An Exploratory Study on the Interrelationship of Internet Addiction, Internet Usage Motivation, Internet Usage Behavior and User Characteristics for Taiwan High School Students. Chieh-Ju Tung Abstract The purpose of this study was to examine the interrelationship among motivation and gratification level, activities, personality and Internet addiction for Taiwan¡¦s high school students based on the Uses and Gratifications Theory. The characteristics of those identified as addicted are investigated along with the factors of demographic data, motivation and gratification, web attitude and personality. Moreover, structural equation modeling was used to verify the Theory. The study was conducted using purposive sampling at two major municipals in Taiwan. Questionnaires including Pathological Internet Use Scale for Taiwan high school student, Diagnoistic Questionnaires, Internet usage Motivation and Gratification Scale, Interpersonal Relationship Scale, Self-Esteem Scale, Center for Epidemiologic Studies Depression Scale, Internet Usage Behavior Questionnaire, Perceptions of the Internet Influences and Demographic Data. Of the 1708 qualified samples, 236 were classified as Internet addicted. Major findings of the study are: 1. Entertainment is the major factor for high school students to use Internet, information searching stands as second. Surfing with motivation of social and entertainment has positive correlation with Internet addiction. Those classified as addicted have higher motivation on social and entertainment and have higher satisfaction thereafter. 2. Males who own computer, with grades in lower two-thirds of the class, with more than 4 years Internet usage experience, always using cyber-café or surfing during weekday have higher tendency to become addicted. 3. System and location of school, the grade attended or whether access Internet at home have no relationship with addiction. 4. The average weekly hours on Internet is positive correlated with Internet addiction. 5. Students with personality of dependence, shyness, depression or lower self-esteem have higher tendency to become addicted. 6. The probability of males to become addicted is 2.6 times that of females. Vocational high school students have higher tendency to become addicted than non-vocational high school students. 7. The average weekly hours on Internet for those addicted is 21.2 hours, it¡¦s 1.75 times that of normal ones. 8. Those identified as addicted always surf in cyber-café and favor on-line games, chat room and sex-related activities. 9. Those identified as addicted have lower self-esteem and higher depression. 10. Internet addiction has significant canonical correlation with motivation on social/entertainment and hours on Internet. 11. Internet addiction has significant canonical correlation with shyness, depression emotion, poor interpersonal relationship, negative self-concept and lower self-esteem. 12. The theoretical model constructed in this study could explain the relationship among main variables by Amos. 13. ¡§Internet usage motivation¡¨ has greatest direct effect on addiction. It has greatest total effect when combines with the factor of ¡§Average weekly hours on Internet ¡¨. 14. The predictability for Internet addiction is 62% when six variables were used (Motivation on social, Motivation on entertainment, Average weekly hours on Internet, Interpersonal relationship, Depression and Self-esteem). Finally, suggestions on counseling addicted students are made for government and high school authorities, counselors and parents. Issues for futher study are also discussed.

