What is conjunctive visual search?
In a visual search experiment, this time can be called the search time. Searching for a specific combination of two stimulus features (such as an upside and orange T) is called conjunctive search. In a conjunctive search, you look for the combination, that is the conjunction of two features.
What is conjunction search in psychology?
Conjunction search (also known as inefficient or serial search) is a visual search process that focuses on identifying a previously requested target surrounded by distractors possessing no distinct features from the target itself.
Which is an example of conjunction search?
In conjunction searches, participants must consider at least two features. For example, a conjunction search would be finding a red X in an array of blue X’s and red T’s, meaning that the conjunction of two features (shape and color) is required to isolate the target.
What is conjunction feature search?
Feature searches require identification of a pop-out target, defined by a single feature (e.g., search for the only square among a display of circles) while conjunction searches require identification of a target defined by a combination of two features (e.g., search for a yellow square among red and yellow circles and …
What’s an example of selective attention?
Here are some everyday examples of selective attention: Listening to your favorite podcast while driving to work. Having a conversation with a friend in a crowded place. Reading your book on a public transport bus.
What is pop out psychology?
The pop-out effect (also known as pop-out phenomenon) occurs when a visual stimulus that is comprised of differing components has mostly similar looking objects but one differing object that ‘pops-out’ or stands out very noticeably from the other objects in the visual field.
How does pop out effect visual perception?
What is the visual search paradigm?
Attention is a central topic in psychology and visual search is both a versatile paradigm for the study of visual attention and a topic of study in itself. Visual search depends on sensory, perceptual, and cognitive processes. As a result, the search paradigm has been used to investigate a diverse range of phenomena.
What is a visual search experiment?
Visual search experiments are designed to investigate detection of a target in the presence of multiple non-target elements, known variously as distractors or reference elements.
Why is visual search important?
Visual search, a vital task for humans and animals, has also become a common and important tool for studying many topics central to active vision and cognition ranging from spatial vision, attention, and oculomotor control to memory, decision making, and rewards.
What are the 3 types of attention?
Focused Attention: Refers to our ability to focus attention on a stimulus. Sustained Attention: The ability to attend to a stimulus or activity over a long period of time. Selective Attention: The ability to attend to a specific stimulus or activity in the presence of other distracting stimuli.
When to use conjunction search in visual search?
Visual search – Conjunction search. Conjunction Search occurs when a single feature search is insufficient in a visual search task. In a conjunction search each item in the visual array must be examined to determine if it is the target stimulus. The number of distracters can greatly increase the search time in a conjunction search.
What do you look for in a conjunctive search?
Searching for a specific combination of two stimulus features (such as an upside and orange T) is called conjunctive search. In a conjunctive search, you look for the combination, that is the conjunction of two features. Conjunctive search is more time consuming than search for one feature.
Why are the reaction times of conjunction searches different?
A popular explanation for the different reaction times of feature and conjunction searches is the feature integration theory (FIT), introduced by Treisman and Gelade in 1980. This theory proposes that certain visual features are registered early, automatically, and are coded rapidly in parallel across the visual field using preattentive processes.
How does the efficiency of conjunction search affect accuracy?
The efficiency of conjunction search in regards to reaction time (RT) and accuracy is dependent on the distractor-ratio and the number of distractors present. As the distractors represent the differing individual features of the target more equally amongst themselves (distractor-ratio effect), reaction time (RT) increases and accuracy decreases.