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Visual Cognition

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https://www.readbyqxmd.com/read/27570471/selective-scanpath-repetition-during-memory-guided-visual-search
#1
Jordana S Wynn, Michael B Bone, Michelle C Dragan, Kari L Hoffman, Bradley R Buchsbaum, Jennifer D Ryan
Visual search efficiency improves with repetition of a search display, yet the mechanisms behind these processing gains remain unclear. According to Scanpath Theory, memory retrieval is mediated by repetition of the pattern of eye movements or "scanpath" elicited during stimulus encoding. Using this framework, we tested the prediction that scanpath recapitulation reflects relational memory guidance during repeated search events. Younger and older subjects were instructed to find changing targets within flickering naturalistic scenes...
January 2, 2016: Visual Cognition
https://www.readbyqxmd.com/read/27478399/dissociable-behavioural-outcomes-of-visual-statistical-learning
#2
Brett C Bays, Nicholas B Turk-Browne, Aaron R Seitz
Statistical learning refers to the extraction of probabilistic relationships between stimuli and is increasingly used as a method to understand learning processes. However, numerous cognitive processes are sensitive to the statistical relationships between stimuli and any one measure of learning may conflate these processes; to date little research has focused on differentiating these processes. To understand how multiple processes underlie statistical learning, here we compared, within the same study, operational measures of learning from different tasks that may be differentially sensitive to these processes...
2016: Visual Cognition
https://www.readbyqxmd.com/read/26924937/spatial-compatibility-interference-effects-a-double-dissociation-between-two-measures
#3
Alexander J Kirkham, Steven P Tipper
In spatial compatibility tasks, when the spatial location of a stimulus is irrelevant it nevertheless interferes when a response is required in a different spatial location. For example, response with a left key-press is slowed when the stimulus is presented to the right as compared to the left side of a computer screen. However, in some conditions this interference effect is not detected in reaction time (RT) measures. It is typically assumed that the lack of effect means the irrelevant spatial code was not analysed or that the information rapidly decayed before response...
September 14, 2015: Visual Cognition
https://www.readbyqxmd.com/read/26924936/from-gaze-cueing-to-perspective-taking-revisiting-the-claim-that-we-automatically-compute-where-or-what-other-people-are-looking-at
#4
Henryk Bukowski, Jari K Hietanen, Dana Samson
Two paradigms have shown that people automatically compute what or where another person is looking at. In the visual perspective-taking paradigm, participants judge how many objects they see; whereas, in the gaze cueing paradigm, participants identify a target. Unlike in the former task, in the latter task, the influence of what or where the other person is looking at is only observed when the other person is presented alone before the task-relevant objects. We show that this discrepancy across the two paradigms is not due to differences in visual settings (Experiment 1) or available time to extract the directional information (Experiment 2), but that it is caused by how attention is deployed in response to task instructions (Experiment 3)...
September 14, 2015: Visual Cognition
https://www.readbyqxmd.com/read/26681913/eye-movements-and-hazard-perception-in-active-and-passive-driving
#5
Andrew K Mackenzie, Julie M Harris
Differences in eye movement patterns are often found when comparing passive viewing paradigms to actively engaging in everyday tasks. Arguably, investigations into visuomotor control should therefore be most useful when conducted in settings that incorporate the intrinsic link between vision and action. We present a study that compares oculomotor behaviour and hazard reaction times across a simulated driving task and a comparable, but passive, video-based hazard perception task. We found that participants scanned the road less during the active driving task and fixated closer to the front of the vehicle...
July 3, 2015: Visual Cognition
https://www.readbyqxmd.com/read/26180506/reward-prospect-interacts-with-trial-by-trial-preparation-for-potential-distraction
#6
Francesco Marini, Berry van den Berg, Marty G Woldorff
When attending for impending visual stimuli, cognitive systems prepare to identify relevant information while ignoring irrelevant, potentially distracting input. Recent work (Marini et al., 2013) showed that a supramodal distracter-filtering mechanism is invoked in blocked designs involving expectation of possible distracter stimuli, although this entails a cost (distraction-filtering cost) on speeded performance when distracters are expected but not presented. Here we used an arrow-flanker task to study whether an analogous cost, potentially reflecting the recruitment of a specific distraction-filtering mechanism, occurs dynamically when potential distraction is cued trial-to-trial (cued distracter-expectation cost)...
