This thesis work is mainly focused on two problems related to improving accessibility of information graphics for visually impaired users. The first problem is automated analysis of information graphics for information extraction and the second problem is multi-modal representations for accessibility. Information graphics are graphical…

Mixed lists of digit pairs and consonant pairs were presented under Sternberg's scanning paradigm. The results indicated that the subjects partitioned this material into discriminable subsets but apparently only used that structure to reduce response latency when the test probes were negative. Probe familiarity is discussed as a basis for this…

Subjects responded to pairs of test items from learned linear orderings (e.g., Tom is taller than Dick; Dick is taller than Sam, etc.). Results are compared with previous studies of ordered linguistic, perceptual, and numerical information. (Editor/RK)