Effects of absolute luminance and luminance contrast on visual search in low mesopic environments

Diverse adaptive visual processing mechanisms allow us to complete visual search tasks in a wide visual photopic range (>0.6 cd/m²). Whether search strategies or mechanisms known from this range extend below, in the mesopic and scotopic luminance spectra (<0.6 cd/m²), has yet to be addressed. Based on a study that addressed simple target discrimination in luminance environments using contrast-dependent behavioral efficiency functions, we assessed visual search in more complex-feature and conjunction-search paradigms. The results verify the previously reported deficiency windows defined by an interaction of base luminance and luminance contrast for more complex visual-search tasks. Based on significant regression analyses, a more precise definition of the magnitude of contribution of different contrast parameters. Characterized feature search patterns had approximately a 2.5:1 ratio of contribution from the Michelson contrast property relative to Weber contrast, whereas the ratio was approximately 1:1 in a serial-search condition. The results implicate near-complete magnocellular isolation in a visual-search paradigm that has yet to be demonstrated. Our analyses provide a new method of characterizing visual search and the first insight in its underlying mechanisms in luminance environments in the low mesopic and scotopic spectra.

     

Reading from the middle: Heidegger and the narrative self

Heidegger's Being and Time is an underappreciated venue for pursuing work on the role narrative plays in self‐understanding and self‐constitution, and existing work misses Heidegger's most interesting contribution. Implicit in his account of Dasein (an individual human person) is a notion of the narrative self more compelling than those now on offer. Bringing together an adaptive interpretation of Heidegger's notion of “thrown projection”, Wolfgang Iser's account of “the wandering viewpoint”, and more recent Anglo‐American work on the narrative self, I argue that we read our ongoing existences in the same way that, mid‐story, we read a narrative. Reading is a better master metaphor than authorship, narration, plot, or character to guide investigations of narrative's relation to the self. It is not merely a metaphor, however, as the hermeneutic structures involved in interpreting existence and a narrative from the middle are the same.     

Naturalist Political Realism and the First Political Question

Many political realists reject the idea that the first task for political philosophy is to justify the existence of coercive political institutions (CPIs). Instead, they say, we should begin with the factual existence of CPIs, and ask how they ought to be structured. In holding this view, they adopt a form of political naturalism that is broadly Aristotelian in character. In this article, I distinguish between two forms that this political naturalism might take ‐ what I call a ‘strong’ form, and a ‘weak’ form ‐ and argue that both ought to be rejected. 1     

A Phenomenological Inquiry of Identity Development,Same‐Sex Attraction,and Religious Upbringing

Growing up in religious/spiritual communities often creates identity issues for lesbian and gay individuals. In this phenomenological study, the authors investigated the experiences of 25 lesbian and gay individuals who self‐identified as having been raised within organized religious communities. Participants described that these communities were affirming, tolerant, or nonaffirming. Accordingly, emergent themes indicated that the current spiritual lives of participants varied greatly depending on their experiences of identity integration and affirmation. Implications for counselors and researchers are discussed.     

The classification of violence risk

The Classification of Violence Risk (COVR) is an interactive software program designed to estimate the risk that a person hospitalized for mental disorder will be violent to others. The software leads the evaluator through a chart review and a brief interview with the patient. At the end of this interview, the software generates a report that contains a statistically valid estimate of the patient's violence risk-ranging from a 1% to a 76% likelihood of violence-including the confidence interval for that estimate, and a list of the risk factors that the program took into account to produce the estimate. In this article, the development of the COVR software is described and several issues that arise in its administration are discussed.     

Yielding behavior of Israeli drivers: interaction of age and sex

The main objective of the present study was to explore the yielding behavior of Israeli drivers. A series of observations were carried out at a busy crosswalk during rush hour to determine the association between demographic factors, i.e., the sex and age of both pedestrians and drivers and the rate of compliance with yielding regulations. The rate of yielding observed did not exceed 53%. Drivers within the 26-50 age range, excluding other age groups, tended to exhibit a higher yielding rate towards the members of their own age group.