Relationships among the theory of planned behavior,stages of change,and exercise behavior in older persons over a three year period

Abstract

The present study examined the relationships among the theory of planned behavior (TPB), stages of change, and exercise behavior in 131 older persons over a three year period. Participants completed a baseline questionnaire by mail that assessed attitude, perceived control, subjective norm, intention, and stage and then received a telephone call three years later in which current exercise stage and behavior were assessed. Path analyses showed that (a) TPB constructs were significant predictors of exercise stage, (b) intention mediated the effects of TPB constructs on exercise stage, and (c) exercise behavior was best predicted by intention rather than stage. Results were interpreted as providing evidence for the long term predictive validity of TPB in the exercise domain and as questioning the necessity of combining both intention and stage in a single predictive model.     

Predicting Child Restraint Device Use: A Comparison of Two Models1

This study's first objective was to apply Ajzen's theory of planned behavior (TPB) in the context of automobile child restraint device use to identify determinants of that behavior. A second objective was to test two specific hypotheses regarding the predictive role of perceived behavioral control: (a) Its inclusion should increase the proportion of variance already explained in intention by the attitudinal and normative components included in the theory of reasoned action; and (b) given the behavior under study, a model in which perception of behavioral control's influence on behavior is entirely mediated by intention, should fit the data. Subjects (N= 590) were parents driving with their 3- to 5-year-old children intercepted while entering or leaving parking lots of different public settings. The behavior of interest, child restraint device use, was rated by two independent observers. A self-report questionnaire assessing all constructs of Ajzen's model was given to the parent, who was instructed to return it by mail. Data were analyzed using LISREL VII. Results showed that perceived behavioral control and, to a lesser extent, attitude, emerged as the main determinants of behavioral intention which was itself predictive of child restraint device use. In addition, both hypotheses regarding the relation between perceived behavioral control on the one hand and intention and behavior, on the other, were supported. Discussion centered first on the mechanism through which perceived behavioral control exerts its influence, and second on the implications of the present results for the theory of reasoned action as well as for the theory of planned behavior.     

Causal Models of Physical Exercise Participation: Testing the Predictive Power of the Construct "Pressure to Change"

This study examines 2 different causal models to predict physical exercise motivation and behavior under a longitudinal perspective. The first model includes 5 latent variables that were hypothesized to have an impact on exercise intention and behavior: behavior-specific social support, exercise self-efficacy, perceived health benefits, perceived barriers, and subjective vulnerability to cardiovascular disease. The second model was based on all variables of the first model, but additionally included the new variable "pressure to change." Pressure to change was defined as the extent to which a person feels the necessity that specific personal life circumstances (e.g., health status, social relations) may not remain as they are and ought to be changed. It was hypothesized that the inclusion of health-related pressure to change would result in a better prediction of exercise intention. The proposed causal models were tested separately at the stages of exercise adoption and maintenance. Covariance structure analyses (LISREL) confirmed that pressure to change may be an important factor in the motivational process that leads to the adoption of regular physical exercise. Adding this latent variable to the basic model improved the amount of explained variance in exercise intention by 6%. Furthermore, the results did not support the assumption that cognitive control is critical especially during the acquisition of exercise behaviors, but may be less influential once the behavioral routines have been established. Our data rather indicate that regular physical exercise, even if performed on a regular basis for years, always remains a behavior that requires a high level of cognitive guidance.     

Understanding Exercise and Diet Motivation in Overweight Women Enrolled in a Weight-Loss Program: A Prospective Study Using the Theory of Planned Behavior

The purpose of this study was to prospectively examine the utility of the theory of planned behavior (TPB) constructs for exercise and diet behavior with women enrolled in a 4-week weight-loss program. Sixty-nine females participated in group exercise 3 times a week and they consumed a low-calorie diet for 1 month. They completed baseline measures of exercise behavior, demographic variables, and the TPB constructs for exercise and diet at the start of the program. Adherence to the exercise and diet was recorded, along with pre- and post-measurements of body composition. Significant decreases in body mass index, body fat percentage, and circumference measurements occurred from pre- to post-program. Hierarchical multiple regression analyses revealed that diet adherence was predicted by intention. However, the TPB constructs failed to predict exercise adherence, exercise intention, and diet intention. These results are discussed in relationship to previous research, and recommendations for future studies with this special population are highlighted.     

