Work stress has a substantial impact on employees, organisations and economies; especially in the fragile economic environment since the ‘Great Recession’ of 2008; which has seen employment levels drop and employees willing to endure more stress at work to avoid retrenchment. These impacts include serious health and financial consequences. Attempts should therefore be made to effectively manage and address work stress to lessen these dire consequences. Many models have been developed and theorised to assist in explaining work stress, the pinnacle of these being the job demands-resources (JD-R) model. In JD-R theory, the dual process explains that work-related well-being follows the following processes: An energetic, also called the health impairment process, in which job demands leads to ill health outcomes through burnout; and then a motivational process which presents that job resources leads to positive organisational outcomes, e.g. organisational commitment, through engagement. The main objectives of this research were 1) to investigate a JD-R model in a large South African sample with a categorical estimator; 2) to investigate the reversed causal hypotheses of burnout and engagement in job demands-resources theory over time; 3) to investigate the likelihood of reporting treatment for health conditions based on burnout and engagement, and 4) to investigate the link between burnout and objective financial outcomes, i.e. by medical aid provider expenditure. To achieve the first objective a cross-sectional design was used (n = 15 633) covering numerous sectors in South Africa. A dual process model was specified with job demands (work overload) leading to ill health through burnout, and job resources (colleague and supervisor support, communication, growth opportunities and role clarity) leading to organisational commitment through engagement. Results of structural equation modelling indicated that the proposed JD-R model was a good fit to the sample. Furthermore, burnout was found to mediate the relationship between job demands and ill health with a medium effect. Engagement was found to mediate the relationship between job resources and organisational commitment with a large effect. The second objective, concerning reversed causality, was achieved with a longitudinal design (n = 593). The hypothesized model included burnout and engagement at time one, and at time two work overload as indicator of job demands, and colleague and supervisor support, communication, growth opportunities and role clarity as indicators of job resources. Results indicated that burnout had a significant negative reversed causal effect to supervisor support and colleague support. Engagement showed only one significant result, i.e. a small negative reversed causal relationship with supervisor support. To achieve the third objective, a cross-sectional design was used (n = 7 895). Results for logistic regression analyses showed that an increase in burnout was associated with a significant increase in the estimated odds for reporting an affirmative answer for receiving treatment for any of the health conditions, i.e. cardiovascular conditions, cholesterol, depression, diabetes, hypertension and irritable bowel syndrome. In contrast, an increase in engagement was associated with a decrease in affirmative reporting for cardiovascular conditions, cholesterol and depression; but not for diabetes, hypertension or irritable bowel syndrome. Addressing the link between burnout and financial outcomes was the fourth objective; and met with a cross-sectional design (n = 3 182). Participants were divided into a high and low burnout group based on the comorbidity of exhaustion and cynicism Analysis of covariance (ANCOVA) was implemented, controlling for age and gender, to investigate the difference in medical aid provider expenditure of the two groups. Results revealed that expenditure in the high burnout group was consistently more in all cases, compared to the low burnout group. By way of conclusion, the implications of the research were discussed and recommendations for managers and for future research were made. / Thesis (PhD (Industrial Psychology))--North-West University, Potchefstroom Campus, 2013

Depression is one of the most debilitating, widespread and costly health problems worldwide and has a high prevalence in almost every society. Research suggests that depression affects an individual‟s work engagement levels, burnout levels and the occurrence of stress-related ill health symptoms. However, it is unclear whether these findings would differ among individuals who reported that they suffer from depression and receive medical treatment for it, individuals who reported that they are unsure whether they suffer from depression, and individuals who reported that they do not suffer from depression. This study is quantitative in nature and a cross-sectional design was used. The study population consisted of 15 664 participants from several sectors in South Africa. The participants also differed in terms of gender, age, race, marital status, educational level, language and the province where they reside. The sample population was thus representative of the diverse population of South Africa. The SAEHWS, a self-report instrument based on the dual-process model of work-related well-being, was used to measure all constructs. The participants were divided into three groups, i.e. individuals who reported that they suffer from depression and are currently receiving medical treatment for depression, individuals who reported that they are uncertain whether they suffer from depression, and individuals who