Research has shown that social correlates of physical activity play an important role in individual participation in physical activity or sport, hence their link with associated health benefits. However, in spite of the health benefits associated with physical activity, many children do not meet the daily guidelines of being active for at least 30 minutes a day. This study investigated physical activity, health-related fitness and social correlates among 284 adolescents (111 boys and 173 girls) who are part of the on-going Physical Activity and Health Longitudinal Study (PAHLS). Height, weight, skinfold thickness (triceps, subscapular and calf skinfolds), waist and hip circumferences were measured through the standard procedures described by the International Standards of Advancement of Kinanthropometry (ISAK). Body mass index (BMI), waist-to-hip ratio (WHR) and percentage body fat (%BF) were used as measures of body composition. Health-related physical fitness (HRPF) was determined by measuring cardiorespiratory endurance, muscle strength and endurance, and flexibility using standardised tests according to the EUROFIT (1988) test protocol. The standardised International Physical Activity Questionnaire (IPAQ-Short form) and Social Support for Physical Activity questionnaire were used to gather information on participation in physical activity and social correlates for physical activity respectively. The results show that 29.6% of the adolescents were underweight and 26.4% overweight. Girls were significantly (p<0.05) fatter (%BF and BMI) and shorter than the boys. A significant gender difference (p<0.05) was also observed in WHR. Thirty four percent (34%) participated in low PA with 35% in high PA. Boys were significantly (z-4.52; p=0.000) more highly active compared to the girls. Boys measured significantly higher than girls (p<0.05) in SBJ, BAH, SUP, predicted 2max • V O . Adolescents’ participation in physical activity was affected by ‘lack of support by friends’, ‘encouragement by friends or family members’ and ‘lack of support during engagement in physical activity’. A significant difference (p<0.05) was found between boys and girls regarding ‘friends’ encouragement to do physical activity or sports’, ‘participation in physical activity or sports with friends’ and ‘friends’ confirmation that the participant is doing a good job at physical activity’. Positive correlations were found between Total Physical Activity (TPA) and all social correlates of PA, with a significant relationship between total physical activity (TPA) and ‘how often do your friends tell you that you are doing a good job at physical activity?’, and ‘has someone told you that you are doing well in physical activity?’ percentage body fat was negatively associated with social correlates of physical activity with a significant relationship in contrast with ‘friends’ encouragement that one is doing a good job at physical activity’. A significant positive correlation was observed between WC, WHR, SBJ, SUP, predicted 2max • V O and ‘friends’ encouragement in a typical week to do physical activity or sports’. Further significant positive correlations were found with WC for ‘encouragement by someone in a typical week to do physical activity or sports’; WHR, SBJ, BAH, SUP, predicted 2max • V O for ‘participation in physical activity or sports with friends’; SBJ, SUP, predicted 2max • V O for ‘friends’ encouragement that one is doing a good job at physical activity’; SBJ, SUP, predicted 2max • V O for ‘someone’s encouragement that one is doing a good job at physical activity’; BAH, SUP, predicted 2max • VO for ‘someone’s participation in sport with one’; SUP, predicted 2max • VO for ‘one’s encouragement to friends to participate in physical activity or sport’; SUP for ‘provision of transportation to physical activity or sport’; and predicted 2max • V O for ‘someone watching one participate in physical activity or sport’. SAR, on the other hand, was negatively associated with all social correlates for physical activity. It can be concluded that the adolescent boys in the study were underweight and significantly more active when compared to the relatively overweight and inactive girls. Boys also have higher health-related fitness and higher social correlates compared to the girls. Social correlates for physical activity were positively associated with participation in physical activity and healthrelated physical fitness variables. Thirty six percent (36%) of the participants indicated lack of transport as a negative factor for their participation in physical activity and sport. Based on these findings, urgent strategic public health intervention by all stakeholders dealing with adolescents, as well as more research studies in the area, is required. / PhD (Human Movement Science), North-West University, Potchefstroom Campus, 2015