Sports spectator behavior: a test of the theory of planned behavior

The theory of planned behavior has been applied to sports and exercise behaviors. According to this theory, human intention to take action in a specific context is guided by three antecedents: attitude, subjective norm, and perceived behavioral control. Behavioral intention mediates the relationships between these three considerations and its ultimate performance. However, this theory has seldom been applied to the behaviors of spectators of sporting events. A sample of 269 volleyball spectators in Taiwan was studied to examine whether people's intention mediated their attitudes, subjective norms, and perceived behavioral control toward a given behavior, watching the 2010 Fédération Internationale de Volleyball World Grand Prix in Taipei. Regression analyses did not support behavioral intention as a mediator. This result is discussed in the context of planned behavior.     

Psychological predictors of eco-driving: A longitudinal study

Eco-driving has well-known positive effects on fuel economy and greenhouse-gas emissions. Moreover, eco-driving reduces road-traffic noise, which is a serious threat to the health and well-being of many people. We investigated the psychological predictors of the adoption of eco-driving from the perspective of road-traffic noise abatement. The data came from 890 car drivers who participated in a longitudinal survey over four months. Specifically, we tested the effects of the intention to prevent road-traffic noise, variables derived from the theory of planned behavior (social norm, perceived behavioral control, and attitude), and variables derived from the health action process approach (implementation intention, maintenance self-efficacy, and action control) on the intention to practice eco-driving and on eco-driving behavior. The intention to prevent road-traffic noise was not linked to the intention to practice eco-driving. The strongest predictors of the intention to practice eco-driving were attitude and perceived behavioral control. The strongest predictor of eco-driving behavior was action control. The link between behavioral intention and behavior was weak, indicating that drivers have difficulties putting their intention to practice eco-driving into action. Therefore, intervention efforts should directly address and support the transition from intention to behavior. This could be accomplished by providing reminders, which help to maintain behavioral intention, and by providing behavior feedback, which helps car drivers to monitor their behavior.     

Predicting Participation in Cancer Screening: The Role of Perceived Behavioral Control1

We examined the role played by perceived behavioral control in predicting participation in colorectal cancer screening among individuals recently informed that they were at high risk for this type of cancer. A telephone interview based primarily on the theory of reasoned action was administered to 96 high-risk individuals and 144 average-risk individuals. All participants then were sent materials needed to complete the screening test. In both groups, perceived behavioral control enhanced prediction of intention to complete the test over and above the contributions of attitude and subjective norm. In addition, perceived behavioral control had a direct effect on behavior but only in the high-risk group. Further, for high-risk subjects, knowledge about test procedures moderated the relationship of perceived behavioral control and intention to behavior, but in ways only partially consistent with theory. Finally, the model was better at predicting behavior in the average than in the high-risk group. We conclude that perceived behavioral control plays an important role in the prediction of screening behavior. Perceived behavioral control's motivational role manifests itself unambiguously through its influence on intention. The role of perceived behavioral control above and beyond its influence on intention, however, needs further study and clarification.     

Social Cognitive Predictors of Exercise Intentions Among Substance Users in Recovery

The present study examined the social-cognitive predictors of exercise intention among substance abusers in recovery. An extended version of the theory of planned behavior was used, accounting for past exercise behavior and self-esteem. Members of self-help groups in Melbourne, Australia (N = 201) completed an anonymous questionnaire. Hierarchical regression, multiple mediation, and moderation analysis were used. The findings showed that attitudes and perceived behavioral control were the strongest predictors of exercise intentions, and mediated the effects of past behavior and self-esteem. Psychological interventions to promote exercise among substance abusers should target attitudinal beliefs and build self-control skills.     

行为执行意向的理论观点及其相关研究

执行意向是指个体以行动目标为导向,通过连接情景线索和目标导向反应,建立行为意向和实际行为之间联系的中介变量。通过梳理执行意向的概念、心理联系及应用研究,发现执行意向主要与行为意向、自我协调、合作性、计划提醒、自觉性、人格等变量产生心理联系;形成执行意向的人具有克服困难,达到既定目标的积极心理状态。然而,执行意向并不总是发挥其积极效应,其与具体情景、个体差异性等有关。最后,文章从四个方面对今后研究的热点与方向进行了展望。     

Motivation is not enough: prediction of risk behavior following diagnosis of coronary heart disease from the theory of planned behavior.

