7,912 research outputs found
Good Enough for Government Work: The Constitutional Duty to Preserve Forensic Interviews of Child Victims
McGough proceeds with the confidence on the premise that a forensic interview of a child by a member of the prosecutorial team offers many opportunities for compromising the reliability of the child\u27s remembered account. A vast volume of research data now exists that documents the conclusion that the forensic interviewing of children is a very delicate, sophisticated, and high-risk enterprise
The significance of memory in sensory cortex
Early sensory cortex is typically investigated in response to sensory stimulation, masking the contribution of internal signals. Recently, van Kerkoerle and colleagues reported that attention and memory signals segregate from sensory signals within specific layers of primary visual cortex, providing insight into the role of internal signals in sensory processing
Forecasting faces in the cortex: Comment on ‘High-level prediction signals in a low-level area of the macaque face-processing hierarchy’, by Schwiedrzik and Freiwald, Neuron (2017)
Although theories of predictive
coding in the brain abound, we
lack key pieces of neuronal data
to support these theories.
Recently, Schwiedrzik and Freiwald
found neurophysiological
evidence for predictive codes
throughout the face-processing
hierarchy in macaque cortex. We
highlight how these data enhance
our knowledge of cortical information
processing, and the impact of
this more broadly
The laminar integration of sensory inputs with feedback signals in human cortex
The cortex constitutes the largest area of the human brain. Yet we have only a basic understanding of how the cortex performs one vital function: the integration of sensory signals (carried by feedforward pathways) with internal representations (carried by feedback pathways). A multi-scale, multi-species approach is essential for understanding the site of integration, computational mechanism and functional role of this processing. To improve our knowledge we must rely on brain imaging with improved spatial and temporal resolution and paradigms which can measure internal processes in the human brain, and on the bridging of disciplines in order to characterize this processing at cellular and circuit levels. We highlight apical amplification as one potential mechanism for integrating feedforward and feedback inputs within pyramidal neurons in the rodent brain. We reflect on the challenges and progress in applying this model neuronal process to the study of human cognition. We conclude that cortical-layer specific measures in humans will be an essential contribution for better understanding the landscape of information in cortical feedback, helping to bridge the explanatory gap
Contributions of cortical feedback to sensory processing in primary visual cortex
Closing the structure-function divide is more challenging in the brain than in any other organ (Lichtman and Denk, 2011). For example, in early visual cortex, feedback projections to V1 can be quantified (e.g., Budd, 1998) but the understanding of feedback function is comparatively rudimentary (Muckli and Petro, 2013). Focusing on the function of feedback, we discuss how textbook descriptions mask the complexity of V1 responses, and how feedback and local activity reflects not only sensory processing but internal brain states
What do peer support workers do? A job description.
BackgroundThe extant literature suggests that poorly defined job roles make it difficult for peer support workers to be successful, and hinder their integration into multi-disciplinary workplace teams. This article uses data gathered as part of a participatory evaluation of a peer support program at a psychiatric tertiary care facility to specify the work that peers do.MethodsData were gathered through interviews, focus groups, and activity logs and were analyzed using a modified grounded theory approach.ResultsPeers engage in direct work with clients and in indirect work that supports their work with clients. The main types of direct work are advocacy, connecting to resources, experiential sharing, building community, relationship building, group facilitation, skill building/mentoring/goal setting, and socialization/self-esteem building. The main types of indirect work are group planning and development, administration, team communication, supervision/training, receiving support, education/awareness building, and information gathering and verification. In addition, peers also do work aimed at building relationships with staff and work aimed at legitimizing the peer role. Experience, approach, presence, role modeling, collaboration, challenge, and compromise can be seen as the tangible enactments of peers' philosophy of work.ConclusionsCandidates for positions as peer support workers require more than experience with mental health and/or addiction problems. The job description provided in this article may not be appropriate for all settings, but it will contribute to a better understanding of the peer support worker position, the skills required, and the types of expectations that could define successful fulfillment of the role
Cortical feedback signals generalise across different spatial frequencies of feedforward inputs
Visual processing in cortex relies on feedback projections contextualising feedforward information flow. Primary visual cortex (V1) has small receptive fields and processes feedforward information at a fine-grained spatial scale, whereas higher visual areas have larger, spatially invariant receptive fields. Therefore, feedback could provide coarse information about the global scene structure or alternatively recover fine-grained structure by targeting small receptive fields in V1. We tested if feedback signals generalise across different spatial frequencies of feedforward inputs, or if they are tuned to the spatial scale of the visual scene. Using a partial occlusion paradigm, functional magnetic resonance imaging (fMRI) and multivoxel pattern analysis (MVPA) we investigated whether feedback to V1 contains coarse or fine-grained information by manipulating the spatial frequency of the scene surround outside an occluded image portion. We show that feedback transmits both coarse and fine-grained information as it carries information about both low (LSF) and high spatial frequencies (HSF). Further, feedback signals containing LSF information are similar to feedback signals containing HSF information, even without a large overlap in spatial frequency bands of the HSF and LSF scenes. Lastly, we found that feedback carries similar information about the spatial frequency band across different scenes. We conclude that cortical feedback signals contain information which generalises across different spatial frequencies of feedforward inputs
Psychological Climate and Work Attitudes: The Importance of Telling the Right Story
In this field study, the authors explore how choosing one context over another influences both research results and implications. Using both quantitative and qualitative data, the authors examine context from both an organizational and a business-unit perspective by studying relationships between five psychological climate variables and outcomes of job satisfaction, affective commitment, and intent to leave. Results show different contextual influences between the organization and two business units, suggesting that different bundles of psychological climate variables yield similar outcomes depending on the context studied. These results bolster the contention that researchers need to identify the right context in field research
Let me inform you how to tell a convincing story: CBCA and Reality Monitoring Scores as a function of age, coaching and deception
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