reported that they do not suffer from depression. Frequencies were used to determine the prevalence of depression in the three different groups and MANOVA (multivariate analysis of variance) was used to determine the significance of differences between the levels of work engagement, burnout and stress-related ill health symptoms of the three different groups (individuals who reported that they suffer from depression, individuals who reported that they are uncertain whether they suffer from depression, and those who reported that they do not suffer from depression). The results showed that 18,3% of the population reported that they suffer from depression and receive medical treatment for depression, 16,7% of the population reported that they are unsure whether they suffer from depression and 65% reported that they do not suffer from depression. Furthermore, it was found that depression significantly influences work engagement levels negatively and that it significantly influences burnout levels and the occurrence of stress-related ill health symptoms positively. This study will make organisations aware of the effect of depression on an individual‟s well-being and of the fact that depression is a factor to be reckoned with. Employers should consider ways to assist employees who suffer from depression and should learn how to act preventatively to decrease any further occurrence. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2011

Work stress has a substantial impact on employees, organisations and economies; especially in the fragile economic environment since the ‘Great Recession’ of 2008; which has seen employment levels drop and employees willing to endure more stress at work to avoid retrenchment. These impacts include serious health and financial consequences. Attempts should therefore be made to effectively manage and address work stress to lessen these dire consequences. Many models have been developed and theorised to assist in explaining work stress, the pinnacle of these being the job demands-resources (JD-R) model. In JD-R theory, the dual process explains that work-related well-being follows the following processes: An energetic, also called the health impairment process, in which job demands leads to ill health outcomes through burnout; and then a motivational process which presents that job resources leads to positive organisational outcomes, e.g. organisational commitment, through engagement. The main objectives of this research were 1) to investigate a JD-R model in a large South African sample with a categorical estimator; 2) to investigate the reversed causal hypotheses of burnout and engagement in job demands-resources theory over time; 3) to investigate the likelihood of reporting treatment for health conditions based on burnout and engagement, and 4) to investigate the link between burnout and objective financial outcomes, i.e. by medical aid provider expenditure. To achieve the first objective a cross-sectional design was used (n = 15 633) covering numerous sectors in South Africa. A dual process model was specified with job demands (work overload) leading to ill health through burnout, and job resources (colleague and supervisor support, communication, growth opportunities and role clarity) leading to organisational commitment through engagement. Results of structural equation modelling indicated that the proposed JD-R model was a good fit to the sample. Furthermore, burnout was found to mediate the relationship between job demands and ill health with a medium effect. Engagement was found to mediate the relationship between job resources and organisational commitment with a large effect. The second objective, concerning reversed causality, was achieved with a longitudinal design (n = 593). The hypothesized model included burnout and engagement at time one, and at time two work overload as indicator of job demands, and colleague and supervisor support, communication, growth opportunities and role clarity as indicators of job resources. Results indicated that burnout had a significant negative reversed causal effect to supervisor support and colleague support. Engagement showed only one significant result, i.e. a small negative reversed causal relationship with supervisor support. To achieve the third objective, a cross-sectional design was used (n = 7 895). Results for logistic regression analyses showed that an increase in burnout was associated with a significant increase in the estimated odds for reporting an affirmative answer for receiving treatment for any of the health conditions, i.e. cardiovascular conditions, cholesterol, depression, diabetes, hypertension and irritable bowel syndrome. In contrast, an increase in engagement was associated with a decrease in affirmative reporting for cardiovascular conditions, cholesterol and depression; but not for diabetes, hypertension or irritable bowel syndrome. Addressing the link between burnout and financial outcomes was the fourth objective; and met with a cross-sectional design (n = 3 182). Participants were divided into a high and low burnout group based on the comorbidity of exhaustion and cynicism Analysis of covariance (ANCOVA) was implemented, controlling for age and gender, to investigate the difference in medical aid provider expenditure of the two groups. Results revealed that expenditure in the high burnout group was consistently more in all cases, compared to the low burnout group. By way of conclusion, the implications of the research were discussed and recommendations for managers and for future research were made. / Thesis (PhD (Industrial Psychology))--North-West University, Potchefstroom Campus, 2013

