scholarly journals Detection and identification of words and letters in simulated visual search of word lists

1975 ◽  
Vol 3 (2) ◽  
pp. 175-182 ◽  
Author(s):  
Ira Fischled
Keyword(s):  
Visual Search ◽  
Detection And Identification ◽  
Word Lists

Effect of Attention on the Detection and Identification of Masked Spatial Patterns

Perception ◽  
10.1068/p5276 ◽  
2005 ◽  
Vol 34 (3) ◽  
pp. 305-318 ◽  
Author(s):  
Endel Põder
Keyword(s):  
Visual Search ◽  
Spatial Patterns ◽  
Signal Detection Theory ◽  
Detection Task ◽  
Small Target ◽  
Crowding Effect ◽  
Identification Task ◽  
Set Size ◽  
Detection And Identification ◽  
Search Experiment

The effect of attention on the detection and identification of vertically and horizontally oriented Gabor patterns in the condition of simultaneous masking with obliquely oriented Gabors was studied. Attention was manipulated by varying the set size in a visual-search experiment. In the first experiment, small target Gabors were presented on the background of larger masking Gabors. In the detection task, the effect of set size was as predicted by unlimited-capacity signal detection theory. In the orientation identification task, increasing the set size from 1 to 8 resulted in a much larger decline in performance. The results of the additional experiments suggest that attention can reduce the crowding effect of maskers.

Visual Search: Detection, Identification, and Localization

Perception ◽  
1992 ◽  
Vol 21 (6) ◽  
pp. 765-777 ◽  
Author(s):  
Marc Green
Keyword(s):  
Visual Search ◽  
Target Detection ◽  
Detection And Identification ◽  
Display Performance ◽  
The Right ◽  
Detection And Localization

In two studies, observers searched for a single oblique target in a field of vertical distractors. In one experiment, target detection and identification (left versus right tilt) were compared. In another experiment, detection and localization were compared for the left versus the right half of the display. Performance on all three tasks was virtually identical: if a target could be detected, it could also be identified and localized. A review of previous studies generally supports the conclusion that performance on the three tasks is similar. This argues against current search theories, which rest heavily on data showing differences in identification and localization.

scholarly journals PSYCHOPHYSIOLOGICAL FEATURES OF AIRСRAFT PILOTS DURING VISUAL SEARCH AND DETECTION OF SMALL-SIZE GROUND OBJECTS IN DIFFICULT WEATHER CONDITIONS

2021 ◽  
Vol 13 (4) ◽  
pp. 87-99
Author(s):  
Konstantin Ivanovich Zasyadko ◽  
Sergei Konstantinovich Soldatov ◽  
Aleksei Valerievich Bogomolov ◽  
Aleksandr Pavlovich Vonarshenko ◽  
Mikhail Nikolaevich Yazlyuk
Keyword(s):  
Visual Search ◽  
Emotional Stress ◽  
Weather Conditions ◽  
Subjective Assessment ◽  
Flight Altitude ◽  
Lower Edge ◽  
Recording Equipment ◽  
Activity Increase ◽  
Detection And Identification ◽  
Aircraft Pilots

Background. Visual search and detection of small-size ground objects in difficult weather conditions is a task that provokes psychophysiological stress. The influence of professional pilot activity on the psychophysiological cost of air reconnaissance remains unclear. Materials and methods. The study on the detection and identification of a ground object during landing approach was carried out in winter, during daylight hours: 42 aircraft pilots (average age 30.0 ± 2.8 years, experience from 7 to 14 years) performed 192 research flights. Studies of the subjective assessment of the range to small-size ground objects (SSGO) depending on different visibility conditions and flight altitude were carried out with the participation of 11 aircraft pilots (average age 31.2 ± 1.4 years, experience from 10 to 14 years). The aircraft pilots performed 33 research flights, during which the indicators of neuro-emotional stress were recorded using on-board recording equipment. Results. The search for SSGO in difficult weather conditions (DWC) is accompanied by the increased neuro-emotional stress of the pilot. The pilot's eye estimate of the range to SSGO in conditions of a limited maximum visibility (2.5–4.0 km) for altitudes of 300–400 m is characterized by overestimating the range by an average of 12 %, while good visibility results in underestimating the range. A flight under the clouds with maintaining the distance between the lower edge of the cloud and a flight height of about 50 meters is more favorable for the search for SSGO. With a decrease in this distance to 25 m or less, there is an increase in the physiological cost of such activity (increase in heart rate by 11.6 %; respiration rate by 13.7 %). Conclusion. The psychophysiological features of a pilot that affect the detection and identification of SSGO in DWC mostly depend on the maximum visibility. The coefficients obtained make it possible to adequately estimate the detection and identification range during air reconnaissance in DWC. Pilot’s workload, as well as the level of his/her neuro-emotional stress are determined by the maximum visibility and the distance between the lower edge of the cloud and the specified flight altitude.

Impact of the Visual Appearance of Words on Visual Search Within Word Lists

2008 ◽  
Author(s):  
Laure Leger ◽  
Jean-Francois Rouet ◽  
Christine Ros ◽  
Nicolas Vibert
Keyword(s):  
Visual Search ◽  
Visual Appearance ◽  
Word Lists

scholarly journals Eye movements in the visual search of word lists

2002 ◽  
Vol 42 (12) ◽  
pp. 1499-1512 ◽  
Author(s):  
Helena Ojanpää ◽  
Risto Näsänen ◽  
Ilpo Kojo
Keyword(s):  
Visual Search ◽  
Eye Movements ◽  
Word Lists

Identification of hepatitis a virus in cell cultures by solid phase immune electron microscopy

1986 ◽  
Vol 44 ◽  
pp. 238-239
Author(s):  
C.D. Humphrey ◽  
T.L. Cromeans ◽  
E.H. Cook ◽  
D.W. Bradley
Keyword(s):  
Electron Microscopy ◽  
Liquid Phase ◽  
Cell Cultures ◽  
Rapid Detection ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Solid Phase ◽  
Immune Electron Microscopy ◽  
Detection And Identification

There is a variety of methods available for the rapid detection and identification of viruses by electron microscopy as described in several reviews. The predominant techniques are classified as direct electron microscopy (DEM), immune electron microscopy (IEM), liquid phase immune electron microscopy (LPIEM) and solid phase immune electron microscopy (SPIEM). Each technique has inherent strengths and weaknesses. However, in recent years, the most progress for identifying viruses has been realized by the utilization of SPIEM.

115: Detection and Identification of Bacterial DNA and HIV Gag in the Semen of HIV Infected Men

2004 ◽  
Vol 171 (4S) ◽  
pp. 30-30
Author(s):  
Robert C. Eyre ◽  
Ann A. Kiessling ◽  
Thomas E. Mullen ◽  
Rachel L. Kiessling
Keyword(s):  
Bacterial Dna ◽  
Detection And Identification
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