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Stronger Relationships (stronger + relationships)
Selected AbstractsEffects of size and morphology on swimming performance in juvenile brown trout (Salmo trutta L.)ECOLOGY OF FRESHWATER FISH, Issue 4 2003A. F. Ojanguren Abstract,,, Our study assesses swimming capacity (speed and stamina) and possible morphometric determinants of locomotor performance of juvenile brown trout (Salmo trutta L.). We addressed these issues at the individual level to have an approach of the functional significance of intraspecific variation in morphological design. Both swimming speed and endurance time showed significant positive relationships with fish length. Size-corrected values of speed and endurance time were negatively correlated suggesting a phenotypic trade-off between burst and prolonged swimming. Size was also highly correlated with all the morphological variables measured. Therefore, we used the residuals of the regressions of those variables on fish length to remove the effect of body size. A principal components analysis (PCA) summarised the 12 morphological variables into two factors, which accounted for 44.3% of the variance. PC1 combined several measures of body depth and width, whereas PC2 represented mainly postanal length relative to abdomen length. Relationships between the scores of the two factors and size-corrected values of maximum swimming speed and endurance time were weak. PC2 showed a significant positive relationship with endurance time; that is, individuals with longer caudal regions were able to swim against water flow for longer periods of time. Stoutness (PC1) showed a marginally significant negative correlation with endurance time. The lack of stronger relationships could be because of the low morphometric variability among the test individuals, all proceeding from the same population, reared in a common environment, and measured at the same ontogenetic stage. [source] Applying DALY to assessing national health insurance performance: the relationship between the national health insurance expenditures and the burden of disease measures in IranINTERNATIONAL JOURNAL OF HEALTH PLANNING AND MANAGEMENT, Issue 2 2005Mehdi Russel Abstract The Iranian government has considered using DALYs as an indicator to prioritize health service expenditures to reduce the burden of disease for the public. A cross-sectional study was designed to compare several measures of the burden of disease with the actual amounts of national health insurance (NHI) expenditures, in one province of Iran (Semnan) for a period of 2 months (September 2000 and February 2001). Furthermore, on the basis of the research findings, a questionnaire was designed and distributed to stakeholders at local and national levels to explore their ideas about the gap between the expenditures of the diseases group and their burden. A semi-structured interview was conducted to elicit participants' views on the research findings. The results of this study have revealed that, currently, there is no strong relation between the NHI expenditures and DALY (r,=,0.41, p,=,0.09), but that there are stronger relationships between the amounts of NHI reimbursements with YLL (r,=,0.52, p,<,0.05), mortality (r,=,0.67, p,<,0.01) and hospital days (r,=,0.90, p,<,0.01). Comparing each group of disorders' DALY with the resources allocated to them (cost per DALY) it was shown that diabetes mellitus, musculoskeletal diseases, maternal conditions, sense organ disorders received considerably generous funding; and, perinatal conditions, congenital abnormalities, nutritional deficiencies were relatively under-funded. The qualitative research results showed that the majority of respondents agreed that the differences presently existing between disorders' burden and NHI expenditures cannot be justified; and, further, that reducing the overall burden of disease must be one of the most important objectives for the NHI. Copyright © 2005 John Wiley & Sons, Ltd. [source] Habitat heterogeneity overrides the species,area relationshipJOURNAL OF BIOGEOGRAPHY, Issue 4 2008András Báldi Abstract Aim, The most obvious, although not exclusive, explanation for the increase of species richness with increasing sample area (the species,area relationship) is that species richness is ultimately linked to area-based increases in habitat heterogeneity. The aim of this paper is to examine the relative importance of area and habitat heterogeneity in determining species richness in nature reserves. Specifically, the work tests the hypothesis that species,area relationships are not positive if habitat heterogeneity does not increase with area. Location, Sixteen nature reserves (area range 89,11,030 ha) in central Hungary. Methods, Four-year faunistic inventories were conducted in the reserves involving c. 70 fieldworkers and 65 taxonomists. CORINE 50,000 land-cover maps were used for calculating the heterogeneity of the reserve landscape (number of habitat types, number of habitat patches and total length of edges). Results, Large reserves were less heterogeneous than small reserves, probably because large reserves were established in large blocks of unproductive land whereas small reserves tended to be in more fertile land. In total, 3975 arthropod species were included in the analysis. The slope of the species,area relationship was positive only for Neuroptera and Trichoptera. There was no significant relationship in the other nine taxa examined (Collembola, Acari, Orthoptera, Thysanoptera, Coleoptera, Araneae, Diplopoda, Chilopoda, Diptera). The density (number of species ha,1) of all species, however, showed a positive correlation with heterogeneity. Main conclusions, The general lack of fit of species,area relationships in this study is inconsistent with most previous published studies. Importantly, and unlike many other studies, habitat heterogeneity was not