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ReferencesNavigation arrowAuthorsNavigation arrowThomas F. Callaghan
May 23

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Thomas F. Callaghan

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Publications by Thomas F. Callaghan (bibliography)

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1991
 
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Callaghan, Thomas F. (1991): Differences in Execution Times of Chords on the Ternary Chord Keyboard. In: Proceedings of the Human Factors Society 35th Annual Meeting 1991. pp. 857-861.

“In a preliminary study, response times of 64 possible Ternary Chord Keyboard (TCK) chords were compared in order to establish a basis for assigning symbols to chords. It was found that subjects had faster response times for some chords than for others. Upon review, it appeared that the way in which the chords were cued caused part of the differences in response time, which had been expected to depend only on key movement time differences. The present study was designed to examine the hypotheses that chord cueing caused part of the difference in chord response times, and also the hypotheses that there were definite movement time differences between chords in the preliminary study. This was done in the framework of Sternberg's Additive Factors Method. The results suggest that the cueing used in the preliminary study was not responsible for the differences in chord response times. They also support the argument that differences in chord movement times were not present. Therefore, if the measure of chord execution times is based on movement time alone, the technique used in the preliminary study do not provide a true measure. Also, the results imply that differences in chord response times might occur within mental processing.”

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26 Feb 2010: Modified
26 Jun 2007: Added

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May 23

“ Knowledge is commonly socially constructed, through collaborative efforts towards shared objectives or by dialogues and challenges brought about by different persons' perspectives. ”

-- G. Salomon (in "Distributed Cognitions: Psychological and Educational Considerations")

 
 

Featured chapter

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

Read Steve's chapter !

 
 

Help us help you!

 
 
 
 
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