Gender differences in musical motivation at different levels of expertise

Recently, models have been developed that recognise the complexity of motivation. These set out the interactions that occur between environmental (cultural, institutional, familial, educational) and internal factors (cognition and affect) enhancing or reducing motivation. Despite this we know very little about gender differences in motivation in relation to playing an instrument. The current study aimed to address this issue, exploring gender differences in motivation and whether these changed as expertise developed. A total of 3325 children ranging in level of expertise from beginner through to Grade 8 level in independent instrumental music examinations completed a questionnaire that included a seven-point Likert scale with statements exploring different aspects of motivation. A principal components analysis was undertaken and six factors emerged: support and social affirmation; social life and enjoyment of musical activities; enjoyment of performing; self-beliefs; enjoyment of lessons, playing and practise; and disliking practise. The only statistically significant gender difference was in relation to self-beliefs with the boys consistently scoring higher. Further research is needed to establish why this is the case. The findings have major implications for education

Relationships between practice, motivation, and examination outcomes

While there has been a great deal of research on instrumental practice and the nature of motivation to engage with music making, there has been relatively little that has considered the relationship of these with instrumental examination outcomes. This research aimed to address this issue. A total of 2,131 young musicians, aged 6–19, across a wide range of expertise, with a range of examination outcomes responded to a series of statements on a 7-point Likert scale relating to practice and motivation. Those merely awarded a pass grade in their examinations tended to undertake the least practice. Factor analysis revealed seven factors relating to practice and six to motivation. Multivariate analysis of variance showed that there were statistically significant differences between those with different examination outcomes in relation to the organization of practice, the use of recordings and the metronome, the adoption of analytic strategies, social life, and self-belief in musical ability. Students who received merely a pass grade in their examination responded least positively to these statements. Those who had failed were most likely to adopt ineffective practice strategies and were less likely to enjoy performing, playing, lessons, and practice. The findings are discussed in relation to earlier research

Are there differences in practice depending on the instrument played?

There has been little research on instrument differences in the length and nature of instrumental practice or how these may interact with level of expertise. This paper aimed to address this issue. A total of 3,325 young people ranging in level of expertise from beginner to the level required for entry to higher education conservatoire completed a questionnaire which consisted of a number of statements relating to time spent practicing, practicing strategies, organization of practice, and motivation to practice with a seven-point rating scale. Data were analyzed in relation to nine levels of expertise. Factor analysis revealed seven factors which were used to make comparisons between those playing different classical instruments. The findings showed that those playing keyboard instruments practiced the most, followed by strings, brass, and woodwind. There were relatively few statistically significant instrument differences in practice strategies. Where there were differences it was the woodwind players who tended to adopt less effective strategies. There were some interactions between level of expertise and practice which generally showed no clear patterns suggesting complexity in the development of musical expertise in relation to different instruments. The findings are discussed in terms of possible reasons for these differences

ISO LWS Spectra of T Tauri and Herbig AeBe stars

We present an analysis of ISO-LWS spectra of eight T Tauri and Herbig AeBe young stellar objects. Some of the objects are in the embedded phase of star-formation, whereas others have cleared their environs but are still surrounded by a circumstellar disk. Fine-structure lines of [OI] and [CII] are most likely excited by far-ultraviolet photons in the circumstellar environment rather than high-velocity outflows, based on comparisons of observed line strengths with predictions of photon-dominated and shock chemistry models. A subset of our stars and their ISO spectra are adequately explained by models constructed by Chiang & Goldreich (1997) and Chiang et al. (2001) of isolated, passively heated, flared circumstellar disks. For these sources, the bulk of the LWS flux at wavelengths longward of 55 µm arises from the disk interior which is heated diffusively by reprocessed radiation from the disk surface. At 45 µm, water ice emission bands appear in spectra of two of the coolest stars, and are thought to arise from icy grains irradiated by central starlight in optically thin disk surface layers

High fidelity imaging of geosynchronous satellites with the MROI

Interferometry currently provides the only practicable way to image satellites in Geosynchronous Earth Orbit (GEO) with sub-meter spatial resolution. The Magdalena Ridge Observatory Interferometer (MROI) is being funded by the US Air Force Research Laboratory to demonstrate the 9.5 magnitude sensitivity (at 2.2 µm wavelength) and baseline-bootstrapping capability that will be needed to realize a useful turn-key GEO imaging capability. This program will utilize the central three telescopes of the MROI and will aim to validate routine acquisition of fringe data on faint well-resolved targets. In parallel with this effort, the University of Cambridge are investigating the spatial resolution and imaging fidelity that can be achieved with different numbers of array elements. We present preliminary simulations of snapshot GEO satellite imaging with the MROI. Our results indicate that faithful imaging of the main satellite components can be obtained with as few as 7 unit telescopes, and that increasing the number of telescopes to 10 improves the effective spatial resolution from 0.75 meter to 0.5 meter and enables imaging of more complex targets.This is the author accepted manuscript. The final version is available from SPIE via http://dx.doi.org/10.1117/12.223247

