The effects of new dimensions of psychological job demands and job control on active learning and occupational health

Abstract

Recent changes in job content may have led to changes in job demands and control, and earlier operationalizations of the demand concept may be too general (MT). The aim of this paper is to show how new dimensions of psychological job demands are related to two sets of outcome variables, employee health and active learning, and how these relationships are modified or interact with social support and types of job control. The study was carried out as a survey among employees of 13 electric companies in Norway, N=2435. Lisrel was used to assess the fit of the proposed models. Compared to the traditional demands control model, an extended version used in this study increased the explained variance on an average by 4% on various occupational health variables. It was found that various dimensions of demands were differentially related to the outcome variables. Skill discretion uniformly reduced the effect of the demands: for groups low in skill discretion there was a stronger relationship between demands and outcomes than for groups high in skill discretion. The interaction pattern for the remaining control and support variables was however more complicated and warrants further study. The practical implications are that employers should carefully consider the quality of work. Special attention should be given to the quantitative demands of the jobs, since there seems to be few moderators for the relationship between those demands and job stress and subjective health complaints.     

The impact of a participatory organizational intervention on job stress in community health care institutions

The aim of the present study was to investigate the effect of a short-term participatory intervention in health care institutions in Norway on workers' control, other job characteristics, job stress, subjective health and job satisfaction. Participants (including managers and supervisors) were randomly allocated to intervention groups and to a control group. Actions to solve problems based on the employees' own perceptions of the main problems were seen as the key motivators for organizational improvement and increased control at the task and office level in the work situation. The main stressors identified by the participants in this study were lack of information, communication and respect between professions, as well as the need for professional and personal development. The participatory intervention had a positive, but limited effect on work-related stress, job characteristics, learning climate and management style, and seemed to have started a beneficial change process. There were no negative short-term effects on work-related stress and job demands. Organizational interventions may be a potential training ground for acquiring participatory skills and resources, and if sustained after the intervention period, they can have long-term effects on problem solving, job stress and employee satisfaction.     

The development and validation of a job crafting measure for use with blue-collar workers

Abstract

Job crafting describes a set of proactive behaviours in which employees may engage to shape their work in order to minimize hindering job demands and maximize resources and challenging demands. Such behaviours may be particularly important among blue-collar workers whose jobs are characterized by poor working conditions and low well-being. We present the development and adaptation of a job crafting measure that may be used among blue-collar workers, based on an existing scale by Tims, Bakker, and Derks (2012) that was not specifically developed for blue-collar workers. We test the validity and reliability of the measure in a longitudinal study based on multiple source information from mail delivery workers in Denmark (N=362 at Time 1; N=408 at Time 2). Results indicate the presence of five job crafting dimensions: increasing challenging demands, decreasing social job demands, increasing social job resources, increasing quantitative demands and decreasing hindering job demands. These can be reliably measured with 15 items. The measure shows acceptable discriminant and criterion validity, and test-retest reliability. The findings extend the application of the original questionnaire. They also add to knowledge of the job crafting behaviours in which blue-collar workers engage and link them to well-being outcomes.     

Testing the demand-control-support model among health-care professionals: A structural equation model

Abstract

This paper reports a further empirical validation of the Demand-Control-Support Model (DCS model), which was developed by Johnson and colleagues (1988, 1989). Data were collected from a heterogeneous group of health-care professionals (nurses and nurses' aides; n = 249). Three major refinements were made to the validation of the DCS Model. First, all relationships in the model were estimated simultaneously by means of covariance structure modelling (LISREL 8). Second, the control dimension was refined substantially, using a psychometrically more sound assessment of the workers' autonomy. Third, the model was applied to the work of health-care professionals. The data did not confirm the assumption that both job strain and motivation are multiplicative functions of job demands, autonomy and social support. First, the results suggested that high levels of autonomy attenuate the increase of emotional exhaustion due to job demands. These results partially supported Karasek's Job Demand-Control Model (Karasek 1979). Second, high levels of social support proved to attenuate the increase of emotional exhaustion due to autonomy. Finally, the main effect of autonomy on job challenge implied that an increase in autonomy is accompanied by an increase in job challenge (and, consequently, job involvement). In addition, low job demands and a high amount of work-related support seem to reduce feelings of exhaustion and, consequently, health complaints.     