ABSTRACT Depression is one of the oldest known mental health conditions. It is acknowledged to be a global health problem that affects people from any culture or ethnic group. The prevalence of depression widely varied across countries and cultures. The cross-cultural relevance of the concept of depression, its screening or diagnosis, and cultural equivalence of items used to measure symptoms of depression has been area of research interest. Differences in prevalence rates in depression have been suggested as being due to research artifacts, such as use of instrument developed for one culture to another culture. With the current trend of globalization and increased rate of immigration, the need for measurement scales that can be used cross-culturally is becoming essential. Translation and adaptation of existing tools to different languages is time saving and cost effective than developing a new scale. The Center for Epidemiologic Studies Depression Scale [CES-D; (Radloff, 1977)] has been widely used as a screening tool for depressive symptoms in community and clinical settings. It has been widely accepted and translated to multiple languages and its measurement equivalence tested across groups. This study was designed as a mixed method study. The purpose of this study was three fold: (a) translate and adapt the CES-D scale into Tigrigna Language for use by Tigrigna speaking Eritrean immigrants in the United States using the forward backward translation and cognitive interview techniques (b) test the psychometric properties of the Tigrigna version CES-D scale using confirmatory factor analysis under the framework of structural equation modeling and (c) test measurement equivalence of the scale by comparing data collected from 253 Eritrean immigrants using the Tigrigna version CES-D scale with a secondary data collected from 1918 non Eritrean US citizens using the English version CES-D scale in a separate study. The baseline four factor CES-D scale model originally suggested for the general population fitted the data from both samples. The fit indices for the Tigrigna sample were (χ2 = 299.87, df = 164, RMSEA = .06, SRMR = .06, GFI = .89, and CFI = .98) and for the English sample (χ2 = 1496.81, df = 164, RMSEA = .07, SRMR = .04, GFI = .92, and CFI = .98). The Multi-group confirmatory factor analysis showed reasonably adequate fit (χ2 (328) = 1796.68, RMSEA= .07, SRMR = .06, GFI = .89, CFI = .98). Fourteen of the 20 CES-D items were invariant across the two samples suggesting partial metric invariance. Partial full factor invariance was also supported. In conclusion, the findings of this study provide adequate evidence in support of the applicability of the four factor CES-D scale for measuring depressive symptoms in Tigrigna speaking Eritrean immigrants/refugees in the United States.

Social science researchers are increasingly using multi-group confirmatory factor analysis (MG-CFA) to compare different groups' latent variable means. To ensure that a MG-CFA model is identified, two approaches are commonly used to set the scale of the latent variable. The reference indicator (RI) strategy, which involves constraining one loading per factor to a value of one across groups, assumes that the RI has equal factor loadings across groups. The second approach involves constraining each factor's variance to a value of one across groups and, thus, assumes that the factor variances are equal across groups. Latent mean differences may be tested and described using Gonzalez and Griffin's (2001) likelihood ratio test (LRT[subscript k]) and Hancock's (2001) standardized latent mean difference effect size measure ([delta subscript k]), respectively. Applied researchers using the LRT[subscript k] and/or the [delta subscript k] when comparing groups' latent means may not explicitly test the assumptions underlying the two factor scaling methods. To date, no study has examined the impact of violating the assumptions associated with the two scaling methods on latent mean comparisons. The purpose of this study was to assess the performance of the LRT[subscript k] and the [delta subscript k] when violating the assumptions underlying the RI strategy and/or the factor variance