One visual search, many memory searches: An eye-tracking investigation of hybrid search.

08:00 EDT 1st September 2017 | BioPortfolio

Summary of "One visual search, many memory searches: An eye-tracking investigation of hybrid search."

Suppose you go to the supermarket with a shopping list of 10 items held in memory. Your shopping expedition can be seen as a combination of visual search and memory search. This is known as "hybrid search." There is a growing interest in understanding how hybrid search tasks are accomplished. We used eye tracking to examine how manipulating the number of possible targets (the memory set size [MSS]) changes how observers (Os) search. We found that dwell time on each distractor increased with MSS, suggesting a memory search was being executed each time a new distractor was fixated. Meanwhile, although the rate of refixation increased with MSS, it was not nearly enough to suggest a strategy that involves repeatedly searching visual space for subgroups of the target set. These data provide a clear demonstration that hybrid search tasks are carried out via a "one visual search, many memory searches" heuristic in which Os examine items in the visual array once with a very low rate of refixations. For each item selected, Os activate a memory search that produces logarithmic response time increases with increased MSS. Furthermore, the percentage of distractors fixated was strongly modulated by the
More items in the MSS led to a higher percentage of fixated distractors. Searching for more potential targets appears to significantly alter how Os approach the task, ultimately resulting in more eye movements and longer response times.


Journal Details

This article was published in the following journal.

Name: Journal of vision
ISSN: 1534-7362
Pages: 5


DeepDyve research library

PubMed Articles [12339 Associated PubMed Articles listed on BioPortfolio]

More than a memory: Confirmatory visual search is not caused by remembering a visual feature.

Previous research has demonstrated a preference for positive over negative information in visual search; asking whether a target object is green biases search towards green objects, even when this ent...

To search or to like: Mapping fixations to differentiate two forms of incidental scene memory.

We employed eye-tracking to investigate how performing different tasks on scenes (e.g., intentionally memorizing them, searching for an object, evaluating aesthetic preference) can affect eye movement...

Localization and Elimination of Attentional Dysfunction in Schizophrenia During Visual Search.

Theories of the locus of visual selective attention dysfunction in schizophrenia propose that the deficits arise from either an inability to maintain working memory representations that guide attentio...

Memory as Perception of the Past: Compressed Time inMind and Brain.

In the visual system retinal space is compressed such that acuity decreases further from the fovea. Different forms of memory may rely on a compressed representation of time, manifested as decreased a...

Getting the most out of on-line literature searches Tips for advanced searches.

Thorough and efficient literature searches are important to authors and practicing physicians alike, and modern search engines have many tools to expedite the process. In databases such as PubMed, new...

Clinical Trials [4401 Associated Clinical Trials listed on BioPortfolio]

Google Health Search Trial

There are large differences in knowledge between patients and healthcare providers (i.e. physicians, physician assistants and nurse practitioners), and there is a strong interest on the pa...

Visuospatial Attention, Eye Movements and Instrumental Activities of Daily Living (IADLs) in Alzheimer's Disease

The aim is to understand which components of attentional deployment and selection are impaired in AD during searching in realistic scenes on a computer screen (Experiment 1) and in a natur...

Cognitive Training in Patients With MCI Using fMRI

The current project aims to investigate the efficacy of the visual imaging training (VIT) and alphabet search training in comparison to an active control intervention, namely psychoeducati...

Visual Perception Exploration Using Eye-tracking Technology in a Cannot Intubate/Cannot Oxygenate Simulation

Using eye-tracking technology, the aim of this observational study is to compare the visual interests between attending physicians and residents watching a Cannot Intubate/Cannot Oxygenate...

Memory and Attention in Healthy Children

This project studies memory and attention in healthy children aged from 5 to 17 years. The processes investigated are short term memory (auditory and visual) and attention. To characteriz...

Medical and Biotech [MESH] Definitions

Screening techniques first developed in yeast to identify genes encoding interacting proteins. Variations are used to evaluate interplay between proteins and other molecules. Two-hybrid techniques refer to analysis for protein-protein interactions, one-hybrid for DNA-protein interactions, three-hybrid interactions for RNA-protein interactions or ligand-based interactions. Reverse n-hybrid techniques refer to analysis for mutations or other small molecules that dissociate known interactions.

Type of declarative memory, consisting of personal memory in contrast to general knowledge.

Neurological process involving the conversion of learned information into long-term memory.

Complex mental function having four distinct phases: (1) memorizing or learning, (2) retention, (3) recall, and (4) recognition. Clinically, it is usually subdivided into immediate, recent, and remote memory.

Temporary visual deficit or impaired visual processing occurring in a rapid serial visual presentation task. After a person identifies the first of two visual targets, the ability to detect the second target is impaired for the next few hundred milliseconds. This phenomenon is called attentional blink.

Quick Search


DeepDyve research library

Relevant Topic

A diagnostic test is any kind of medical test performed to aid in the diagnosis or detection of disease. For example: to diagnose diseases to measure the progress or recovery from disease to confirm that a person is free from disease Clin...

Searches Linking to this Article