February 1, 2015: Visual Cognition
https://www.readbyqxmd.com/read/27504073/when-does-feature-search-fail-to-protect-against-attentional-capture
#7
Tashina Graves, Howard E Egeth
When participants search for a shape (e.g., a circle) among a set of homogenous shapes (e.g., triangles) they are subject to distraction by color singletons that are more salient than the target. However, when participants search for a shape among heterogeneous shapes, the presence of a non-target color singleton does not slow responses to the target. Attempts have been made to explain these results from both bottom-up and top-down perspectives. What both accounts have in common is that they do not predict the occurrence of attentional capture on typical feature search displays...
2015: Visual Cognition
https://www.readbyqxmd.com/read/27398065/the-effects-of-age-and-set-size-on-the-fast-extraction-of-egocentric-distance
#8
Daniel A Gajewski, Courtney P Wallin, John W Philbeck
Angular direction is a source of information about the distance to floor-level objects that can be extracted from brief glimpses (near one's threshold for detection). Age and set size are two factors known to impact the viewing time needed to directionally localize an object, and these were posited to similarly govern the extraction of distance. The question here was whether viewing durations sufficient to support object detection (controlled for age and set size) would also be sufficient to support well-constrained judgments of distance...
2015: Visual Cognition
https://www.readbyqxmd.com/read/26500423/holistic-processing-in-the-composite-task-depends-on-face-size
#9
David A Ross, Isabel Gauthier
Holistic processing is a hallmark of face processing. There is evidence that holistic processing is strongest for faces at identification distance, 2 - 10 meters from the observer. However, this evidence is based on tasks that have been little used in the literature and that are indirect measures of holistic processing. We use the composite task- a well validated and frequently used paradigm - to measure the effect of viewing distance on holistic processing. In line with previous work, we find a congruency x alignment effect that is strongest for faces that are close (2m equivalent distance) than for faces that are further away (24m equivalent distance)...
2015: Visual Cognition
https://www.readbyqxmd.com/read/26190929/multiple-influences-of-reward-on-perception-and-attention
#10
Luiz Pessoa
Visual processing is influenced by stimulus-driven and goal-driven factors. Recent interest has centered on understanding how reward might provide additional contributions to visual perception and unraveling the underlying neural mechanisms. In this review, I suggest that the impact of reward on vision is not unitary and depends on the type of experimental manipulation. With this in mind, I outline a possible classification of the main paradigms employed in the literature and discuss potential brain processes that operate during some of the experimental manipulations described...
2015: Visual Cognition
https://www.readbyqxmd.com/read/26146477/valuable-orientations-capture-attention
#11
Patryk A Laurent, Michelle G Hall, Brian A Anderson, Steven Yantis
Visual attention has long been known to be drawn to stimuli that are physically salient or congruent with task-specific goals. Several recent studies have shown that attention is also captured by stimuli that are neither salient nor task-relevant, but that are rendered in a color that has previously been associated with reward. We investigated whether another feature dimension-orientation-can be associated with reward via learning and thereby elicit value-driven attentional capture. In a training phase, participants received a monetary reward for identifying the color of Gabor patches exhibiting one of two target orientations...
January 1, 2015: Visual Cognition
https://www.readbyqxmd.com/read/26069450/value-driven-attentional-capture-is-modulated-by-spatial-context
#12
Brian A Anderson
When stimuli are associated with reward outcome, their visual features acquire high attentional priority such that stimuli possessing those features involuntarily capture attention. Whether a particular feature is predictive of reward, however, will vary with a number of contextual factors. One such factor is spatial location: for example, red berries are likely to be found in low-lying bushes, whereas yellow bananas are likely to be found on treetops. In the present study, I explore whether the attentional priority afforded to reward-associated features is modulated by such location-based contingencies...
2015: Visual Cognition
https://www.readbyqxmd.com/read/26028984/visual-perceptual-learning-by-operant-conditioning-training-follows-rules-of-contingency
#13
Dongho Kim, Aaron R Seitz, Takeo Watanabe
Visual perceptual learning (VPL) can occur as a result of a repetitive stimulus-reward pairing in the absence of any task. This suggests that rules that guide Conditioning, such as stimulus-reward contingency (e.g. that stimulus predicts the likelihood of reward), may also guide the formation of VPL. To address this question, we trained subjects with an operant conditioning task in which there were contingencies between the response to one of three orientations and the presence of reward. Results showed that VPL only occurred for positive contingencies, but not for neutral or negative contingencies...