scaling method. Type I error and power of the LRT[subscript k] as well as relative parameter bias and parameter bias of the [delta subscript k] were examined when varying loading difference magnitude, factor variance ratio, factor loading pattern and sample size ratio. Rejection rates of model fit indices, including the x² test, RMSEA, CFI, TLI and SRMR, under these varied conditions were also examined. The results indicated that violating the assumptions underlying the RI strategy did not affect the LRT[subscript k] or the [delta subscript k]. However, violating the assumption underlying the factorvariance scaling method influenced Type I error rates of the LRT[subscript k], particularly in unequal sample size conditions. Results also indicated that the four factors manipulated in this study had an impact on correct model rejection rates of the model fit indices. It is hoped that this study provides useful information to researchers concerning the use of the LRT[subscript k] and [delta subscript k] under factor scaling method assumption violations. / text

Current literature lacks longitudinal understandings of the association between childhood sexual/physical violence, alcohol use, depressive symptoms, and indiscriminant sexual behaviors among young women, as well as the racial/ethnic differences in these associations. Therefore, using the 1994-2008 National Longitudinal Study of Adolescent Health, this study examined a) heterogeneous growth trajectories of problem alcohol use during the transition from adolescents to young adulthood and the impact of childhood sexual/physical violence on drinking trajectories, b) the long-term impact of childhood sexual/physical violence on alcohol use and depressive symptoms, and c) the structural associations between childhood sexual/physical violence and indiscriminant sexual behaviors by examining alcohol use and depressive symptoms as mediators between White and African-American women. First, with 1,702 women, LCGM was used to identify trajectories of problem alcohol use using the first three waves. Four trajectories of problem alcohol use emerged: stable abstainers; decliners (moderate-low); incliners (low-moderate); and rapid incliners (low-high). From the bivariate level analyses, in reference to stable abstainers, White women who experienced childhood sexual/physical violence were more likely to be rapid incliners (low-high). Second, with 1,756 women, autoregressive cross-lagged path models were performed to test longitudinal associations between childhood sexual/physical violence, problem alcohol use, and depressive symptoms of White and African-American women. Both groups demonstrated significant association between childhood sexual/physical violence and subsequent development of depressive symptoms, while only White women demonstrated significant association with subsequent problem alcohol use. Third, with 1,388 women, SEM and multigroup SEM were used to test pathways between childhood sexual/physical violence and indiscriminant sexual behaviors for White and African-American women. SEM indicates that problem alcohol use and depressive symptoms mediated the proposed relationship. Multigroup SEM indicates that, for White women, both problem alcohol use and depressive symptoms mediated the association between childhood sexual/physical violence and indiscriminant sexual behaviors, while only depressive symptoms mediated the proposed association for African-American women. These findings highlight the importance of designing and providing effective prevention and treatment programs for women who experienced childhood sexual/physical violence to interrupt subsequent problem alcohol use, depressive symptoms, and indiscriminant sexual behaviors. / text

