Search: onr:"swepub:oai:DiVA.org:umu-63091" >
Preparation for gra...
-
von Hofsten, Claes¨Psykologiska institutionen, Uppsala universitet
(author)
Preparation for grasping an object: A developmental study.
- Article/chapterEnglish1988
Publisher, publication year, extent ...
Numbers
-
LIBRIS-ID:oai:DiVA.org:umu-63091
-
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-63091URI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
An optoelectronic technique (SELSPOT) was used to monitor the opening and closing of the hand during reaching actions by measuring the change in the distance between thumb and index finger. Exp 1 established an adult criterion for the development. Adults started closing the hand around the target well before touch, and the timing was dependent on the size of the target. The hand started to close earlier when grasping a small rather than a large target. In addition, the degree of hand opening was also less for a small than for a large target. In Exp 2, infants who were 5–6, 9, and 13 months of age also controlled their grasping actions visually and started closing the hand around the target in anticipation of the encounter rather than as a reaction to the encounter. The strategy of the two younger age groups was different from that of adults. They started closing the hand closer to the time of contact with the target than did the 13-month-olds, who were comparable to adults in this respect. In all age groups, reaching and grasping were most commonly organized in a continuous way; the hand started to close without any interruption in the approach. The opening of the hand was adjusted to target size in the 9- and 13-month-olds but not in the 5–6 month olds.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Rönnqvist, LouiseUmeå universitet,Institutionen för psykologi(Swepub:umu)loro0001
(author)
-
¨Psykologiska institutionen, Uppsala universitetInstitutionen för psykologi
(creator_code:org_t)
Related titles
-
In:Journal of Experimental Psychology14:4, s. 610-6210096-15231939-1277
Internet link
Find in a library
To the university's database