On the asymmetry of losses and gains: Implications of changing work conditions for well-being.

There is sample evidence that work conditions affect employees' well-being. Losses in work quality (increased job stressors and reduced job resources) are thought to be related to deteriorations in well-being, whereas gains in work quality (reduced job stressors and increased job resources) are believed to improve well-being. The way most previous studies tested linkages between work conditions and well-being assumes that as much as a loss in work quality harms well-being, a gain in work quality results in an improvement. However, Hobfoll's conservation of resources (COR) theory argues that losses have a stronger impact than gains do. To date, this assumption still awaits a thorough empirical test. Using data from three longitudinal studies (Ns = 10,756, 579, and 2,441), we investigated the effects of changes in work conditions on well-being. Changes in work conditions were related to changes in well-being, and these relationships were weaker with longer time lags. Moreover, in line with COR theory, our analyses suggested that the effect of a loss in work quality was generally stronger than the effect of a gain. Interestingly, however, we found a more consistent pattern for the effect of certain stressors (e.g., social stressors) than others (e.g., workload). By testing a central principle of COR theory, this research advances theoretical understanding of how work affects well-being. Furthermore, by revealing that previous studies may have underestimated the detrimental effects of deteriorating work conditions and overestimated the positive effects of improved work conditions on well-being, this research also has implications for organizational interventions. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Effect size guidelines for cross-lagged effects.

Cross-lagged models are by far the most commonly used method to test the prospective effect of one construct on another, yet there are no guidelines for interpreting the size of cross-lagged effects. This research aims to establish empirical benchmarks for cross-lagged effects, focusing on the cross-lagged panel model (CLPM) and the random intercept cross-lagged panel model (RI-CLPM). We drew a quasirepresentative sample of studies published in four subfields of psychology (i.e., developmental, social-personality, clinical, and industrial-organizational). The dataset included 1,028 effect sizes for the CLPM and 302 effect sizes for the RI-CLPM, based on data from 174 samples. For the CLPM, the 25th, 50th, and 75th percentiles of the distribution corresponded to cross-lagged effect sizes of .03, .07, and .12, respectively. For the RI-CLPM, the corresponding values were .02, .05, and .11. Effect sizes did not differ significantly between the CLPM and RI-CLPM. Moreover, effect sizes did not differ significantly across subfields and were not moderated by design characteristics. However, effect sizes were moderated by the concurrent correlation between the constructs and the stability of the predictor. Based on the findings, we propose to use .03 (small effect), .07 (medium effect), and .12 (large effect) as benchmark values when interpreting the size of cross-lagged effects, for both the CLPM and RI-CLPM. In addition to aiding in the interpretation of results, the present findings will help researchers plan studies by providing information needed to conduct power analyses and estimate minimally required sample sizes. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Appreciation and illegitimate tasks as predictors of affective well-being: disentangling within- and between-person effects / El reconocimiento profesional y las tareas improcedentes como predictores del bienestar afectivo: la desagregación de los efectos intrapersonales e interpersonales

This study examines the effects of appreciation and illegitimate tasks on affective well-being. As empirical results often refer to inter-individual effects but are interpreted in terms of intra-individual effects, we try to disentangle the two. In longitudinal multilevel structural equation models with data of 308 participants, appreciation predicted affective well-being in the expected direction both on the within-level and the between-level, whereas illegitimate tasks had a stronger effect on the between level. On the within-level, appreciation buffered the effect of illegitimate tasks for two of the four facets of affective well-being. Demonstrating a convergent and pervasive effect of appreciation on both levels but diverging effects of illegitimate tasks implies that finding on one level may, but need not, work on the other level as well

Este estudio analiza los efectos del reconocimiento profesional y de las tareas improcedentes en el bienestar afectivo. Dado que los resultados empíricos a menudo aluden a los efectos interindividuales pero se interpretan como efectos intraindividuales, intentamos desintrincar ambos. En los modelos de ecuaciones estructurales longitudinales de múltiples niveles con datos de 308 participantes el reconocimiento profesional predecía el bienestar afectivo en la dirección esperada, tanto en cada nivel como entre los distintos niveles, mientras que las tareas improcedentes producían un mayor efecto entre niveles. En cada nivel el reconocimiento amortiguaba el efecto de las tareas improcedentes en dos de los cuatro aspectos del bienestar afectivo. Demostrar un efecto convergente y generalizado del reconocimiento en ambos niveles pero efectos divergentes de las tareas improcedentes implica que el resultado en un nivel puede, aunque no tiene por qué, funcionar también en el otro nivel

How effective is teamwork really? The relationship between teamwork and performance in healthcare teams: a systematic review and meta-analysis.

