MEASURES OF THE DISCRIMINABILITY OF SYMBOL SHAPES

PDF

Authors
  1. McFadden, S.M.
  2. Bauer, B.
  3. McManus, K.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The increase in the complexity of computer-based graphical information systems has resulted in a requirement for lrage symbol sets. To ensure that decisions are made with speed and accuracy, it is important for the symbols in such systems to be discriminated consistently and reliably. Studies on symbol discrimination usually find that discrimination is a function of the number and kinds of dimensions along which the symbols vary. However, the critical dimensions often vary from study to study. Some of this variability could be due to the wide range of conditions and methodologies used across studies. If this is the case, it is important to understand how different conditions and tasks influence the perceptibility and discriminability of symbols. The study reported in this paper addressed this problem. It compared the characteristics used in assessing the similarities of a set of symbols in a rting task with those used in picking out symbols in a visual search task. The former task is similar to the process used by a designer in selecting symbols while the latter is an important component of the actual tasks that an user carries out in locating information on a display. Participants rated the similarity of ten geometric shapes using apaired-comparison task. TRUNCATED
Keywords
Shape coding;Visual search;Multidimensioanl scaling;Paired comparisons
Report Number
DCIEM-97-R-61 — Technical Report
Date of publication
01 Dec 1997
Number of Pages
40
DSTKIM No
98-00522
CANDIS No
506966
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: