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Unique Variance (unique + variance)
Selected AbstractsEveryday functioning in mild cognitive impairment and its relationship with executive cognitionINTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY, Issue 3 2010Eleni Aretouli Abstract Objective Elderly persons with mild cognitive impairment (MCI) are at increased risk of dementia and functional impairments. The present study investigated the contribution of three domains of executive cognition to everyday functioning among persons with MCI. Methods 124 MCI patients and 68 cognitively normal elderly participants were administered a cognitive screening battery. These tests were used to divide patients into four subgroups (amnestic single domain, amnestic multiple domain, non-amnestic single domain, and non-amnestic multiple domain). Subjects were then administered 18 executive function tests that assess planning/problem-solving, working memory, and judgment. Performance of everyday activities and everyday cognition was rated with two informant-reported measures. Results All MCI subtypes had more difficulties in everyday activities than cognitively normal elderly participants. Multiple domain MCI patients had more functional impairments than single domain MCI patients. Contrary to our expectations, only one executive function component, working memory, contributed significantly to functional status after controlling for demographic, health-related and other cognitive factors. Conclusions Functional abilities are compromised in all MCI subtypes. Working memory may be associated with functional impairments, but general cognitive measures account for more unique variance. Copyright © 2009 John Wiley & Sons, Ltd. [source] The Convergent Validity between Self and Observer Ratings of Personality: A meta-analytic reviewINTERNATIONAL JOURNAL OF SELECTION AND ASSESSMENT, Issue 1 2007James J. Connolly The convergent validity between self and observer ratings of the Big Five dimensions of personality was examined by cumulating research findings across studies. The mean correlation corrected for coefficient , in self-ratings and inter-rater reliability in observer ratings was .46 for agreeableness (N=6359, k=53), .56 for conscientiousness (N=6754, k=58), .51 for emotional stability (N=8000, k=55), .62 for extraversion (N=7725, k=50), and .59 for openness to experience (N=5333, k=38). Results indicate that, although there is a high degree of construct overlap, both self and observer ratings have substantial unique variance. Moderator effects were analyzed. The duration of acquaintance (strangers vs close relatives) as well as observer type (peers at work vs relatives) were analyzed. Acquaintanceship had a large moderating effect whereas observer type did not moderate the level of convergence. [source] Measuring Counterproductivity: Development and Initial Validation of a German Self-Report QuestionnaireINTERNATIONAL JOURNAL OF SELECTION AND ASSESSMENT, Issue 1-2 2002Bernd Marcus This article describes the development and initial construct validation of a comprehensive self-report measure of workplace counterproductivity. The instrument contains subscales for different targets of counterproductivity (organizational and interpersonal deviance, Robinson and Bennett 1995) as well as for different forms of manifestation (absenteeism, substance use, aggression, and theft, respectively) An empirical study (N = 174), conducted in one manufacturing and one retail organization, confirmed the intended internal structure by means of confirmatory factor analysis. Counterproductivity may best be described as a higher-order behavioural construct loading on subdimensions carrying unique variance. In addition, an examination of outside variables showed that the best predictor of counterproductivity was self-control, followed by integrity, whereas cognitive ability was largely unrelated to the construct. The opposite pattern of correlations occurred for productive performance behaviours, indicating that counterproductivity is a unique construct within the performance domain. Differences and similarities between the present measure and a recent independent development by Bennett and Robinson (2000) are discussed, along with conclusions for future research on the topic. [source] Using Past Performance, Proxy Efficacy, and Academic Self-Efficacy to Predict College PerformanceJOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 11 2007Steven M. Elias This study examined the ability of prior academic performance, proxy efficacy, and academic self-efficacy to predict college academic performance. Participants (N = 202) completed a modified version of the Teacher Collective Efficacy scale (Goddard, 2001), the Academic Self-Efficacy scale (Elias & Loomis, 2000), and a demographic questionnaire. Prior performance was predictive of both academic self-efficacy beliefs and college performance. Hierarchical regression analysis indicates that academic self-efficacy beliefs explain a