Objetivo: O presente estudo teve como objetivo realizar a adaptação transcultural e verificar a confiabilidade, consistência interna, validade estrutural e a validade de construto do ProFiMap-neck em indivíduos com relato de dor cervical crônica. Método: Participaram deste estudo pacientes do sexo feminino com relato de dor cervical há mais de 3 meses durante o movimento ou repouso A amostra foi composta por 30 indivíduos (33,43±10,32 anos) para a etapa de teste da versão pré-final, 100 indivíduos (38,89±10,84 anos) para a confiabilidade e 180 indivíduos (37,49±11,86 anos) para a validadade de construto, para a análise da consistência interna e validade estrutural. O processo de tradução e retrotradução ocorreu em 5 etapas: 1) Tradução inicial para o português, 2) Síntese de traduções, 3) Retrotradução, 4) Comitê de especialistas, e 5) O teste da versão pré-final. Para validade de construto a pontuação do ProFitMap-neck foi correlacionada com a pontuação do Neck Disability Index (NDI), além disso, foram utilizados para fins de correlação a Escala de Ansiedade e Depressão Hospitalar (HADS-A e HADS-D), a Escala Tampa de Cinesiofobia e o Short Form - 36 (SF-36). Para a análise fatorial exploratória foi utilizada a Análise de Componentes Principais, o indice de Kaiser-Meyer-Olkin (KMO) e % de variância cumulativa. Para a análise da consistência interna foi utilizado o coeficiente de ? de Cronbach. Para a confiabilidade foi utilizando o Coeficiente de Correlação Intraclasse (CCI). O coeficiente de correlação de Pearson foi utilizado para verificação das correlações. A magnitude da correlação foi graduada da seguinte maneira: R<0,29: pobre; 0,3<R<0,69: moderada; R>0,7: forte. Resultados: Durante o processo de teste da versão pré-final não foram relatadas dúvidas pela amostra de pacientes ao responder o instrumento. Para a escala de Sintomas/Intensidade do ProFitMap-neck versão português brasileiro foram verificados dois domínios (Escala de Sintomas/Intensidade Geral e Escala de Sintomas/Intensidade Equilíbrio) com porcentagem de variância cumulativa de 57,33% e índice KMO=0,66. Para a escala de Sintomas/Frequência do ProFitMap-neck foi verificado apenas 1 domínio com porcentagem de variância cumulativa de 56,20% e KMO=0,84. Para a escala de Limitação Funcional do ProFitMap-neck foram verificados 2 domínios (Postura e AVDs e Movimento e Percepção de Saúde) com porcentagem de variância cumulativa de 56,28% e KMO=0,57. Todos os itens apresentaram carga fatorial superior a 0,2. A análise de consistência interna demonstrou valores de alpha de cronbach adequados (alpha>0.70) para todos os domínios do ProFitMap-neck. Na reprodutibilidade foram verificados valores de CCI excelentes para todos os domínios e escalas (ICC>0,75). Nossos achados demonstraram correlações moderadas/fortes e negativas entre a pontuação total do NDI e as pontuações dos domínios e escalas Sintomas/Intensidade, Sintomas/Frequencia e Limitação Funcional do ProFitMapneck (R=-0,65, R=-0,56 e R=-0,71, respectivamente). Foram verificadas correlações no geral moderadas/fortes e positivas entre os escores das ferramentas SF-36 e ProFitMap-neck. Para as correlações entre Ansiedade, Despressão e Cinesiofobia e as Escalas do ProFitMap-neck versão português brasileiro foram verificadas correlações em sua maioria moderadas e fortes (-0,32<R<-0,82). Conclusão: O ProFitMap-neck versão português-Brasil apresentou índices psicométricos adequados e, dessa forma, está disponível para ser empregado na prática clínica e pesquisa em pacientes com dor cervical crônica. / Objective: This study aimed to perform the cultural adaptation and verify the reliability, internal consistency, structural validity and construct validity of the Profile Fitness Mapping neck questionnaire (ProFiMap-neck) in individuals reporting chronic neck pain. Method: This study recruited female patients with neck pain for more than three months during motion or at rest The sample consisted of 30 individuals (33.43 ± 10.32 years) to test the pre-final version, 100 individuals (38.89 ± 10.84 years) for reliability and 180 individuals (37.49 ± 11.86 years) for construct validity, analysis of internal consistency and structural validity. The process of translation and back translation occurred in 5 steps: 1) Initial translation into Portuguese, 2) Summary of translations, 3) Back-translation, 4) Committee of Experts, and 5) The test of the pre-final version. Construct validity was verified correlating scores on ProFitMap-neck and Neck Disability Index (NDI), Hospital Anxiety Depression Scale (HADS-A and HADS-D), Tampa Scale of Kinesiophobia and the Short Form - 36 (SF-36). Exploratory factor analysis was perfomed considering Principal Component Analysis, the Kaiser-Meyer-Olkin index (KMO) and percentange of cumulative variance. For the analysis of internal consistenc, we used ? Cronbach and for reliability Intraclass Correlation Coefficient (ICC) was used. The Pearson correlation coefficient was used to investigate correlations and the strength was graded as follows: R <0.29: poor; 0.3 <R <0.69: moderate; R> 0.7: Strong. Results: During the test of the pre-final version, volunteers did no report doubts. Structural validity retained two domains for Symptoms/Intensity ProFitMap-neck Brazilian Portuguese version (General Symptoms Intensity and Symptoms Intensity/ Balance) with cumulative percentage of variance of 57.33% and KMO=0.66. For the Scale Symptoms/Frequency of ProFitMap-neck we identified one domain, with cumulative percentage of variance of 56.20% and KMO = 0.84. For Functional Limitation of the ProFitMap-neck, we identified two domains (Posture and Movement and Diary Life Activities and Health Perception) with cumulative percentage of variance of 56.28% and KMO = 0.57. All items had factors loadings greater than 0.2. The internal consistency analysis revealed adequate alpha Cronbach values (alpha>0.70) for all ProFitMap-neck domains. We obtained excellent ICC values for all domains and scales (ICC> 0.75). Our findings showed moderate/strong and negative correlations between the total score of the NDI and the scores of the domains and scales Symptoms/Intensity, Symptoms/Frequency and Functional Limitation of ProFitMap-neck brazilian portuguese version (R = -0.65, R = -0.56 and R = -0.71, respectively). Correlations between the scores of the SF-36 and ProFitMapneck tools were in the majority moderate/strong and positive. For correlations between anxiety, depression and kinesiophobia and the scales of the ProFitMap-neck brazilian portuguese version were observaded moderate and strong values (-0.32 <R <-0.82). Conclusion: ProFitMap-neck portuguese-Brazil version showed adequate psychometric indexes and, therefore, it\'s available to be apllied in clinical practice and research in patients with chronic neck pain.

Introdução: Ruminação é a perseveração mal-adaptativa de pensamentos auto-centrados. Evidências sinalizam que ela está associada com início e manutenção de episódios depressivos, e ocorre em múltiplos transtornos mentais. A ruminação está associada com marcadores de desenvolvimento psicopatológico, como volumetria cerebral, memória, genes do BDNF e serotonina. É necessário aprofundar o conhecimento da ruminação enquanto traço dimensional, e conhecer melhor sua associação com variáveis sóciodemográficas, biológicas e clínicas para entender quando passa a ser um sintoma. Entretanto, aferi-la é um desafio, considerando que só existem escalas psicométricas. A mais utilizada, Ruminative Response Scale (RRS), foi validada em amostras não-clínicas. Objetivos: Avaliar ruminação transdiagnosticamente e determinar a validade de constructo da RRS em amostra clínica, buscando determinar fatores sócio-demográficos, clínicos e neurobiológicos associados a maiores escores de ruminação. Métodos: Estudo transversal, amostra não-probabilística. Foram convidados a participar 944 pacientes em atendimento psiquiátrico ambulatorial no HCPA entre março/2015 e junho/2016, maiores de 18 anos, que soubessem ler e escrever, e portadores de transtornos bipolares, depressão, esquizofrenia, esquizoafetivo, ansiedade generalizada, pânico, fobia específica e obsessivocompulsivo. Foram excluídos 373 com doenças que alteram resposta inflamatória, dependência química, gravidez, lactação, doenças neurológicas, vasculares e degenerativas. Recusaram-se a participar 254. Foram incluídos 317 pacientes, e 200 completaram a coleta de dados, que foi realizada em 4 etapas: 1) perfil sócio-demográfico e escalas auto-aplicáveis: ruminação, preocupação e funcionalidade; 2) amostras de sangue e entrevista clínica para aplicação das escalas de sintomas: depressão, mania, ansiedade e gravidade; 3) confirmação diagnóstica; e 4) processamento, armazenamento e análises bioquímicas das amostras de sangue. No primeiro artigo, revisamos sistematicamente a literatura sobre ruminação nos transtornos bipolares. No segundo, determinamos as validades de construto e externa da RRS. No terceiro, usamos machine learning para encontrar padrões de ruminação e determinar quais variáveis associadas preveem ruminação. Resultados: Ruminação está presente em todas as fases do transtorno bipolar, e é um sintoma estável independente do estado de humor, apesar de ter relação estreia com