Urban Tree Height Assessment Using Pictometry Hyperspatial 4-Inch Multispectral Imagery

Tree height is a critical variable of forest inventory assessments, and estimating the height of trees has been a component of forest inventory assessments for decades. The actual tree height of 60 open-grown baldcypress (Taxodium distichum) trees measured with a telescopic height pole were compared to Pictometry hyperspatial 4-in. multispectral imagery estimated tree height on the campus of Stephen F. Austin State University, Nacogdoches, Texas. Linear correlation coefficients (r) between actual tree height and Pictometry-estimated tree height for all 60 trees and the shortest 30 and tallest 30 trees were [1]0.997 for all r values. Pictometry estimated tree height was within, on average, 1.77, 2.15, and 1.40% of actual tree height for all 60 trees, the shortest 30 trees, and the tallest 30 trees, respectively. All three paired t-tests, for all 60 trees, the shortest 30 trees, and the tallest 30 trees, resulted in a P value [1]0.08, indicating that there was no statistical significance between actual and estimated tree height at a 95% confidence level. Pictometry-estimated tree height can be used in lieu of field-based tree height estimation for open-grown urban forests

Changes in motivation as expertise develops: Relationships with musical aspirations

Recent models of musical motivation have recognised the complex interactions which occur between environmental (cultural, institutional, familial, educational) and internal factors (cognition and affect) in enhancing or reducing motivation. Much previous research has been small scale and not taken account of long term musical aspirations. This article aims to address these issues exploring changes in motivation as expertise develops with a large sample of learners. A total of 3,325 young musicians, aged 6–19 playing a wide range of instruments participated. They represented nine levels of expertise ranging from beginner to higher education conservatoire entry level. Level of expertise was established in terms of the most recent graded independent instrumental examination taken. They were asked to respond to a series of statements on a 7-point Likert scale. The statements focused on well-established elements of motivation including: self-beliefs; enjoyment of musical activities; enjoyment of performance; level of support received from parents, friends and teachers; attitudes towards playing an instrument and perceptions of its value; and beliefs about the importance of musical ability. Participants were also asked to respond to statements about their long term musical aspirations. An exploratory factor analysis provided the basis for the development of a motivational scale which included five sub-scales: social support and affirmation; social life and the value of playing an instrument; enjoyment of performing; self-belief in musical ability; and enjoyment of instrumental musical activities. There were linear trends for each of the five sub-scales in relation to level of expertise with the exception of social support and affirmation. The five sub-scales collectively predicted a composite score relating to aspirations with a multiple R of .64

Are there gender differences in instrumental music practice?

This research aimed to consider whether there were gender differences in the amount of practice undertaken by boys and girls, the practice strategies adopted and motivation to practise. A sample of 2027 girls and 1225 boys aged 6-19 years, ranging in level of expertise from beginner through to conservatory entrance level, playing instruments representative of the classical and popular instruments played in the UK completed a self-report Likert scale questionnaire. There were no statistically significant gender differences in weekly practice time or motivation to practise. Factor analysis of statements relating to practice revealed seven factors. There were statistically significant gender differences in relation to the adoption of systematic practice strategies (girls were more systematic), concentration (boys perceived they had higher levels of concentration) and immediate correction of errors (girls reported more immediate correction). There were no statistically significant gender differences in relation to the organisation of practice, the use of recordings and a metronome, the use of analytic strategies, and the adoption of ineffective practice strategies although for this factor there was a statistically significant interaction between gender and level of expertise

Spectral Energy Distributions of T Tauri and Herbig Ae Disks: Grain Mineralogy, Parameter Dependences, and Comparison with ISO LWS Observations

We improve upon the radiative, hydrostatic equilibrium models of passive circumstellar disks constructed by Chiang & Goldreich (1997). New features include (1) account for a range of particle sizes, (2) employment of laboratory-based optical constants of representative grain materials, and (3) numerical solution of the equations of radiative and hydrostatic equilibrium within the original 2-layer (disk surface + disk interior) approximation. We explore how the spectral energy distribution (SED) of a face-on disk depends on grain size distributions, disk geometries and surface densities, and stellar photospheric temperatures. Observed SEDs of 3 Herbig Ae and 2 T Tauri stars, including spectra from the Long Wavelength Spectrometer (LWS) aboard the Infrared Space Observatory (ISO), are fitted with our models. Silicate emission bands from optically thin, superheated disk surface layers appear in nearly all systems. Water ice emission bands appear in LWS spectra of 2 of the coolest stars. Infrared excesses in several sources are consistent with vertical settling of photospheric grains. While this work furnishes further evidence that passive reprocessing of starlight by flared disks adequately explains the origin of infrared-to-millimeter wavelength excesses of young stars, we emphasize how the SED alone does not provide sufficient information to constrain particle sizes and disk masses uniquely.Comment: Accepted to ApJ, 35 pages inc. 14 figures, AAS preprin