded post-practice relative to pre-practice. Congruent stimuli relative to incongruent stimuli, also led to increased processing efficiency. RT data tended to reveal symmetric modality switching costs whereas the error rate data tended to reveal asymmetric modality switching costs in which switching from auditory to visual processing was particularly costly. The data suggest that when a number of safeguards are put in place to equate auditory and visual responding as far as possible, evidence for an auditory advantage can arise.     

Letter processing and font information during reading: Beyond distinctiveness, where vision meets design

Letter identification is a critical front end of the reading process. In general, conceptualizations of the identification process have emphasized arbitrary sets of distinctive features. However, a richer view of letter processing incorporates principles from the field of type design, including an emphasis on uniformities across letters within a font. The importance of uniformities is supported by a small body of research indicating that consistency of font increases letter identification efficiency. We review design concepts and the relevant literature, with the goal of stimulating further thinking about letter processing during reading.     

To Apologize or Justify: Leader Responses to Task and Relational Mistakes

Abstract

Leadership roles are complex, creating an environment where leaders are likely to make mistakes that result in negative outcomes. We shift the conversation in the literature from examining the effectiveness of mistake responses toward exploring why leaders use different mistake recovery methods. We employ an online experimental method to distinguish between task and relationship mistakes for leaders and suggest that different attributions are made for these two types of mistakes (Study 1). We found that task mistakes are viewed by leaders as more specific and less personal, and that relationship mistakes are viewed as more global, describing the leader’s stable characteristics rather than a specific event. From these findings, we predict that leaders are more likely to apologize for task mistakes and are more likely to justify their relationship mistakes rather than admit wrongdoing for them. We find support for these predictions using a mixed methods approach, employing a laboratory experiment (Study 2) and a critical incident method surveying a panel of leaders (Study 3). As such, this paper extends our understanding of the mistake recovery process for leaders by demonstrating that 1) leaders’ relationship mistakes are viewed as more globally representative of the leader than task mistakes, and 2) leaders are more likely to apologize for task mistakes but more likely to justify relationship mistakes. Relational and task mistakes, however, were not found to be different in regard to their ambiguity or the extent to which they were viewed as a mistake.