Search guidance is proportional to the categorical specificity of a target cue.
Visual search studies typically assume the availability of precise target information to guide search, often a picture of the exact target. However, search targets in the real world are often defined categorically and with varying degrees of visual specificity. In five target preview conditions we manipulated the availability of target visual information in a search task for common real-world objects. Previews were: a picture of the target, an abstract textual description of the target, a precise textual description, an abstract + colour textual description, or a precise + colour textual description. Guidance generally increased as information was added to the target preview. We conclude that the information used for search guidance need not be limited to a picture of the target. Although generally less precise, to the extent that visual information can be extracted from a target label and loaded into working memory, this information too can be used to guide search.
Schmidt
Joseph
J
Stony Brook University, Stony Brook, NY 11794-2500, USA.
Zelinsky
Gregory J
GJ
D000704:Analysis of Variance; D001288:Attention / Q000502:physiology*; D003463:Cues; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D008606:Mental Processes / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*