ele. Verificou-se também que mulheres ruminam mais que homens. Os escores de ruminação foram menores nos portadores de esquizofrenia que nos com depressão maior, bipolaridade e ansiedade. RRS apresentou boa confiabilidade, com 2-fatores correlacionados, brooding e ponderação, que apresentaram similaridade nas correlações com medidas clínicas, confirmando a validade externa transdiagnóstica. Por fim, encontrou-se que as variáveis associadas aos pacientes que mais ruminam são preocupação, sintomas de ansiedade generalizada e depressão, gravidade, nível socioeconômico e diagnóstico atual de pânico, sinalizando que ruminação pode ser um marcador de maior sensibilidade à ansiedade. Discussão: Ruminação parece ser um sintoma transdiagnóstico marcador de sofrimento. Os resultados desta tese contribuem para ampliar a discussão sobre diagnóstico psiquiátrico, agregando evidências para aprimorar as definições de limites e sobreposições diagnósticas entre as doenças mentais em que a ruminação ocorre. Por fim, conhecer melhor os mecanismos bioquímicos e clínicos envolvidos na ruminação contribuem na compreensão sobre quando ela deixa de ser um traço normal e vira um sintoma que necessita de tratamento. / Introduction: Rumination has been described as maladaptive perseveration of self-centered thoughts. Evidence indicates that rumination is associated with onset and maintenance of depressive episodes, it’s present in several mental disorders. Rumination is associated with markers of development of psychopathology, such as cerebral volumetry, memory, BDNF and serotonin genes. Measuring rumination is a challenge, considering that are available only psychometric scales. The most used, the Ruminative Responses Scale (RRS), was validated on non-clinical samples. Objectives: To evaluate transdiagnostically the rumination and to determine construct validity of the RRS in outpatients, in order to determine which associated factors lead the patients to ruminate. Methods: Cross-sectional study, non-probabilistic sample. A total of 944 patients in psychiatric outpatient treatment at HCPA between March / 2015 and June / 2016, major than 18 years old, knowing read and write, presenting bipolar disorder, schizophrenia, schizoaffective disorder, generalized anxiety disorder, panic disorder, phobia specific and obsessive-compulsive disorder were invited to participate. We excluded 373 patients with diseases that alter inflammatory response, chemical dependence, pregnancy, lactation, neurological, vascular and degenerative diseases. Two hundred fifty four refused to participate, 317 were included, and 200 completed the data collection, which was performed in 4 stages: 1) socio-demographic profile and self-applicable scales: rumination, worry and functionality; 2) blood samples and clinical interview for the application of symptom scales: depression, mania, anxiety and severity; 3) diagnostic confirmation; and 4) processing, storage and biochemical analyzes of blood samples. In the first article, we systematically reviewed the literature on rumination in bipolar disorders. In the second, we evaluated construct and external validity of RRS. In the third, we used machine learning algorithms to find patterns of rumination and to determine which associated variables predict rumination. Results: Rumination is present in all phases of bipolar disorder, it is a stable symptom, independent of mood, despite it has close relationship with it. It has also been found that women ruminate more than men. Rumination scores were lower in patients with schizophrenia than in major depression, bipolarity and anxiety patients. RRS presented good reliability, with correlated 2-factors, brooding and pondering, which presented similar correlations with clinical measures, confirming the external transdiagnostic validity. Finally, it was found that the variables associated with the greater scores of rumination are worry, symptoms of generalized anxiety and depression, severity of symptoms, socioeconomic level and current diagnosis of panic, signaling that rumination may be a marker of greater sensitivity to anxiety. Discussion: Rumination seems to be a transdiagnostic symptom of suffering. The results of this thesis contribute to broadening the discussion about psychiatric diagnostic, adding evidence to improve the definitions of limits and diagnostic overlaps between mental illnesses in which rumination occurs. Finally, a better understanding of the biochemical and clinical mechanisms involved in rumination may contribute to understanding of when rumination ceases to be a normal trait and becomes a symptom that requires treatment.

