No abstract

Performance using four different levels of speech entry was compared to manual entry using a keyboard. Twenty subjects entered text as individual words, phrases, and characters using both orthographic and phonetic alphabets. Overall, when text is entered as words or phrases, performance is equivalent to using a keyboard for individuals who are able to type reasonably well. Spelling text character by character produces approximately seven times as many errors and requires significantly more time to enter information. Use of a phonetic alphabet improves performance but is not as efficient as phrase and word entry.

No abstract

This report sumnarizes a review of human factors research on VDTs. The main areas of interest included workstation design, character and display design, work organization, lighting and reflectance, and visual discomfort. Experimental studies were critically reviewed for the soundness of their methodologies and conclusions. In many of the studies, there were problems of interpreting the results due t o careless oversights on the part of the researcher(s), for example, the inappropriate selection of subjects or lack of a control group. Due t o different subject selection strategies and different VDT parameters, the integration and generalization of research results i s difficult.

No abstract