Irrelevant salient distractors can trigger early quitting in visual search, causing observers to miss targets they might otherwise find. Here, we asked whether task-relevant salient cues can produce a similar early quitting effect on the subset of trials where those cues fail to highlight the target. We presented participants with a difficult…

Introduction: It has been suggested that cognitive characteristics may affect search. This study investigated how decoding abilities, short-term memory capacity and rapid automatised naming skills relate to query formulation. Method: A total of twenty dyslexic participants and twenty non-dyslexic controls completed four standardised cognitive…

Eye movements were monitored to examine search efficiency and infer how color is mentally represented to guide search for multiple targets. Observers located a single color target very efficiently by fixating colors similar to the target. However, simultaneous search for 2 colors produced a dual-target cost. In addition, as the similarity between…

Mathematicians have proven that four colors are sufficient to color 2-D maps so that no neighboring regions share the same color. Here we consider the psychological 4-color problem: Identifying which 4 colors should be used to make a map easy to use. We build a model of visual search for this design task and demonstrate how to apply it to the task…

How does past experience influence visual search strategy (i.e., attentional set)? Recent reports have shown that, when given the option to use 1 of 2 attentional sets, observers persist with the set previously required in a training phase. Here, 2 related questions are addressed. First, does the training effect result only from perseveration with…

The authors report 4 experiments that examined color grouping and negative carryover effects in preview search via a probe detection task (J. J. Braithwaite, G. W. Humphreys, & J. Hodsoll, 2003). In Experiment 1, there was evidence of a negative color carryover from the preview to new items, using both search and probe detection measures. There…

Proposes an alternative real valued representation of color based on the information theoretic concept of entropy. A theoretical presentation of image entropy is accompanied by a practical description of the merits and limitations of image entropy compared to color histograms. Results suggest that image entropy is a promising approach to image…

Reviews color research and considers its implications for the design of instructional materials. Topics include physiological and psychological effects; color and learning, including attention, search tasks, retention and other objective measures, and non-objective measures; color and the cathode ray tube (CRT); and further research needs.…

Describes results from focus groups with Web users 10 to 13 years of age in Montreal that explored design criteria for Web portals. Discusses Ask Jeeves for Kids, KidsClick, Lycos Zone, and Yahooligans! and considers screen designs, color, graphics, animation, keyword search capabilities, browsable subject categories, and individual user…

Discusses reasons why K-12 school libraries should purchase multimedia CD-ROMs and reviews 4 interactive CD-ROM encyclopedias based on interface, search capabilities, printing and presentation, product support, and overall educational value. Provides example computer screens and a comparison of the reviewed CD-ROMs. (Author/JMV)