Research has shown that social correlates of physical activity play an important role in individual participation in physical activity or sport, hence their link with associated health benefits. However, in spite of the health benefits associated with physical activity, many children do not meet the daily guidelines of being active for at least 30 minutes a day. This study investigated physical activity, health-related fitness and social correlates among 284 adolescents (111 boys and 173 girls) who are part of the on-going Physical Activity and Health Longitudinal Study (PAHLS). Height, weight, skinfold thickness (triceps, subscapular and calf skinfolds), waist and hip circumferences were measured through the standard procedures described by the International Standards of Advancement of Kinanthropometry (ISAK). Body mass index (BMI), waist-to-hip ratio (WHR) and percentage body fat (%BF) were used as measures of body composition. Health-related physical fitness (HRPF) was determined by measuring cardiorespiratory endurance, muscle strength and endurance, and flexibility using standardised tests according to the EUROFIT (1988) test protocol. The standardised International Physical Activity Questionnaire (IPAQ-Short form) and Social Support for Physical Activity questionnaire were used to gather information on participation in physical activity and social correlates for physical activity respectively. The results show that 29.6% of the adolescents were underweight and 26.4% overweight. Girls were significantly (p<0.05) fatter (%BF and BMI) and shorter than the boys. A significant gender difference (p<0.05) was also observed in WHR. Thirty four percent (34%) participated in low PA with 35% in high PA. Boys were significantly (z-4.52; p=0.000) more highly active compared to the girls. Boys measured significantly higher than girls (p<0.05) in SBJ, BAH, SUP, predicted 2max • V O . Adolescents’ participation in physical activity was affected by ‘lack of support by friends’, ‘encouragement by friends or family members’ and ‘lack of support during engagement in physical activity’. A significant difference (p<0.05) was found between boys and girls regarding ‘friends’ encouragement to do physical activity or sports’, ‘participation in physical activity or sports with friends’ and ‘friends’ confirmation that the participant is doing a good job at physical activity’. Positive correlations were found between Total Physical Activity (TPA) and all social correlates of PA, with a significant relationship between total physical activity (TPA) and ‘how often do your friends tell you that you are doing a good job at physical activity?’, and ‘has someone told you that you are doing well in physical activity?’ percentage body fat was negatively associated with social correlates of physical activity with a significant relationship in contrast with ‘friends’ encouragement that one is doing a good job at physical activity’. A significant positive correlation was observed between WC, WHR, SBJ, SUP, predicted 2max • V O and ‘friends’ encouragement in a typical week to do physical activity or sports’. Further significant positive correlations were found with WC for ‘encouragement by someone in a typical week to do physical activity or sports’; WHR, SBJ, BAH, SUP, predicted 2max • V O for ‘participation in physical activity or sports with friends’; SBJ, SUP, predicted 2max • V O for ‘friends’ encouragement that one is doing a good job at physical activity’; SBJ, SUP, predicted 2max • V O for ‘someone’s encouragement that one is doing a good job at physical activity’; BAH, SUP, predicted 2max • VO for ‘someone’s participation in sport with one’; SUP, predicted 2max • VO for ‘one’s encouragement to friends to participate in physical activity or sport’; SUP for ‘provision of transportation to physical activity or sport’; and predicted 2max • V O for ‘someone watching one participate in physical activity or sport’. SAR, on the other hand, was negatively associated with all social correlates for physical activity. It can be concluded that the adolescent boys in the study were underweight and significantly more active when compared to the relatively overweight and inactive girls. Boys also have higher health-related fitness and higher social correlates compared to the girls. Social correlates for physical activity were positively associated with participation in physical activity and healthrelated physical fitness variables. Thirty six percent (36%) of the participants indicated lack of transport as a negative factor for their participation in physical activity and sport. Based on these findings, urgent strategic public health intervention by all stakeholders dealing with adolescents, as well as more research studies in the area, is required. / PhD (Human Movement Science), North-West University, Potchefstroom Campus, 2015

The emergence of obesity as a distinct disease could have far reaching consequences for an organisation where optimum health and physical fitness are required for personnel to perform their occupational roles effectively. The aim of this thesis is to increase our understanding of the prevalence, correlates and predictors of obesity in the British Army. Systematic review indicated a smaller body of knowledge in respect of the treatment and correlates of obesity in military populations. Successful treatment interventions incorporated exercise, healthy eating information, behavioural modification, self-monitoring, relapse prevention, structured follow-up and were supported by trained personnel. The major significant correlates of obesity were being enlisted personnel, male, ≥35 years of age, African-American/Hispanic ethnicity, and married (with spouse present). The review highlighted the deficit in knowledge concerning treatment, and correlates of obesity in military populations. The trend of escalating obesity has prompted some armed forces to report obesity trends and prevalence, the findings of which suggest that obesity is a growing concern in the armed services. A study based on the secondary analysis of data covering 50,000 British Army soldiers indicated that according to BMI, 56.7% of the study population were overweight and of those individuals 12% were obese. When waist circumference data were added to the BMI data, the results indicate that females displayed a higher percentage of risk of obesity related ill-health (a combination of BMI and waist circumference) than males (30.4% and 24% respectively). Further analysis suggested that age, marital status, rank and military employment category were significant correlates of obesity. Additionally, obesity and increased risk of obesity related-ill-health were linked to higher failure and lower attendance on British Army physical tests. Data suggested older army personnel (>30) had a higher pass rate, but a lower attendance rate. The final analysis of all available variables suggested physical test outcome, age, medical status and enlisted status were the most significant predictors of obesity. A final study based on a different study population (n=1124) from the high readiness component of the UK based British Army sought to identify relationships between health behaviours that were not supportive of healthy weight and to understand the predictive influence of individual and collective behaviour in relation to obesity and the risk of obesity related ill-health in military personnel. The investigation used a health behaviour questionnaire to assess health behaviours that might influence weight status. Final analysis of this highly active population suggested, restrained eating, food preparation in the working week, injury status, age, sedentary behaviour, leisure-time physical activity engagement and type of motivation for exercise were the most significant factors. This thesis highlights the lack of knowledge, and gives evidence to support the impact of obesity on individual health and collective occupational capability. Obesity is a complex multifaceted disease where no single causal route predominates. However, the identification of potential causal and predictive relationships will aid in the prevention and treatment of obesity in the British Army.