significant amount of unique variance beyond past performance in predicting college performance. Proxy efficacy did serve as a predictor of student academic self-efficacy, but did not serve as a predictor of college performance. Implications for instructors, as well as for future research, are discussed. [source] Teams Behaving Badly: Factors Associated With Anti-Citizenship Behavior in TeamsJOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 1 2003Craig L. Pearce We examined anti-citizenship behavior at the team level of analysis in a sample of 71 change management teams. Data were collected using a questionnaire methodology and through examination of company records. Results indicate that team leader solecism, team commitment, and perceived organizational support, but not team size, are highly correlated (p .05) with team anti-citizenship behavior (TAB). Multiple regression results suggest that team leader solecism accounts for more unique variance in TAB than the other three variables. [source] Getting even with one's supervisor and one's organization: relationships among types of injustice, desires for revenge, and counterproductive work behaviorsJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 4 2009David A. Jones I tested hypotheses derived from the agent,system model of justice specifying that, among the different types of justice, interpersonal and informational justice explain the most unique variance in counterproductive work behavior (CWB) directed toward one's supervisor, and procedural justice explains the most unique variance in CWB directed toward one's organization. I also tested whether individuals' desires for revenge against one's supervisor and one's organization mediate certain justice,CWB relationships. Results (N,=,424) provided considerable support for the study hypotheses, showing that employees tend to direct their CWB toward the source of perceived mistreatment, and that desires for revenge explain part, but not all, of the relationships between some types of injustice and CWB. Implications for theory, research, and practice are discussed. Copyright © 2008 John Wiley & Sons, Ltd. [source] A psychological contract perspective on organizational citizenship behavior,JOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 8 2002Jacqueline A-M. This study examined the contribution of the psychological contract framework to understanding organizational citizenship behavior (OCB) using survey data gathered at three measurement points over a three-year period from 480 public sector employees. Separating perceived contract breach into its two components (perceived employer obligations and inducements), the data suggest that perceived employer obligations explained unique variance in three dimensions of citizenship behavior (helping, advocacy and functional participation) beyond that accounted for by perceived employer inducements. Employees' acceptance of the norm of reciprocity moderated the relationship between employer inducements and the dimensions of advocacy and functional participation. Employees' trust in their employer moderated the relationship between perceived employer obligations and the dimensions of advocacy and functional participation. Contrary to the hypothesis, procedural or interactional justice did not moderate the relationship between employer inducements and OCB. The implications of the findings for psychological contract research are discussed. Copyright © 2002 John Wiley & Sons, Ltd. [source] THE JOINT CHOICE OF AN INDIVIDUAL'S OCCUPATION AND DESTINATION,JOURNAL OF REGIONAL SCIENCE, Issue 5 2008Christiadi ABSTRACT This study examines the relationship between an individual's occupation choice and destination choice. It portrays the relationship as an interaction between the supply of occupational skills by individuals and demand by different labor-market regions. The unusual merger of a multinomial logit model of occupational choice and the conditional logit model of destination choice in a simultaneous equation framework requires derivation of a unique variance,covariance matrix. Results indicate strong association between supply of (migration) and demand for (industry mix) an individual's occupational skills. These effects are especially strong for destinations experiencing slow economic growth, while relatively unimportant for high-growth locations. [source] Design, validation, and use of an evaluation instrument for monitoring systemic reformJOURNAL OF RESEARCH IN SCIENCE TEACHING, Issue 6 2001Kathryn Scantlebury Over the past decade, state and national policymakers have promoted systemic reform as a way to achieve high-quality science education for all students. However, few instruments are available to measure changes in key dimensions relevant to systemic reform such as teaching practices, student attitudes, or home and peer support. Furthermore, Rasch methods of analysis are needed to permit valid comparison of different cohorts of students during different years of a reform effort. This