No description available.

No description available.

This project investigates the development of asymmetry throughout growth by using bilateral asymmetry of the humerus as a proxy for handedness. A large skeletal sample of non-adults combined with a smaller sample of adults, primarily from British archaeological sites, was examined in order to detect when handedness appears in the human skeleton. Traditional measurements were combined with 3D data in order to provide a comprehensive picture of bilateral asymmetry. Results of this work indicate a striking trend from left to right-handedness during growth and development, with infants and toddlers exhibiting left-sided asymmetry and older children and adolescents demonstrating right-sidedness. Interestingly, this trend is consistent with what has been observed behaviourally in children, suggesting that biomechanical forces strongly influence bilateral asymmetry in the upper limb bones. In addition to examining handedness throughout growth, this research also explores bilateral asymmetry more generally as it is impossible to fully understand handedness without observing how asymmetry varies according to different factors. Although this work supports the hypothesis that all human populations are right-handed, there are subtle differences between groups. Results indicate that British populations became more asymmetrical over time, with this becoming most pronounced during the Industrial Revolution. Differences in degree of asymmetry between males and females was also noted, suggesting differences in activity between the two groups, as well as supporting the notion that the male and female skeleton differ in how they respond to biomechanical forces. Overall, this work provides a comprehensive analysis and discussion of how handedness presents in the human skeleton.

This project investigates the development of asymmetry throughout growth by using bilateral asymmetry of the humerus as a proxy for handedness. A large skeletal sample of non-adults combined with a smaller sample of adults, primarily from British archaeological sites, was examined in order to detect when handedness appears in the human skeleton. Traditional measurements were combined with 3D data in order to provide a comprehensive picture of bilateral asymmetry. Results of this work indicate a striking trend from left to right-handedness during growth and development, with infants and toddlers exhibiting left-sided asymmetry and older children and adolescents demonstrating right-sidedness. Interestingly, this trend is consistent with what has been observed behaviourally in children, suggesting that biomechanical forces strongly influence bilateral asymmetry in the upper limb bones. In addition to examining handedness throughout growth, this research also explores bilateral asymmetry more generally as it is impossible to fully understand handedness without observing how asymmetry varies according to different factors. Although this work supports the hypothesis that all human populations are right-handed, there are subtle differences between groups. Results indicate that British populations became more asymmetrical over time, with this becoming most pronounced during the Industrial Revolution. Differences in degree of asymmetry between males and females was also noted, suggesting differences in activity between the two groups, as well as supporting the notion that the male and female skeleton differ in how they respond to biomechanical forces. Overall, this work provides a comprehensive analysis and discussion of how handedness presents in the human skeleton.

No description available.

Thesis (M.A.)--University of Toledo, 2007. / Typescript. "Submitted as partial fulfillment of the requirements for the Master of Arts in Psychology." "A thesis entitled"--at head of title. Bibliography: leaves 20-22.

Thesis (Ph. D.)--Columbia University, 1929. / Vita. Published also as Teachers college, Columbia university, Contributions to education, no. 360. Bibliography: p. 81-84.

Issued also as Thesis (PH. D.) Chicago University, 1933. / Half-title: Study no. 2, Committee on child development, University of Chicago. Planographed.

Thesis (Ph. D.)--Columbia University, 1929. / Vita. Published also as Teachers college, Columbia university, Contributions to education, no. 360. Bibliography: p. 81-84.

This experiment was based upon earlier research involving beginning musicians' perception of how handedness interferes with their performance of melodic instruments, (VanAlstine, 2006) and the analysis of earlier studies by Laeng and Park (1999) involving the impact of handedness in playing the piano traditionally and in a "reversed" fashion. This study was conducted involving the performance of musical examples on the recorder where the subjects played in a traditional manner, as well as with reversed hand position. Laeng and Park found left-handed beginning and experienced musician's grouped subjects performed better upon a reversed keyboard than performing upon a traditional keyboard, Laeng and Park (1999). VanAlstine hypothesized that beginning musicians would play more correct notes with their dominant hand when playing the melodic examples, whereas advanced students would show less specialization when performing the musical examples with either hand. There were 60 subjects total, 30 beginning players from Carterville Intermediate School and 30 advanced players from the southern Illinois area, including the Southern Illinois University Carbondale School of Music. Subjects were given an Edinburgh-styled handedness test to identify them as either left- or right-handed performers. The subjects were further divided into groups of 15 beginning left-handed players, 15 beginning right-handed players, 15 advanced left-handed players and 15 advanced right-handed players. Subjects played short musical examples on the recorder with traditional fingering and then with reversed hands. The performance was evaluated by two judges. Beginning right-handed musicians who performed upon the "reversed" recorder played as well as performers who were left-handed and played the soprano recorder traditionally, with their dominant hand on the top half of the instrument. The left- and right- handed advanced musicians played the musical examples equally well in both the traditional style and in the "reversed style."