Variables for the accelerated ageing (AA) test, methods for reducing fungal contamination during the AA test, using the conductivity test as a vigour test, the effect of seed size on seed vigour and the relationship between laboratory test results and field perfonnance in selected Brassica spp were investigated. In the first experiment, three seed lots of turnip rape hybrid (B. rapa x campestris), turnip (B. campestris) and forage rape (B. napus); and seven seed lots of Asian rape (B. napus), six seed lots of Asian kale (B. oleraceae var. alboglabra L.) and five seed lots of choisum (B. rapa var. pekinensis) with germinations above 90% were aged at two different temperatures (41 and 42°C ± 0.3°C) and three ageing times (24, 48 and 72 ± 15 minutes). The second experiment was divided into three sections. In the first, the same seed lots and species were aged at one temperature (41°C) and time (72 h), but either 40 ml of saturated salts; KCl (83%RH), NaCl (76%RH), NaBr (55%RH); or distilled water (96%RH) were used as the ageing solutions. In the second, one turnip rape hyprid seed lot was aged at three temperatures (41, 42 and 45°C) and two times (72 and 96h), again using the three saturated salts and distilled water as ageing solutions. In the third, three turnip rape hybrid seed lots and three Asian kale seed lots were surface sterilised (1 % sodium hypochlorite) prior to ageing at one temperature (41°C) and time (72 h). In the third experiment, the same species and seed lots used in experiment one at their original seed moisture content (SMC) were tested for conductivity after soaking in deionised water for 4, 8, 12, 16, 20 and 24 h. They were then re-tested after the SMC had been adjusted to 8.5%. In the fourth experiment, three seed lots of forage rape and three seed lots of Asian kale were graded into three seed size categories; large (retained on a 2.0 mm screen), medium (retained on a 1.7 mm screen) and small (passed through a 1.7 mm screen). Graded seeds were then tested for standard germination, AA (41°C/48 h) and conductivity (measured at 16 and 24 h). In the final experiment, the relationships between laboratory tests for the six species (each consisting of three seed lots), field emergence from three sowings, and cold room emergence were evaluated. Both time and temperature influenced post-AA germination. Increasing the ageing period from 48 to 72 hours at 41°C, and 24 to 48 hours at 42°C resulted in decreased mean germination percentage for all species but not always clear separation of seed lots. While there were sometimes few differences between ageing at 41°C and 42°C, the former is preferred because it is already the temperature used for other species. For Asian rape, choisum and turnip, the previously recommended testing conditions of 41°C/72 h provided good seed lot separation, but for Asian kale and turnip rape hybrid, AA testing at 41°C/48 h provided better results. Seed moisture content after ageing ranged from 29-37% depending on species. Fungal growth on seeds during the ageing period appeared to reduce post-ageing germination in some seed lots . Substituting saturated salts for distilled water did not stress seed lots in the AA test, due to the lowered RH%, the exception being seed lots 1210 and 1296. For forage and Asian species, seed lot germination mostly remained above 90% when aged for 72 h at lowered RH%. Increasing the ageing duration from 72 to 96 hours resulted in some decreases in post-AA germination but no clear separation of seed lots. Surface sterilising the seeds prior to the AA test resulted in a lower incidence of contaminant fungi which was associated with a lower percentage of abnormal seedlings. The conductivity test was mostly able to identify vigour differences among forage and Asian vegetable brassica seed lots. Differences in conductivity readings were observed among seed lots in all species. Increasing the period of imbibition resulted in increased conductivity from most seed lots but radicle emergence occurred after 16-20 h of imbibition. Variation was observed in the time to reach 95% maximum of the imbibition curve for most species. Conductivity readings at 16 h would avoid possible influences of radicle emergence on results. Adjusting the SMC to 8.5% resulted in reduced variation in conductivity among replicates of seed lots, due to a reduction in imbibition damage. Seed size had a significant effect on both post-AA germination and conductivity results. In forage rape, large size seeds had higher post-AA germination cf. medium cf. small size seeds. In Asian kale, large size seeds had higher post-AA germination compared with small size seeds. For both forage rape and Asian kale, large size seeds had lower conductivity readings cf. small size seeds. The correlation analyses demonstrated significant relationships between AA testing and field emergence parameters (percentage emergence, emergence index and emergence rate). Significant relationships were also observed between conductivity testing and these field emergence parameters. Based on the correlation analysis, AA testing at 41°C/48 hand/or 42°C/48 h could be recommended to be used as an AA test for turnip and Asian rape; and 41°C/48 hand/or 41°C/72 h for Asian kale and choisum. Based on the correlation analysis, conductivity testing at 16 h can be used to predict the field emergence potential of forage and Asian vegetable seed lots. Vigour tests were consistently able to provide better indicators of field perfonnance than the standard germination test, although these relationships did vary with the different field sowings.