The Demands-Control-Support model,locus of control and job dissatisfaction: A longitudinal study

The Job-Demands-Control model (Karasek, 1979) has been widely studied in the job stress field, but the results obtained are frequently contradictory. Therefore, some investigations have expanded the model by including social support and personality characteristics such as locus of control. However, results obtained with these elaborated models have not been conclusive either. The present study sets out to integrate both types of expansions by simultaneously including social support at work and the employee's locus of control in a longitudinal multi-national study among 542 administrative personnel from Belgium, England, Spain, Italy and Israel. Hierarchical moderated multiple regression showed a significant 4-way interaction term (Demands 2 Control 2 Social support 2 Locus of control) on the change in job dissatisfaction. This effect is qualified by the interaction between job demands and control only for an internal locus of control with high social support. Contrary to the prediction of the JDC model, which posits that high control has a buffering effect on job dissatisfaction, the study result indicates a damaging effect of excess control (perceived job control and high internal locus of control), specifically in high social support situations.     

Work–family conflict: The importance of differentiating between different facets of job characteristics

This review study clarifies the relationships between job characteristics and work–family conflict (WFC) by differentiating among three facets of job characteristics: latent, perceived, and enacted. To date, research linking job characteristics to WFC has not distinguished the facets of job demands and job resources in this way. Such distinctions are important as a means of understanding the affective, behavioural, and cognitive processes involved in determining how and when job characteristics relate to WFC. Our review of 115 studies showed that perceived job characteristics have been most commonly explored in relation to WFC, whereas latent and enacted job characteristics have been hardly examined. While these findings may not be surprising, our contribution lies in reviewing the literature through the lens of these categories. Based on the findings, and through highlighting examples in the extant literature, we argue that understanding job characteristics in terms of both how they are perceived and enacted by workers will provide a deeper insight into the mechanisms underlying the relationship between job characteristics and WFC. In order to inform evidence-based interventions, future research must uncover the dynamic mechanisms underpinning the connection between job characteristics and WFC through a focus on enacted job facets and the cognitive, affective, and behavioural processes involved.     

The effects of new dimensions of psychological job demands and job control on active learning and occupational health

Recent changes in job content may have led to changes in job demands and control, and earlier operationalizations of the demand concept may be too general (MT). The aim of this paper is to show how new dimensions of psychological job demands are related to two sets of outcome variables, employee health and active learning, and how these relationships are modified or interact with social support and types of job control. The study was carried out as a survey among employees of 13 electric companies in Norway, N=2435. Lisrel was used to assess the fit of the proposed models. Compared to the traditional demands control model, an extended version used in this study increased the explained variance on an average by 4% on various occupational health variables. It was found that various dimensions of demands were differentially related to the outcome variables. Skill discretion uniformly reduced the effect of the demands: for groups low in skill discretion there was a stronger relationship between demands and outcomes than for groups high in skill discretion. The interaction pattern for the remaining control and support variables was however more complicated and warrants further study. The practical implications are that employers should carefully consider the quality of work. Special attention should be given to the quantitative demands of the jobs, since there seems to be few moderators for the relationship between those demands and job stress and subjective health complaints.     

Effects of resident-oriented care on job characteristics of nursing caregivers

This study evaluates the effects of the implementation of resident-oriented care on the job characteristics (job autonomy, job demands and social support) of nursing caregivers in three Dutch nursing homes. In a quasi-experimental design, experimental and control groups in both general and psychogeriatric wards were followed for up to 22 months, using a pre-test and two post-tests by means of written questionnaires and semi-structured interviews. The results showed that the intervention appeared to be partly successful. Last post-test regression analyses revealed significant increases in a number of design characteristics of resident-oriented care. Significant increases were noticed on resident assignment, the two variables measuring the nursing process and, in the psychogeriatric experimental group, on resident-oriented tasks (p≤.01). The effects on job characteristics were limited. An indicative increase was shown in contextual job autonomy in the experimental group (p≤.05). The qualitative data derived from the interviews showed that there was still a partly task-oriented division of labour. Further, the delegation of co-ordination tasks to nursing caregivers had not yet been properly achieved. The study concludes with some theoretical and methodological reflections in the light of the findings.     

