scholarly journals Linking physiology with behaviour: Functional specialisation of the visual field is reflected in gaze patterns during visual search

2009 ◽  
Vol 49 (2) ◽  
pp. 237-248 ◽  
Author(s):  
Tobias Pflugshaupt ◽  
Roman von Wartburg ◽  
Pascal Wurtz ◽  
Silvia Chaves ◽  
Anouk Déruaz ◽  
...  
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Gaze Patterns

scholarly journals Effect of Visual Field Constriction on Visual Search in Orderly Array and Random Array Cancellation Tasks

Psychology ◽  
2015 ◽  
Vol 06 (14) ◽  
pp. 1873-1878 ◽  
Author(s):  
Ryotaro Saito ◽  
Yoshifumi Ikeda ◽  
Hideyuki Okuzumi ◽  
Iwao Kobayashi ◽  
Mitsuru Kokubun
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Random Array ◽  
Visual Field Constriction

scholarly journals Visual field loss, eye movements and visual search

2010 ◽  
Vol 9 (8) ◽  
pp. 1210-1210
Author(s):  
L. McIlreavy ◽  
J. Fiser ◽  
P. Bex
Keyword(s):  
Visual Search ◽  
Eye Movements ◽  
Visual Field ◽  
Visual Field Loss

Auditory Spatial Cueing in Visual Search Tasks: Effects of Amplitude, Contrast and Duration

1995 ◽  
Vol 39 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Thomas Z. Strybel ◽  
Jan M. Boucher ◽  
Greg E. Fujawa ◽  
Craig S. Volp
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Peripheral Visual Field ◽  
Search Performance ◽  
Spatial Cues ◽  
Spatial Cueing ◽  
Search Tasks ◽  
Auditory Spatial Cues

The effectiveness of auditory spatial cues in visual search performance was examined in three experiments. Auditory spatial cues are more effective than abrupt visual onsets when the target appears in the peripheral visual field or when the contrast of the target is degraded. The duration of the auditory spatial cue did not affect search performance.

scholarly journals Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search

2012 ◽  
Vol 3 ◽  
Author(s):  
Emily Wiecek ◽  
Louis R. Pasquale ◽  
Jozsef Fiser ◽  
Steven Dakin ◽  
Peter J. Bex
Keyword(s):  
Visual Search ◽  
Eye Movements ◽  
Visual Field ◽  
Visual Field Loss ◽  
Peripheral Visual Field

Effect of Peripheral Visual Field Size upon Visual Search in Children and Adults

Perception ◽  
1980 ◽  
Vol 9 (4) ◽  
pp. 451-455 ◽  
Author(s):  
Naoyuki Osaka
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Power Function ◽  
Age Groups ◽  
Field Size ◽  
Peripheral Visual Field ◽  
Cube Root ◽  
Age Related

Twenty observers in each of the age groups, three, four, five, and twenty-one years, were asked to identify pictures displayed through five different sizes of peephole. Recognition latency changed as a cube-root power function of aperture area. It was found that latency decreased as age and area increased. However, the exponent of the power function showed little age-related change. Effectiveness of the peripheral visual field size was discussed in terms of magnitude of the exponent.

scholarly journals Object-based Selection of Irrelevant Features Is Not Confined to the Attended Object

2011 ◽  
Vol 23 (9) ◽  
pp. 2231-2239 ◽  
Author(s):  
Carsten N. Boehler ◽  
Mircea A. Schoenfeld ◽  
Hans-Jochen Heinze ◽  
Jens-Max Hopf
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Target Object ◽  
Neural Processing ◽  
Irrelevant Feature ◽  
Distractor Object ◽  
Object Based ◽  
Irrelevant Color ◽  
Task Irrelevant ◽  
Selection Of

Attention to one feature of an object can bias the processing of unattended features of that object. Here we demonstrate with ERPs in visual search that this object-based bias for an irrelevant feature also appears in an unattended object when it shares that feature with the target object. Specifically, we show that the ERP response elicited by a distractor object in one visual field is modulated as a function of whether a task-irrelevant color of that distractor is also present in the target object that is presented in the opposite visual field. Importantly, we find this modulation to arise with a delay of approximately 80 msec relative to the N2pc—a component of the ERP response that reflects the focusing of attention onto the target. In a second experiment, we demonstrate that this modulation reflects enhanced neural processing in the unattended object. These observations together facilitate the surprising conclusion that the object-based selection of irrelevant features is spatially global even after attention has selected the target object.

Serial and Parallel Search in Pattern Vision?

Perception ◽  
1987 ◽  
Vol 16 (3) ◽  
pp. 389-398 ◽  
Author(s):  
Scott B Steinman
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Reaction Times ◽  
Positional Information ◽  
Human Vision ◽  
The Other ◽  
Parallel Search ◽  
Lateral Separation ◽  
Serial Search ◽  
Initial Results

The nature of the processing of combinations of stimulus dimensions in human vision has recently been investigated. A study is reported in which visual search for suprathreshold positional information—vernier offsets, stereoscopic disparity, lateral separation, and orientation—was examined. The initial results showed that reaction times for visual search for conjunctions of stereoscopic disparity and either vernier offsets or orientation were independent of the number of distracting stimuli displayed, suggesting that disparity was searched in parallel with vernier offsets or orientation. Conversely, reaction times for detection of conjunctions of vernier offsets and orientation, or lateral separation and each of the other positional judgements, were related linearly to the number of distractors, suggesting serial search. However, practice has a significant effect upon the results, indicative of a shift in the mode of search from serial to parallel for all conjunctions tested as well as for single features. This suggests a reinter-pretation of these and perhaps other studies that use the Treisman visual search paradigm, in terms of perceptual segregation of the visual field by disparity, motion, color, and pattern features such as colinearity, orientation, lateral separation, or size.

scholarly journals Saccadic Scanpath Length: An Index for Human Threat Conditioning

2020 ◽  
Author(s):  
Yanfang Xia ◽  
Filip Melinscak ◽  
Dominik R Bach
Keyword(s):  
Visual Search ◽  
Time Window ◽  
Summary Statistic ◽  
Conditioning Paradigm ◽  
Gaze Patterns ◽  
Skin Conductance Responses ◽  
Full Screen ◽  
Scan Speed ◽  
Fourth Experiment ◽  
Speed Response

Threat-conditioned cues are thought to capture overt attention in a bottom-up process. Quantification of this phenomenon typically relies on cue competition paradigms. Here, we sought to exploit gaze patterns during exclusive presentation of a visual conditioned stimulus, in order to quantify human threat conditioning. To this end, we capitalised on a summary statistic of visual search during CS presentation, scanpath length. During a simple delayed threat conditioning paradigm with full-screen monochrome conditioned stimuli (CS), we observed shorter scanpath length during CS+ compared to CS- presentation. Retrodictive validity, i.e. effect size to distinguish CS+ and CS-, was maximised by considering a 2-s time window before US onset. Taking into account the shape of the scan speed response resulted in similar retrodictive validity. The mechanism underlying shorter scanpath length appeared to be longer fixation duration and more fixation on the screen center during CS+ relative to CS- presentation. These findings were replicated in a second experiment with similar setup, and further confirmed in a third experiment using full-screen patterns as CS. This experiment included an extinction session during which scanpath differences appeared to extinguish. In a fourth experiment with auditory CS and instruction to fixate screen centre, no scanpath length differences were observed. In conclusion, our study suggests scanpath length as a visual search summary statistic, which may be used as complementary measure to quantify threat conditioning with retrodictive validity similar to that of skin conductance responses.

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