Police officers provide emergency services to the public, while being simultaneously exposed to various organisational and social stressors over which they have little or no control. The outcome of this may be that highly committed and loyal police officers become psychologically and physically burned-out. Adversely, others may accept the same conditions and situations as a challenge and live an energetic and proactive life while experiencing a positive affective state (vigour) toward their duties. Officers who are burned-out may fail to meet their goal to protect the public, but eventually may suffer. The general objective of this study was to investigate vigour and burnout as obliquely related outcomes of the stress and coping process in terms of its dynamic relationship with challenges or threats, and the mediating role of personal factors, social resources and coping resources in the police context. The research is a qualitative explication of theoretical concepts and constructs, followed by a quantitative empirical survey design. The survey led to a Structural Equation Model (SEM) fit between empirical data and the Moos (1994) hypothesised stress and coping model. Seven measuring instruments were used to collect data. Job demands, work overload and uncertainty were identified as causes of work stress originating within the work situation. Respondents indicated that family members play a role in social support, although it decreases when stress increases. The SEM procedure revealed that social support and personality has a limited and direct effect on well-being when experiencing a positive affective state (vigour), with coping strategies deleted from the experimental model. Adversely, stress has a direct effect on well-being (and eventually burnout) with no moderating effects by the hypothesised variables. The study proposes a new Police Vigour and Burnout Model (PVBM) as an alignment to the Moos (1994) model. It is recommended that vigour and burnout, as outcomes of the stress and coping process, be included in future studies as obliquely related variables in other spheres of society. An additional proposal is that stress inducing features within the police organisation should be scrutinized and critically addressed to prevent negative psychological affects. / Industrial Psychology / D.Litt. et Phil. (Industrial and Organisational Psyschology)

This research explores the relationship between sense of coherence, work engagement and organisational commitment in an automotive development institution in South Africa. The study was conducted through quantitative research. The study used the Orientation to Life Questionnaire (OLQ) to measure sense of coherence, the Utrecht Work Engagement Scale (UWES) to measure work engagement and the Organisational Commitment Scale (OCS) to measure organisational commitment. A biographical questionnaire was also used. The questionnaires were administered to a sample of 46 employees, 37 of whom were based in the company’s Pretoria office and nine at their Eastern Cape office. In view of the fact that the sample was small, 100 % of the population was included in the study. A theoretical relationship between the constructs was determined and an empirical study provided evidence of the degree of relationship that existed between them. The results reveal significant relationships to exist between some sub-scales, however, statistical significance could not be reached for some correlations. / Psychology / M. Admin. (Industrial and Organisational Psychology)

One of the challenges imposed by the 21st century is to retain talented staff by keeping employees engaged in their work. Engagement in itself is a complex construct, which still requires much clarification. One of the gaps in the literature is the link between engagement and the competencies required by individuals to craft a career in the 21st century. These competencies are referred to as psychological career resources (Coetzee, 2008). This study was conducted in a medium-sized South African software and services organisation using a random sample of 111 consultants. The primary objective of the study was to investigate the relationship between psychological career resources (career preferences, career values, career enablers, career drivers and career harmonisers) and engagement (dedication, vigour and absorption). The second and third objectives were to find whether there were any significant differences between individuals who differed as to gender, age, marital status, occupational field, occupational level and department in which employed with regard to engagement and psychological career resources. A further objective