Validating the Job Crafting Questionnaire (JCRQ): A multi-method and multi-sample study

Job crafting presents a set of proactive behaviours in which employees may engage to alter the job content or their relations with others at work. In recent years, several measures have been developed to capture job crafting. In the present study, we test the validity and reliability of an existing Job Crafting Questionnaire (the JCRQ) in four studies: first, we test the scale validity of the JCRQ in a Spanish diary study (Spain, N?=?164, diary occasions 820). Second, we test the scale validity across two Western (Spain, N?=?164 and UK, N?=?109) and two Eastern cultures (China, N?=?170 and Taiwan, N?=?165). Third, we test the test–retest reliability in a Spanish three-wave longitudinal sample (N?=?191). Finally, we test the criterion validity using data from the four countries. Results confirm the presence of five independent job crafting dimensions: increasing challenging demands, decreasing social job demands, increasing social job resources, increasing quantitative demands and decreasing hindrance job demands. The JCRQ shows acceptable test–retest reliability, scale and criterion validity across the four studies.     

Moderating effects of social support in shiftworking and non-shiftworking nurses

In this study the causal relationships between work characteristics, in terms of job demands and job resources, and both targets’ and perpetrators' reports of workplace bullying, are investigated. In line with the Job Demands-Resources model and the bullying literature, we assumed that both high job demands (i.e. workload, role conflict and job insecurity) and low job resources (i.e. task autonomy, social support and skill utilization) increase bullying over time (i.e. normal causation). Our sample included 177 employees of various establishments of a large Belgian organization. The results of structural equation modelling analyses partially supported our hypothesis. As expected, we found that T1 job demands related positively to targets’ reports of bullying at T2 one year later, and that T1 job resources related negatively to T2 targets’ reports of bullying. Unexpectedly, there was no significant cross-lagged effect of T1 job demands and resources on T2 perpetrator's reports of bullying. No evidence was found for reverse causation or reciprocal effects. Overall, at least for targets, these findings support the validity of the theoretical models postulating a causal link from work characteristics to workplace bullying.     

A simple linear time approximation algorithm for multi-processor job scheduling on four processors

Multiprocessor job scheduling problem has become increasingly interesting, for both theoretical study and practical applications. Theoretical study of the problem has made significant progress recently, which, however, seems not to imply practical algorithms for the problem, yet. Practical algorithms have been developed only for systems with three processors and the techniques seem difficult to extend to systems with more than three processors. This paper offers new observations and introduces new techniques for the multiprocessor job scheduling problem on systems with four processors. A very simple and practical linear time approximation algorithm of ratio bounded by 1.5 is developed for the multi-processor job scheduling problem P ₄|fix|C _max, which significantly improves previous results. Our techniques are also useful for multiprocessor job scheduling problems on systems with more than four processors.     

Exploring work- and organization-based resources as moderators between work–family conflict,well-being,and job attitudes

Abstract

In modern Western life it is difficult to avoid work–family conflict. Therefore the resources that might reduce its negative outcomes on well-being and job attitudes come into focus. Our study contributes to the work–family conflict literature by exploring the indirect (moderator) and direct role of three work- and organization-related resources, i.e., job control, family supportive climate, organization-based self-esteem (OBSE), in the work-to-family conflict and well-being/job attitude relationship. Theoretically, the study tested the recently developed Job Demands–Resources (JD-R) model in the Scandinavian context. Data for the study were gathered from three differing Finnish organizations (health care district, ICT company, Cardboard mill; n=1252). In line with the predictions of the JD-R model, job demands (time- and strain-based work-to-family conflict) were more robustly associated with strain-based outcomes (physical symptoms), whereas job resources (job control, family supportive climate, OBSE) were more strongly linked to motivational-based outcomes (job satisfaction, organizational commitment). Both job control and family supportive climate moderated the relationships studied; high job control and family supportive climate buffered against the aversive effects of work-to-family conflict on well-being and job attitudes. These indirect effects also varied in relation to the independent, moderator, and dependent variables. However, OBSE did not operate as a buffering factor, although it showed significant direct effects. From a practical viewpoint, our findings suggest that job control and family supportive climate are resources that help employees to reduce the negative effects related to work–family conflict.     