The feeling of anxiety, a conscious experience, is associated with uneasiness, painfulness, or disturbing suspense. The current paper presents the phenomenology of anxiety disorders based on diagnostic criteria and reviews neuroimaging studies on anxiety including dissociation studies. Activity in the anterior cingulate cortex, medial prefrontal cortex, insula, temporal poles and amygdala suggest neural correlates of anxiety. The relevance of the neural correlates, how the feeling of anxiety differs from fear and worry, and the construct validity of anxiety are addressed. Anxiety and pain correlate with activity in the anterior cingulate cortex, which warrants further studies on the painfulness–anxiety relationship.

Contexte théorique : Au Canada, la prévalence du trouble de stress post-traumatique (TSPT) serait de 9,2%. Plusieurs questionnaires ont été développés pour mesurer les symptômes du TSPT dont le PTSD Checklist For DSM-5 (PCL-5). Ce questionnaire autorapporté a été validé à plusieurs reprises avec des échantillons non-cliniques ou militaires. Toutefois, le PCL-5 n’a jamais été validé avec un échantillon clinique et civil. Aussi, le nombre idéal de facteur du PCL-5 reste toujours à être démontré. Objectif : Cette étude vise à établir la validité de construit du PCL-5 d’un échantillon clinique et civil de 132 participants aux prises avec un TSPT. Les 3 principales structures factorielles seront analysées de façon à retenir celle qui présente les meilleurs résultats. Méthodologie : Les structures factorielles ont été mesurées avec des analyses factorielles confirmatoires et des analyses bifactorielles. La consistance interne a été mesurée à partir du coefficient Oméga de McDonald. La validité convergente et divergente a été mesurée par des corrélations de Pearson avec d’autres construits. Résultats : Au niveau des indices d’ajustement, le modèle à 7 facteurs a obtenu les meilleurs résultats. Sur le plan de la fidélité et sur celui de la validité convergente et divergente, le modèle à 4 facteurs possède les résultats les plus optimaux. Discussion : Globalement, le modèle à 4 facteurs est le plus approprié pour le PCL-5. De plus, les modèles à 6 et 7 facteurs présentent quelques lacunes sur le plan méthodologique et statistique. Finalement, le PCL-5 est un questionnaire valide et fidèle pour une population clinique et civile. / Background: In Canada, the prevalence of post-traumatic stress disorder (PTSD) is estimated to be 9.2%. Several questionnaires have been developed to measure the symptoms of PTSD including the PTSD Checklist For DSM-5 (PCL-5). This questionnaire has been validated several times with non-clinical or military samples. However, PCL-5 has never been validated with a clinical and civilian sample. Also, the ideal factor number of PCL-5 has yet to be demonstrated. Objective: This study aims to establish the construct validity of PCL-5 in a clinical and civilian sample of 132 participants with PTSD. The 3 main factor structures will be analyzed in order to retain the one that presents the best results. Methodology: Factor structures were measured with confirmatory factor analyzes and bifactor analyzes. Internal consistency was measured from McDonald's Omega coefficient. Convergent and discriminant validity was measured by Pearson correlations with other constructs. Results: In terms of fit statistics, the 7-factor model obtained the best results. In terms of reliability and convergent and divergent validity, the 4-factor model has the most optimal results. Discussion: Overall, the 4-factor model is the most appropriate for the PCL-5. In addition, the 6 and 7 factor models have some methodological and statistical limitations. Finally, the PCL-5 is a valid and reliable questionnaire for a clinical and civilian population.