Innerhalb der letzten zwei Jahrzehnte ist die Entwaldungsrate auf Sumatra, Indonesien stark gestiegen, dies geht einher mit eine Umwandlung von Tieflandwäldern in Ölpalm- (Elaeis guineensis) und Kautschukmonokulturplantagen (Hevea brasiliensis). Es wurde festgestellt, dass Landnutzungsänderungen in landwirtschaftlichen Systemen die Bodennährstoffbestände sowie die Umsatzrate von Bodennährstoffen senkt, dies kann zu einer Abhängigkeit vom Einsetzen von Düngemitteln führen, die nur eine zeitweise Verfügbarkeit von Nährstoffen gewährleistet. Des Weiteren bedroht die Umwandlung von Wald in Monokulturen die hohe Biodiversität, welche in tropischen Wäldern vorherrscht, was wiederum die Funktionsweise des Ökosystems beeinflusst. Der Schwerpunkt dieser Arbeit lag darin, die Auswirkungen der Landnutzungsänderung auf Bodennährstoffhaushalt und Ökosystemdynamiken festzustellen, sowie die Mechanismen die für die Veränderungen verantwortlich sind zu verstehen. Alle Drei Studien waren Teil eines großen interdisziplinären Projekts welches die ökologischen und sozialen Effekte von tropischen Landnutzungsveränderungen untersucht. Die Probenentnahme für jede Studie erfolgte in der Region von Jambi auf Sumatra, Indonesien – ein Gebiet das früher dicht bewaldet war, aber eine starke Entwaldung erfahren hat. Es wurden zwei Landschaften ausgesucht, die sich über ihre vorherrschende Bodentextur und ihren Bodentyp definieren und die Region natürlich repräsentieren: zum einen waren dies lehmige Acrisole und zum anderem tonige Acrisole. In den beiden Bodenlandschaften wurden vier Systeme untersucht: Tieflandregenwald und regenerierter Wald durchsetz mit Kautschukbäumen (hier benannt als „Jungle-rubber“) sowie Monokulturen von Kautschuk (Sein bis 17 Jahre alt) und Ölpalmen (Neun bis 16 Jahre alt). Das Ziel der ersten Studie war zu bewerten, wie sich die Umsatzrate von Stickstoff (N) im Boden in Bezug auf die Umwandlung von Wald in Kautschuk- und Ölpalmplantagen verändert. Die Bruttoumsatzrate von Stickstoff im Boden wurde mit der 15N-Verdünnungsmethode mit in situ Inkubation der Bodenbohrkerne bestimmt. In den Lehm-Acrisolen, in denen die Bodenfruchtbarkeit gering war, waren auch die mikrobielle Biomasse, die Bruttostickstoffmineralisation und die Immobilisierung von Ammonium (NH4+) gering und es wurden keine signifikanten Veränderungen durch die Landnutzung aufgezeigt. Die Ton-Acrisole welche eine höhere Ausgangsfruchtbarkeit, bezogen auf die Referenzflächen, aufwiesen, waren auch einen höheren Anteil an mikrobielle Biomassen sowie durch höhere NH4+-Umwandlungsraten im Vergleich zu den Lehm-Acrisolen gekennzeichnet. In den Ton-Acrisolen hat die Umwandlung von Wald und Jungle-rubber in Kautschuk- und Ölpalmplantagen zu einer Verringerung der Bodenfruchtbarkeit geführt, was wiederum zu einer Reduzierung der mikrobiellen Biomasse und der NH4+-Umwandlungsraten beigetragen hat. Unsere Ergebnisse lassen annehmen, das je höher die Ausgangsbodenfruchtbarkeit und Stickstoffverfügbarkeit im Boden ist, desto höher ist die Reduktionen durch die Landnutzungsänderungen. Das Ziel der zweiten Studie war es, Veränderungen biochemischer Charakteristika des Bodens sowie des Nährstoffbestandes bis 2 m Bodentiefe in den verschiedenen Landnutzungssystemen zu erfassen und die Proportionen der Gesamtvarianz der biochemischer Bodencharakteristika zu bestimmen, die durch die räumlichen Komponenten in unserem experimentellem Design hervorgerufen werden. Der Tongehalb beeinflusst die Bodenfruchtbarkeit und die größeren Nährstoffbestände wurden in den Referenzflächen der Ton-Acrisolen gefunden. Bewirtschaftungspraktiken in den veränderten Landnutzungssystemen übten den größten Einfluss auf Boden-pH, Basensättigung, extrahierbaren Phosphor und austauschbares Natrium aus. Die Mehrheit der biochemischen Bodencharakteristika und der Nährstoffbestände wurden nicht signifikant durch Landnutzungsänderungen verändert. Basierend auf der Varianzkomponentenanalyse der verschachtelten räumlichen Struktur des experimentellen Designs, wurde die Gesamtvarianz von vielen biochemischen Bodencharakteristika durch die Abweichungen zwischen replizierten Plots und nicht durch die unterschiedliche Landnutzung erklärt. Dieses Ergebnis deutet darauf hin, dass wenn man signifikante Effekte von Landnutzungsänderungen auf biochemische Bodencharakteristika feststellen will, die Stichprobenzahl replizierter Plots pro Landnutzungssystem erhöht werden muss. Das Ziel der dritten Studie war es, zwischen direkten Landnutzungseffekten und indirekten „Bottom-up“-Effekten auf ober- und unterirdisch lebende Taxa zu differenzieren. Es wurden allgemeine „Multilevel path“- Modelle (eine Form von