OBJECTIVES: To investigate the relationship between teamwork and clinical performance and potential moderating variables of this relationship. DESIGN: Systematic review and meta-analysis. DATA SOURCE: PubMed was searched in June 2018 without a limit on the date of publication. Additional literature was selected through a manual backward search of relevant reviews, manual backward and forward search of studies included in the meta-analysis and contacting of selected authors via email. ELIGIBILITY CRITERIA: Studies were included if they reported a relationship between a teamwork process (eg, coordination, non-technical skills) and a performance measure (eg, checklist based expert rating, errors) in an acute care setting. DATA EXTRACTION AND SYNTHESIS: Moderator variables (ie, professional composition, team familiarity, average team size, task type, patient realism and type of performance measure) were coded and random-effect models were estimated. Two investigators independently extracted information on study characteristics in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. RESULTS: The review identified 2002 articles of which 31 were included in the meta-analysis comprising 1390 teams. The sample-sized weighted mean correlation was r=0.28 (corresponding to an OR of 2.8), indicating that teamwork is positively related to performance. The test of moderators was not significant, suggesting that the examined factors did not influence the average effect of teamwork on performance. CONCLUSION: Teamwork has a medium-sized effect on performance. The analysis of moderators illustrated that teamwork relates to performance regardless of characteristics of the team or task. Therefore, healthcare organisations should recognise the value of teamwork and emphasise approaches that maintain and improve teamwork for the benefit of their patients.

Work stressors and partner social undermining: Comparing negative affect and psychological detachment as mechanisms.

With the mounting evidence that employees' work experiences spill over into the family domain and cross over to family members, it is important to understand the underlying mechanism through which work experiences affect the family domain and what factors may alleviate the adverse impact of work stress. Expanding previous research that mainly focused on the affect-based mechanism (negative affect), the present research investigated a resource-based mechanism (psychological detachment from work) in the relationship linking two work stressors (high workload and workplace incivility) with social undermining toward the partner at home. We also explored the relative strength of the mediating effects of the two mechanisms. In addition, we tested whether relationship satisfaction moderates the proposed effect of detachment on partner undermining. We tested these research questions using two studies with differing designs: a five-wave longitudinal study (N = 470) and a multisource study (N = 131). The results suggest that stressful work experiences affect the family domain via lack of detachment as well as negative affect, that the two pathways have comparable strength, and that high relationship satisfaction mitigates the negative effect of lack of detachment on partner undermining. In sum, this research extends the spillover-crossover model by establishing that poor psychological detachment from work during leisure time is an additional mechanism that links work and family. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Stress as Offense to Self: a Promising Approach Comes of Age.

Stress is related to goals being thwarted. Arguably, protecting one's self, both in terms of personal self-esteem and in terms of social self-esteem, is among the most prominent goals people pursue. Although this line of thought is hardly disputed, it does not play the prominent role in occupational health psychology that we think it deserves. Stress-as-Offense-to-Self theory focuses on threats and boosts to the self as important aspects of stressful, and resourceful, experiences at work. Within this framework we have developed the new concepts of illegitimate tasks and illegitimate stressors; we have investigated appreciation as a construct in its own right, rather than as part of larger constructs such as social support; and we propose that the threshold for noticing implications for the self in one's surroundings typically is low, implying that even subtle negative cues are likely to be appraised as offending, as exemplified by the concept of subtly offending feedback. Updating the first publication of the SOS concept, the current paper presents its theoretical rationale as well as research conducted so far. Research has covered a variety of phenomena, but the emphasis has been (a) on illegitimate tasks, which now can be considered as an established stressor, and (b) on appreciation, showing its importance in general and as a core element of social support. Furthermore, we discuss implications for further research as well as practical implications of an approach that is organized around threats and boosts to the self, thus complementing approaches that are organized around specific conditions or behaviors.

Testing job typologies and identifying at-risk subpopulations using factor mixture models.

