scholarly journals Eye movements during change detection: Implications for search constraints, memory limitations, and scanning strategies

2001 ◽  
Vol 63 (2) ◽  
pp. 209-225 ◽  
Author(s):  
Gregory J. Zelinsky
Keyword(s):  
Eye Movements ◽  
Change Detection ◽  
Scanning Strategies

scholarly journals LIP activity in the interstimulus interval of a change detection task biases the behavioral response

2015 ◽  
Vol 114 (5) ◽  
pp. 2637-2648 ◽  
Author(s):  
Fabrice Arcizet ◽  
Koorosh Mirpour ◽  
Daniel J. Foster ◽  
Caroline J. Charpentier ◽  
James W. Bisley
Keyword(s):  
Eye Movements ◽  
Change Detection ◽  
Behavioral Response ◽  
Interstimulus Interval ◽  
Detection Task ◽  
Covert Attention ◽  
Change Detection Task ◽  
Lateral Intraparietal Area ◽  
Overt Attention ◽  
The World

When looking around at the world, we can only attend to a limited number of locations. The lateral intraparietal area (LIP) is thought to play a role in guiding both covert attention and eye movements. In this study, we tested the involvement of LIP in both mechanisms with a change detection task. In the task, animals had to indicate whether an element changed during a blank in the trial by making a saccade to it. If no element changed, they had to maintain fixation. We examine how the animal's behavior is biased based on LIP activity prior to the presentation of the stimulus the animal must respond to. When the activity was high, the animal was more likely to make an eye movement toward the stimulus, even if there was no change; when the activity was low, the animal either had a slower reaction time or maintained fixation, even if a change occurred. We conclude that LIP activity is involved in both covert and overt attention, but when decisions about eye movements are to be made, this role takes precedence over guiding covert attention.

Eye movements and change detection

2011 ◽  
Author(s):  
James R. Brockmole ◽  
Michi Matsukura
Keyword(s):  
Eye Movements ◽  
Change Detection

scholarly journals Effects of search intent on eye-movement patterns in a change detection task

2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Sangil Lee ◽  
Minho Lee ◽  
Hyeonggyu Park ◽  
Mun-Seon Chang ◽  
Ho-Wan Kwak
Keyword(s):  
Eye Movements ◽  
Change Detection ◽  
Eye Movement ◽  
Function Analysis ◽  
Movement Patterns ◽  
Detection Task ◽  
Primary Task ◽  
Change Detection Task ◽  
Classification Rate ◽  
Movement Index

The goal of the present study was to examine whether intention type affects eye movement patterns in a change detection task In addition, we assessed whether the eye movement index could be used to identify human implicit intent. We attempted to generate three types of intent amongst the study participants, dividing them into one of three conditions; each condition received different information regarding an impending change to the visual stimuli. In the “navigational intent” condition, participants were asked to look for any interesting objects, and were not given any more information about the impending change. In the “low-specific intent” condition, participants were informed that a change would occur. In the “high-specific intent” condition, participants were told that a change would occur, and that an object would disappear. In addition to this main change detection task, participants also had to perform a primary task, in which they were required to name aloud the colors of objects in the pre-change scene. This allowed us to control for the visual searching process during the pre-change scene. The main results were as follows: firstly, the primary task successfully controlled for the visual search process during the pre-change scene, establishing that there were no differences in the patterns of eye movements across all three conditions despite differing intents. Secondly, we observed significantly different patterns of eye movement between the conditions in the post-change scene, suggesting that generating a specific intent for change detection yields a distinctive pattern of eye-movements. Finally, discriminant function analysis showed a reasonable classification rate for identifying a specific intent. Taken together, it was found that both participant intent and the specificity of information provided to the participants affect eye movements in a change detection task.

