Comprehensive Review of Visual Attention, Search, and Awareness Theories

What is focused/selective attention?

The process of concentrating on one input while ignoring others.

What is divided attention?

The ability to process several inputs simultaneously.

What is change blindness?

The phenomenon where a change in a visual stimulus goes unnoticed.

What does the 'Spotlight' metaphor of attention refer to?

It describes attention as a beam that highlights information at a specific location.

What is visual search?

The process of locating a target among distractors, which can be parallel or sequential.

What is Feature-Integration Theory (FIT)?

A theory proposing that attention operates on locations in space to bind features of objects together.

What is Inhibition of Return (IOR)?

A phenomenon where attention is inhibited from returning to a previously attended location.

What did Posner and Cohen (1984) study regarding attention?

They studied spatial cueing and its effects on attention and response times.

What is negative priming?

A delay in response to a target due to prior exposure to a distractor.

What is the difference between location-based and object-based attention?

Location-based attention focuses on spatial locations, while object-based attention focuses on the objects themselves.

What is the significance of the 'Gorilla' study by Simmons and Chabris (1999)?

It illustrates how people can miss significant visual information when focused on a specific task.

What is the Attentional Blink effect?

A phenomenon where a second target cannot be detected when it appears close in time to the first target.

What are exogenous and endogenous attention?

Exogenous attention is stimulus-driven (bottom-up), while endogenous attention is goal-directed (top-down).

How does the Stroop Task relate to attention?

It demonstrates the conflict between automatic and controlled processes in attention.

What is the role of attention in awareness?

Attention acts as a gateway to awareness, determining what information is processed consciously.

What does biased competition theory propose?

It suggests that attention is a set of mechanisms for reducing many inputs to limited outcomes through competition.

What is the relationship between early and late selection models of attention?

Early selection models focus on location-based attention, while late selection models involve more in-depth processing of objects.

What is the significance of the visual search data in FIT?

It supports the idea that attention binds features of an object together based on their spatial locations.

What is the difference between pop-out effects and serial visual search?

Pop-out effects occur when a single feature attracts attention, while serial visual search requires sequential attention to locate a target.

What is the impact of negative priming on attention?

It shows that prior exposure to a distractor can hinder the processing of a subsequent target.

What does the term 'extinction' refer to in attention research?

It refers to the inability to perceive stimuli in one visual field due to attentional deficits.

How does attention facilitate spatial search?

By enhancing targets while suppressing distractors, making it easier to locate relevant information.

What is the role of episodic and semantic features in attention?

They must be bound together into an 'object file' for a stimulus to reach awareness.

What is the Attentional Blink (AB)?

An effect where a second target is missed if it follows a first target within ~500 milliseconds during rapid serial visual presentation.

Who conducted the foundational study on the Attentional Blink?

Raymond, Shapiro & Arnell in 1992.

What does the Global Workspace (GW) Theory propose?

It suggests that awareness is achieved when information is processed in a 'global workspace' that integrates both bottom-up and top-down processing.

How does the Global Workspace Theory explain the bottleneck in awareness?

It posits that perception is parallel while access to the global workspace is sequential, allowing only one entity to be processed at a time.

What happens to the second target (T2) during the Attentional Blink?

It may be delayed and likely overwritten or masked by subsequent distractors, resulting in it not reaching awareness.

What are the electrophysiological correlates of attention?

P1 and N1 components in ERPs show stronger responses contralateral to an attended stimulus.

What is the relationship between alpha power and attention?

Alpha power decreases when attending to a stimulus and increases for a suppressed stimulus.

What does a decrease in alpha power indicate?

It indicates that attention is being directed towards a stimulus.

What is the significance of the 'all-or-nothing' pattern in the Attentional Blink?

It reflects that T2 is either reported or not reported, indicating a clear distinction in awareness.

What are the early ERPs related to perception and attention?

P1 and N1 components, which are not modulated by reported visibility.

What does the N2 component in ERPs indicate?

It is related to categorization and shows a linear relationship with visibility.

What is the role of the P3a and P3b components in relation to awareness?

They show an 'all-or-nothing' relationship with visibility, indicating access to the global workspace.

What is the effect of semantic processing in blinked trials?

Semantic processing reflected by the N4 component is present to some degree even in unreported (blinked) trials.

What does the term 'Lag1 Sparing' refer to?

It refers to the phenomenon where the first target can be detected even when a second target follows closely in time.

What is the time frame for the attentional blink to occur?

Approximately within 500 milliseconds after the first target.

What is the predictive cue's role in the attentional blink experiment?

It precedes the target and helps in directing attention to the relevant stimulus.

What are the implications of the Attentional Blink for understanding consciousness?

It reveals limitations in the capacity of processing stimuli at the level of awareness.

How do visual search and negative priming relate to attention?

They provide insights into whether attention is location-based, object-based, or both.

What is the significance of the 'step' pattern in ERP findings?

It indicates a bimodal distribution related to the visibility of the second target during the attentional blink.

What is the relationship between working memory updates and the attentional blink?

Working memory updates show an 'all-or-nothing' pattern, indicating access to awareness.

What is the role of distractors in the attentional blink phenomenon?

Distractors can mask the second target, contributing to the likelihood of it being missed.

What does the term 'electrophysiological correlates of processing with and without awareness' refer to?

It refers to how different ERP amplitudes relate to the visibility of stimuli over time.

What does the term 'masking' refer to in the context of the attentional blink?

It refers to the process where subsequent stimuli obscure the perception of earlier targets.

What is the relationship between alpha amplitude and attended versus suppressed stimuli?

Alpha amplitude decreases for attended stimuli and increases for suppressed stimuli.

What are the two different representations of MEG/EEG data mentioned?

Evoked Responses and Time-Frequency Representation.

What is the primary focus of the Global Workspace Theory in relation to attention?

It emphasizes the integration of bottom-up and top-down processing for conscious awareness.

What is the impact of attention on ERPs related to stimuli?

Attention enhances certain ERP components, indicating stronger processing of attended stimuli.