When looking at a scene, observers feel that they see its entire structure in great detail and can immediately notice any changes in it. However, when brief blank fields are placed between alternating displays of an original and a modified scene, a striking failure of perception is induced: identification of changes becomes extremely difficult, even when changes are large and made repeatedly. Identification is much faster when a verbal cue is provided, showing that poor visibility is not the cause of (...) this difficulty. Identification is also faster for objects mentioned in brief verbal descriptions of the scene. These results support the idea that observers never form a complete, detailed representation of their surroundings. In addition, results also indicate that attention is required to perceive change, and that in the absence of localized motion signals it is guided on the basis of high-level interest. (shrink)

Observers inspected normal, high quality color displays of everyday visual scenes while their eye movements were recorded. A large display change occurred each time an eye blink occurred. Display changes could either involve "Central Interest" or "Marginal Interest" locations, as determined from descriptions obtained from independent judges in a prior pilot experiment. Visual salience, as determined by luminance, color, and position of the Central and Marginal interest changes were equalized. -/- The results obtained were very similar to those obtained in (...) prior experiments showing failure to detect changes occurring simultaneously with saccades, flicker, or “mudsplashes” in the visual scene: Many changes were very hard to detect, and Marginal Interest changes were harder to detect than Central Interest changes. -/- Analysis of eye movements showed, as expected, that the probability of detecting a change depended on the eye’s distance from the change location. However a surprising finding was that both for Central and Marginal Interest changes, evenwhen observers were directly fixating the change locations (within 1 degree),more than 40% of the time they still failed to see the changes. It seems that looking at something does not guarantee you “ see” it. (shrink)

Change-blindness occurs when large changes are missed under natural viewing conditions because they occur simultaneously with a brief visual disruption, perhaps caused by an eye movement, a flicker, a blink, or a camera cut in a film sequence. We have found that this can occur even when the disruption does not cover or obscure the changes. When a few small, high-contrast shapes are briefly spattered over a picture, like mudsplashes on a car windscreen, large changes can be made simultaneously in (...) the scene without being noticed. (shrink)

When brief blank fields are placed between alternating displays of an original and a modified scene, a striking failure of perception is induced: the changes become extremely difficult to notice, even when they are large, presented repeatedly, and the observer expects them to occur (Rensink, O'Regan, & Clark, 1997). To determine the mechanisms behind this induced "change blindness", four experiments examine its dependence on initial preview and on the nature of the interruptions used. Results support the proposal that representations at (...) the early stages of visual processing are highly volatile, and that focused attention is needed to stabilize them sufficiently to support the perception of change. (shrink)

It has been acknowledged on numerous occasions that personal religiousness is a potential source of ethical norms, and consequently, an influence in ethical evaluations. An extensive literature review provides little in the way of empirical investigation of this recognized affect. This investigation conceptualizes religiousness as a motivation for ethical action, and discovers significant differences in ethical judgements among respondents categorized by personal religious motivation. Suggestions as to the source of these differences, and the implications which they offer to managers are (...) discussed and supported from the literature. (shrink)

We argue that any theory of color physicalism must include consideration of ecological interactions. Ecological and sensorimotor contingencies resulting from relative surface motion and observer motion give rise to measurable effects on the spectrum of light reflecting from surfaces. These contingencies define invariant manifolds in a sensory-spatial space, which is the physical underpinning of all subjective color experiences.

Findlay & Walker's target article questions whether covert attention plays any role in normal visual scanning (overt attention). My commentary suggests that there is indeed a very close link between the processes that govern covert and overt attention.

This paper provides a statistical survey of the incidence of elision at the penthemimeral caesura in the iambic trimeters of Greek tragedy. It updates and builds on the work of Descroix by considering the rates of elision of different types of words: lexicals, nonlexical polysyllables, and nonlexical monosyllables. While all tragedians elide less at the caesura than throughout the line, in Aeschylus the rate of this reduction is far greater for lexicals and polysyllabic nonlexicals than it is for monosyllabic nonlexicals. (...) On this evidence, and the evidence of interlinear elision, it is tentatively suggested that lexicals and nonlexical polysyllables should together be considered as the more constrained elisions. When the rates of constrained elision are examined, the difference between Aeschylus and later Euripides is revealed to be twice that obtained when bulk figures are used. This difference is attributed to a combination of Euripides’ adoption of more fluent phrasing towards the end of his career and the tragedians’ different approaches to compositional constraints. (shrink)

Ceci et al. draw conclusions that are inaccurate, analyze and report results inappropriately, fail to translate their scale into policy-relevant terms, and draw overly strong conclusions from their single study. They also attribute all the ills of academic appointments to tenure, and ignore problems with other aspects of the system. Their conclusion that tenure is not supported is at best premature. (Published Online February 8 2007).

Confusing modern poetry with philosophy is a common fault of literary criticism. Yet, the work of some poets can benefit critically from philosophical interpretations. Wallace Stevens is a poet who manifested an abiding interest in philosophy. His poems consistently display, in both their syntax and modulation of thought, philosophical parallels. Stevens’ dominant mode of thought is phenomenological. This can be shown by analyzing parallels between phenomenological methodology and Stevens’ poetry. Particularly three poems---“Thirteen Ways of Looking at a Blackbird” (1917), “The (...) Snow Man” (1921), and “The Latest Freed Man” (1938)---embody, respectively, the poem as doing phenomenology, the poem as a description of the phenomenological mind, and the poem as a portrait of the phenomenologist. (shrink)

Confusing modern poetry with philosophy is a common fault of literary criticism. Yet, the work of some poets can benefit critically from philosophical interpretations. Wallace Stevens is a poet who manifested an abiding interest in philosophy. His poems consistently display, in both their syntax and modulation of thought, philosophical parallels. Stevens’ dominant mode of thought is phenomenological. This can be shown by analyzing parallels between phenomenological methodology and Stevens’ poetry. Particularly three poems---“Thirteen Ways of Looking at a Blackbird” (1917), “The (...) Snow Man” (1921), and “The Latest Freed Man” (1938)---embody, respectively, the poem as doing phenomenology, the poem as a description of the phenomenological mind, and the poem as a portrait of the phenomenologist. (shrink)