Strukturgleichungsmodellen), die eine Berechnung direkter und interaktiver Effekte von Landnutzung mit abiotischen Variablen und „Bottom-up“-Effekten zwischen biotischen Variablen zulassen, auf der Basis von Daten von Pflanzen, Mikroorganismen, Invertebraten der Streuschicht, baumbewohnende Ameisen, Vögeln und Umweltparametern (Boden- und Mikroklimaeigenschaften) entworfen. Die Ergebnisse der „Multilevel path“- Modelle zeigen, dass die Landnutzungsänderungen direkte Effekte auf Pflanzen, unterirdisch lebende Taxa einer niedrigen trophischen Ebene (z.B. Saprobionten und Herbivoren) und baumbewohnende Ameisen haben, fast alle Landnutzungsauswirkungen auf höhere trophische Ebenen von Invertebraten und Vögel waren jedoch „Bottom-up“-kontrolliert. Diese Studie lässt erkennen, dass Landnutzungsveränderungen, direkt und indirekt, ökologische Verschiebungen im großen Rahmen lenken. Die gefundenen Effekte auf höhere trophische Ebenen sind jedoch meistens von den Organismen der darunterliegenden trophischen Ebenen abhängig. Die Stickstoffumsatzraten im Boden und der Umfang der Stickstoffpools, welche in der ersten Studie gemessen wurden, wurden parallel mit Studien zur Stickstoffoxidemission und Stickstoffauswaschung des Bodens durchgeführt, um ein ganzheitliches Bild des Stickstoffhaushaltes in den veränderten Landschaft zu erhalten. Analysen zur Probenoptimierung wurden für die biochemischen Bodencharakteristika der oberen Bodenschicht bis 0,5 m aus der zweiten Studie durchgeführt, um festzustellen was die minimale Anzahl an Replikaten pro Landnutzungstyp ist, um signifikante Unterschiede zwischen den Landnutzungssystemen in unserem experimentellen Design festzustellen. Die Bodenkomponenten die in die „Multilevel path“- Modelle integriert waren, wurden erfasst und direkte Zusammenhänge zwischen diesen Bodeneigenschaften und der Biodiversität des Ökosystems und den Biomassen wurden untersucht, um ein besseres Verständnis davon zu bekommen, welche Rolle Bodennährstoffbeständen für die transformierten Systeme spielen. Insgesamt zeigen die Ergebnisse der drei Studien, dass die Bodennährstoffbestände eine wichtige Komponente des Ökosystems darstellt und Veränderungen der Bodennährstoffbestände durch Landnutzungsänderungen Auswirkungen auf die Biodiversität und die Funktionsweise des Ökosystems haben können.

The effect of inclusion rate of pea meal (PM), pea protein concentrate (PPC), soybean meal (SBM), soy protein concentrate (SPC), canola meal (CM) and canola protein concentrate (CPC) in salmonid diets was determined through six corresponding meta-analyses of all data available in the literature for these six feed ingredients, which was followed by weighted regression analysis. Increasing dietary inclusion levels of SBM, SPC, CM and CPC reduced specific growth rate (SGR). Regression analysis determined all of these relationships to be linear declines in SGR (P < 0.05). Inclusion levels of PM or PPC did not influence salmonid SGR (P > 0.05). These results showed that the influence plant proteins have on salmonid SGR is dependent on ingredient type and inclusion level. PM, PPC, SBM, SPC, CM an aqueous-extracted CPC and a high phytate CPC (PCPC) were analyzed for chemical nutrient (proximate, amino acid and phosphorus analysis) and antinutrient composition and total tract digestibility (two separate digestibility trials) in rainbow trout (Oncorhynchus mykiss). The digestibility of proximate chemical components and amino acids were significantly higher for the soy products than the pea products. These digestibilities were also significantly higher in protein concentrates than in plant meals. Dry matter and gross energy digestibility was higher in CPC than in CM (P < 0.05). Phosphorus digestibility was higher in CPC-fed fish than in CM-fed fish (P < 0.05), which is likely due to the fact that CPC did not contain phytic acid. Six consecutive growth studies (one trial per test ingredient) were conducted over a 361-day period to determine the effects of feeding increasing inclusion rates of PM, PPC, SBM, SPC, CM and CPC on the growth performance of rainbow trout. Diets were formulated based on the digestible nutrient content of all ingredients as determined in the previously