Research in occupational health psychology has tended to focus on the effects of single job characteristics or various job characteristics combined into 1 factor. However, such a variable-centered approach does not account for the clustering of job attributes among groups of employees. We addressed this issue by using a person-centered approach to (a) investigate the occurrence of different empirical constellations of perceived job stressors and resources and (b) validate the meaningfulness of profiles by analyzing their association with employee well-being and performance. We applied factor mixture modeling to identify profiles in 4 large samples consisting of employees in Switzerland (Studies 1 and 2) and the United States (Studies 3 and 4). We identified 2 profiles that spanned the 4 samples, with 1 reflecting a combination of relatively low stressors and high resources (P1) and the other relatively high stressors and low resources (P3). The profiles differed mainly in terms of their organizational and social aspects. Employees in P1 reported significantly higher mean levels of job satisfaction, performance, and general health, and lower means in exhaustion compared with P3. Additional analyses showed differential relationships between job attributes and outcomes depending on profile membership. These findings may benefit organizational interventions as they show that perceived work stressors and resources more strongly influence satisfaction and well-being in particular profiles. (PsycINFO Database Record

Taking the chance: Core self-evaluations predict relative gain in job resources following turnover.

Core self-evaluations (CSE) might account for relative gains in job resources across time, especially in situations when these individual differences affect behavior that is relevant for development of job resources. This longitudinal study tests CSE as an individual resource that predicts relative gain in job resources and job satisfaction among job beginners who change or stay with their employer. A questionnaire was filled in by 513 adolescents shortly before the end of vocational training and one year later. Our results replicate previous findings suggesting that job satisfaction is affected by CSE directly and indirectly through the perception of job resources. Multi-group structural equation analysis showed that only leavers had a longitudinal indirect effect of CSE on job satisfaction at the end of vocational training via job resources during their first year of employment. Our findings imply that turnover includes opportunities to optimize one's circumstances and that CSE helps to attain resourceful jobs.

The interplay between teamwork, clinicians' emotional exhaustion, and clinician-rated patient safety: a longitudinal study.

BACKGROUND: Effectively managing patient safety and clinicians' emotional exhaustion are important goals of healthcare organizations. Previous cross-sectional studies showed that teamwork is associated with both. However, causal relationships between all three constructs have not yet been investigated. Moreover, the role of different dimensions of teamwork in relation to emotional exhaustion and patient safety is unclear. The current study focused on the long-term development of teamwork, emotional exhaustion, and patient safety in interprofessional intensive care teams by exploring causal relationships between these constructs. A secondary objective was to disentangle the effects of interpersonal and cognitive-behavioral teamwork. METHODS: We employed a longitudinal study design. Participants were 2100 nurses and physicians working in 55 intensive care units. They answered an online questionnaire on interpersonal and cognitive-behavioral aspects of teamwork, emotional exhaustion, and patient safety at three time points with a 3-month lag. Data were analyzed with cross-lagged structural equation modeling. We controlled for professional role. RESULTS: Analyses showed that emotional exhaustion had a lagged effect on interpersonal teamwork. Furthermore, interpersonal and cognitive-behavioral teamwork mutually influenced each other. Finally, cognitive-behavioral teamwork predicted clinician-rated patient safety. CONCLUSIONS: The current study shows that the interrelations between teamwork, clinician burnout, and clinician-rated patient safety unfold over time. Interpersonal and cognitive-behavioral teamwork play specific roles in a process leading from clinician emotional exhaustion to decreased clinician-rated patient safety. Emotionally exhausted clinicians are less able to engage in positive interpersonal teamwork, which might set in motion a vicious cycle: negative interpersonal team interactions negatively affect cognitive-behavioral teamwork and vice versa. Ultimately, ineffective cognitive-behavioral teamwork negatively impacts clinician-rated patient safety. Thus, reducing clinician emotional exhaustion is an important prerequisite of managing teamwork and patient safety. From a practical point of view, team-based interventions targeting patient safety are less likely to be effective when clinicians are emotionally exhausted.

Today's work experience: Precursors of both how I feel and how Ithink about my job? / La experiencia laboral hoy: ¿precursores de cómo me siento y de lo que piensoacerca de mi trabajo?

