Under de senaste åren har det skett en ekonomisk tillväxt vilket bidragit till att människan konsumerar mer än någonsin. Den ökade konsumtionen har en negativ påverkan på miljön där exempelvis livsmedelsbranschen står för ungefärliga 44-57 procent av de totala växthusutsläppen. Då överkonsumtionen har en negativ påverkan på världen har det blivit allt viktigare att konsumenter blir medvetna om deras konsumtion och dess påverkan på miljön. Forskare menar att konsumenter bör ta till sig ett mer miljöanpassat konsumentbeteende där ett alternativ är att börja konsumera ekologiskt. Tidigare forskare har identifierat att det finns ett attitydgap hos konsumenter gällande ekologisk konsumtion. Attitydgapet innebär att konsumenter uppger sig ha en positiv attityd gentemot att konsumera ekologiska produkter men när de väl ska konsumera väljer de i flesta fall att konsumera konventionella produkter. Varför detta attitydgap existerar har blivit diskuterat av ett flertal forskare. Ett flertal faktorer har blivit identifierade och en gemensam faktor som ett flertal forskare identifierat är informationsbrist (kunskapsbrist). Studier visar att konsumenter möjligtvis inte besitter den kunskap som är nödvändig för att få dem att välja att konsumera ekologiska produkter. En anledning till varför dem möjligtvis inte besitter denna kunskap är då informationen angående innebörden av att konsumera ekologiskt är bristfällig samt att den information som företag använder inte är effektiv. Vår studie har studerat vilken kunskap konsumenter faktiskt besitter gällande KRAVmärkta livsmedelsprodukter, vilket är Sveriges största ekologiskt certifierade märke. Vidare har vår studie studerat om konsumenterna uppfattar att det finns en informationsbrist gällande innebörden av att konsumera KRAV samt vilken sorts information som är mest effektiv för livsmedelsföretagen att använda i deras marknadskommunikation. Studiens resultat visar att respondenterna besitter en relativt låg kunskap gällande KRAV och dess innebörd. Majoriteten av respondenterna uppger korrekta svar i enkätfrågorna men samtidigt uppvisar dem att de flesta känner en stor osäkerhet på om deras angivna svar varit korrekt eller inte. Detta resulterar i att vi författare tolkar att dessa respondenter har en måttlig kunskapsbrist då de inte är säkra på att deras svar varit korrekta. Vidare visar resultatet av vår studie att respondenterna uppfattar att företag kommunicerar innebörden av att konsumera KRAV-märkta livsmedelsprodukter i låg grad. Ytterligare visar studien att den mest effektiva metoden företag inom livsmedelsbranschen bör använda i dess kommunikation av KRAV-märkta livsmedelsprodukter är negativ information. Negativ information innebär att företag använder information i dess marknadskommunikation som triggar konsumenternas negativa känslor. Resultatet av studien visar även att den negativa informationen endast är effektiv att använda om den är ”moderat”, det vill säga måttlig. Om information är extrem visar resultatet att den inte är effektiv att använda för att kommunicera KRAVmärkta livsmedelsprodukter.

Abstract Background: Networks with closed structures may lead to a scarcity of diversified norms which may leave an individual with only negative norms to be influenced by. Trust, relationship quality and social support are also examples of characteristics which may affect the adoption of health behaviors.                                                                                           Aims: To study whether there are any associations between network closure as well as relationship content (trust, relationship quality, social support) and the use of cannabis as well as the frequency of binge drinking, and how these associations are interacted by other factors.  Method: Logistic regression analyses were carried out to calculate the crude and adjusted odds ratios for 19-years old young adults in Sweden (n=2,942). Interaction analyses were also performed.                                                                                                                          Results: Individuals in high closure networks had a higher tendency to binge drink frequently. Individuals that in general are unhealthy, have many smoking friends and who are males had a higher propensity to both use cannabis and to binge drink when included in high closure networks.                                                                                                                      Conclusion: Individuals may be affected negatively by being included in networks with closed structures – some more than other − which is possibly mediated by the types of norms that are available.