Emotional intelligence has attracted a considerable amount of attention over the past few years specifically with regard to the nature of the underlying construct and the reliability and validity of the psychometric tools used to measure the construct. The present study explored the reliability and validity of a trait measure of EI in relation to an ability measure in order to determine whether the tools can be considered as measuring conceptually valid constructs within an occupational environment. The study also examined the overlap with a trait measure of cognitive thinking styles to determine the potential for separating the trait and ability EI into two unique and distinguishable constructs. Participants included 308 employees from four different workforces within a diverse South African consulting firm. The results of the study identified a number of psychometric concerns regarding the structural fidelity of the instruments as well as concerns about the cultural bias evident in both measurement instruments. Evidence for the discriminant and incremental validity of the two instruments was, however, provided and recommendations are made for the reconceptualisation of trait EI as an emotional competence and ability EI as an emotional intelligence. / Psychology / D. Litt. et Phil. (Psychology)

Despite widespread recognition by science educators, researchers and K-12 frameworks that scientific inquiry should be an essential part of science education, typical classrooms and assessments still emphasize rote vocabulary, facts, and formulas. One of several reasons for this is that the rigorous assessment of complex inquiry skills is still in its infancy. Though progress has been made, there are still many challenges that hinder inquiry from being assessed in a meaningful, scalable, reliable and timely manner. To address some of these challenges and to realize the possibility of formative assessment of inquiry, we describe a novel approach for evaluating, tracking, and scaffolding inquiry process skills. These skills are demonstrated as students experiment with computer-based simulations. In this work, we focus on two skills related to data collection, designing controlled experiments and testing stated hypotheses. Central to this approach is the use and extension of techniques developed in the Intelligent Tutoring Systems and Educational Data Mining communities to handle the variety of ways in which students can demonstrate skills. To evaluate students' skills, we iteratively developed data-mined models (detectors) that can discern when students test their articulated hypotheses and design controlled experiments. To aggregate and track students' developing latent skill across activities, we use and extend the Bayesian Knowledge-Tracing framework (Corbett & Anderson, 1995). As part of this work, we directly address the scalability and reliability of these models' predictions because we tested how well they predict for student data not used to build them. When doing so, we found that these models demonstrate the potential to scale because they can correctly evaluate and track students' inquiry skills. The ability to evaluate students' inquiry also enables the system to provide automated, individualized feedback to students as they experiment. As part of this work, we also describe an approach to provide such scaffolding to students. We also tested the efficacy of these scaffolds by conducting a study to determine how scaffolding impacts acquisition and transfer of skill across science topics. When doing so, we found that students who received scaffolding versus students who did not were better able to acquire skills in the topic in which they practiced, and also transfer skills to a second topic when was scaffolding removed. Our overall findings suggest that computer-based simulations augmented with real-time feedback can be used to reliably measure the inquiry skills of interest and can help students learn how to demonstrate these skills. As such, our assessment approach and system as a whole shows promise as a way to formatively assess students' inquiry.