The Demands-Control-Support model, locus of control and job dissatisfaction: a longitudinal study

The Job-Demands-Control model (Karasek, 1979) has been widely studied in the job stress field, but the results obtained are frequently contradictory. Therefore, some investigations have expanded the model by including social support and personality characteristics such as locus of control. However, results obtained with these elaborated models have not been conclusive either. The present study sets out to integrate both types of expansions by simultaneously including social support at work and the employee's locus of control in a longitudinal multi-national study among 542 administrative personnel from Belgium, England, Spain, Italy and Israel. Hierarchical moderated multiple regression showed a significant 4-way interaction term (Demands ×Control ×Social support ×Locus of control) on the change in job dissatisfaction. This effect is qualified by the interaction between job demands and control only for an internal locus of control with high social support. Contrary to the prediction of the JDC model, which posits that high control has a buffering effect on job dissatisfaction, the study result indicates a damaging effect of excess control (perceived job control and high internal locus of control), specifically in high social support situations.     

Social ties, task-related communication and first job performance of young engineers

This study investigated the relationships among social ties, task-related communication, and first industrial job performance of a group of young engineers by utilizing a cooperative (coop) engineering program as a natural study. The coop arrangement allowed the researcher to examine the work behavior of these young engineers with similar academic training who were working on comparable work assignments in the same set of organizations.The study found that the job performance of the coop engineers was related to the pattern of work- related communication but not the total number of contacts. Specifically, high performance new engineers were integrated more broadly into the interpersonal communication networks than low performance new engineers. Moreover, high performance new engineers exhibited communication patterns similar to those of high performance veteran engineers working on similar types of technical work. Social ties with the company staff was found to be related positively with job performance, but social ties with other coop engineers was found to be related negatively with job performance, a result which challenges an implicit assumption often made by researchers and managers about the organizational socialization of newcomers. Overall, this study provides an integrative framework for relating social ties and communication as key factors for understanding the job performance of young engineers and presents a methodology for assessing their organizational assimilation.     

The impact of a participatory organizational intervention on job stress in community health care institutions

The aim of the present study was to investigate the effect of a short-term participatory intervention in health care institutions in Norway on workers' control, other job characteristics, job stress, subjective health and job satisfaction. Participants (including managers and supervisors) were randomly allocated to intervention groups and to a control group. Actions to solve problems based on the employees' own perceptions of the main problems were seen as the key motivators for organizational improvement and increased control at the task and office level in the work situation. The main stressors identified by the participants in this study were lack of information, communication and respect between professions, as well as the need for professional and personal development. The participatory intervention had a positive, but limited effect on work-related stress, job characteristics, learning climate and management style, and seemed to have started a beneficial change process. There were no negative short-term effects on work-related stress and job demands. Organizational interventions may be a potential training ground for acquiring participatory skills and resources, and if sustained after the intervention period, they can have long-term effects on problem solving, job stress and employee satisfaction.     