Within the health care sector in South Africa, the nursing profession is known as one of the four most stressful work environments, which is characterised by high workload, staff shortages and overcrowding situations. This stressful and emotionally draining environment can be the cause for large numbers of nurses experiencing symptoms of burnout and negative work-home interference. However, there seems to be a lack of research investigating specific job demands and job resources associated with burnout and negative work-home interaction in a nursing environment. The first objective of this study was to determine the construct validity and reliability of the adapted Maslach Burnout Inventory - General Survey (MBI-GS). The second objective was to determine which job characteristics within the nursing environment predict burnout and negative work-home interference (WHI). The last objective was to determine whether negative WHI mediated between the most prominent job characteristics and burnout within the nursing environment and whether it was a partial or full mediating effect. A cross-sectional survey design was used. Random samples (n = 300) were taken from nurses working in the Johannesburg, Klerksdorp, Krugersdorp, Pretoria and Potchefstroom areas. A job characteristics questionnaire, the 'Survey Work-Home Interaction - Nijmegen' (SWING) and an adapted version of the Maslach Burnout Inventory - General Survey were administered. Cronbach alpha coefficients, exploratory factor analysis, Pearson product moment correlations, multiple regression analysis and structural equation modelling were used to analyse the data. Regarding the first objective, it was found that burnout consists of exhaustion and mental distance, whereas cynicism and depersonalisation collapse into one dimension (e.g. mental distance). Regarding the second objective, the results indicated that the most prominent job demands and job resources associated with exhaustion are pressure, autonomy, role clarity, colleague support and financial support. It seemed that mental distance is primarily predicted by role clarity, colleague support and financial support, while negative work-home interference is predicted by pressure, time demands, role clarity and colleague support. Results obtained for the last objective provided evidence for a partial mediating role of negative WHI in the relationship between the most prominent job characteristics (pressure, role clarity and colleague support) and burnout (consisting of exhaustion and mental distance). Recommendations were made for the organisation and for future research. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2006.

In the last few years, many more women than before have entered the labour force. Consequently, employed women are confronted with demanding aspects at work and at home and experience difficulty in combining obligations in both of these domains. The pressure of the demands in their work place and family lives combined with managing the responsibilities from their work and personal lives can have a negative impact on the health of employed females. The objective of this research was to investigate the effects of work characteristics, borne characteristics and negative work-home interaction on the ill-health of employed females in South Africa. An availability sample (N = 500) was taken from six provinces of South Africa, including the Eastern Cape, the Free State, Gauteng, KwaZulu Natal, the North West and Western Cape. A job characteristics questionnaire, a home characteristics questionnaire, the 'Survey Work-Home Interaction Nijmegen' (SWING), and an ill health questionnaire were administered. Exploratory factor analyses were used to determine the construct validity of the questionnaires, Cronbach alpha coefficients were used to determine the reliability, while multiple regression analyses were used to identify significant predictors of ill-health. The results indicated that physical ill health could be predicted by a lack of role clarity and pressures at home. Predictors of anxiety were work overload, a lack of support from colleagues, uncertain roles in the workplace, home pressure as well as negative Work-home interaction (WHI) and negative Home-work interaction (HWI). Fatigue was predicted by work pressure, work overload, a lack of autonomy at work, a lack of instrumental support at work, a lack of role clarity, pressure at home and negative WHI. Predicting factors of depression were found to be job insecurity, a lack of autonomy and clearly defined roles at work, pressure at home, a lack of autonomy at home as well as negative HWI. / Mini-dissertation (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2007.

Nurses make up the largest group of health workers in South Africa and are likely to play an important role in the transformation of the health sector. Health caregivers, especially those dealing with people suffering h m serious illnesses and those exposed to multiple deaths, are at risk of developing work-related psychological disorders. Furthermore, long working hours, pressure, role clarity and lack of support from colleagues are the four most common work stressors reported. People are constantly faced with the challenge of simultaneously managing multiple roles in their work as well as their home-sphere. It therefore becomes increasingly important to maintain a balance in these two life spheres. Unfortunately, a gap exists between the positive and negative side of work-home interaction as most research focuses on the negative side. It also seems that, despite the importance of work-home interaction of nurses, relatively few studies investigate the role of specific job characteristics and coping strategies that could play a role in negative and positive work-home interaction. The objective of this study was to determine which job characteristics and coping strategies predict negative and positive work-home interaction in the nursing environment. A cross-sectional survey design was used. Stratified random samples (n = 300) were taken of registered nurses in the Johannesburg, Klerksdorp, Krugersdorp, Potchefstroom and Pretoria regions. A self-constructed questionnaire was used to measure job characteristics. The Coping Strategy Indicator (CSI) was used to measure coping strategies, and the 'Survey Work-home Interaction- NijmeGen' (SWING) was used to measure work-home interaction. Exploratory factor analyses and Cronbach alpha coefficients were used to determine the validity and reliability of the questionnaires. Product-moment correlation coefficients were used to determine the relationship between job characteristics, coping and work-home interaction. Multiple regression analyses were used to determine the percentage variance in the dependent variables (e.g. negative and positive WHI) that is predicted by the independent variables (e.g. job characteristics and coping strategies). The results showed that time demands, pressure, role clarity and colleague support are the main job characteristics that predict negative work-home interference. Problem-solving coping was associated with less negative work-home interference, while avoidance coping seems to predict higher levels of negative work-home interference. Time demands, autonomy and role clarity were the main predictors of positive work-home interference. Problem-solving coping was the only coping strategy associated with positive work-home interference. Recommendations were made for further research. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2007