correlated with reserve area in the studied system. In the absence of this source of covariation, stronger relationships were identified that suggested a fundamental link between species richness and habitat heterogeneity. The results indicate that habitat heterogeneity rather than area per se is the most important predictor of species richness in the studied system. [source] Biogeography of European land mammals shows environmentally distinct and spatially coherent clustersJOURNAL OF BIOGEOGRAPHY, Issue 6 2007H. Heikinheimo Abstract Aim, To produce a spatial clustering of Europe on the basis of species occurrence data for the land mammal fauna. Location, Europe defined by the following boundaries: 11°W, 32°E, 71°N, 35°N. Methods, Presence/absence records of mammal species collected by the Societas Europaea Mammalogica with a resolution of 50 × 50 km were used in the analysis. After pre-processing, the data provide information on 124 species in 2183 grid cells. The data were clustered using the k -means and probabilistic expectation maximization (EM) clustering algorithms. The resulting geographical pattern of clusters was compared against climate variables and against an environmental stratification of Europe based on climate, geomorphology and soil characteristics (EnS). Results, The mammalian presence/absence data divide naturally into clusters, which are highly connected spatially and most strongly determined by the small mammals with the highest grid cell incidence. The clusters reflect major physiographic and environmental features and differ significantly in the values of basic climate variables. The geographical pattern is a fair match for the EnS stratification and is robust between non-overlapping subsets of the data, such as trophic groups. Main conclusions, The pattern of clusters is regarded as reflecting the spatial expression of biologically distinct, metacommunity-like entities influenced by deterministic forces ultimately related to the physical environment. Small mammals give the most spatially coherent clusters of any subgroup, while large mammals show stronger relationships to climate variables. The spatial pattern is mainly due to small mammals with high grid cell incidence and is robust to noise from other subsets. The results support the use of spatially resolved environmental reconstructions based on fossil mammal data, especially when based on species with the highest incidence. [source] Fitness, fatness and activity as predictors of bone mineral density in older personsJOURNAL OF INTERNAL MEDICINE, Issue 5 2002K. J. Stewart Abstract. Stewart KJ, DeRegis JR, Turner KL, Bacher AC, Sung J, Hees PS, Tayback M, Ouyang P (Johns Hopkins Bayview Medical Center, Johns Hopkins University, School of Medicine, Baltimore, MD, USA). Fitness, fatness, and activity as predictors of bone mineral density in older persons. J Intern Med 2002; 252: 381,388. Objectives. To determine relationships of bone mineral density (BMD) with fitness, physical activity, and body composition and fat distribution. Design. Cross-sectional. Setting. General Clinical Research Center, Johns Hopkins Bayview Medical Center, Baltimore, Maryland. Subjects. Men (n = 38) and women (n = 46), aged 55,75 years with high normal blood pressure or mild hypertension but otherwise healthy. Methods. Aerobic fitness (oxygen uptake) on a treadmill, muscle strength by one-repetition maximum, activity by questionnaire, abdominal obesity by magnetic resonance imaging; anthropometrics, and body composition by dual energy X-ray absorptiometry (DXA) which measured total fat and lean mass, and BMD for the total skeleton, lumbar spine (L1,L4) and total hip. Results. Aerobic fitness did not correlate with BMD. Using multivariate analysis to ascertain independent contributions to the variance in BMD, in women, with adjustment for hormone replacement therapy (HRT), total skeleton BMD was independently related to muscle strength and abdominal total fat; total hip BMD to body weight; lumbar spine BMD to abdominal total fat. HRT also influenced BMD in the lumbar spine. In men, lumbar spine BMD was independently related to abdominal total fat physical activity and total hip BMD related to lower body strength. P < 0.05 for all of these correlations. Conclusions. Abdominal obesity and muscle strength emerge as predominant correlates of BMD in older persons with stronger relationships seen in women. Body weight and HRT also explained portions of the variance in BMD in women. Whether abdominal obesity is simply a marker for general obesity or has independent protective effects on bone is yet to be determined. [source] Antecedents and consequences of basic versus career enrichment benefit satisfactionJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 6 2001Gary Blau Using a sample of 250 medical technologists (MTs) over a four-year time period, this study presents initial evidence for differentiating two different facets of benefit satisfaction,basic and career enrichment. Basic benefit satisfaction exhibited stronger relationships to subsequent general benefit satisfaction, organizational withdrawal intent, and turnover behavior, while career enrichment benefit satisfaction exhibited a stronger relationship to subsequent affective organizational commitment. Copyright © 2001 John Wiley & Sons, Ltd. [source] GETTING CREDIT FOR PROACTIVE BEHAVIOR:SUPERVISOR REACTIONS DEPEND ON WHAT YOU VALUE AND HOW YOU FEELPERSONNEL PSYCHOLOGY, Issue 1 2009ADAM M. GRANT Although proactive behavior is important in organizations, it is not always appreciated by supervisors. To explain when supervisors reward proactivity with higher overall performance evaluations, we draw on attribution theory. We propose that employees' values and affect send signals about their underlying intentions, which influence supervisors' attributions about whether employees deserve credit for proactive behaviors. More