Antecedents of affective versus cognitive components of daily job satisfaction were compared. According to the affective events theory, the affective component should relate more strongly to state affect and affective work experiences than the cognitive component. In multilevel regression analyses of 280 daily reports from 40 participants, within-person variation was lower in the cognitive component (24%) than in the affective component (54%). Beyond state affect and trait affectivity, positive valence of work experiences had an incremental value only in the prediction of the affective component. The affective component is more reactive to daily work experiences than the cognitive component. Whenever the link between work and daily job satisfaction is reviewed, the components of job satisfaction measures should be considered as a moderator (AU)

Se comparan los antecedentes de los componentes afectivos frente a los cognitivos de la satisfacción laboral cotidiana. Según la teoría de los acontecimientos afectivos, el componente afectivo debería guardar una mayor relación con el afecto de estado y las experiencias laborales que el componente cognitivo. En los análisis de regresión multinivel de 280 informes diarios de 40 participantes, la variación intrasujeto era menor en el componente cognitivo (24%) que en el afectivo (54%). Más allá del afecto de estado y la afectividad de rasgo, la valencia positiva de las experiencias laborales tenía un valor incremental solo en la predicción del componente afectivo. Este es más reactivo a las experiencias laborales diarias que el componente cognitivo. Siempre que se revisa el vínculo entre trabajo y satisfacción laboral cotidiana deberían considerarse las medidas de satisfacción laboral como moderadoras (AU)

Refining the vulnerability model of low self-esteem and depression: Disentangling the effects of genuine self-esteem and narcissism.

A growing body of research supports the vulnerability model of low self-esteem and depression, which states that low self-esteem is a risk factor for depression. The goal of the present research was to refine the vulnerability model, by testing whether the self-esteem effect is truly due to a lack of genuine self-esteem or due to a lack of narcissistic self-enhancement. For the analyses, we used data from 6 longitudinal studies consisting of 2,717 individuals. In each study, we tested the prospective effects of self-esteem and narcissism on depression both separately for each construct and mutually controlling the constructs for each other (i.e., a strategy that informs about effects of genuine self-esteem and pure narcissism), and then meta-analytically aggregated the findings. The results indicated that the effect of low self-esteem holds when narcissism is controlled for (uncontrolled effect = -.26, controlled effect = -.27). In contrast, the effect of narcissism was close to zero when self-esteem was controlled for (uncontrolled effect = -.06, controlled effect = .01). Moreover, the analyses suggested that the self-esteem effect is linear across the continuum from low to high self-esteem (i.e., the effect was not weaker at very high levels of self-esteem). Finally, self-esteem and narcissism did not interact in their effect on depression; that is, individuals with high self-esteem have a lower risk for developing depression, regardless of whether or not they are narcissistic. The findings have significant theoretical implications because they strengthen the vulnerability model of low self-esteem and depression.

Illegitimate tasks as a source of work stress.

Illegitimate tasks represent a task-level stressor derived from role and justice theories within the framework of "Stress-as-Offense-to-Self" (SOS; Semmer, Jacobshagen, Meier, & Elfering, 2007). Tasks are illegitimate if they violate norms about what an employee can properly be expected to do, because they are perceived as unnecessary or unreasonable; they imply a threat to one's professional identity. We report three studies testing associations between illegitimate tasks and well-being/strain. In two cross-sectional studies, illegitimate tasks predicted low self-esteem, feelings of resentment towards one's organization and burnout, controlling for role conflict, distributive injustice and social stressors in Study 1, and for distributive and procedural/interactional justice in Study 2. In Study 3, illegitimate tasks predicted two strain variables (feelings of resentment towards one's organization and irritability) over a period of two months, controlling for initial values of strain. Results confirm the unique contribution of illegitimate tasks to well-being and strain, beyond the effects of other predictors. Moreover, Study 3 demonstrated that illegitimate tasks predicted strain, rather than being predicted by it. We therefore conclude that illegitimate tasks represent an aspect of job design that deserves more attention, both in research and in decisions about task assignments.

When general practitioners don't feel appreciated by their patients: prospective effects on well-being and work-family conflict in a Swiss longitudinal study.

BACKGROUND: Impaired well-being and high work-family conflict are critical issues among GPs. This research examined an understudied psychosocial risk factor for these outcomes, namely GPs' perception that they invest more in the relationship with their patients than what they receive in return (i.e. lack of reward in their relationship with patients). OBJECTIVE: To test the effect of lack of reward as a risk factor for poor well-being and work-family conflict among GPs. METHODS: Longitudinal study (12 months time lag). 272 GPs in Switzerland [mean age 54.5 (SD = 8.3), 73% male] volunteered to participate in the study. 270 participants completed the baseline survey and 252 completed the follow-up survey. Of these, six retired between the baseline and the follow-up survey, resulting in a sample size of 246 participants at t2. Outcome measures were burnout, sleep problems, self-perceived health and work-family conflict. RESULTS: Strength and direction of prospective effects were tested using cross-lagged models. Lack of reward was related to an increase in emotional exhaustion (ß = 0.15), sleep problems (ß = 0.16) and work-family conflict (ß = 0.19) and a decrease in self-perceived health (ß = -0.17). Effects on depersonalization and personal accomplishment were not significant. Regarding reversed effects of impaired well-being on lack of reward, emotional exhaustion (ß = 0.14) and self-perceived health (ß = -0.13) predicted future level of lack of reward. CONCLUSION: Lack of reward by patients is a risk factor in GPs' mental health.

