Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 2 of 2
Full-Text Articles in Kinesiology
The 2d:4d Ratio, Handedness, And Sex Across The Age Span, Helen A M Protopapas Ms.
The 2d:4d Ratio, Handedness, And Sex Across The Age Span, Helen A M Protopapas Ms.
Theses and Dissertations (Comprehensive)
The ratio of the difference between the 2nd and 4th digits of the hand (2D:4D ratio) has been demonstrated to be an indirect indicator of prenatal testosterone levels. Prenatal testosterone has been found to play a role in brain development in utero, and thus may influence lateral asymmetries, such as handedness. Consequently, one of the aims of the current study was to examine relationships between the 2D:4D ratio, hand preference, and hand performance with the factors of sex (males and females), handedness (right handers and left handers), and age considered. A total of 104 participants were tested, 90 right handers …
Laterality Across The Lifespan: The Effects Of Task Complexity, Nicole Williams
Laterality Across The Lifespan: The Effects Of Task Complexity, Nicole Williams
Theses and Dissertations (Comprehensive)
The current study aimed to build on the work of Gooderham & Bryden (2013) by comparing the effects of task complexity on hand selection across the lifespan. It was hypothesized that the increasing complexity of a task would override a biomechanically efficient movement such that participants would use only the preferred hand to complete the task. It was also hypothesized that older adults would perform similarly to young children with respect to switch points in space. Four age groups of participants (3-7 year olds, 8-12 year olds, 18-25 year olds and adults over 70 years) completed the newly designed Hand …