Showing papers by "Chaminade University of Honolulu published in 2003"
TL;DR: The relationship between negative and positive SCPs and changes in the BOLD signal of the fMRI were examined in ten subjects who were trained to successfully self-regulate their SCPs, suggesting thatnegative and positive electrocortical potential shifts in the EEG are related to distinct differences in cerebral activation detected by fMRI and support animal studies showing parallel activations in f MRI and neuroelectric recordings.
Abstract: In humans, surface-negative slow cortical potentials (SCPs) originating in the apical dendritic layers of the neocortex reflect synchronized depolarization of large groups of neuronal assemblies. They are recorded during states of behavioural or cognitive preparation and during motivational states of apprehension and fear. Surface positive SCPs are thought to indicate reduction of cortical excitation of the underlying neural networks and appear during behavioural inhibition and motivational inertia (e.g. satiety). SCPs at the cortical surface constitute summated population activity of local field potentials (LFPs). SCPs and LFPs may share identical neural substrates. In this study the relationship between negative and positive SCPs and changes in the BOLD signal of the fMRI were examined in ten subjects who were trained to successfully self-regulate their SCPs. FMRI revealed that the generation of negativity (increased cortical excitation) was accompanied by widespread activation in central, pre-frontal, and parietal brain regions as well as the basal ganglia. Positivity (decreased cortical excitation) was associated with widespread deactivations in several cortical sites as well as some activation, primarily in frontal and parietal structures as well as insula and putamen. Regression analyses revealed that cortical positivity was predicted with high accuracy by pallidum and putamen activation and supplementary motor area (SMA) and motor cortex deactivation, while differentiation between cortical negativity and positivity was revealed primarily in parahippocampal regions. These data suggest that negative and positive electrocortical potential shifts in the EEG are related to distinct differences in cerebral activation detected by fMRI and support animal studies showing parallel activations in fMRI and neuroelectric recordings.
79 citations
TL;DR: In this paper, an organizational role approach was used to assess the effect of the responsible actor's hierarchical position and whether he or she acted as an individual or as part of a group on blame and credit attributions.
Abstract: Attributing blame for performance failure and credit for success is ubiquitous in organizations. These responsibility attributions can play an important role in aligning individual and organizational performance expectations, but may also exacerbate conflict in groups and organizations. Theory suggests that an actor's organizational role will affect blame and credit attributions, yet empirical work on this prediction is lacking. This article tests an organizational role approach by assessing the effect of the responsible actor's hierarchical position and whether he or she acted as an individual or as part of a group on blame and credit attributions. The study finds that in response to organizational failures and successes leadership roles attract more blame than other positions, but in contrast to previous predictions, these roles do not attract more credit than lower level roles. In addition, upper level positions tend to be assigned greater blame than credit, while lower level positions show a reversed pattern: they attract more credit than blame. Groups are less likely to be assigned blame and more likely to be credited than are individuals, and occupants in flat organizational structures are assigned higher levels of blame and credit than are occupants in taller organizational structures.
64 citations
TL;DR: The problems associated with each insanity “test” presently in use are addressed and how “determining” insanity is an evolutionary process is addressed.
Abstract: Health care professionals are often called upon as expert witnesses in insanity determinations. Most are familiar with the “insanity standard” applicable in the court in which they are called to testify. It might be helpful to understand that not all jurisdictions apply the same standard and how the different standards are related. This article is intended to address the problems associated with each insanity “test” presently in use and how “determining” insanity is an evolutionary process.
6 citations