The chicken or the egg? A meta-analysis of panel studies of the relationship between work-family conflict and strain.

Does work-family conflict predict strain, does strain predict work-family conflict, or are they reciprocally related? To answer these questions, we used meta-analytic path analyses on 33 studies that had repeatedly measured work interference with family (WIF) or family interference with work (FIW) and strain. Additionally, this study sheds light on whether relationships between WIF/FIW and work-specific strain support the popular cross-domain perspective or the less popular matching perspective. Results showed reciprocal effects; that is, that WIF predicted strain (ß = .08) and strain predicted WIF (ß = .08). Similarly, FIW and strain were reciprocally related, such that FIW predicted strain (ß = .03) and strain predicted FIW (ß = .05). These findings held for both men and women and for different time lags between the 2 measurement waves. WIF had a stronger effect on work-specific strain than did FIW, supporting the matching hypothesis rather than the cross-domain perspective.

Effect of workplace incivility on end-of-work negative affect: examining individual and organizational moderators in a daily diary study.

Although previous studies have linked workplace incivility with various negative outcomes, they mainly focused on the long-term effects of chronic exposure to workplace incivility, whereas targets' short-term reactions to incivility episodes have been largely neglected. Using a daily diary design, the current study examined effects of daily workplace incivility on end-of-work negative affect and explored potential individual and organizational moderators. Data collected from 76 full-time employees across 10 consecutive working days revealed that daily workplace incivility positively predicted end-of-work negative affect while controlling for before-work negative affect. Further, the relationship was stronger for people with low emotional stability, high hostile attribution bias, external locus of control, and people experiencing low chronic workload and more chronic organizational constraints, as compared with people with high emotional stability, low hostile attribution bias, internal locus of control, and people experiencing high chronic workload and fewer chronic organizational constraints, respectively. (PsycINFO Database Record (c) 2014 APA, all rights reserved).

What constitutes vulnerable self-esteem? Comparing the prospective effects of low, unstable, and contingent self-esteem on depressive symptoms.

A growing body of longitudinal studies suggests that low self-esteem is a risk factor for depression. However, it is unclear whether other characteristics of self-esteem, besides its level, explain incremental or even greater variance in subsequent depression. We examined the prospective effects of self-esteem level, instability (i.e., the degree of variability in self-esteem across short periods), and contingency (i.e., the degree to which self-esteem fluctuates in response to self-relevant events) on depressive symptoms in 1 overarching model, using data from 2 longitudinal studies. In Study 1, 372 adults were assessed at 2 waves over 6 months, including 40 daily diary assessments at Wave 1. In Study 2, 235 young adults were assessed at 2 waves over 6 weeks, including about 6 daily diary assessments at each wave. Self-esteem contingency was measured by self-report and by a statistical index based on the diary data (capturing event-related fluctuations in self-esteem). In both studies self-esteem level, but not self-esteem contingency, predicted subsequent depressive symptoms. Self-esteem instability predicted subsequent depressive symptoms in Study 2 only, with a smaller effect size than self-esteem level. Also, level, instability, and contingency of self-esteem did not interact in the prediction of depressive symptoms. Moreover, the effect of self-esteem level held when controlling for neuroticism and for all other Big Five personality traits. Thus, the findings provide converging evidence for a vulnerability effect of self-esteem level, tentative evidence for a smaller vulnerability effect of self-esteem instability, and no evidence for a vulnerability effect of self-esteem contingency.

Emotional exhaustion and workload predict clinician-rated and objective patient safety.