Despite widespread recognition by science educators, researchers and K-12 frameworks that scientific inquiry should be an essential part of science education, typical classrooms and assessments still emphasize rote vocabulary, facts, and formulas. One of several reasons for this is that the rigorous assessment of complex inquiry skills is still in its infancy. Though progress has been made, there are still many challenges that hinder inquiry from being assessed in a meaningful, scalable, reliable and timely manner. To address some of these challenges and to realize the possibility of formative assessment of inquiry, we describe a novel approach for evaluating, tracking, and scaffolding inquiry process skills. These skills are demonstrated as students experiment with computer-based simulations. In this work, we focus on two skills related to data collection, designing controlled experiments and testing stated hypotheses. Central to this approach is the use and extension of techniques developed in the Intelligent Tutoring Systems and Educational Data Mining communities to handle the variety of ways in which students can demonstrate skills. To evaluate students' skills, we iteratively developed data-mined models (detectors) that can discern when students test their articulated hypotheses and design controlled experiments. To aggregate and track students' developing latent skill across activities, we use and extend the Bayesian Knowledge-Tracing framework (Corbett & Anderson, 1995). As part of this work, we directly address the scalability and reliability of these models' predictions because we tested how well they predict for student data not used to build them. When doing so, we found that these models demonstrate the potential to scale because they can correctly evaluate and track students' inquiry skills. The ability to evaluate students' inquiry also enables the system to provide automated, individualized feedback to students as they experiment. As part of this work, we also describe an approach to provide such scaffolding to students. We also tested the efficacy of these scaffolds by conducting a study to determine how scaffolding impacts acquisition and transfer of skill across science topics. When doing so, we found that students who received scaffolding versus students who did not were better able to acquire skills in the topic in which they practiced, and also transfer skills to a second topic when was scaffolding removed. Our overall findings suggest that computer-based simulations augmented with real-time feedback can be used to reliably measure the inquiry skills of interest and can help students learn how to demonstrate these skills. As such, our assessment approach and system as a whole shows promise as a way to formatively assess students' inquiry.

Thesis (Ph.D. (Industrial Psychology))--North-West University, Vaal Triangle Campus, 2006.

The information technology industry is considered to be one of the most demanding industries, with significant social, physical and psychological consequences for the wellbeing of the information technology professional. Work wellness and general psychological well-being plays an important role in the well-being of the information technology professional. The measurement of work-related wellness requires valid, reliable and culturally fair measuring instruments. However research on work wellness and occupational well-being in South Africa is lacking, especially in the information technology context. A lack of norms for work-related wellness in South Africa makes the identification of work-related wellness in the information technology industry difficult. Consequently, investigating the reliability, validity, equivalence and bias of work-related well-being measuring instruments would result in the standardisation of work wellness (consisting of burnout and engagement) and occupational well-being, suitable for use in the multicultural information technology industry setting. Moreover, the operationalisation of work wellness, as well as an inclusive model regarding the work-related wellness of information technology professionals that includes work wellness and occupational wellbeing are lacking in the South African literature. The objectives of this research were to standardise the measurement of work wellness for information technology professionals in South Africa, to develop and test a model of occupational well-being for information technology professionals in South Africa, to develop and test a comprehensive model of work-related wellness for information technology professionals in South Africa (consisting of work wellness and occupational well-being), and to test for moderating effects of affectivity in the experience of mark related well-being of information technology professionals in South Africa. The research consists of three separate articles, each consisting of a brief literature overview and an empirical study. A cross-sectional survey design with a snowball sample (n = 214) of information technology professionals in South Africa was used. Adapted versions of the Maslach Burnout Inventory - General Survey (MBI-GS) and Gtrecht Work Engagement Scale (UWES), as well as the Satisfaction with Life Scale (SWLS), Affectometer 2 (AFM-2), Life Orientation Test - Revised (LOT-R), Organisational Commitment Questionnaire (OC-Q), Information Technology Job Characteristics Inventory (ITJCI), as well as the Health scale of the Organisational Screening Evaluation Tool (ASSET) and a biographical questionnaire were used. Descriptive statistics, analysis of variance, correlations, exploratory factor analysis and structural equation modeling were used. Exploratory factor analysis confirmed a two-factor model for the MBI-GS consisting of a combined Burnout factor and Professional Efficacy, while a one-factor model was found for the UWES, namely Engagement, with acceptable internal consistencies. Exploratory second-order factor analysis confirmed a two-factor, culturally fair model of work wellness for information technology professionals in South Africa, consisting of burnout and work engagement. Item bias analysis revealed no evidence of bias for the MBI-GS, while uniform bias was found for two items (Items 7 and 12) of the UWES. Construct equivalence in terms of work wellness was obtained for the different language groups in the sample. The results confirmed a four-factor model of occupational well-being for information technology professionals in South Africa, namely negative and positive work wellness, organisational commitment and general psychological well-being. The model of occupational well-being was found to be equivalent across language groups, except for general psychological well-being, which seemed to differ for the non-mother-tongue English language speakers. In terms of work-related wellness, a model consisting of work wellness and occupational well-being was constructed and uccessfully tested. Structural equation analysis confirmed main effects for negative affectivity in terms of burnout and engagement, while main effects were confirmed for burnout, ill-health and engagement in terms of positive affectivity. Interaction effects for affectivity were not confirmed in the model of work-related wellness of information technology professionals in South Africa. Recommendations for the organisation and future research were made / Thesis (Ph.D. (Industrial Psychology))--North-West University, Vaal Triangle Campus, 2006.