Perceived behavioral control (PBC) and intention, the proximal predictors from the theory of planned behavior (TPB), were used to predict cardiovascular risk behaviors in 597 patients 1 year after diagnosis with coronary heart disease. The outcome measures were self-report measures of exercise plus objective measures of fitness (distance walked in 6 min) and cotinine-confirmed smoking cessation. In multivariate analyses incorporating both PBC and intention, PBC predicted exercise, distance walked, and smoking cessation, but intention was not a reliable independent predictor of any health behavior measured. Thus, the effective theoretical component of the TPB was PBC. Similar predictions could derive from social-cognitive theory. In coronary patients, behavioral change needs to address issues of action implementation rather than motivational factors alone.     

Attitudes, Intentions, and Behavior: A Study of Women's Participation in Collective Action

The present study tests the theories of reasoned action and planned behavior in the context of women's participation in collective action. Participants were 387 women who completed two questionnaires with an interval of 1 year. In the first questionnaire, participants were asked to provide measures of attitudinal, normative, and control factors, as well as measures of intention to participate in 4 group-related activities over the coming year. One year later in the second questionnaire, the same women provided measures of the degree to which they had actually participated in these behaviors during the course of the year. Findings showed strong relationships between attitudinal factors and intentions, and between intentions and behavior. The addition of perceived behavioral control, as specified by the theory of planned behavior, made little difference in regression analyses. Further analyses focused on the mediating role of identification as an activist. This revealed that attitudinal considerations were only important in the prediction of intention for those individuals with a weaker sense of themselves as activists. It is suggested that expectancy-value calculations may be less important in predicting the intentions of strongly committed individuals to engage in group-relevant acts.     

An Application of the Theory of Planned Behavior to Exercise Among Older Adults1

One hundred five older adults enrolled in exercise classes were recruited from local YMCAs. Exercise behavior was measured 1, 3, and 9 months after beginning the exercise class. Intentions were not a significant predictor of exercise behavior, probably because of a lack of variance; most people intended to exercise. The direct measures of attitudes, subjective norms, and perceived behavioral control, however, explained 9% of exercise behavior at 1 month. They did not significantly explain behavior at 3 and 9 months. When the indirect measure of subjective norms explained 18% of exercise behavior at 1 month. The indirect measure of perceived behavioral control accounted for 27% of the variance at 1 month and 10% at 3 months.     

Breast cancer: The intention to have a mammography and a clinical breast examination - application of the theory of planned behavior

Abstract

The purpose of these cross sectional studies was to identify the psychosocial factors explaining women's intention to have a mammography within the next two years and their intention to have a clinical breast examination (CBE) by a professional within the next year. Two random samples of women aged 40–69 years (n_a = 354, n_b = 344) completed a self-administered questionnaire that investigated theoretical constructs of the theory of planned behavior. The results of structural equation modeling showed that subjective norms and perceived behavioral control explained 81 % of the variance in intention of having a mammography. Sixty-five percent (65%) of the variance in intention of having a CBE was explained by attitude and perceived behavioral control. In conclusion, women need to be better informed, have better skills to overcome psychological and physical barriers in performing preventive breast behaviors, and promotion of preventive breast cancer methods should consider people significant for women.     

BEHAVIORAL MANAGEMENT OF EXERCISE TRAINING IN VASCULAR HEADACHE PATIENTS: AN INVESTIGATION OF EXERCISE ADHERENCE AND HEADACHE ACTIVITY

A behavioral package was used to shape and maintain the adherence of 5 subjects with vascular headache to a program of aerobic exercise training. Repeated measures of exercise behavior were examined through the use of a bidirectional changing criterion design. Repeated measures of headache activity were also collected. Results demonstrated a functional relationship between the behavioral package and exercise adherence, because all 5 subjects showed exercise behavior that matched bidirectional changing exercise criteria. The results also indicated clinically significant collateral reductions in vascular headache activity in 4 subjects. Subjects whose aerobic fitness levels were not masked by vasoactive medication also showed measurable increases in aerobic fitness. The results are discussed in terms of the methodology used to demonstrate a functional relationship between the adherence package and exercise behavior and the possible mechanism(s) by which aerobic exercise activity might affect vascular headache activity.     

