Preliminary Investigation on the Utility of Saturation and Brightness as Redundant and Non-Redundant Codes with Hue in Tactical Displays.

摘要

Two experiments were conducted to assess the relative benefits of redundantly and non-redundantly combining the stimulus dimensions of saturation and brightness with hue in symbolic visual displays. Previous research has indicated that both saturation and brightness may be related to hue in such a way that a facilitation in search performance might be realized if these dimensions were combined in a tactical display symbology. Subjects completed extensive visual research paradigms on cathode ray tube based tactical displays. In experiment 1, three hues (red, blue, and yellow) and three saturation levels (most, middle, and least saturated) were varied, while symbol shape was held constant. The stimulus combinations of hue and saturation were combined in redundant and non-redundant conditions, which enabled the quantification of the integrality and separability of the hue and saturation dimensions. The analysis of the search reaction times and the number of correct responses revealed a significant interference effect when the stimulus dimensions were combined in a non-redundant manner and the subjects were forced to search for targets of a specific saturation level.