Exploring work- and organization-based resources as moderators between work-family conflict, well-being, and job attitudes

In modern Western life it is difficult to avoid work-family conflict. Therefore the resources that might reduce its negative outcomes on well-being and job attitudes come into focus. Our study contributes to the work-family conflict literature by exploring the indirect (moderator) and direct role of three work- and organization-related resources, i.e., job control, family supportive climate, organization-based self-esteem (OBSE), in the work-to-family conflict and well-being/job attitude relationship. Theoretically, the study tested the recently developed Job Demands-Resources (JD-R) model in the Scandinavian context. Data for the study were gathered from three differing Finnish organizations (health care district, ICT company, Cardboard mill; n=1252). In line with the predictions of the JD-R model, job demands (time- and strain-based work-to-family conflict) were more robustly associated with strain-based outcomes (physical symptoms), whereas job resources (job control, family supportive climate, OBSE) were more strongly linked to motivational-based outcomes (job satisfaction, organizational commitment). Both job control and family supportive climate moderated the relationships studied; high job control and family supportive climate buffered against the aversive effects of work-to-family conflict on well-being and job attitudes. These indirect effects also varied in relation to the independent, moderator, and dependent variables. However, OBSE did not operate as a buffering factor, although it showed significant direct effects. From a practical viewpoint, our findings suggest that job control and family supportive climate are resources that help employees to reduce the negative effects related to work-family conflict.     

Transformational leadership and optimal functioning at work: On the mediating role of employees' perceived job characteristics and motivation

This study aimed to deepen our understanding of the motivational mechanisms involved in the relationship between transformational leadership (TFL) and employee functioning. Drawing on the TFL literature, the job demands–resources model and self-determination theory, we propose an integrative model that relates TFL to employee psychological health (burnout and psychological distress), attitudes (occupational commitment and turnover intention) and performance (professional efficacy, self-reported individual and objective organizational performance) through two explanatory mechanisms: perceived job characteristics (job demands and resources) and employee motivation (autonomous and controlled). This research was conducted in two occupational settings (nurses and school principals), using a distinct variable operationalization for each. Results of both studies provide support for the hypothesized model, suggesting that TFL relates to optimal job functioning (psychological health, job attitudes and performance) by contributing to favourable perceptions of job characteristics (more resources and less demands) and high-quality work motivation (more autonomous motivation and less controlled motivation) in employees. Theoretical contributions and managerial implications as well as directions for future research are presented.     

An asymptotic PTAS for batch scheduling with nonidentical job sizes to minimize makespan

Motivated by the existence of an APTAS (Asymptotic PTAS) for bin packing problem, we consider the batch scheduling problem with nonidentical job sizes to minimize makespan. For the proportional special version, i.e., there exists a fixed number α such that p _j =α s _j for every 1≤j≤n, we first present a lower bound of 3/2 for the approximation ratio and then design an APTAS. Supported by NNSF of China (No.10671108).     

Nurses: Training for new job demands

Abstract

This paper argues that both the present and future job demands faced by nurses are likely to exceed the resources of the training which is currently provided for them. This argument will be supported by reference to the authors' studies of stress in nursing, as well as a variety of other sources. The common themes underlying reactions to both present and future demands include first, awareness of high stress levels to be found amongst nurses, and second, an emphasis on communication as both the problem and as the proposed solution. Common responses to these two themes are outlined, including training in stress management, and communication training. Some of the problems and unexamined assumptions (for example that hospital management actually wants to lower stress levels and improve communication in nursing) are examined. Some suggestions are made for developing training in health care contexts, to deal more adequately with likely future demands.     

Efficient Job Scheduling Algorithms with Multi-Type Contentions

In this paper, we consider an interesting generalization of the classic job scheduling problem in which each job needs to compete not only for machines but also for other types of resources. The contentions among jobs for machines and for resources could interfere with each other, which complicates the problem dramatically. We present a family of approximation algorithms for solving several variants of the problem by using a generic algorithmic framework. Our algorithms achieve a constant approximation ratio (i.e., 3) when there is only one type of resources or certain dependency relation exists among multiple types of resources. When the r resources are unrelated, the approximation ratio of our algorithm becomes k+2, where k≤ r is a constant depending on the problem instance. As an application, we also show that our techniques can be easily applied to optical burst switching (OBS) networks to design more efficient wavelength scheduling algorithms.This research was supported in part by an IBM faculty partnership award, and an IRCAF award from SUNY Buffalo.