Half valid colour highlighting and visual search in menu options
Introduction Highlighting menu options is usually regarded as effectively improving search performance. Recent evidence has suggested that the effect of highlighting cannot be conceptualized in such a uniform way. When highlighting is valid only in 50% of the search trials (half valid highlighting), a paradoxical relationship is
360 G. Philipsen
found: performance degrades under certain modes of target highlighting, but it does not with use of colour (Tan and Fisher, 1987; Fisher and Tan, 1989).