Measuring search efficiency in complex visual search tasks: Global and local clutter.

2010 ◽  
Vol 16 (3) ◽  
pp. 238-250 ◽  
Author(s):  
Melissa R. Beck ◽  
Maura C. Lohrenz ◽  
J. Gregory Trafton
Keyword(s):  
Visual Search ◽  
Search Efficiency ◽  
Search Tasks ◽  
Global And Local

scholarly journals Centre-of-Gravity Fixations in Visual Search: When Looking at Nothing Helps to Find Something

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Dustin Venini ◽  
Roger W. Remington ◽  
Gernot Horstmann ◽  
Stefanie I. Becker
Keyword(s):  
Visual Search ◽  
Information Gain ◽  
Higher Order ◽  
Search Efficiency ◽  
Centre Of Gravity ◽  
Search Tasks ◽  
Multiple Item ◽  
Efficient Processing ◽  
Abstract Stimuli

In visual search, some fixations are made between stimuli on empty regions, commonly referred to as “centre-of-gravity” fixations (henceforth: COG fixations). Previous studies have shown that observers with task expertise show more COG fixations than novices. This led to the view that COG fixations reflect simultaneous encoding of multiple stimuli, allowing more efficient processing of task-related items. The present study tested whether COG fixations also aid performance in visual search tasks with unfamiliar and abstract stimuli. Moreover, to provide evidence for the multiple-item processing view, we analysed the effects of COG fixations on the number and dwell times of stimulus fixations. The results showed that (1) search efficiency increased with increasing COG fixations even in search for unfamiliar stimuli and in the absence of special higher-order skills, (2) COG fixations reliably reduced the number of stimulus fixations and their dwell times, indicating processing of multiple distractors, and (3) the proportion of COG fixations was dynamically adapted to potential information gain of COG locations. A second experiment showed that COG fixations are diminished when stimulus positions unpredictably vary across trials. Together, the results support the multiple-item processing view, which has important implications for current theories of visual search.

In Search of Experience Effects: How TSA Officers Differ From Undergraduates on Visual Search Tasks

2012 ◽  
Author(s):  
Stephen R. Mitroff ◽  
Adam T. Biggs ◽  
Matthew S. Cain ◽  
Elise F. Darling ◽  
Kait Clark ◽  
...  
Keyword(s):  
Visual Search ◽  
Search Tasks ◽  
Experience Effects

Do aging displays impact observer performance and visual search efficiency?

2007 ◽  
Author(s):  
Elizabeth A. Krupinski ◽  
Hans Roehrig ◽  
Jiahua Fan
Keyword(s):  
Visual Search ◽  
Observer Performance ◽  
Search Efficiency

Differences in visual search tasks between congenitally deaf and normally hearing adults

1998 ◽  
Vol 6 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Philippe Stivalet ◽  
Yvan Moreno ◽  
Joëlle Richard ◽  
Pierre-Alain Barraud ◽  
Christian Raphel
Keyword(s):  
Visual Search ◽  
Search Tasks
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