Biomedical subjects

Ralf Schwarzer

Publications and source records attributed to Ralf Schwarzer.

14 recordsLinked to original sources

PubMed2006

Improving fruit and vegetable consumption: a self-efficacy intervention compared with a combined self-efficacy and planning intervention.

Effects of interventions targeting self-efficacy alone or combined with action plans were examined in the context of fruit and vegetable consumption. E-mail messages were sent to a self-efficacy group, a combined self-efficacy and action planning group and a control group. At a 6-month follow-up, 200 adults reported their fruit and vegetable consumption, along with current levels of self-efficacy and planning. The two experimental groups gained equally from the interventions, as documented by changes in behavior. In both intervention groups, change in respective cognitions predicted change in fruit and vegetable consumption. Parsimonious interventions might contribute to health behavior change.

Adolescent↗

PubMed2006

Stage-specific effects of an action control intervention on dental flossing.

Health behavior interventions may have different effects when targeting individuals at different stages of change. A 'motivation' stage, during which intentions are formed, has been distinguished from a 'volition' stage, implying that the latter requires self-regulatory effort in implementing and maintaining behavior. To test this stage assumption, an action control intervention (self-monitoring tool for dental flossing) matched to the volition stage and mismatched to the motivation stage was provided to 151 university students, with follow-up measures of action control and flossing after 2 and 6 weeks. Separate regression analyses for motivational and volitional participants indicated that only volitional participants benefited from the volitional intervention. This supports the usefulness of stage assumptions and the advantage of tailoring interventions to participants who reside either in the motivational or in the volitional stage.

Adolescent↗

PubMed2006

Changes in finding benefit after cancer surgery and the prediction of well-being one year later.

Critical life events, such as cancer surgery, may result in finding some benefit in one's fate. In this longitudinal study with 117 cancer patients (73 men, 44 women) in hospitals in Berlin, we addressed three questions. (1) Do patients report benefit finding after surgery? (2) Are changes in benefit finding related to patients' well-being? (3) Is social support associated with finding benefits in cancer? Patients were interviewed and completed a questionnaire in the week before cancer surgery. They were invited to participate in the follow-up by letter with a questionnaire at one month and again at 12 months postsurgery. Benefit finding was measured by a seven-item scale assessing different facets of positive changes attributed to experiencing grave illness. Although benefit finding increased over one year, change was substantial only for those who started off at a low level. Well-being was not associated with benefit finding at any point in time. However, changes in benefit finding predicted subsequent well-being. Received support was associated with benefit finding. Changes in benefit finding as well as initial support emerged as joint predictors of well-being.

Adaptation, Psychological↗

PubMed2006

Physical activity and depressive symptoms in cardiac rehabilitation: long-term effects of a self-management intervention.

Long-term effects of a self-management intervention on physical activity and depressive symptoms were studied in 198 men and women after cardiac rehabilitation in Germany. Participants were randomly assigned to either an intervention group or a standard-care control group. The intervention group received brief self-regulatory skills training that focused on exercise planning strategies. Four and 12 months later, physical exercise levels were half a standard deviation higher in the intervention group. Depressive symptoms 12 months after discharge were almost half a standard deviation lower in the intervention group than in the control group. Mediation analyses were performed to study the potential mechanism that accounted for the reduction in depression. Perceived attainment of exercise goals, but not physical exercise itself, emerged as a mediator between the intervention and the reduction of depressive symptoms. As such attainment of personal goals appears to be of particular importance for lowering depressive symptoms during health-behavior change. Thus, self-management strategies to help patients attain their goals should be part of rehabilitation programs.

Adult↗

PubMed2006

Subjective residual life expectancy in health self-regulation.

Applying socioemotional selectivity theory to the domain of health, we examined the interplay of social-cognitive predictors of physical exercise in two groups of people who perceived their remaining lifetime as either expansive or limited (based on subjective longevity ratings). Individuals (N = 370) who were prescribed physical exercise were assessed at discharge from orthopedic rehabilitation as well as 6 and 12 months later. Multigroup structural equation modeling showed differences in latent means, interrelations of predictors, and amount of explained variance. Individuals who perceived their time as limited reported a less favorable profile on social-cognitive variables and less exercise goal attainment. We give first insights on how health self-regulation differs in these groups, and we discuss avenues for intervention based on socioemotional selectivity theory. In contrast to chronological age, subjective life expectancy can be targeted by intervention.