Recently, with the development of new technology, researchers have focused on physiological predictors of aggressive behavior, specifically cortisol and alpha amylase. Gordis, Granger, Susman, and Trickett (2006) found the interaction between cortisol and alpha-amylase significantly predicted parent reports of aggression indicating that low levels of physiological reactivity was associated with higher levels of problem behavior. While this research has provided valuable information about aggressive behavior, a major limitation is the majority of research focuses on males, or has not examined gender differences explicitly. This study expanded on work by Gordis et al. (2006) and other researchers on the HPA axis and sympathetic nervous system responses and aggression by using a larger sample, focusing on female adolescents, examining both physical and relational aggression, and utilizing parent and adolescent reports of aggressive behavior. Based on prior literature, I expected that lower levels of salivary cortisol taken at the beginning of the interview and the beginning of the stress task would be associated with higher levels of physical and relational aggression in girls. I also hypothesized that lower levels of cortisol and α-amylase reactivity will be associated with higher levels of physical and relational aggression. Finally, I hypothesized that lower levels of cortisol reactivity coupled with higher levels of α-amylase reactivity will be associated with lower levels of aggressive behavior. Participants in the current study live in moderate- to high-violence areas in Richmond, VA. Participants were 146 adolescent females who were enrolled in a larger longitudinal study on coping with exposure to violence. Most of the adolescents were African-American (91.1%) with a mean age of 13.9 years old (range from 11-17). The changes in physiological responses were monitored during the interview process which included the administration of the Social Competence Interview (SCI). Aggression was measured using the Child Behavior Checklist and Problem Behavior Frequency Scales. In the analyses, I controlled for pubertal status, medication usage, race, and time of day which are all factors that can influence the level of cortisol and alpha-amylase. Results indicated that higher levels of basal cortisol were associated with higher levels of aggressive behavior. In contrast to previous research and prediction, results indicated that symmetry in α-amylase and cortisol predicted lower levels of self-reported physical aggression in girls. Asymmetry in the two systems was associated with higher levels of self-reported physical aggression. These results contribute to the mixed results on female physiological responses and aggression. It also provides support for symmetry in cortisol and α-amylase as a predictor of lower levels of aggressive behavior. Studying a child’s physiological reactions to stress can give insight into behavior regulation, help identify adolescents for prevention/intervention, and serve as markers of treatment progress. These data suggest that physiological associations with aggression may not be the same for males and females, or for youth living in extremely stressful circumstances. Further research is needed to replicate these finding, and specifically to compare these patterns of associations across gender.

The purpose of this study Has to determine attitudes toward the oral contraceptive as related to religious, regional, educational, age, sex, and marital status. The instrument utilized was a 30 item summated scale which was completed by 240 high school and college students from the Intermountain and Great Plains regions. The findings indicated a very large range or opinion regarding the pill. Attitudes were found to be related to religion, region, educational attainment, and marital status. Age and sex were not related to attitudes toward the pi11.

Cognitive theories of depression have long posited automatic interpretation biases (AIB) as a central contributor to depressed mood. The current study was first to examine AIB in a clinically defined depressed sample. While assessing AIB using a semantic association paradigm, pupillary reactivity was simultaneously recorded to build insight into the AIB process. A total of 53 individuals (25 depressed and 28 healthy control) completed the Word Sentence Association Paradigm for Depression (WSAP-D) while pupillary reactivity was recorded. Results revealed the depressed group was significantly more likely to endorse negative AIB and less likely to endorse benign AIB compared to healthy controls. The depressed group demonstrated a modest effect size difference indicating they were faster to endorse negative AIB compared to the healthy controls, but did not differ in endorsing benign AIB or in rejecting either valence. Pupillary reactivity was found to differentiate behaviorally defined AIB type from a natural processing condition when counter to theorized, group relevant AIB. The depressed group demonstrated greater initial pupillary constriction during initial presentation of ambiguous information and comparatively less pupillary dilation during and after endorsing a benign AIB. Taken together, the results suggest that theorized negative AIB and lack of benign AIB are characteristic of depression, that greater cognitive effort is required to reject interpretations consistent with theorized biases consistent with reinterpretation processes, and that depressed individuals are less engaged with benign AIB compared to healthy controls, possibly associated with hedonic deficits. Theoretical implications and future directions are discussed.