was to establish the dominant psychological career resources and engagement constructs of the consultants in the sample. The data was collected using the 9-item U-WES (Utrecht Work Engagement Scale) and the PCRI (Psychological Career Resources Inventory). The study found that behavioural adaptability and self-esteem have a significant impact on vigour and dedication, while behavioural adaptability also has a significant impact on absorption. This study could contribute meaningful information to the field of well-being and career development, allowing professionals to assist individuals in developing career competencies that contribute to engagement and ultimately to well-being. / Dissertation (MCom)--University of Pretoria, 2012. / Human Resource Management / unrestricted

The aim of this study was to investigate the relationship between burnout and work engagement among employees in the pharmaceutical distribution industry. The research conducted on these concepts was geared towards adding to the knowledge base in the field of industrial and organisational psychology, to enable the current organisation from which the sample was chosen and other organisations in South Africa to focus on the effect that burnout has on employees, which directly affects the company. A quantitative survey using primary data was conducted on a convenience sample (N = 204) of full-time employees in a South African pharmaceutical distribution company. The Maslach Burnout Inventory – General Survey model (MBI-GS) and the Utrecht Work Engagement Scale (UWES) model were used to gather data. The work engagement-burnout continuum has received a great deal of research attention (Maslach, Schaufeli, & Leiter, 2001; Schaufeli & Bakker, 2003; Schutte, Toppinen, Kalimo, & Schaufeli, 2000) that has produced contradicting results. One viewpoint regards the core constructs of work engagement and burnout as opposite poles of two continua (vigour-exhaustion and dedication-cynicism), labelled energy and identification, respectively (González-Romá, Schaufeli, Bakker, & Lloret, 2006). Work engagement is ”characterized by a high level of energy and strong identification with one’s work”, while burnout is ”characterized by the opposite: A low level of energy combined with poor identification with one’s work” (Schaufeli & Bakker, 2003, p. 5; Bakker, Schaufeli, Leiter, & Taris, 2008). Hence work engagement and burnout can be recognised as inseparable and co-dependent constructs that share more or less 10 to 25% of their variance and are moderately negatively related (Schaufeli & Bakker, 2004; Schaufeli, Salanova, González-Romá, & Bakker, 2002). The second viewpoint regards work engagement and burnout as being strongly related, but fundamentally different in their separation in the work experience. They are therefore not opposite poles of a continuum (Denton, Newton, & Bower, 2008; Huhtala & Parzefall, 2007; Rothmann & Joubert, 2007; Schaufeli & Bakker, 2004; Schaufeli et al., 2002). Work engagement is defined as a ”positive, fulfilling, work-related state of mind that is characterised by vigour, dedication, and absorption” (Schaufeli & Bakker, 2004, p. 295). Burnout, however, is defined by Maslach and Jackson (1981, p. 99) as a ”syndrome of emotional exhaustion and cynicism that occurs frequently amongst individuals who do ‘people-work’ of some kind”. The statistical results of this study confirmed the hypothesis. It was found that there is a significant relationship between burnout and work engagement. Burnout is indeed negatively related to work engagement in the contact centre. However, a definitive relationship between burnout and work engagement in the distribution centre was not established. / Industrial & Organisational Psychology / M. Comm. (Industrial Psychology)

Leaders engaging in controlling leadership behaviours (CLB) has been connected to followers perceiving their basic needs thwarted. However, little research has been made in the organizational field to understand the implications of controlling leadership behaviours for employee well-being. The present study aimed to clarify this relation through understanding controlling leadership behaviours’ influence on employee health, as well as investigate the impact of both leader and employee gender on employees’ perception of  controlling leadership behaviours. A sample of 818 employees, representing the Swedish labour market, completed a questionnaire including measures of perceived controlling leadership behaviours and well-being in terms of self-rated health, burnout, self-rated job satisfaction and vigour. Results confirmed the notion that leaders’ controlling leadership behaviours, like