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Recently, models of aggressive behavior have begun to appreciate the influence of both psychological and biological predictors of maladaptive behavior. The aim of the current project was to clarify the roles that the noradrenergic system (i.e., norepinephrine metabolite, 3-methoxy-4-hydroxyphenyglycol [MHPG]) and characteristics of the rearing environment play in different expressions of aggression (i.e., hostile and instrumental). It was predicted that higher concentrations of MHPG would be related to increased self-reports of aggressive behavior, especially hostile forms, while expressing aggression during an analog aggression task would lead to decreases in MHPG. It was also predicted that concentrations of MHPG would interact with childhood environment characteristics to predict aggressive behavior in youth. A sample of 68 male youth, aged 7 to 17, were recruited from two agencies in southwest Virginia serving disadvantaged youth. They completed self-report measures on their childhood environment, aggressive and delinquent behaviors, as well as exposure to community violence and negative life events. In addition, youth played a challenging computer game with an alleged "opponent" and lost. Half of the participants were able to retaliate after the game against their "opponent." Salivary MHPG was measured once before and three times after the game. A series of ANOVAs and hierarchical regressions were conducted in order to test the main and interactive effects of punitive childhood experiences and baseline MHPG on aggressive behavior. Findings failed to support the primary predictions; however, results of supplemental analyses showed significant associations of aggression with negative mood, negative family atmosphere, and increased baseline MHPG after controlling for negative family atmosphere. Also, parental punishment and rejection significantly predicted delinquency, and a significant interaction effect indicated that higher recovery concentrations of MHPG placed rejected youth more at risk for engaging in delinquent behavior. Results of the present study help to enhance understanding of the differences in biological and psychological correlates of aggression and delinquency in at-risk youth, and inform prevention and intervention efforts. / Ph. D.

This paper investigates the effect of innovation on income inequality in Sweden, which to the best of my knowledge has not been explored previously. I use data on the number of patent applications to measure innovation, while income inequality is measured as the income share that goes to the top 1% of income earners. To address potential endogeneity issues, I apply an instrumental variables approach with municipality and time fixed effects. I instrument for innovation using data on funding from Vinnova to research projects.  I find persistent positive estimates of the effect of innovation on income inequality, which is in line with previous research. However, due to issues with potential bias from violated identifying assumptions and statistical significance, I am unable to say anything about the causal effect. Nonetheless, the results indicate that policymakers may need to consider balancing the benefits of innovation with potentially harmful consequences of higher degrees of income inequality. Because of this, further research is necessary for formulating effective policies to manage the trade-offs between promoting innovation and mitigating income inequality.

