Document Detail

Redundant leading and following zeros in comparative numerical judgment.
MedLine Citation:
PMID:  7567398     Owner:  NLM     Status:  MEDLINE    
The objective was to provide a more comprehensive understanding of how people make numerical comparative judgments when digits are contained in numbers with redundant leading or following zeros, e.g., 00080 and 800.000. These sequences of numbers often appear on computer display terminals (VDT) as line numbers, but surprisingly little research has been done on this. The experiment manipulated three aspects of numerical stimuli: (1) redundant leading zeros, (2) redundant following zeros, and (3) length of string of digits. The subjects were to push one of the two button-switches to respond whether two stimulus numbers shown on the computer screen were equal or unequal. The target stimuli contained several forms of redundant zeros, and each performance was assessed by response RT of the subjects. Analysis indicated five significant findings: (1) Redundant leading zeros hindered performance, (2) The effect of redundant following zeros depended on the stimulus type, (3) Over-all, longer digits took more processing time, (4) The RTs for the second-block trials were significantly faster than the first, and (5) Task performance was facilitated when the redundant zero representations were identical in both stimuli of a pair. Nonlexicographic processing seems to occur when feature identification can be used for numerical identification, that is, when the format is consistent. The research has implications for those in computer science to provide numerical formats which make comparative judgments as easy as possible.
S Takayanagi; N Cliff; P L Fidler
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Perceptual and motor skills     Volume:  80     ISSN:  0031-5125     ISO Abbreviation:  Percept Mot Skills     Publication Date:  1995 Jun 
Date Detail:
Created Date:  1995-11-13     Completed Date:  1995-11-13     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0401131     Medline TA:  Percept Mot Skills     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  819-29     Citation Subset:  IM    
Department of Psychology, University of Southern California, Los Angeles 90089-1061, USA.
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MeSH Terms
Data Display*
Problem Solving*
Reaction Time

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