conducted digestibility trials, to contain 0, 75, 150, 225 or 300 g/kg of each test ingredient. All diets were nutritionally equal and contained 17.6 MJ/kg digestible energy, 386.2 g/kg digestible crude protein and were balanced for digestible essential amino acids to meet or exceed the requirements of rainbow trout. Linear and quadratic analysis was conducted on the experimental data. There were no significant regressions resulting from feeding PM, SPC or CPC at 0-300 g/kg for average daily feed intake (ADFI), specific growth rate (SGR), feed conversion ratio (FCR) or protein efficiency ratio (PER). A positive relationship was associated between PPC inclusion and ADFI (P < 0.05). There was a significantly negative quadratic equation associated with the inclusion level of SBM on SGR and FCR and significantly negative linear and quadratic equations for PER. There were significantly negative linear relationships between the inclusion rate of CM and the SGR, FCR and PER of rainbow trout (P < 0.05). Growth trial results suggest at inclusion levels up to 300 g/kg, PM, PPC, SPC and CPC are feasible plant-based fish meal replacements with predictable growth effects, provided the nutritional constraints set in this experiment are followed. The results of these growth experiments were further analyzed using structural equation modeling to determine the relationship between ANF in the six ingredients and ADFI and SGR, which were transformed (tSGR and tADFI, respectively) to enable comparisons between experiments. All possible models between ingredient ANF (starch, phytic acid, glucosinolates, tannins, isoflavones, total NSP, soluble NSP, insoluble NSP and saponins) and ADFI and SGR were calculated. The model with the highest likelihood, as determined by the Akaike Information Criteria0, contained 29 parameters and six degrees of freedom. tADFI positively influenced tSGR. Glucosinolates, saponins, and phytates had a significantly negative impact on tADFI, whereas tannins had a significantly positive impact. The presence of saponins in the diet resulted in a decrease in tSGR. This structural equation model had significant correlations between all ANF, with the exception of phytates and saponins. Future applications of this work will be to develop a nutritional model for optimal inclusion of plant-based feed ingredients in rainbow trout diets, based on their ANF content, which may improve the accuracy of diet formulation and growth prediction.

This thesis investigates long-term cognitive outcome in two cohorts of adolescents and young adults exposed to stressors during the perinatal period: one group born preterm (&lt;37 weeks of gestation and birth weight &lt;1,500 g); one group exposed to two or more courses of antenatal corticosteroids (ACS), to stimulate lung maturation in the face of threatening preterm birth. In fetal life the brain undergoes dramatic growth, and a disruption to the early establishment of functional neural networks may interrupt development in ways that are difficult to predict. Executive function refers to a set of cognitive processes that are important for purposeful regulation of thought, emotion, and behavior, and even a subtle depreciation may influence overall functioning. Study I investigated the stability of executive function development after preterm birth. Executive functions were differentiated into working memory and cognitive flexibility. Both components were highly stable from preschool age to late adolescence. In Study II, we identified subgroups within the group of children born preterm with respect to cognitive profiles at 5½ and 18 years, and identified longitudinal streams. Outcome after preterm birth was diverse, and insufficiently predicted by perinatal and family factors. Individuals performing at low levels at 5½ years were unlikely to improve over time, while a group of individuals performing at or above norm at 5½ years had improved their performance relative to term-born peers by age 18. Studies I and II pointed to the need for developmental monitoring of those at risk, prior to formal schooling. Study III investigated long-term cognitive outcome after repeat ACS treatment. The study did not provide support for the concern that repeat ACS exposure will have an adverse impact on cognitive function later in life. In sum, exposure to perinatal stressors resulted in great variation in outcome. However, for many, their rough beginnings had not left a lasting mark. / <p>At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 1: Submitted.</p>