Adult↗

PubMed2006

Assessing attention control in goal pursuit: a component of dispositional self-regulation.

We examined the psychometric properties of the Self-Regulation Scale (SRS; Schwarzer, Diehl, & Schmitz, 1999), a measure of attention control in goal pursuit, in 2 independent studies. Study 1 included young adults (N = 443), whereas Study 2 included young, middle-aged, and older adults (N = 330). In both studies, the SRS showed good internal consistency. In Study 1, the SRS also showed satisfactory test-retest reliability over a 6-week period. We found support for the criterion validity of the SRS in terms of positive correlations with measures of general and domain-specific self-efficacy, proactive coping, and positive affect and in terms of negative correlations with depressive symptoms and negative affect. Hierarchical regression analyses showed that attention control accounted for unique portions of variance in relevant outcome variables above and beyond measures of self-efficacy and proactive coping.

Adolescent↗

PubMed2006

Support provider's appraisal detection bias and the efficacy of received support in medical students preparing for an exam.

Matching social support to the recipient's needs requires diagnostic sensitivity on the part of the provider. In particular, support needs to be responsive to the recipient's stress-related appraisals to be maximally effective. To assess the impact of bias in interpersonal stress assessment, medical students in 43 dyads reported on their own and each other's stress appraisals, social support, affect and performance during a 5-day preparation period culminating in a multiple choice examination. Less biased perceptions of loss appraisals by support providers within dyads were followed by support transactions associated with lower negative affect and better exam performance among recipients. More biased perceptions of threat appraisals were followed by increases in the recipients' negative affect. Results therefore suggest that support is more effective when the provider understands the recipient's concerns.

Adult↗

PubMed2006

The role of action control in implementing intentions during the first weeks of behaviour change.

Prevailing social cognition models consider behavioural intentions as immediate precursors of actions. This view ignores the role of more proximal self-regulatory processes, such as action control. The latter emerges after an intention has been formed and is supposed to maintain the level of intentions over time and to translate them into action. Three facets of action control were examined in terms of their predictive power for changes in intentions and for physical exercise: (a) awareness of standards, (b) self-monitoring, and (c) self-regulatory effort. A parsimonious 6-item instrument was administered to 122 cardiac patients at six weekly measurement points in time following rehabilitation. A distinction was made between the level of action control and the degree of change in action control, applying a latent growth model. While awareness of standards remained stable, the other two facets exhibited a linear change over the six-week period. Level and change were distinct predictors of physical exercise and changes in intentions. These findings emphasize the importance of self-regulatory mechanisms in the first weeks of trying to overcome a sedentary lifestyle. Action control may be a promising construct to narrow the intention-behaviour gap.

Aged↗

PubMed2006

Action plans and coping plans for physical exercise: A longitudinal intervention study in cardiac rehabilitation.

OBJECTIVES: The aim of the present study was to test two brief planning interventions designed to encourage cardiac patients to engage in regular physical exercise following discharge from rehabilitation. The interventions comprised action plans on (a) when, where, and how to act, and (b) coping plans on how to deal with anticipated barriers. DESIGN AND METHOD: An experimental longitudinal trial was conducted to test two interventions that either focused on action planning alone, or on a combination of action planning and coping planning. A total of 211 participants completed assessments at baseline and 2 months after discharge. Participants were randomly assigned to either one of the intervention groups or a standard-care control group. RESULTS: Participants in the combined planning group did significantly more physical exercise 2 months post-discharge than those in the other groups. CONCLUSIONS: The theoretical distinction between action planning and coping planning as introduced in the present study has proven useful in explaining changes in health-related behaviour. The combined planning intervention can be applied in the context of cardiac rehabilitation programmes.

Adaptation, Psychological↗

PubMed2005

Habitual self-control and the management of health behavior among heart patients.