AIMS: To investigate the role of clinician burnout, demographic, and organizational characteristics in predicting subjective and objective indicators of patient safety. BACKGROUND: Maintaining clinician health and ensuring safe patient care are important goals for hospitals. While these goals are not independent from each other, the interplay between clinician psychological health, demographic and organizational variables, and objective patient safety indicators is poorly understood. The present study addresses this gap. METHOD: Participants were 1425 physicians and nurses working in intensive care. Regression analysis (multilevel) was used to investigate the effect of burnout as an indicator of psychological health, demographic (e.g., professional role and experience) and organizational (e.g., workload, predictability) characteristics on standardized mortality ratios, length of stay and clinician-rated patient safety. RESULTS: Clinician-rated patient safety was associated with burnout, trainee status, and professional role. Mortality was predicted by emotional exhaustion. Length of stay was predicted by workload. Contrary to our expectations, burnout did not predict length of stay, and workload and predictability did not predict standardized mortality ratios. CONCLUSION: At least in the short-term, clinicians seem to be able to maintain safety despite high workload and low predictability. Nevertheless, burnout poses a safety risk. Subjectively, burnt-out clinicians rated safety lower, and objectively, units with high emotional exhaustion had higher standardized mortality ratios. In summary, our results indicate that clinician psychological health and patient safety could be managed simultaneously. Further research needs to establish causal relationships between these variables and support to the development of managerial guidelines to ensure clinicians' psychological health and patients' safety.

Relationship and task conflict at work: interactive short-term effects on angry mood and somatic complaints.

Our research examined short-term within-person effects of relationship and task conflict on angry mood and somatic complaints. We assumed that conflicts of both kinds would be prospectively related to both indicators of impaired well-being, that the effect of relationship conflict would be stronger than the effect of task conflict, and that the effect of relationship conflict would be stronger when task conflict is low than when it is high. We tested our hypotheses with a daily diary study with ratings made 3 times/day for 2 weeks, involving 131 participants. We found a prospective main effect of relationship conflict on angry mood, but not on somatic complaints. In contrast, controlling for relationship conflict, task conflict was unrelated to both angry mood and somatic complaints. Supporting our assumption, task conflict moderated the effect of relationship conflict. Relationship conflict had a prospective effect on angry mood and somatic complaints that lasted until the next day if, and only if, task conflict was low.

Reciprocal effects of work stressors and counterproductive work behavior: a five-wave longitudinal study.

Previous research has clearly shown that work stressors are positively related to counterproductive work behavior (CWB). Most of these studies, however, used cross-sectional designs, which limits insight into the direction of effects. Nevertheless, it has been assumed that work stressors have a causal effect on CWB, but the role of CWB as an antecedent of work stressors has been neglected. The present study examined lagged reciprocal relationships between work stressors and CWB. We assumed that work stressors (organizational constraints and experienced incivility) are prospectively and positively related to CWB (interpersonal and organizational CWB) and that conversely CWB is prospectively and positively related to work stressors. We tested our hypotheses with a longitudinal study of 663 individuals who were assessed 5 times over an 8-month period. The results supported the possibility of a reciprocal relationship. Organizational constraints (but not experienced incivility) predicted subsequent CWB, and CWB predicted subsequent organizational constraints and experienced incivility. Because reciprocal effects point to a vicious cycle with detrimental effects of CWB to both actors and targets, the findings are not only of theoretical but also of practical importance.

Illegitimate tasks associated with higher cortisol levels among male employees when subjective health is relatively low: an intra-individual analysis.

OBJECTIVES: Illegitimate tasks refer to tasks that do not conform to what can appropriately be expected from an employee. Violating role expectations, they constitute "identity-stressors", as one's professional role tends to become part of one's identity. The current study investigated the impact of illegitimate tasks on salivary cortisol. We analyzed data on an intra-individual level, that is, by examining fluctuations in illegitimate tasks and cortisol within individuals. Furthermore, we investigated the moderating role of perceived health, expecting that illegitimate tasks evoke stronger reactions when perceived health is relatively poor. METHODS: Illegitimate tasks, salivary cortisol, and perceived health were assessed in each of three waves (time lag: 6 months) in a sample of 104 male employees. Data were analyzed by multilevel analysis using group mean centering. RESULTS: Controlling for social stressors, work interruptions, and emotional stability, the experience of more illegitimate tasks was associated with increased cortisol release if personal health resources were low compared to one's mean value of perceived health. Results cannot be explained by inter-individual differences. CONCLUSIONS: This is the first study showing that illegitimate tasks predict a biological indicator of stress, thus confirming and extending previous research on illegitimate tasks. The moderating role of perceived health confirms its importance as a personal resource, implying augmented vulnerability when perceived health is below its usual value. It is plausible to assume that increased stress reactions due to relatively poor health may further weaken available personal resources. Both avoiding illegitimate tasks and restoring personal health seem to be crucial.