Normal Spatial Attention But Impaired Saccades and Visual Motion Perception After Lesions of the Monkey Cerebellum

2009 ◽  
Vol 102 (6) ◽  
pp. 3156-3168 ◽  
Author(s):  
A. Ignashchenkova ◽  
S. Dash ◽  
P. W. Dicke ◽  
T. Haarmeier ◽  
M. Glickstein ◽  
...  
Keyword(s):  
Eye Movements ◽  
Motor Learning ◽  
Change Detection ◽  
Motion Perception ◽  
Cognitive Deficit ◽  
Visual Motion ◽  
Saccadic Eye Movements ◽  
Luminance Change ◽  
Visual Motion Perception ◽  
Saccadic Dysmetria

Lesions of the cerebellum produce deficits in movement and motor learning. Saccadic dysmetria, for example, is caused by lesions of the posterior cerebellar vermis. Monkeys and patients with such lesions are unable to modify the amplitude of saccades. Some have suggested that the effects on eye movements might reflect a more global cognitive deficit caused by the cerebellar lesion. We tested that idea by studying the effects of vermis lesions on attention as well as saccadic eye movements, visual motion perception, and luminance change detection. Lesions in posterior vermis of four monkeys caused the known deficits in saccadic control. Attention tested by examination of acuity threshold changes induced by prior cueing of the location of the targets remained normal after vermis lesions. Luminance change detection was also unaffected by the lesions. In one case, after a lesion restricted to lobulus VIII, the animal had impaired visual motion perception.

Nonexplicit Change Detection in Complex Dynamic Settings

2012 ◽  
Vol 54 (6) ◽  
pp. 996-1007 ◽  
Author(s):  
François Vachon ◽  
Benoît R. Vallières ◽  
Dylan M. Jones ◽  
Sébastien Tremblay
Keyword(s):  
Eye Movements ◽  
Change Detection ◽  
Change Blindness ◽  
Complex Dynamic ◽  
Display Change ◽  
Attentional Processes ◽  
Assessment Task ◽  
Support Tools ◽  
Computer Controlled ◽  
And Control

Objective: We employed a computer-controlled command-and-control (C2) simulation and recorded eye movements to examine the extent and nature of the inability to detect critical changes in dynamic displays when change detection is implicit (i.e., requires no explicit report) to the operator’s task. Background: Change blindness—the failure to notice significant changes to a visual scene—may have dire consequences on performance in C2 and surveillance operations. Method: Participants performed a radar-based risk-assessment task involving multiple subtasks. Although participants were not required to explicitly report critical changes to the operational display, change detection was critical in informing decision making. Participants’ eye movements were used as an index of visual attention across the display. Results: Nonfixated (i.e., unattended) changes were more likely to be missed than were fixated (i.e., attended) changes, supporting the idea that focused attention is necessary for conscious change detection. The finding of significant pupil dilation for changes undetected but fixated suggests that attended changes can nonetheless be missed because of a failure of attentional processes. Conclusion: Change blindness in complex dynamic displays takes the form of failures in establishing task-appropriate patterns of attentional allocation. Application: These findings have implications in the design of change-detection support tools for dynamic displays and work procedure in C2 and surveillance.

Do You See What I See? Effects of Communication on Scanning Strategies in Change Detection by Individuals and Teams of Observers

2007 ◽  
Vol 51 (18) ◽  
pp. 1186-1190
Author(s):  
Camilla C. Knott ◽  
W. Todd Nelson ◽  
Megan K. McCroskey ◽  
Brent T. Miller
Keyword(s):  
Change Detection ◽  
Change Blindness ◽  
Command And Control ◽  
Movement Data ◽  
Path Analyses ◽  
High Workload ◽  
Military Command ◽  
Scanning Strategies ◽  
Time Accuracy ◽  
And Control

Change blindness results from the absence of attention from the source of a change. Unsurprisingly, change blindness worsens in dual task and high workload conditions. Such is the environment in which teams of operators in military command and control missions operate, yet little is known about change blindness susceptibility in these conditions. A flicker task required individuals and dyads to detect changes under high and low task difficulty. Reaction time, accuracy, and eye movements were examined. Scan path analyses showed that communicating dyads were more efficient at change detection than individuals and non-communicating dyads, but are just as blind to no change. Eye movement data also indicate differences in attention allocation and scan strategies among individuals, communicating, and non-communicating dyads. Implications for adaptive aids and tasks such as tactical command and control are discussed.

Eye movements and display change detection during reading.

2011 ◽  
Vol 37 (6) ◽  
pp. 1924-1938 ◽  
Author(s):  
Timothy J. Slattery ◽  
Bernhard Angele ◽  
Keith Rayner
Keyword(s):  
Eye Movements ◽  
Change Detection ◽  
Display Change
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