Thesis (M.Mus.)-- University of Stellenbosch, 2006. / ENGLISH ABSTRACT: Of an inter-disciplinary nature, this thesis examines certain pertinent psychological aspects with regard to one-on-one instrumental teaching at the tertiary level. It is apparent that this area has not been the focus of much investigation. However, in recent years, together with research into new, forward-thinking philosophies in music education, there has been an examination of some psychological aspects pertaining to instrumental teaching by researchers such as Mackworth-Young (1990), Kennell (2002), and Creech & Hallam (2003). Although most researchers have focused primarily on students of school-going age, more recently attention has begun to be given to tertiary level instrumental teaching. There are many ways to approach one-on-one instrumental teaching. There is no doubt that these have been tried and tested, and, in their own way, have been successful. They range from the traditional to the master-apprenticeship model, the latter most commonly used in university music departments. While it is not the purpose of this thesis to discuss pedagogical principles per se, the researcher proposes a student-centred model based on humanistic trends in psychology, with particular reference to Rogers. This model emphasises the importance of the teacher/student relationship and a holistic view of students. In addition, the developmental stage of university students is investigated in order to provide more insight and understanding of students’ place in the life cycle. Such psychological knowledge can equip teachers with skills, which would assist them to deal with sensitive issues that may be beyond their common sense and expertise. Consequently, the application of these psychological principles to instrumental teaching at the tertiary level is investigated by examining both the teacher/student relationship and a student-centred approach in the studio. A student-centred focus is one where the teacher has a facilitative function. Such a teacher leads students to be proactive and to be full participants in their own learning process. Consequently students would develop critical thinking and problem-solving skills. At the same time they would learn how to take responsibility for their actions. In such a milieu they are given the freedom to express themselves without fear of reprisal, and are made aware that they are valued and accepted unconditionally as unique individuals. This kind of environment should encourage the development of both cognitive and affective aspects of their personalities while simultaneously being conducive to optimal learning and to the maximising of their full potential at this stage. This researcher believes that the student-centred approach offers a more humanizing view than the traditional view of teaching. It is not the intention of the researcher to reject other styles of teaching, since it is fully appreciated that there are diverse views, which have their merit and should be recognised. However, there is a need to investigate whether student-centred teaching can be used exclusively, or whether it can offer an alternative to more conventional approaches, working independently of or perhaps complementarily to these. / AFRIKAANSE OPSOMMING: Hierdie tesis is van interdissiplinêre aard en eksamineer daarom pertinente psigologiese aspekte met betrekking tot individuele (een-tot-een) instrumentale onderrig op tersiêre vlak. Klaarblyklik het navorsing nog nie veel op hierdie terrein gefokus nie. In die onlangse verlede is navorsing egter wel gedoen oor nuwe, progressiewe musiekopvoedingsfilosofieë, onder andere in verband met psigologiese aspekte van instrumentale onderrig, deur navorsers soos Mackworth-Young (1990), Kennel (2002), en Creech & Hallam (2003). Hoewel die meeste navorsers primêr op studente van skoolgaande ouderdom gefokus het, is daar meer onlangs begin om aandag te skenk aan instrumentale onderrig op tersiêre vlak. Individuele instrumentale onderrig kan op baie maniere geskied. Ongetwyfeld is hierdie metodes deeglik beproef en is hulle, in eie reg, suksesvol. Dit sluit uitgangspunte in wat strek vanaf die tradisionele- tot die meester-vakleerlingmodel. Laasgenoemde is die model wat oorwegend in musiekdepartemente van universiteite gebruik word. Omdat die primêre doelstelling van hierdie tesis nie die bespreking van pedagogiese beginsels as sodanig is nie, stel die navorser 'n studentgesentreerde model, gebaseer op humanistiese tendense in die sielkunde met besondere verwysing na Rogers, voor. Dié model beklemtoon die belangrikheid van die dosent/studentverhouding asook 'n holistiese siening van studente. Daarbenewens word die persoonlike ontwikkelingsfaktore van universiteitstudente ondersoek met die oog op verkryging van insig in en begrip van die plek wat die studentfase in die lewenssiklus beklee. Sielkundige kennis van dié aard kan dosente vaardighede bied wat kan help om doeltreffend om te gaan met sensitiewe kwessies wat dalk buite die grense van ouderwetse gesonde verstand en vakkennis val. Gevolglik word die toepassing van hierdie psigologiese beginsels op instrumentale onderrig op tersiêre vlak nagespoor deur 'n ondersoek na die dosent/studentverhouding en 'n studentgesentreerde benadering in die onderrigstudio. 'n Studentgesentreerde pedagogiese fokus behels dat die dosent 'n fasiliterende funksie moet verrig. So 'n dosent lei studente om pro-aktief te wees en om volledige deelnemers in hul eie leerproses te word. Studente sal gevolglik kritiese denke en vaardighede in probleemoplossing ontwikkel. Terselfdertyd leer hulle verantwoordelikheid vir hul aksies aanvaar. In so 'n milieu word aan hulle vryheid van selfuitdrukking, sonder vrees vir vergelding, gebied en raak hulle bewus daarvan dat hulle, as unieke individue, onvoorwaardelik aanvaar en waardeer word. Hierdie soort omgewing behoort die ontwikkeling van beide die kognitiewe en affektiewe persoonlikheidsaspekte aan te moedig terwyl dit terselfdertyd bevorderlik is vir optimale leer en die maksimale ontplooiing van hul volle potensiaal op hierdie stadium. Hierdie navorser glo dat die studentgesentreerde benadering 'n meer humaniserende gesigspunt bied as dié van die tradisionele onderrrigmodel(le). Die navorser beoog nie om ander onderrigstyle te verwerp nie, want daar is waardering vir die feit dat diverse merietedraende sienings bestaan wat erkenning verdien. Tog bestaan die behoefte om na te vors of studentgesentreerde onderrig eksklusief gebruik kan word en of dit 'n alternatief kan bied vir meer konvensionele benaderings waarmee dit òf onafhanklik òf dalk komplimenterend in verhouding kan staan.

Instrumental music classes in the public schools of Tulsa, Oklahoma, have experienced a phenomenal growth during the past twenty years. Prior to this period, opportunity for instrumental music expression was limited to the high school band and orchestra,which rehearsed outside of school hours. No instruction other than this was provided and the student who wished to play in the school band or orchestra studied first from private instructors. In this study the investigator has examined a great many devices for measuring capacities and aptitudes which are known to the profession. He has attempted to evaluate these procedures in the light of sound educational philosophy. He has set forth a plan which he believes will materially improve the instrumental program through discovering unsuspected musical capacity and through sound guidance in the selection of suitable instruments.