Citation

Scharoun SM, Robinson LE, Logan SW, Bryden PJ, Brock SJ, Fischman MG. Hum. Mov. Sci. 2018; 57: 244-250.

Affiliation

School of Kinesiology, Auburn University, United States.

Copyright

(Copyright © 2018, Elsevier Publishing)

DOI

10.1016/j.humov.2017.09.001

PMID

28985971

Abstract

There has been recent interest in the developmental trajectory of the end-state comfort effect (ESCE) in young children. However, potential sex differences have yet to be examined in the overturned glass task. We examined the ESCE using this task in a large sample (N=232) of typically-developing elementary school children (111 girls, 121 boys) in grades 1-5 (approximately 7-11years old). We sought to determine whether there were similarities or differences in performance between boys and girls. Children picked up an overturned drinking glass from a table, turned the glass upright, and then poured water into it from a measuring cup. Three trials were performed, and the use of an initial awkward thumb-down grip to pick up the glass was taken as evidence for the ESCE. There were non-significant main effects for sex and grade, but a significant interaction between factors. Boys increased in sensitivity to end-state comfort across the five grades while girls showed a decrease from grades 1-3, followed by an increase between grades 3 and 5. Taken together, the results indicate the presence of adult-like motor planning for the overturned glass task by the 4th grade (i.e., age 10), but also suggest the presence of a motor reorganization in girls, at around the 2nd or 3rd grade (i.e., 8 or 9years of age).

Copyright © 2017 Elsevier B.V. All rights reserved.

Language: en

Keywords

Action planning; Grip selection; Motor development