Asymmetries in Visual Search for Conjunctive Targets

Asher Cohen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Asymmetry is demonstrated between conjunctive targets in visual search with no detectable asymmetries between the individual features that compose these targets. Experiment 1 demonstrates this phenomenon for targets composed of color and shape. Experiment 2 and 4 demonstrate this asymmetry for targets composed of size and orientation and for targets composed of contrast level and orientation, respectively. Experiment 3 demonstrates that search rate of individual features cannot predict search rate for conjunctive targets. These results demonstrate the need for 2 levels of representations: one of features and one of conjunction of features. A model related to the modified feature integration theory is proposed to account for these results. The proposed model and other models of visual search are discussed.

Original languageAmerican English
Pages (from-to)775-797
Number of pages23
JournalJournal of Experimental Psychology: Human Perception and Performance
Issue number4
StatePublished - Aug 1993
Externally publishedYes


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