January 2015: Visual Cognition
https://www.readbyqxmd.com/read/25544827/the-representation-of-the-saccade-target-object-depends-on-visual-stability
#14
A Caglar Tas, Cathleen M Moore, Andrew Hollingworth
No abstract text is available yet for this article.
September 1, 2014: Visual Cognition
https://www.readbyqxmd.com/read/25317065/the-bandwidth-of-consolidation-into-visual-short-term-memory-vstm-depends-on-the-visual-feature
#15
James R Miller, Mark W Becker, Taosheng Liu
We investigated the nature of the bandwidth limit in the consolidation of visual information into visual short-term memory. In the first two experiments, we examined whether previous results showing differential consolidation bandwidth for color and orientation resulted from methodological differences by testing the consolidation of color information with methods used in prior orientation experiments. We briefly presented two color patches with masks, either sequentially or simultaneously, followed by a location cue indicating the target...
August 1, 2014: Visual Cognition
https://www.readbyqxmd.com/read/25729314/forgetting-induced-by-recognition-of-visual-images
#16
Ashleigh M Maxcey, Geoffrey F Woodman
Retrieval-induced forgetting is a phenomenon in which groups of stimuli are initially learned, but then a subset of those stimuli are subsequently remembered via retrieval practice, causing the forgetting of the other initially learned items. This phenomenon has almost exclusively been studied using linguistic stimuli. The goal of the present study was to determine whether our memory for simultaneously learned visual stimuli was subject to a similar type of memory impairment. Participants were shown real-world objects, then they practiced recognizing a subset of these remembered objects, and finally their memory was tested for all learned objects...
July 2014: Visual Cognition
https://www.readbyqxmd.com/read/25383014/statistical-extraction-affects-visually-guided-action
#17
Jennifer E Corbett, Joo-Hyun Song
The visual system summarizes average properties of ensembles of similar objects. We demonstrated an adaptation aftereffect of one such property, mean size, suggesting it is encoded along a single visual dimension (Corbett, et al., 2012), in a similar manner as basic stimulus properties like orientation and direction of motion. To further explore the fundamental nature of ensemble encoding, here we mapped the evolution of mean size adaptation over the course of visually guided grasping. Participants adapted to two sets of dots with different mean sizes...
July 1, 2014: Visual Cognition
https://www.readbyqxmd.com/read/26180505/are-summary-statistics-enough-evidence-for-the-importance-of-shape-in-guiding-visual-search
#18
Robert G Alexander, Joseph Schmidt, Gregory J Zelinsky
Peripheral vision outside the focus of attention may rely on summary statistics. We used a gaze-contingent paradigm to directly test this assumption by asking whether search performance differed between targets and statistically-matched visualizations of the same targets. Four-object search displays included one statistically-matched object that was replaced by an unaltered version of the object during the first eye movement. Targets were designated by previews, which were never altered. Two types of statistically-matched objects were tested: One that maintained global shape and one that did not...
April 1, 2014: Visual Cognition
https://www.readbyqxmd.com/read/24910515/word-frequency-in-fast-priming-evidence-for-immediate-cognitive-control-of-eye-movements-during-reading
#19
Daniel J Schad, Sarah Risse, Timothy Slattery, Keith Rayner
Numerous studies have demonstrated effects of word frequency on eye movements during reading, but the precise timing of this influence has remained unclear. The fast priming paradigm (Sereno & Rayner, 1992) was previously used to study influences of related versus unrelated primes on the target word. Here, we used this procedure to investigate whether the frequency of the prime word has a direct influence on eye movements during reading when the prime-target relation is not manipulated. We found that with average prime intervals of 32 ms readers made longer single fixation durations on the target word in the low than in the high frequency prime condition...
March 1, 2014: Visual Cognition
https://www.readbyqxmd.com/read/24771998/eye-tracking-research-and-technology-towards-objective-measurement-of-data-quality
#20
Eyal M Reingold
Two methods for objectively measuring eye tracking data quality are explored. The first method works by tricking the eye tracker to detect an abrupt change in the gaze position of an artificial eye that in actuality does not move. Such a device, referred to as an artificial saccade generator, is shown to be extremely useful for measuring the temporal accuracy and precision of eye tracking systems and for validating the latency to display change in gaze contingent display paradigms. The second method involves an artificial pupil that is mounted on a computer controlled moving platform...
March 2014: Visual Cognition
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