The information technology industry is considered to be one of the most demanding industries, with significant social, physical and psychological consequences for the wellbeing of the information technology professional. Work wellness and general psychological well-being plays an important role in the well-being of the information technology professional. The measurement of work-related wellness requires valid, reliable and culturally fair measuring instruments. However research on work wellness and occupational well-being in South Africa is lacking, especially in the information technology context. A lack of norms for work-related wellness in South Africa makes the identification of work-related wellness in the information technology industry difficult. Consequently, investigating the reliability, validity, equivalence and bias of work-related well-being measuring instruments would result in the standardisation of work wellness (consisting of burnout and engagement) and occupational well-being, suitable for use in the multicultural information technology industry setting. Moreover, the operationalisation of work wellness, as well as an inclusive model regarding the work-related wellness of information technology professionals that includes work wellness and occupational wellbeing are lacking in the South African literature. The objectives of this research were to standardise the measurement of work wellness for information technology professionals in South Africa, to develop and test a model of occupational well-being for information technology professionals in South Africa, to develop and test a comprehensive model of work-related wellness for information technology professionals in South Africa (consisting of work wellness and occupational well-being), and to test for moderating effects of affectivity in the experience of mark related well-being of information technology professionals in South Africa. The research consists of three separate articles, each consisting of a brief literature overview and an empirical study. A cross-sectional survey design with a snowball sample (n = 214) of information technology professionals in South Africa was used. Adapted versions of the Maslach Burnout Inventory - General Survey (MBI-GS) and Gtrecht Work Engagement Scale (UWES), as well as the Satisfaction with Life Scale (SWLS), Affectometer 2 (AFM-2), Life Orientation Test - Revised (LOT-R), Organisational Commitment Questionnaire (OC-Q), Information Technology Job Characteristics Inventory (ITJCI), as well as the Health scale of the Organisational Screening Evaluation Tool (ASSET) and a biographical questionnaire were used. Descriptive statistics, analysis of variance, correlations, exploratory factor analysis and structural equation modeling were used. Exploratory factor analysis confirmed a two-factor model for the MBI-GS consisting of a combined Burnout factor and Professional Efficacy, while a one-factor model was found for the UWES, namely Engagement, with acceptable internal consistencies. Exploratory second-order factor analysis confirmed a two-factor, culturally fair model of work wellness for information technology professionals in South Africa, consisting of burnout and work engagement. Item bias analysis revealed no evidence of bias for the MBI-GS, while uniform bias was found for two items (Items 7 and 12) of the UWES. Construct equivalence in terms of work wellness was obtained for the different language groups in the sample. The results confirmed a four-factor model of occupational well-being for information technology professionals in South Africa, namely negative and positive work wellness, organisational commitment and general psychological well-being. The model of occupational well-being was found to be equivalent across language groups, except for general psychological well-being, which seemed to differ for the non-mother-tongue English language speakers. In terms of work-related wellness, a model consisting of work wellness and occupational well-being was constructed and uccessfully tested. Structural equation analysis confirmed main effects for negative affectivity in terms of burnout and engagement, while main effects were confirmed for burnout, ill-health and engagement in terms of positive affectivity. Interaction effects for affectivity were not confirmed in the model of work-related wellness of information technology professionals in South Africa. Recommendations for the organisation and future research were made / Thesis (Ph.D. (Industrial Psychology))--North-West University, Vaal Triangle Campus, 2006.