Visual search and dual tasks reveal two distinct attentional resources
type: Dataset
description: Most theories of visual processing assume that a target will "pop out" from an array of distractors ("parallel" visual search, e.g., color or orientation discrimination) if targets and distractors can be discriminated without attention. When the discrimination requires attention (e.g., rotated L vs. T or red-green vs. green-red bisected disks), "serial" examination is needed in visual search. Attentional requirements are also frequently assessed by measuring interference from a concurrently performed attentionally demanding task. It is commonly believed that attention acts equivalently in dual-task and visual search paradigms, based on the implicit assumption that visual attentional requirements can be defined along a single dimension. Here we show that there is no such equivalence: We report on targets that do not trigger pop-out, even though they can be discriminated from distractors with attention occupied elsewhere (natural scenes, color-orientation conjunctions); conversely, we show that certain targets that pop out among distractors need undivided attention to be effectively discriminated from distractors when presented in isolation (rotated L vs. +, depth-rotated cubes). In other words, visual search and dual-task performance reveal attentional resources along two independent dimensions. We suggest an interpretation of these results in terms of neuronal selectivities and receptive field size effects.
issued: 2026-05-21T12:19:05.961864
language: en
modified: 2026-05-21T12:19:05.961870
contact point: Organization
  fn: CCSD
keyword: attention
keyword: color-perception
keyword: discrimination-learning
keyword: humans
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: reaction-time
keyword: scconeurcognitive-scienceneuroscience
landing page: 0898-929X

Visual search and dual tasks reveal two distinct attentional resources
type: Distribution
format: HTML
issued: 2026-05-21T12:19:05.981690
modified: 2026-05-21T12:19:05.940034
access URL: https://hal.science/hal-00068903

test_moissonnage_selune
type: Agent