other negative leadership behaviours, is associated with lowered well-being. Results also indicate that male employees perceive male leaders as more controlling than female employees do, while female leaders are perceived as equally controlling by both male and female employees. The gender of leaders exhibiting controlling leadership behaviours seem to have no association with employee well-being. The implications of gender on controlling leadership behaviours is still a question unanswered. Future studies should therefore continue exploring both leader and employee gender influence on CLB. / Ledare som använder sig av kontrollerande ledarskapsbeteenden har visat sig underminera basala psykologiska behov hos sina följare. Trots detta saknas det forskning på hur chefers kontrollerande ledarskapsbeteenden påverkar anställda. Denna studie syftade till att klargöra hur kontrollerande ledarskapsbeteenden påverkar anställdas hälsa, och undersöka hur såväl anställdas kön och chefens kön påverkar de anställdas uppfattning av chefens kontrollerande ledarskapsbeteenden. Ett randomiserat urval på 818 arbetstagare svarade på frågor om uppfattat kontrollerande ledarskapsbeteenden hos sin chef och självskattad hälsa i termer av självskattad hälsa, utbrändhet, arbetstillfredsställelse och arbetsenergi. Resultaten bekräftade att kontrollerande ledarskapsbeteenden hos chefer är relaterat till sämre hälsa och arbetsprestation hos de anställda, samt ökar viljan att sluta. Manliga anställda uppfattar manliga chefer som mer kontrollerande jämfört med sina kvinnliga kollegor, medan kvinnliga chefer uppfattas lika kontrollerande av både manliga som kvinnliga anställda. Den kontrollerande chefens könstillhörighet var inte associerat med anställdas mående. Hur könsaspekter påverkar kontrollerande ledarskapsbeteenden är fortfarande inte klarlagt. Framtida studier bör därför fortsätta undersöka hur både chefens och den anställdas kön influerar CLB.

The association between individual plant performance and seed yield variability within and between field pea crops was investigated. In 1988/89 six F8 genotypes with morphologically distinct characteristics were selected from a yield evaluation trial. Analysis of the individual plant performance within these crops indicated an association between low seed yields and the location and dispersion of plant harvest index (PHI) and plant weight (PWT) distributions. The analyses also showed there was a strong linear relationship between the seed weight (SWT) and PWT of the individual plants within each crop, and that the smallest plants tended to have the lowest PHI values. A series of 20 simulations was used to formalize the relationships between SWT, PWT and PHI values within a crop into a principal axis model (PAM). The PAM was based on a principal axis which represented the linear relationship between SWT and PWT, and an ellipse which represented the scatter of data points around this line. When the principal axis passed through the origin, the PHI of a plant was independent of its PWT and the mean PHI was equal to the gradient of the axis. However, when the principal axis had a negative intercept then the PHI was dependent on PWT and a MPW was calculated. In 1989/90 four genotypes were sown at five plant populations, ranging from 9 to 400 plants m⁻². Significant seed and biological yield differences were detected among genotypes at 225 and 400 plants m⁻². The plasticity of yield components was highlighted, with significant genotype by environment interactions detected for each yield component. No relationship was found between results for yield components from spaced plants and those found at higher plant populations. The two highest yielding genotypes (CLU and SLU) showed either greater stability or higher genotypic means for PHI than genotypes CVN and SVU. Despite significant skewness and kurtosis in the SWT, PWT, and PHI distributions from the crops in this experiment, the assumptions of the PAM held. The lower seed yield and increased variability in PHI values for genotype CVN were explained by its higher MPW and the positioning of the ellipse closer to the PWT axis intercept than in other genotypes. For genotype SVU, the lower seed yield and mean PHI values were explained by a lower slope for the principal axis. Both low yielding genotypes were originally classified as having vigorous seedling growth and this characteristic may be detrimental to crop yields. A method for selection of field pea genotypes based on the PAM is proposed. This method enables the identification of weak competitors as single plants, which may have an advantage over vigorous plants when grown in a crop situation.