Although mental disorders are common among children all over the world, information on the extent and types of child psychiatric disorders in Ethiopia is extremely limited. A study was conducted in an urban setting of Ethiopia to look at the prevalence of child psychiatric disorders and their correlates. A two-phase survey was performed. In the first phase, parents of 5000 children in Addis Ababa, the capital city of Ethiopia, were interviewed using the Reporting Questionnaire for Children (RQC). In the second phase, parents of all screen-positive children (n=864) and parents of 1537 screen-negative children were interviewed using the revised parent version of the Diagnostic Interview for Children and Adolescents (DICA-R), a semi-structured diagnostic instrument that is based on the third revised edition of the Diagnostic and Statistical Manual of the American Psychiatric Association (DSM-III-R). This thesis discusses the results of that study in comparison with other child mental health studies in Ethiopia and elsewhere. At the recommended cut-off score of 1, the sensitivity, specificity, predictive values and likelihood ratios of the RQC to DICA-R diagnoses were acceptable. The RQC had high accuracy with a misclassification rate of 17%. The weighted prevalence for any DSM-III-R diagnosis was 17%. The most prevalent condition was enuresis (12.1%) followed by simple phobia (5.5%). The prevalence rates of all other identified conditions were below 1%. Children's age, severe economic problems, and single parenthood were found to be risk factors for any DSM-III-R diagnosis in children. Male sex, younger age, and lower achieved educational grade of the child were all independently associated with childhood enuresis. The odds of having enuresis were significantly higher for children in families with extreme poverty and in children from single-parent homes. The risk of having enuresis was significantly higher in children who had anxiety disorders (AD) and disruptive behaviour disorders (DBD). Sex was significantly associated with disruptive behaviour disorders while grade level, age, family size, ethnicity, poverty, and single parenthood were not. Anxiety disorders were significantly associated with sex, ethnicity, and extreme poverty but not with the other socio-demographic variables. The absence of mood disorders and somatoform disorders, of which symptoms are often encountered in both children and adults at clinical settings and the low prevalence rates of most identified conditions, were probably related to the lack of awareness or alternative explanations at the community level regarding the understanding of behaviour changes. Campaigns of public mental health education with the aim of providing scientific information to society are highly recommended. While Ethiopia works towards mainstreaming mental health into its health care system, training health care workers in applying simple screening tools like the RQC is recommended.

No description available.

While significant research has been done on dyslexia with native English speakers, little is known about identifying dyslexia in English Language Learners (ELLs). Previous research, primarily involving monolingual native English speakers, has highlighted specific cognitive correlates of reading that help screen students with dyslexia at an early age. These cognitive correlates, which include Phonological Awareness (PA), Rapid Automatized Naming (RAN), and Processing Speed (PS), have consistently been linked to basic reading skills in English and other languages. The present study had many objectives that could provide guidance for practitioners working with ELLs. First it explored the value of PA, RAN, and PS as predictors of basic reading skills in Spanish speaking ELLs. Second, it investigated a model that combined tasks of PA, RAN and PS that had the highest correlations to aspects of reading. Third, it explored the role of Vocabulary (V) in both English and Spanish in the development of reading skills in ELLs. Fourth, it aimed at establishing the use of the Simple View of Reading (SVR; Gough & Tunmer, 1986), which postulates that reading is the product of decoding and listening comprehension skills, for the assessment of reading in ELLs. Finally, it incorporated findings from this study for an adaptation of the SVR for use with ELLs. Findings suggest that RAN, PA, and PS, as measured in this study, are highly correlated to basic reading skills in Spanish speaking ELLs, and that these can be used for the assessment of reading and dyslexia in this population. This study also demonstrated that a model that included RAN numbers and phoneme deletion in English can accurately predict reading performance. Findings also indicate that V in English is highly correlated to basic reading skills in English, and that the model of the SVR can be replicated with the population sampled in this study. Finally, case study analyses illustrate how a model similar to the SVR, which incorporates RAN and PS, as well as V, can be used for the assessment of reading and dyslexia in ELLs.

No description available.