本研究旨在建構青少年藥物濫用與偏差行為之影響因素模式，並瞭解復原力如何對青少年藥物濫用與偏差行為產生影響。本研究共分為兩組，在一般組青少年的部份，以台灣地區11所國、高中職（含進修學校）1711 位青少年為研究對象;藥物濫用組則是以台灣地區13所矯治機構中，555位藥物濫用青少年為研究對象。研究工具包括衝動性人格量表、父母依附關係量表、師生互動關係量表、同儕關係量表、偏差同儕量表、青少年復原力量表、青少年偏差行為量表與藥物濫用程度量表。本研究採用描述性統計分析、探索性因素分析、驗證性因素分析、單因子多變量變異數分析、Pearson積差相關與結構方程模式進行資料分析。研究主要發現如下： （一） 藥物濫用組青少年之衝動性人格、與父母之間的疏離感、所接觸的偏差同儕及其行為偏差程度顯著高於一般組。 （二） 兩組青少年和父母、教師以及同儕之間均有良好的依附與互動關係。但一般組青少年之師生互動與同儕關係顯著高於藥物濫用組。 （三） 兩組青少年皆有良好的復原力。然一般組青少年在「同理心與人際互動」及「情緒調節」的得分上較高。而藥物濫用組則是在「希望與樂觀」的面向上得分較高。 （四） 整體而言，藥物濫用組青少年之藥物渴求與藥物依賴程度並不高。 （五） 衝動性人格與偏差同儕是直接影響青少年偏差行為的關鍵危險因子，而父母依附關係則是使得青少年偏差行為下降的保護因子。衝動性人格、師生互動關係、同儕關係以及偏差同儕會透過復原力，提高個體行為偏差的程度。僅有父母依附關係會透過復原力降低青少年的偏差行為。 （六） 藥物濫用雙模式驗證結果皆顯示復原力是直接影響青少年藥物濫用的關鍵保護因子；而偏差行為則是對青少年藥物濫用有直接影響的關鍵危險因子。衝動性人格、師生互動關係與偏差同儕都會透過復原力與偏差行為，而提高青少年藥物濫用的程度。而父母依附關係與同儕關係則是會透過復原力及偏差行為降低青少年的藥物濫用。 最後，根據本研究主要發現提出若干意見，以提供相關單位與人員在教育、犯罪矯正與學術研究上之參考。 / The aim of this study was to construct the factor model of drug abuse and delinquency among adolescent and to explore the influence of resilience on the factor model. The participants in this study were 1711 middle school students and 555 youth drug offenders in prisons in Taiwan. Moreover, the employed instruments included the Inventory of Impulsive Personality, the Inventory of Mentoring Function, the Inventory of Meaning Making, the Inventory of Parent Attachment, the Inventory of Teacher-student Interaction, the Peer Subscale of TRICA, the Inventory of peer delinquency, the Inventory of Adolescent Resilience, Juvenile delinquency Questionnaire, and the Inventory of Drug Abuse. The collected data was analyzed by descriptive statistics, exploratory factor analysis, confirmatory factor analysis, one-way MANOVA, Pearson correlation, and SEM. The main findings of this study were as follows: (1) Youth drug offenders had high levels impulsivity and engaged in more delinquent behavior than the normal group; they also felt more alienated by their parents; youth drug offenders’ peers engage in more delinquent behaviors than the normal subjects. (2) Both normal subjects and youth drug offenders were perceived high levels of teacher-students interaction, parental attachment, and good peer relationship. Nevertheless, normal subjects had stronger perceived teacher’s influence and better peer relationship than the youth drug offenders. (3) Both normal subjects and youth drug offenders had high levels of resilience; nevertheless, normal subjects outperformed the youth drug offenders on the “empathy and interpersonal interaction” and “emotional regulation”. Youth drug offenders outperformed the normal subjects on the “hope and optimism”. (4) Youth drug offenders didn’t have high levels of drug craving, dependence, and drug abuse. (5) Adolescent impulsive personality and peer delinquency as the risk factors had direct effects on juvenile delinquency; conversely, parental attachment was the protective factors. Moreover, adolescent impulsive personality, teacher-student interaction, peer relationship, and peer delinquency had indirect effect on their delinquent behavior via resilience. (6) According to these two factor models of drug abuse, teacher-student interaction and peer delinquency had direct effect on drug abuse for model 1; and only teacher-student interaction had direct effect on drug abuse for Model 2. Moreover, the results of these two factor models, resilience were the important protective factor against drug abuse; conversely, juvenile delinquency as the risk factor had the direct effect on drug abuse. As the result, impulsive personality, teacher-student interaction, and peer delinquency had indirect positive effect on drug abuse via resilience and juvenile delinquency; moreover, parental attachment and peer relationship had indirect negative effect on drug abuse via resilience and juvenile delinquency. Recommendations for family, school, correctional institution, and future study are discussed.