article describes the design, development, validation, and use of an instrument that measures student attitudes and several environment dimensions (standards-based teaching, home support, and peer support) using a three-step process that incorporated expert opinion, factor analysis, and item response theory. The instrument was validated with over 8,000 science and mathematics students, taught by more than 1,000 teachers in over 200 schools as part of a comprehensive assessment of the effectiveness of Ohio's systemic reform initiative. When the new four-factor, 20-item questionnaire was used to explore the relative influence of the class, home, and peer environment on student achievement and attitudes, findings were remarkably consistent across 3 years and different units and methods of analysis. All three environments accounted for unique variance in student attitudes, but only the environment of the class accounted for unique variance in student achievement. However, the class environment (standards-based teaching practices) was the strongest independent predictor of both achievement and attitude, and appreciable amounts of the total variance in attitudes were common to the three environments. © 2001 John Wiley & Sons, Inc. J Res Sci Teach 38: 646,662, 2001 [source] The Search for New Ways to Change Implicit Alcohol-Related Cognitions in Heavy DrinkersALCOHOLISM, Issue 2 2006Reinout W. Wiers This article summarizes a symposium on new ways to change implicit alcohol-related cognitions, presented at the 2005 Annual Meeting of the Research Society on Alcoholism in Santa Barbara, California, organized by Wiers and Cox. During the past few years, research has demonstrated that implicit cognitions predict unique variance in prospective alcohol use and preliminary results indicate that they also predict treatment outcomes. The central question in this symposium was how implicit cognitions can be changed and how the changes will influence behavior. Field presented data showing that an attentional bias for alcohol can be altered by attentional training: heavy drinkers who were trained not to attend to alcohol stimuli reported less craving and drank less beer than those trained to attend to alcohol stimuli. Schoenmakers used a similar, clinically relevant attentional retraining (AR) procedure, heavy drinkers were trained not to attend to alcohol pictures or received no training. After the training, the AR group attended less to the alcohol pictures than the control group. Fadardi described the Alcohol Attentional Control Training Program (AACTP), which makes alcohol drinkers aware of the automatic, cognitive determinants of their drinking and aims to help them to gain control over these processes. Data were presented to support the effectiveness of the AACTP. Palfai presented data showing that alcohol drinkers can be taught to use implementation intentions to gain control over their drinking, which may be used to automatically activate self-control skills in the presence of alcohol cues. In his discussion, Stacy pointed out the importance of recent cognitive theories that integrate attention and memory processes,theories that can help us better understand the mechanisms involved in AR. Together, the studies presented demonstrate that there are promising new ways in which implicit alcohol-related cognitions and their effects on drinking can be changed. After further refinement, these procedures might be used in clinical interventions that have not previously addressed implicit cognitive processes. [source] Psychometric Properties of the Short Index of Problems as a Measure of Recent Alcohol-Related ProblemsALCOHOLISM, Issue 9 2003Richard Feinn Background: The Drinker Inventory of Consequences (DrInC) measures overall consequences of drinking and yields five subscale scores. A short form of the DrInC, the Short Index of Problems (SIP), was developed for use when time does not permit completion of the DrInC. This study investigates the psychometric properties of the SIP. Methods: The study sample consisted of 153 problem drinkers who were participants in a placebo-controlled trial of naltrexone and brief counseling. Results: The SIP showed good internal consistency, good concurrent validity, and adequate stability. Four of the five SIP subscales contributed unique variance beyond general drinking consequences. Conclusions: The SIP is useful for measuring drinking consequences in a sample of problem drinkers, and the subscale scores can be interpreted clinically. Further research on the SIP in other populations is warranted. [source] Anxiety sensitivity and posttrauma stress symptoms in female undergraduates following a campus shooting,JOURNAL OF TRAUMATIC STRESS, Issue 6 2009Katherine L. Stephenson Participants were recruited from female undergraduate students participating in an ongoing longitudinal study at the time of a campus shooting. Eighty-five percent (N = 691) of the 812 students who were invited to participate in the current study completed questionnaires