Previous studies have established that for some people a typical day at work starts with immense feelings of distress, anxiety and irritability caused by workplace bullying. Not only does bullying behaviour in the workplace have a negative impact on a person’s professional life, but it is also detrimental to the effectiveness of the organisation. A survey focussing on the perceived exposure to bullying and victimisation in the workplace was administered to a sample of 159 employees employed by a mine in Mpumalanga. The results uncovered that more than a quarter of the participants reported that they had experienced workplace bullying. The study also discovered that line managers experienced more negative acts than senior managers. While those who only experience a brief spell of bullying behaviour at work survive their experience relatively unscathed, previous studies have also indicated that others are affected in a significant physical and psychological way. In conclusion this study determined that workplace bullying is an actual occurrence, not only internationally but also in South Africa. Employees and employers can therefore only benefit from understanding this unique workplace phenomenon. This article provides the opportunity for employed people to recognise the nature and prevalence of workplace bullying in order to prevent it from becoming a silent epidemic. Researchers generally accept that bullying is behaviour that is aggressive or negative and carried out repeatedly. Previous research established that bullying can occur in any context where people interact. This article open by synthesising a conceptual framework of negative acts as an interactive form of organisational behaviour from the available literature. Empirical research was done in order to investigate the prevalence of negative acts. The study found that more than a quarter of the participants had experienced bullying at some stage during their career with managers and supervisors predominantly reported as the perpetrators. The study also found that behaviour that tends to isolate individuals was generally reported as the most frequently experienced form of negative acts. By understanding workplace bullying both employers will be able to implement influence strategies aimed at dealing with this workplace phenomenon at levels of protection, intervention and dispute resolution. In conclusion it has been established that workplace bullying is not only a real problem in international workplaces, but also in South Africa. This means that employers not only have to cope with the consequences of employees performing badly but also behaving badly. This article presents an opportunity to understand negative behaviour in the workplace. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2012

The work environment in which South African employees have to function in is highly demanding, offering them little in terms of job security, but simultaneously expecting them to give more in terms of inter alia flexibility, competency, and effort. Tracking and addressing government employees' functioning in areas that could affect their wellness and consequent standard of service is essential. Job insecurity, affectivity, burnout and work engagement are specific focus areas in this research. It is important to use reliable and valid measuring instruments to measure these constructs. It appears that job insecurity may affect employees' levels of burnout and work engagement and that affectivity may also influence the stress outcome relationship. A lack of South African research exists regarding job insecurity and wellness of employees, hence the importance of this research. The objectives of this study were to investigate the relationship between job insecurity, affectivity, burnout, and work engagement of employees (N = 297) in a government organisation. A cross-sectional survey design was used. Constructs were measured by means of the Job Insecurity Inventory (JII), the Affectometer 2 (AFM 2), the Oldenburg Burnout Inventory (OLBI) and the Utrecht Work Engagement Scale (UWES). The research method for each of the three articles consists of a brief literature review and an empirical study. Exploratory factor analyses, as well as Cronbach's alphas were computed to assess the reliability and validity of the OLBI, UWES and AFM 2. Structural equation modeling was used to assess the construct validity of the JII, while alpha coefficients were computed to assess the internal consistency of its scales. Descriptive statistics were used to analyse data and Pearson product moment correlation coefficients, as well as regression analyses were used to examine the relationships between the constructs employed in this research. Structural equation modeling results confirmed the two-factor structure of the JII, consisting of an affective and cognitive dimension, although a one-factor model also resulted in a good, but not superior fit. Exploratory factor analyses of the OLBI resulted in a two-factor model of burnout, consisting of exhaustion disengagement and engagement subscale and the UWES resulted in a one-factor model of engagement. Exploratory factor analyses of the AFM 2 resulted in a two-factor model, consisting of a negative and positive affect scale. All scales used in this research demonstrated adequate internal consistencies. It was found that white participants experience higher levels of cognitive job insecurity and lower levels of engagement (OLBI) compared to black participants. Shorter tenure was associated with increased engagement (OLBI). It was furthermore found that participants who had been working in the organisation for less than one year and those who worked for two to five years demonstrated higher levels of positive affect compared to employees who had been working in the organisation for 11 years and longer. Regarding negative affect, it was established that participants with tenure less than one year presented lower negative affect levels compared to participants who had been employed in the organisation for longer. Job insecurity and burnout were found to be statistically significantly correlated. Cognitive and affective job insecurity demonstrated a practically significant relationship with work engagement. Positive and negative affectivity showed a practically significant correlation with both the affective and cognitive job insecurity scales and work engagement. Positive affectivity partially mediated the relationship between cognitive job insecurity and exhaustion disengagement. Furthermore, both positive and negative affectivity partially mediated the relationship between cognitive job insecurity and work engagement. Conclusions are made, limitations of the current research are discussed and recommendations for future research are put forward. / Thesis (Ph.D. (Industrial Psychology))--North-West University, Vaal Triangle Campus, 2005.