The purpose of the present study is to investigate the factors affecting mathematical literacy of 15-year-old students in Programme for International Student Assessment (PISA) across different cultural settings. The present study was conducted across three countries. These countries are Brazil, Japan and Norway. The countries were selected on the basis of their rankings in PISA 2000 study. Japan represented a high performing country with an average score of 557, Norway represented an average performing country with an average score of 499, and Brazil represented a low performing country with an average score of 334. The study explored how mathematical literacy is stimulated by predictors related to the students, the families and the school. A separate factor analysis was carried out for each questionnaire such as student questionnaire and cross curricular competencies questionnaire within the data of each country. Since the results of factor analyses of three countries were parallel, the observed variables representing the latent variables were selected from the student questionnaire and cross curricular competencies questionnaire administered in PISA 2000 in order to be used in the structural equation modeling. The included factors affecting mathematical literacy in PISA 2000 are attitudes towards reading, student-teacher relations, climate, communication with parents, usage of technology and facilities, attitudes towards mathematics and reading literacy. The proposed model was tested using structural equation modeling across three different cultures with different performance levels in PISA 2000. The findings of the study show that the latent independent variable having the strongest effect on mathematical literacy is the usage of technology and facilities in Brazil, communication with parents in Japan and attitudes towards reading in Norway. Moreover, the results were as follows: (1) Reading literacy significantly and positively influences mathematical literacy in all three countries. (2) There is a reciprocal relationship between the attitudes towards mathematics and mathematical literacy. In Brazil, the influence of attitudes towards mathematics on mathematical literacy is higher. However, the influence of mathematical literacy on attitudes towards mathematics is higher in Norway. (3) The attitudes towards reading have a negative direct effect and a positive indirect effect on mathematical literacy. (4) The student-teacher relations have a positive effect on mathematical literacy in Japan and Norway. But, in Brazil, this effect is negative. (5) The student-related factors affecting school climate are significantly and positively related to mathematical literacy in Brazil. On the other hand, the effect of climate on mathematical literacy is negative in Japan and non-significant in Norway. (6) Communication with parents significantly and positively influences the mathematical literacy in all three countries. (7) The usage of technology and facilities significantly and positively affects mathematical literacy in Brazil. However, this effect is negative in Japan and non-significant in Norway.

This study aimed to examine the role of secondary appraisal of the event, cognitive appraisal of the situation, emotions experienced and coping styles used after a real life stressful event that university students experienced. Five hundred and sixty students (271 females and 289 males) from Middle East Technical University voluntarily participated in the study. A pilot study which consisted of two stages, interviews and survey was conducted before the main study in order to test the appropriateness and applicability of the appraisal and emotion measures. Cognitive Appraisal of the Situation Scale (CASS), Emotions Checklist, Cognitive Appraisal of the Emotion Scale (CAES) and Coping Styles Scale (CSS) were used to assess cognitive appraisals, emotions and coping styles. Stress level, harm/loss and threat appraisals of the stressful events, cognitive appraisal of situation, emotions experienced by the individuals after the stressful event, cognitive appraisal of the emotions and coping strategies used by the participants were the variables used in the structural equation modeling (SEM). The results of the analysis revealed that, problem focused coping was predicted by positive emotions and cognitive iv appraisal of emotion. Emotion focused coping was predicted by negative emotions, stress level and secondary appraisal. The results also yielded that cognitive appraisal of emotion was a moderator variable between positive emotions and problem focused coping. Findings of the research were discussed in the framework of Cognitive Theory of Emotions and Interactional Model of Stress and Coping.