an average of 27 days following a campus shooting. In a mixed cross-sectional and longitudinal design, the cognitive and the physical concerns dimensions of postshooting anxiety sensitivity accounted for unique variance in posttrauma stress symptom severity (cross-sectional), after controlling for preshooting psychological symptoms (longitudinal). The cognitive concerns dimension showed the strongest relationship. Anxiety sensitivity also appeared to moderate the relationships of hyperarousal symptoms with reexperiencing and numbing symptoms. [source] Understanding Atrial Symptom Reports: Objective versus Subjective PredictorsPACING AND CLINICAL ELECTROPHYSIOLOGY, Issue 8 2005SAMUEL F. SEARS Background: Atrial fibrillation (AF) is the most common cardiac arrhythmia and is associated with a variety of symptoms such as dizziness, palpitations, shortness of breath, and other signs of heart failure, which in turn impact quality of life (QOL). Implantable cardioverter defibrillators with atrial therapies (ICDs-ATs) have been shown to reduce AF symptoms and improve QOL in select AF samples. Method: This study examined the strength of relationships between objective (device-detected AF events) versus subjective (emotional symptoms) data and AF symptoms (number) reported as part of the Patient Atrial Shock Survey of Acceptance and Tolerance Study (N = 96, 72% men, M age = 65, SD = 12). Depression and anxiety were assessed via the Center for Epidemiological Studies,Depression Scale and the-State Trait Anxiety Inventory. AF disease burden was measured via a number of device-detected AF episodes and the Atrial Tachyarrhythmia Symptom Severity Scale. Results: Hierarchical multiple regression analysis indicated that negative emotions accounted for a significant 13.2% of unique variance in AF symptom score (F change (1, 54) = 9.625, P = 0.003). On the other hand, the number of device-detected AF episodes accounted for non-significant 8.2% of unique variance in the AF symptom score (P = 0.167). The full model explained 25.7% of the variance in AF symptom score (F(6, 54) = 3.110, P = 0.011). Specifically, greater number of treated AF episodes (,= 0.251, P = 0.043) and higher levels of negative emotions (,= 0.369, P = 0.003) predicted greater number of reported AF symptoms. Conclusion: Therefore, psychological distress may be a significant confounding factor affecting patient's report of AF symptoms rather than the actual experience of recurrent AF episodes. [source] Cognitive complexity and marital interaction in newlywedsPERSONAL RELATIONSHIPS, Issue 2 2010BENJAMIN R. KARNEY Although newlyweds tend to be satisfied with their marriages, they nevertheless vary in their ability to resolve problems effectively. This study examined whether problem-solving effectiveness was associated with the complexity of spouses' thoughts about their problems. Newlyweds provided open-ended descriptions of marital problems and then engaged in interactions that were coded by independent observers. Results confirmed that the complexity of each spouse's descriptions accounted for unique variance in the quality of their discussions. Moreover, results supported a weak link effect, such that the thoughts of the least complex spouse accounted for additional variance, controlling for the main effects of each spouse. These results suggest that interventions to improve problem solving attend to both the structure and the content of partners' cognitions. [source] Forgiveness in marriage: The role of relationship quality, attributions, and empathyPERSONAL RELATIONSHIPS, Issue 1 2002Frank D. Fincham Italian husbands (n= 79) and wives (n= 92) from long-term marriages provided data on the role of marital quality, affective reactions, and attributions for hypothetical partner transgressions in promoting forgiveness. Structural equation modeling revealed that, as hypothesized, positive marital quality was predictive of more benign attributions that, in turn, facilitated forgiveness both directly and indirectly via affective reactions and emotional empathy. Unexpectedly, marital quality did not account for unique variance in forgiveness. Compared to husbands, wives' responsibility attributions were more predictive of forgiveness, whereas empathy was a better predictor of forgiveness in husbands than in wives. The findings are discussed in terms of their implications for the burgeoning therapeutic literature on forgiveness. [source] Hope, Social Support, and Behavioral Problems in At-Risk ChildrenAMERICAN JOURNAL OF ORTHOPSYCHIATRY, Issue 2 2005Kristine Amlund Hagen PhD This study investigated the effects of hope, social support, and stress on behavioral problems in a high-risk group of 65 children of incarcerated mothers. Children with low levels of hope had more externalizing and internalizing problems. Children who perceived less social support had more externalizing problems, and children who had experienced more life stressors reported more internalizing problems. Regression analyses indicated