This thesis examines banking efficiency and the productivity of thirteen transition Central and Eastern European banking systems during 1998-2003 using Data Envelopment Analysis (DEA). It proposes a non-parametric methodology for non-radial Russell output efficiency measure of banking firms, incorporating risk as an undesirable output. In addition, the proposed efficiency measure handles unrestricted data, i. e. both positive and negative. The Luenberger productivity index is suggested, which is applicable to technology where the desirable and undesirable outputs are jointly produced, and are possibly negative. Furthermore, the thesis addresses the main issue in the literature on banking performance measurement, which concerns the lack of consistency in the conceptual and theoretical considerations in describing the banking production process. Consequently, a metaanalysis tool, to examine the choice of inputs and outputs definitions in the banking efficiency literature, is suggested. In addition, the performance measures are estimated using three alternative definitions of the banking production process focusing on the risk and environmental dimensions of bank efficiency and productivity, with further comparative analysis using bootstrapping and kernel density techniques. Overall, the empirical results suggest that in Central and Eastern Europe Czech, Hungarian and Polish banks were the most technical efficient banks and the banking risk was mainly affected by external environmental factors during the analyzed period. Productivity analysis implies that the main driver of productivity change in the Central and Eastern European banks is the technological improvement. As meta-analysis revealed, the choice of particular approach of describing the banking production process is determined not by the availability of particular input or output variable information but the concepts of researcher's theoretical considerations. Statistical tests and density analysis indicate that efficiency scores, returns parameters and productivity indexes are sensitive to the choice of particular approaches.

A new adaptive learning Artificial Immune System (AIS) based committee machine is developed in this thesis. The new proposed approach efficiently tackles the general problem of clustering high-dimensional data. In addition, it helps on deriving useful decision and results related to other application domains such classification and prediction. Artificial Immune System (AIS) is a branch of computational intelligence field inspired by the biological immune system, and has gained increasing interest among researchers in the development of immune-based models and techniques to solve diverse complex computational or engineering problems. This work presents some applications of AIS techniques to health problems, and a thorough survey of existing AIS models and algorithms. The main focus of this research is devoted to building an ensemble model integrating different AIS techniques (i.e. Artificial Immune Networks, Clonal Selection, and Negative Selection) for classification applications to achieve better classification results. A new AIS-based ensemble architecture with adaptive learning features is proposed by integrating different learning and adaptation techniques to overcome individual limitations and to achieve synergetic effects through the combination of these techniques. Various techniques related to the design and enhancements of the new adaptive learning architecture are studied, including a neuro-fuzzy based detector and an optimizer using particle swarm optimization method to achieve enhanced classification performance. An evaluation study was conducted to show the performance of the new proposed adaptive learning ensemble and to compare it to alternative combining techniques. Several experiments are presented using different medical datasets for the classification problem and findings and outcomes are discussed. The new adaptive learning architecture improves the accuracy of the ensemble. Moreover, there is an improvement over the existing aggregation techniques. The outcomes, assumptions and limitations of the proposed methods with its implications for further research in this area draw this research to its conclusion.

Psychological and behavioral characteristics of female undergraduates with varying levels of disordered eating, as measured by the Questionnaire for Eating Disorder Diagnoses (Q-EDD; Mintz, O'Halloran, Mulholland, & Schneider, 1997), were investigated. Results suggest that the Q-EDD is an appropriate instrument for measuring eating disorder symptomatology. Greater disordered eating was associated with more bulimic, dieting, and weight fluctuation symptoms, higher impression management and approval-seeking needs, more dichotomous thinking, self control, and rigid weight regulation, and increased concern with body shape and dissatisfaction with facial features. Eating-disordered and symptomatic women evidenced more severe eating disorder behaviors and psychological distress than asymptomatic women. Findings are congruent with a redefined discontinuity perspective of eating disorder symptomatology. Treatment implications and campus-wide preventions are suggested.