Document Detail

How one breaks Fitts's Law and gets away with it: Moving further and faster involves more efficient online control.
MedLine Citation:
PMID:  25485765     Owner:  NLM     Status:  Publisher    
Adam, Mol, Pratt, and Fischer (2006) reported what they termed "a violation of Fitts's Law" - when participants aimed to targets in an array, movement times (MTs) to the last target location (highest index of difficulty (ID)) were shorter than predicted by Fitts's Law. Based on the results of subsequent studies in which placeholders were present either during planning and/or execution stages of the movements, it was suggested that the violation may emerge because of context-dependent changes in planning processes. The present study examined this planning explanation by conducting detailed kinematic analyses of movements. Participants performed aiming movements to sets of 3 targets in different placeholder arrays with different movement amplitudes. Consistent with previous Fitts's Law violation findings, MTs were not significantly longer for movements to the last versus middle target location. Interestingly, the pattern of peak limb velocities (typically associated with planning processes) did not mirror the changes in MTs. On the other hand, analyses of the effector's spatial variability during the movement suggested greater involvement of online control processes when the target was in the last position. Based on these results, we suggest that the Fitts' Law violation observed here occurred because of more efficient online control processes.
Cheryl M Glazebrook; Dovin Kiernan; Timothy N Welsh; Luc Tremblay
Related Documents :
25406075 - Perception of social interactions for spatially scrambled biological motion.
25190405 - The role of creaky voice in cantonese tonal perception.
25284135 - An environment-adaptive management algorithm for hearing-support devices incorporating ...
25234905 - Dose-response relationships for the onset of avoidance of sonar by free-ranging killer ...
19640055 - The effect of altered auditory feedback on control of vocal production in budgerigars (...
16661255 - Light effects on the synthesis of ribulose-1,5-bisphosphate carboxylase in lemna gibba ...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-12-5
Journal Detail:
Title:  Human movement science     Volume:  39C     ISSN:  1872-7646     ISO Abbreviation:  Hum Mov Sci     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-12-8     Completed Date:  -     Revised Date:  2014-12-9    
Medline Journal Info:
Nlm Unique ID:  8300127     Medline TA:  Hum Mov Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  163-176     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier B.V. All rights reserved.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Inflammation of the frontal intersinus septal air cell as a cause of headaches.
Next Document:  Crossing the North Sea seems to make DCD disappear: Cross-validation of Movement Assessment Battery ...