The line-in-object superiority effect in perception: It depends on where you fix your eyes and what is located at the point of fixation

Williams and Weisstein (1978) reported that briefly presented line elements could be more accurately discerned in three-dimensional, coherent contexts than when presented alone. A series of five studies investigated this effect. The first study demonstrated that the general assumption that three-dimensional and coherent contexts are necessary conditions for demonstrating a line-in-object superiority effect is in error, and a robust effect can be demonstrated with contexts lacking coherence and depth. The remaining studies focused on a potentially more important determinant of the line-in-object effect. Evidence is presented that whether a given context facilitates, impairs, or has no effect on line detection is determined by the location of the fixation point and the amount of line detail at the fixation point. Proposals outlining processes assumed to underlie this fixation-location effect are advanced.     

Competency to be executed: A therapeutic jurisprudence perspective

This Article analyzes the concept of competency to be executed. It examines the Supreme Court's 1986 decision in Ford v. Wainwright, discussing both its Eighth Amendment and procedural due process determinations. It then considers the standard that should be applied in determining competency in this context and the procedures that the states should utilize to insure a fair determination consistent with due process. The article then considers the perplexing problem of whether an incompetent death row prisoner may assert a constitutional or statutory right to refuse treatment designed to restore him to competency for execution, examining both the constitutional and therapeutic implications of involuntary treatment in this context.     

Subcortical Aphasia

We critically review the literature on subcortical aphasia, suggest that a number of traditional concepts regarding mechanisms of aphasia are inconsistent with now abundant data, and propose several new hypotheses. The absence of aphasia in 17 reported cases of dominant hemisphere striatocapsular infarction and the finding of nearly every conceivable pattern of language impairment in 33 different reported cases of striatocapsular infarction provide strong evidence against a major direct role of the basal ganglia in language and against disconnection or diaschisis as mechanisms of nonthalamic subcortical aphasia. However, detailed consideration of the vascular events leading to striatocapsular infarction strongly suggests that associated linguistic deficits are predominantly related to sustained cortical hypoperfusion and infarction not visible on structural imaging studies. Thalamic disconnection, as may occur with striatocapsular infarcts with extension to the temporal stem and putamenal hemorrhages, may also contribute to the language deficits in some patients. Review of the literature on thalamic infarction, in conjunction with previously unreported anatomic details of four cases, suggests that what infarcts in the tuberothalamic artery territory and the occasional infarcts in the paramedian artery territory associated with aphasia have in common is damage to the frontal lobe–inferior thalamic peduncle–nucleus reticularis–center median system that may be involved in regulating the thalamic gate in attentional processes. Disruption of attentional gating in the pulvinar and lateral posterior nuclei resulting from such lesions may impair selection of specific neuronal networks in the projection field of these nuclei that serve as the substrate for lexical–semantic function, which is in effect a disruption of a type of working memory, as defined by Goldman–Rakic. We define this as a defect of selective engagement.     

Complexity of ethical decision making in psychiatry

Psychiatric residents and psychiatrists have little difficulty in making judgments about a clinical course of action to take with patients. However, making ethical clinical decisions is more challenging, because psychiatric residents are usually provided little formal training in ethics. Further, many ethical dilemmas are complex, requiring knowledge of the psychiatric profession's ethics code, moral principles, law, and practice standards and of how they should be weighed in the decision-making process. The purpose of this article is to demonstrate this complexity in regard to the identification of potential ethical dilemmas, understanding the issues that these dilemmas raise, and formulating potential solutions to them. Two common but important areas of treatment in which ethical dilemmas arise (informed consent and competence of care) are used as examples for our presentation. The article demonstrates that to successfully engage in ethical analysis in psychiatry is impossible without substantial formal training in the process.     

Metaphysics and the vision of health

Whitehead's philosophy of organism provides the most comprehensive and adequate basis for the transformation of contemporary health care. In contrast to the reductionist and fragmentary medical models supported by Cartesian dualism, materialism, and idealism, Whitehead's metaphysics serves as the foundation for a holistic health care system, inclusive of the dimensions of spirituality, emotions, physical existence, and environment as they relate to health and illness. Whitehead's understanding of the relationship of mind and body and the role of the divine in the creative process encourages the inclusion of pastoral care, imaging, and meditation in responding to illness.     

Nomadic inhibition of attention and motor responses

Klein and MacInnes [Klein, R. M., & MacInnes, W. J. (1999). Inhibition of return is a foraging facilitator in visual search. Psychological Science, 10, 346-352] posited that the function of a phenomenon known as the inhibition of return (IOR) [Posner, M. I., & Cohen, Y. (1984). Components of visual orienting. In H. Bouma, & D. G. Bouwhuis (Eds.), Attention and performance X: Control of language processes (pp. 531-554). Hillsdale, NJ: Erlbaum] is to facilitate the foraging of food and objects in the environment. Once a target object has been identified either the location of that target in space or a movement to that target is inhibited in order to allow the performer to shift his/her attention to something new. Interestingly, in the majority of IOR studies, participants begin their search from a central home position. This research examined IOR in a nomadic target-target paradigm in which the home position randomly appeared at one of three target locations and attentional shifts/movements progressed to other locations. In Experiment 1, participants executed simple manual button presses in response to the sequential presentation of a home position and then two target stimuli. In Experiment 2, participants made manual-aiming movements in response to the same type of presentation. Results obtained from both experiments implicate perceptual-motor mechanisms over and above the inhibition of a specific target location or response. Inhibitory effects appear to be associated with both perceptual and motor processes, and depend not only on the temporal and spatial relations between potential targets, but also on the actions required to detect or engage the targets.