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Proceedings Paper

User Response Characteristics For Sequential Displays
Author(s): John R. Ims
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Paper Abstract

Visual responses to briefly presented sequential displays were studied in two experiments exploring stimulus contrast variation influences on target acquisition. When two stimuli are presented in close temporal and spatial proximity, the target stimulus (TS) information is changed by the flanking or surrounding mask stimulus (MS). The observers' visual response characteristics or TS information bandwidth varies in a non-monotonic U-shaped fashion as the temporal difference between TS and MS onset (stimulus onset asynchrony or SOA) increases (Type B masking). Experiment 1 varied only TS con-trast, Experiment 2 varied only MS contrast. Observer responses to TS shape and location in the visual field were measured as a function of SOA and stimulus contrast. Data were evaluated by estimating the maximum of the regression functions describing the empirical masking functions. For Experiment 1, as TS contrast decreased, the SOA of maximum shape masking also decreased. SOA for maximum location masking was lower than that for shape responses. Experiment 2 revealed an attenuation of the Type B shape masking function as MS contrast was reduced. Location masking was minimal. In conclusion, variation of user visual response characteristics may prove useful in optimizing information bandwidth during human/computer display dialogues.

Paper Details

Date Published: 28 July 1981
PDF: 8 pages
Proc. SPIE 0271, Advances in Display Technology II, (28 July 1981); doi: 10.1117/12.931760
Show Author Affiliations
John R. Ims, The Aerospace Corporation (United States)

Published in SPIE Proceedings Vol. 0271:
Advances in Display Technology II
John R. Parsons, Editor(s)

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