This study examined the predictive power of habitual self-control on health behaviors among 381 heart surgery patients in Germany. Habitual self-control and other trait predictors (dispositional optimism, generalized self-efficacy beliefs, health locus of control beliefs) were assessed before and six months after surgery. Social-cognitive predictors of health behavior (behavior-specific self-efficacy and outcome beliefs, intentions) were assessed only before surgery. Outcomes were dieting, physical exercise, and smoker status before and after surgery. Compared to other trait variables, habitual self-control emerged as a superior predictor of the behavioral outcomes. Further, habitual self-control explained unique variance in dieting and physical exercise beyond proximal behavior-specific predictors (i.e., self-efficacy beliefs, intentions) that are supposed to display direct effects on behavior. Results of hierarchical linear regressions provided partial support for the assumption that habitual self-control strengthens the intention-behavior congruence. In prospective analyses predicting dieting at the 6-month follow-up an interaction between habitual self-control and dieting intentions emerged indicating that self-control supported dieting among patients with imperfect (moderate) dieting intentions only. In sum, the results suggest that habitual self-control may be a useful construct in research on health behavior management, in particular when long-term maintenance of health behavior is the target.

Adaptation, Psychological↗

PubMed2005

Multidimensional health locus of control: comments on the construct and its measurement.

In the present commentary, the theoretical construct of Multidimensional Health Locus of Control (MHLC) is described and evaluated in terms of its contributions to health psychology. This concept is compared to other control beliefs, in particular to perceived self-efficacy. It is argued that MHLC has supplied health psychology with essential insights and has offered a great deal of intellectual stimulation. Nevertheless, for some applications, different constructs might be more promising, in particular when it comes to predicting health behavior change. MHLC measurement, specifically its factorial structure, its proximity to health outcomes and health behaviors and its cultural sensitivity are addressed. Further refinement of the instrument is recommended, and the range of promising applications needs to be clearly defined.

Attitude to Health↗

PubMed2005

Long-term effects of two psychological interventions on physical exercise and self-regulation following coronary rehabilitation.

In cardiac rehabilitation programs, patients learn how to adopt a healthier lifestyle, including regular, strenuous physical activity. Long-term success is only modest despite good intentions. To improve exercise adherence, a 3-group experiment was designed that included innovative psychological interventions. All 3 groups underwent a standard care rehabilitation program. Patients in the 2 treatment groups were instructed not only to produce detailed action plans but also to develop barrier-focused mental strategies. On top of this, in 1 of these groups a weekly diary was kept for 6 weeks to increase a sense of action control. At the end of a standard cardiac rehabilitation program, 240 patients were randomly assigned to these treatment groups plus a standard care control group. Treatments resulted in more physical activity at follow-up and better adherence to recommended levels of exercise intensity. Moreover, self-regulatory skills such as planning and action control were improved by the treatments. Follow-up analyses demonstrated the mediating mechanisms of self-regulatory skills in the process of physical exercise maintenance. Findings imply that interventions targeting self-regulatory skills can enable post-rehabilitation patients to reduce behavioral risk factors and facilitate intended lifestyle changes.

Aged↗

PubMed2005

The general self-efficacy scale: multicultural validation studies.

General self-efficacy is the belief in one's competence to cope with a broad range of stressful or challenging demands, whereas specific self-efficacy is constrained to a particular task at hand. Relations between general self-efficacy and social cognitive variables (intention, implementation intentions, outcome expectancies, and self-regulation), behavior-specific self-efficacy, health behaviors, well-being, and coping strategies were examined among 1,933 respondents in 3 countries: Germany (n = 633), Poland (n = 359), and South Korea (n = 941). Participants were between 16 and 86 years old, and some were dealing with stressful situations such as recovery from myocardial events or tumor surgery. Perceived self-efficacy was measured by means of the General Self-Efficacy Scale (R. Schwarzer & M. Jerusalem, 1995). Meta-analysis was used to determine population effect sizes for four sets of variables. Across countries and samples, there is consistent evidence for associations between perceived self-efficacy and the variables under study confirming the validity of the psychometric scale. General self-efficacy appears to be a universal construct that yields meaningful relations with other psychological constructs.

Adaptation, Psychological↗

PubMed2004

Predictors of subjective age before and after cataract surgery: conscientiousness makes a difference.

This study contributes to research on subjective age by examining the interplay of felt age with health, functional limitations, and personality. Individuals undergoing cataract surgery (N=134; 38 to 92 years of age) provided data for an assessment period of 6 weeks surrounding their scheduled surgery. Conscientiousness and repeated measurements of health indicators, functional limitations, and felt age were included in the analyses. Results indicated that functional limitations may be more important to the construction of felt age than their underlying health-related causes. Moreover, conscientious participants felt younger before and after surgery. Their functional status was less dependent on health than the functional status of less conscientious participants. This moderator effect is discussed along with health-related pathways leading to felt age.

Activities of Daily Living↗