Selection criteria for preparatory object rotation in manual lifting actions

Lillian Y. Chang, Roberta L. Klatzky, and Nancy Pollard
Journal of Motor Behavior, Vol. 42, No. 1, January, 2010, pp. 11 - 27.


Download
  • Adobe portable document format (pdf) (255KB)
Copyright notice: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.

Abstract
Participants lifted a canister by its handle while balancing a ball on the lid. Experiment 1 allowed object rotation prior to lifting. A lifting comfort zone was measured by the variability in object orientation at lift; its size depended on the object mass and required task precision. The amount of pre-lift rotation correlated with the resulting change in lifting capability, as measured for different object orientations. Experiment 2 required direct grasping, without preparatory rotation. Task completion time and success rate decreased, and initial object orientation affected pre-lift time. Results suggest that lifting from the comfort zone produces more robust performance at a cost of slower completion; moreover, physical rotation could be replaced by mental planning when direct grasping is enforced.

Keywords
preparatory manipulation, object rotation, lifting capability, alternative movement strategies

Notes
Associated Center(s) / Consortia: Center for the Foundations of Robotics
Associated Lab(s) / Group(s): Computer Graphics Lab
Number of pages: 17
Note: This is a preprint of an article whose final and definitive form has been published in the Journal of Motor Behavior, available online at: http://heldref.metapress.com/openurl.asp?genre=article&id=doi:10.1080/00222890903269195

Text Reference
Lillian Y. Chang, Roberta L. Klatzky, and Nancy Pollard, "Selection criteria for preparatory object rotation in manual lifting actions," Journal of Motor Behavior, Vol. 42, No. 1, January, 2010, pp. 11 - 27.

BibTeX Reference
@article{Chang_2010_6397,
   author = "Lillian Y. Chang and Roberta L. Klatzky and Nancy Pollard",
   title = "Selection criteria for preparatory object rotation in manual lifting actions",
   journal = "Journal of Motor Behavior",
   pages = "11 - 27",
   month = "January",
   year = "2010",
   volume = "42",
   number = "1",
   Notes = "This is a preprint of an article whose final and definitive form has been published in the Journal of Motor Behavior, available online at: http://heldref.metapress.com/openurl.asp?genre=article&id=doi:10.1080/00222890903269195"
}