Exploring psychological factors of mobile phone use while riding among motorcyclists in Vietnam

Mobile phone use while riding is one of the five most common risky behaviors of motorcycle riders in Vietnam. This study investigated motorcyclist’s mobile phone use while riding intention and behavior based on the extended Theory of Planned Behavior (TPB) framework. Based on this framework, attitude, subjective norm, perceived behavioral control, habits, and health motivation underlying the rider’s mobile phone use while riding intentions and behavior were included in a questionnaire and captured by direct and indirect measurements. Small-displacement motorcycle riders (N = 291) completed the extended TPB based questionnaire. An exploratory factor analysis technique identified the selected factors (e.g., attitude, habit, etc.). Moreover, Structural Equation Modeling results showed moderate to good fits to the observed data. Therefore, the results supported the utilization of extended TPB framework in identifying factors of mobile phone use while riding intention and behavior. Specifically, negative attitude, perceived behavioral control, and mobile phone use while riding habit related to the intention to use a mobile phone while riding of small-displacement motorcyclists. Meanwhile, habit and behavioral intention related to the behavior to use a mobile phone while riding of small-displacement motorcycle riders. Especially, the correlation between behavioral intention and self-reported behavior was very strong. This finding embraced previous research indicating that intention was a major motivational component of behavior. Based on the results, safety intervention implications for small-displacement motorcycle riders were discussed.     

The Theory of Planned Behavior and Breast Self-Examination: Distinguishing Between Perceived Control and Self-Efficacy

This paper reports an application of the theory of planned behavior (TPB) to the prediction of breast self-examination (BSE) intentions and behavior. The study also considered the distinction between perceived control and self-efficacy within the TPB and the additional predictive utility of past behavior. A sample of 95 women completed questionnaires based on the TPB and were followed up at 1 month. Support for the distinction between perceived control and self-efficacy was provided by principal components analysis. The TPB was found to be highly predictive of intention to perform BSE and subsequent BSE behavior. Regression analyses revealed self-efficacy and attitude to be predictive of intention to perform BSE. Intention, in turn, was the sole predictor of BSE at 1-month follow-up. Past behavior was found to explain additional variance in intention, but not BSE behavior at 1-month follow-up. The results are discussed in relation to the conceptual status of the perceived behavioral control construct, and the practical implications of the results are highlighted.     

Antecedents of Taiwanese adolescents' purchase intention toward the merchandise of a celebrity: the moderating effect of celebrity adoration

The purpose of the present study was to investigate the relative importance of adolescents' attitude toward an act (the degree to which the person had a favorable or unfavorable evaluation or appraisal of the act's behavior in question), perceived norm, and perceived behavioral control in predicting Taiwanese adolescents' intention to purchase the merchandise of a celebrity when they had different levels of celebrity adoration. The present results showed that the relative strengths of attitude toward the act and the perception of behavioral control in predicting purchase intention toward the merchandise of a celebrity were stronger for adolescents in the celebrity adoration group than for adolescents in the celebrity nonadoration group. On the other hand, the relative importance of the perceived norm in predicting the attitude toward the act and the purchase intention was stronger for adolescents in the celebrity nonadoration group than for adolescents in the celebrity adoration group.     

拖延行为的干预:计划行为理论和实施意向的影响

本研究以计划行为理论为理论框架,通过实验操纵实施意向,采用日记法进行为期5天的纵向追踪,考察计划行为理论的4个核心变量和实施意向如何影响拖延行为的程度及其动态过程。134名大学生在前一周末共列举了接下来5个工作日内拟完成的668项学习相关任务,随后每天报告当天的任务完成情况。多层线性模型分析结果表明:(1)行为意向中介态度和行为控制感对拖延程度的影响,主观规范影响拖延程度的直接效应显著,但经由行为意向的间接效应不显著;(2)形成实施意向能显著降低拖延程度;(3)行为控制感和实施意向加速任务完成进程,行为控制感越强,或形成实施意向,均显著加快任务完成速度。研究结果对于如何进行拖延行为的干预有一定启示和借鉴。