that hope contributed unique variance to both internalizing and externalizing behavioral problems after social support and stress were controlled. These findings suggest that being confident in one's ability to overcome challenges and having a positive outlook function as protective factors, whereas being less hopeful may place a child at risk for developing adjustment problems. Whether it is possible to foster agency and teach pathways to children with lower levels of hope is discussed. [source] Predictors of Perceived Susceptibility to Sport-Related Injury among Competitive Runners: The Role of Previous Experience, Neuroticism, and Passion for RunningAPPLIED PSYCHOLOGY, Issue 4 2009Yannick Stephan Whether individuals take steps to protect themselves against sport-related injury may depend on their perceived susceptibility to injury (Williams-Avery & MacKinnon, 1996). However, little is known about the determinants of perceived susceptibility to sport-related injury. The purpose of the present study is to identify the relations of previous experiences with injury, neuroticism, and passion with perceived susceptibility to sport-related injury among competitive runners. One hundred and seventy competitive runners reported the number of injuries sustained during the last year and completed the neuroticism scale of the NEO-PIR and the Passion Scale. Separate regression analysis revealed that previous experiences with injury, neuroticism, and obsessive passion were significant positive predictors of perceived susceptibility, whereas harmonious passion was significantly and negatively related to perceived susceptibility. When considered simultaneously, previous experiences, neuroticism, and obsessive passion explained unique variance in perceived susceptibility to sport-related injury. This study revealed that perceived susceptibility to sport-related injury is dependent on several distinct variables. Thus, to be effective, injury preventive actions aimed at runners' behaviour modification need to take into account that runners' perceived susceptibility to sport has multiple predictors. L'adoption par les individus de comportements de prévention de la blessure en sport est liée à leur vulnérabilité perçue à celle-ci (Williams-Avery & MacKinnon, 1996). Cependant, aucune étude ne s'est intéressée aux déterminants de cette dimension dans le contexte sportif. L'objectif de cette étude était d'identifier les relations entre les expériences passées avec une ou plusieurs blessures, le névrosisme, et la passion pour l'activité et la vulnérabilité perçue à la blessure chez des coureurs à pied. 170 coureurs compétitifs ont reporté le nombre de blessures contractées lors de la saison précédente, et ont répondu à l'échelle de névrosisme du NEO-PIR, et à l'échelle de passion en sport. Des analyses de régression séparées révèlent une contribution positive des expériences passées avec la blessure, du névrosisme, et de la passion obsessionnelle sur la vulnérabilité perçue, alors que la passion harmonieuse contribue négativement à cette dimension. Une analyse de régression multiple intégrant l'ensemble des prédicteurs révèle un lien significatif et positif entre les expériences passées, le névrosisme, la passion obsessionnelle et la vulnérabilité perçue à la blessure. Cette étude confirme que la perception de vulnérabilité est dépendante de dimensions variées et distinctes. Les actions de prévention de la blessure axées sur les changements de perception de vulnérabilitéà la blessure à des fins de modification des comportements doivent prendre en considération les prédicteurs de cette dimension afin d'être efficaces. [source] A social support and social strain measure for minority adolescent mothers: a confirmatory factor analytic studyCHILD: CARE, HEALTH AND DEVELOPMENT, Issue 1 2008C. B. Gee Abstract Purpose The purpose of this study is to examine the validity and structure of the Social Support Network Questionnaire (SSNQ), an interview for identifying the positive and negative aspects of individuals' social networks. Methods The sample consisted of 536 pregnant and parenting, African-American and Latina adolescents. Participants were recruited from an alternative school for pregnant and parenting adolescents in a large Midwestern city. Results Confirmatory Factor Analyses revealed the presence of three factors: perceived availability, satisfaction and social strain. All three factors demonstrated adequate internal consistency. Perceived availability and social strain were uncorrelated, implying that they are distinct dimensions. Social strain was the most consistent predictor of psychological well-being. Further, strain in relationships with the young women's male partners added unique variance to the prediction of both anxiety and depression. Conclusions The results of this study suggest that the SSNQ may be a useful tool in assessing both positive and negative aspects of pregnant and parenting adolescent mothers' social support networks. [source] | |||||||||||||||||||