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Detlef Rhenius

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Publications by Detlef Rhenius (bibliography)

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1990
 
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Deffner, Gerhard, Snyder, Harry L., Bittner, Jr. Alvah C., Fisher, Carolanne, Rhenius, Detlef and Sanderson, Penelope (1990): Verbal Protocols as a Research Tool in Human Factors. In: D., Woods, and E., Roth, (eds.) Proceedings of the Human Factors Society 34th Annual Meeting 1990, Santa Monica, USA. pp. 1145-1147.

Verbal protocols have been used for many years in different research contexts, but there still is no clear consensus about the validity of the technique and methods for maximizing validity in an applied setting; how to standardize the collection and analysis of protocols; and last but certainly not least, whether the resulting data is worth the effort. This panel discussion is a companion to a symposium at this conference which presents empirical studies and human factors applications of verbal protocol techniques. The panel will focus in more depth on issues raised in that earlier session, with the goal of providing guidance for practical applications of the technique.

© All rights reserved Deffner et al. and/or Human Factors Society

 
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Rhenius, Detlef and Deffner, Gerhard (1990): Evaluation of Concurrent Thinking Aloud Using Eye-Tracking Data. In: D., Woods, and E., Roth, (eds.) Proceedings of the Human Factors Society 34th Annual Meeting 1990, Santa Monica, USA. pp. 1265-1269.

In a series of studies we address the two questions of: 1) Do verbalizations reflect concurrent thought, and 2) Does concurrent thinking aloud differ from normal thinking? The design of experimental tests was based upon Ericsson and Simon's model of thinking aloud, incorporating variation of how information is represented in short term memory. Eye-movement recordings were used as a source of additional data, allowing us to go beyond a mere analysis of solution time and accuracy. Comparing verbalizations and eye-movement data, we arrived at a positive answer to the first of our initial questions. The second question was approached on several levels, always involving a comparison of 'think-aloud groups' with silent controls. We found no differences with respect to accuracy, but longer solution times in think-aloud groups. In a final experiment, the influence of thinking aloud on concurrent task performance could be narrowed down to an effect which only persists through the early stages of familiarization with tasks. We conclude that concurrent verbalization is a viable tool in the study of cognitive processes.

© All rights reserved Rhenius and Deffner and/or Human Factors Society

 
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Changes to this page (author)

25 Feb 2010: Modified
26 Jun 2007: Added
26 Jun 2007: Added

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May 26

The theory gives the answers, not the theorist.

-- Allen Newell

 
 

Featured chapter

Read the fascinating history of Wearable Computing, told by its father, Steve Mann

Read Steve's chapter !

 
 

Help us help you!