3,742 research outputs found
Auditory stimulus timing influences perceived duration of co-occurring visual stimuli
No full textThere is increasing interest in multisensory influences upon sensory-specific judgments, such as when auditory stimuli affect visual perception. Here we studied whether the duration of an auditory event can objectively affect the perceived duration of a co-occurring visual event. On each trial, participants were presented with a pair of successive flashes and had to judge whether the first or second was longer. Two beeps were presented with the flashes. The order of short and long stimuli could be the same across audition and vision (audio–visual congruent) or reversed, so that the longer flash was accompanied by the shorter beep and vice versa (audio–visual incongruent); or the two beeps could have the same duration as each other. Beeps and flashes could onset synchronously or asynchronously. In a further control experiment, the beep durations were much longer (tripled) than the flashes. Results showed that visual duration discrimination sensitivity (d′) was significantly higher for congruent (and significantly lower for incongruent) audio–visual synchronous combinations, relative to the visual-only presentation. This effect was abolished when auditory and visual stimuli were presented asynchronously, or when sound durations tripled those of flashes. We conclude that the temporal properties of co-occurring auditory stimuli influence the perceived duration of visual stimuli and that this can reflect genuine changes in visual sensitivity rather than mere response bias
Keynote: Jon Gertner
No full textThe symposium will start on the evening of April 16 with a keynote address by Jon Gertner. Jon is a journalist, historian, and feature writer for The New York Times Magazine
as well as the author of the NYTimes bestseller, The Idea Factory. His address will focus on the issue of intellectual property and the ethical questions around the huge amount of human-generated content that large language models use as they are developed
Jon Mirande eta ironia
No full textLa ironía es un elemento que ha ido siempre unido a la poesía, y especialmente a la poesía moderna.Tras un pequeño repaso a esta en diferentes épocas, se pasa a describir las tres diferentes ironías de Jon Mirande: la intelectual, la social y la filosófica. Todo ello acompañado de ejemplosIrony is an element that has always been united to poetry, and especially to modern poetry. After a small revision of irony in different eras, the author then describes the three different ironies of Jon Mirande: intellectual, social and philosophical irony. All this illustrated with example
Jon Pineda, 32nd Annual ODU Literary Festival
No full textJon Pineda is the author of The Translator\u27s Diary, winner of the Green Rose Prize for Poetry, and BIrthmark, winner of the Crab Orchard Award Series in Poetry Open Competition. His memoir, Sleep in Me, is forthcoming in 2010 from the University of Nebraska Press. He teaches in the low-residency MFA program at Queens University of Charlotte
2D but not 3D: pictorial-depth deficits in a case of visual agnosia
No full textPatients with visual agnosia exhibit acquired impairments in visual object recognition, that may or may not involve deficits in low-level perceptual abilities. Here we report a case (patient DM) who after head injury presented with object recognition deficits. He still appears able to extract 2D information from the visual world in a relatively intact manner; but his ability to extract pictorial information about 3D object-structure is greatly compromised. His copying of line drawings is relatively good, and he is accurate and shows apparently normal mental rotation when matching or judging objects tilted in the picture-plane. But he performs poorly on a variety of tasks requiring 3D representations to be derived from 2D stimuli, including: performing mental rotation in depth, rather than in the picture-plane; judging the relative depth of two regions depicted in line-drawings of objects; and deciding whether a line-drawing represents an object that is ‘impossible’ in 3D. Interestingly, DM failed to show several visual illusions experienced by normals (Muller-Lyer and Ponzo), that some authors have attributed to pictorial depth cues. Taken together, these findings indicate a deficit in achieving 3D intepretations of objects from 2D pictorial cues, that may contribute to object-recognition problems in agnosia
Interview with Jon Baskin--May 15, 2015
No full textJon Baskin is co-founder and editor of The Point magazine in Chicago. He is also a graduate student at the University of Chicago's Committee on Social Thought and the author of many essays and works of criticism for venues such as The Los Angeles Review of Books, The Nation, n+1, The New York Observer, BookForum, Salon, and The Point. Earlier in his career he was a fact checker for various magazines, including Popular Science, Inc Magazine, The Atlantic Monthly, and n+1. The interview was conducted at the office of The Point in Chicago on May 15, 2015.1_izzia9z
Jon Sands, 41st Annual ODU Literary Festival
No full textJon Sands is the author of The New Clean (2011), as well as the co-host of The Poetry Gods podcast. His work has been published widely, and anthologized in The Best American Poetry. He’s a youth mentor with Urban Word-NYC, and teaches creative writing for adults at Bailey House in East Harlem (an HIV/AIDS service center). He’s a recent MFA graduate in fiction from Brooklyn College, where his work won the Himan Brown Award for short stories, and he has represented New York City multiple times at the National Poetry Slam. He lives in Brookly
Rhythmic TMS over parietal cortex links distinct brain frequencies to global versus local visual processing
No full textNeural networks underlying visual perception exhibit oscillations at different frequencies (e.g., [1-6]). But how these map onto distinct aspects of visual perception remains elusive. Recent electroencephalography data indicate that theta or beta frequencies at parietal sensors increase in amplitude when conscious perception is dominated by global or local features, respectively, of a reversible visual stimulus [6]. But this provides only correlative, noninterventional evidence. Here we show via transcranial magnetic stimulation (TMS) interventions that short rhythmic bursts of right-parietal TMS at theta or beta frequency can causally benefit processing of global or local levels, respectively, for hierarchical visual stimuli, especially in the context of salient incongruent distractors. This double dissociation between theta and beta TMS reveals distinct causal roles for particular frequencies in processing global versus local visual feature
Grouping puts figure-ground assignment in context by constraining propagation of edge assignment.
No full textFigure-ground organization involves the assignment of edges to a figural shape on one or the other side of each dividing edge. Established visual cues for edge assignment primarily concern relatively local rather than contextual factors. In the present article, we show that an assignment for a locally unbiased edge can be affected by an assignment of a remote contextual edge that has its own locally biased assignment. We find that such propagation of edge assignment from the biased remote context occurs only when the biased and unbiased edges are grouped. This new principle, whereby grouping constrains the propagation of figural edge assignment, emerges from both subjective reports and an objective short-term edge-matching task. It generalizes from moving displays involving grouping by common fate and collinearity, to static displays with grouping by similarity of edge-contrast polarity, or apparent occlusion. Our results identify a new contextual influence on edge assignment. They also identify a new mechanistic relation between grouping and figure-ground processes, whereby grouping between remote elements can constrain the propagation of edge assignment between those elements. Supplemental materials for this article may be downloaded from http://app.psychonomic-journals.org/content/supplemental
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