On the Role of Top-down and Bottom-up Guidance in Conjunction Search: Singleton Interference Revisited

Overview

Journal Atten Percept Psychophys

Publisher Springer

Specialties Psychiatry
Psychology

Date 2023 Apr 5

PMID 37017865

Authors

Kevin Dent

Affiliations

Soon will be listed here.

Abstract

The current study reassessed the potential of salient singleton distractors to interfere in conjunction search. Experiment 1 investigated conjunctions of colour and orientation, using densely packed arrays that produced highly efficient search. The results demonstrated clear interference effects of singleton distractors in task-relevant dimensions colour and orientation, but no interference from those in a task-irrelevant dimension (motion). Goals exerted an influence in constraining this interference such that the singleton interference along one dimension was modulated by target relevance along the other task relevant dimension. Colour singleton interference was much stronger when the singleton shared the target orientation, and orientation interference was much stronger when the orientation singleton shared the target colour. Experiments 2 and 3 examined singleton-distractor interference in feature search. The results showed strong interference particularly from task-relevant dimensions but a reduced role for top-down, feature-based modulation of singleton interference, compared with conjunction search. The results are consistent with a model of conjunction search based on core elements of the guided search and dimension weighting approaches, whereby weighted dimensional feature contrast signals are combined with top-down feature guidance signals in a feature-independent map that serves to guide search.

Citing Articles

Madden D, Merenstein J, Mullin H, Jain S, Rudolph M, Cohen J Brain Struct Funct. 2024; 229(7):1533-1559.

PMID: 38856933 PMC: 11374505. DOI: 10.1007/s00429-024-02807-2.

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