specifically, we hypothesize that if employees express strong prosocial values or low negative affect, the proactive behaviors of voice, issue-selling, taking charge, and anticipatory helping will have stronger relationships with supervisors' performance evaluations. We test these hypotheses with samples of 103 managers and their direct supervisors (Study 1) and 55 firefighters and their platoon supervisors (Study 2). The hypotheses were supported in both studies, suggesting that proactive behaviors are more likely to contribute to higher supervisor performance evaluations when employees express strong prosocial values or low negative affect. [source] UNDERSTANDING THE IMPACT OF PERSONALITY TRAITS ON INDIVIDUALS' TURNOVER DECISIONS: A META-ANALYTIC PATH MODELPERSONNEL PSYCHOLOGY, Issue 2 2008RYAN D. ZIMMERMAN Historically, researchers have sought to identify environmental causes of employee turnover. This paradigm has led to the underemphasis of individual differences as being an important cause of individuals' turnover decisions. The results of the meta-analysis show that personality traits do have an impact on individuals' turnover intentions and behaviors. The trait of Emotional Stability best predicted (negatively) employees' intentions to quit, whereas the traits of Conscientiousness and Agreeableness best predicted (negatively) actual turnover decisions. A theoretically developed path model showed important direct effects from personality to intentions to quit and turnover behaviors that were not captured through job satisfaction or job performance. These direct effects indicate that employees who are low on Emotional Stability may intend to quit for reasons other than dissatisfaction with their jobs or not being able to perform their jobs well. The direct effects on turnover suggest that individuals who are low on Agreeableness or high on Openness may engage in unplanned quitting. Personality traits had stronger relationships with outcomes than did non-self-report measures of job complexity/job characteristics. [source] PREDICTORS OF OBJECTIVE AND SUBJECTIVE CAREER SUCCESS: A META-ANALYSISPERSONNEL PSYCHOLOGY, Issue 2 2005THOMAS W. H. NG Using the contest- and sponsored-mobility perspectives as theoretical guides, this meta-analysis reviewed 4 categories of predictors of objective and subjective career success: human capital, organizational sponsorship, sociodemographic status, and stable individual differences. Salary level and promotion served as dependent measures of objective career success, and subjective career success was represented by career satisfaction. Results demonstrated that both objective and subjective career success were related to a wide range of predictors. As a group, human capital and sociodemographic predictors generally displayed stronger relationships with objective career success, and organizational sponsorship and stable individual differences were generally more strongly related to subjective career success. Gender and time (date of the study) moderated several of the relationships examined. [source] Personal Goal Facilitation through Work: Implications for Employee Satisfaction and Well-BeingAPPLIED PSYCHOLOGY, Issue 2 2006Laura ter Doest Que le travail facilite la réalisation des objectifs personnels dépend de la perception de l'impact du travail sur l'atteinte de ces objectifs personnels. En accord avec la littérature sur l'autorégulation et le modèle cybernétique du stress organisationnel proposé par Edwards (1992), la facilitation de l'accès à ses objectifs personnels par le travail fut supposée en relation positive avec les attitudes relatives à l'emploi et le bien-être de l'employé. En outre, on a prédit un rapport plus étroit entre la facilitation de l'accès à ses objectifs personnels par le travail et les performances du salarié quand les buts personnels étaient fortement valorisés. Ces hypothèses ont été mises à l'épreuve à travers un questionnaire rempli par 1036 employés du secteur de la santé. D'après l'analyse de régression, la facilitation de l'accès à ses objectifs personnels par le travail expliquait une part importante de la variance du bien-être et des attitudes relatives à l'emploi, même après avoir contrôlé les caractéristiques des postes en référence au modèle de Karasek concernant les relations agents stressants,tension au travail (1979; Karasek & Theorell, 1990). L'importance des objectifs n'avait qu'une influence des plus limitées. On en conclut que la facilitation de l'accès à ses objectifs personnels par le travail offre une voie prometteuse pour explorer les attitudes liées à l'emploi et le bien-être, en complément des modèles plus traditionnels des caractéristiques de l'emploi. Personal goal facilitation through work refers to perceptions of the extent to which one's job facilitates the attainment of one's personal goals. In line with the self-regulation literature and Edwards' (1992) cybernetic model of organisational stress, personal goal facilitation through work was predicted to show positive associations with job attitudes and employee well-being. Moreover, stronger relationships between personal goal facilitation through work and employee outcomes were predicted for highly valued personal goals. These predictions were investigated in a questionnaire study of 1,036 health care employees. In regression analyses, personal goal facilitation through work accounted for substantial variance in job attitudes and well-being, even after controlling for job characteristics from Karasek's (1979; Karasek & Theorell, 1990) model of occupational stressor,strain relations. There was only very limited evidence of moderating effects of goal importance. It is concluded that personal goal facilitation through work offers a promising source of insight into job attitudes and well-being, complementing more traditional job characteristics models. [source] | |||||||||||||