Drivers' compliance with speed limits: an application of the theory of planned behavior

The theory of planned behavior (TPB; I. Ajzen, 1985) was applied to drivers' compliance with speed limits. Questionnaire data were collected for 598 drivers at 2 time points separated by 3 months. TPB variables, demographic information, and self-reported prior behavior were measured at Time 1, and self-reported subsequent behavior was measured at Time 2. In line with the TPB, attitude, subjective norm, and perceived control were positively associated with behavioral intention, and intention and perceived control were positively associated with subsequent behavior. TPB variables mediated the effects of age and gender on behavior. Prior behavior was found to moderate the perceived control-intention and perceived control-subsequent behavior relationships. Practical implications of the findings for road safety and possible avenues for further research are discussed.     

Promoting drivers' compliance with speed limits: Testing an intervention based on the theory of planned behaviour

The efficacy of a theory of planned behaviour (TPB)‐based intervention to promote drivers' compliance with speed limits was tested. Participants (N=300) were randomly assigned to an experimental condition, and received persuasive messages designed to change beliefs as specified in the TPB, or a control condition. Baseline and follow‐up (1 month post‐baseline) measures of TPB variables and behaviour were collected using postal questionnaires. Results showed that the intervention had a significant effect on one control belief, and significantly increased perceived behavioural control and reported behaviour. Mediation analyses confirmed that the control belief change generated the perceived behavioural control change and that the perceived behavioural control change generated the behaviour change. Implications for promoting road safety are discussed.     

Modelling the theory of planned behaviour and past behaviour

This paper demonstrated two modelling techniques and three interpretations for the inclusion of past behaviour in a theory of planned behaviour (TPB) framework using structural equation modelling. Model 1 examined past behaviour as either a causal influence or as an autoregressive influence on current behaviour. Model 2 demonstrated a novel approach to including past behaviour and current behaviour while preserving the tenets of the TPB, as it freed the residual correlation between past and present behaviour but not the causal path. Participants were 305 undergraduate students (mean age?=?19.42 years) who completed measures of the TPB, past exercise behaviour and current exercise behaviour at one-month follow-up. Results demonstrated the importance of a priori conceptualization of past behaviour, as the models provide differences between estimated coefficients. Subsequent interpretation and decision to use each modelling strategy depends on the research objective and theory.     

From attitudes to behaviour: Basic and applied research on the theory of planned behaviour

The present article traces the development of the theory of planned behaviour, from early research on the attitude-behaviour relationship through the theory of reasoned action. In particular, it is argued that a perceived lack of correspondence between attitude and behaviour led to examination of variables that either moderated (e.g., attitude strength, measurement correspondence) or mediated (behavioural intention) the relationship between attitudes and behaviour. Several meta-analytic reviews provide strong empirical support for the theory of planned behaviour, yet several applied and basic issues need to be resolved. The six papers that make up the remainder of this special issue address several of these issues.     

From attitudes to behaviour: Basic and applied research on the theory of planned behaviour

The present article traces the development of the theory of planned behaviour, from early research on the attitude-behaviour relationship through the theory of reasoned action. In particular, it is argued that a perceived lack of correspondence between attitude and behaviour led to examination of variables that either moderated (e.g., attitude strength, measurement correspondence) or mediated (behavioural intention) the relationship between attitudes and behaviour. Several meta-analytic reviews provide strong empirical support for the theory of planned behaviour, yet several applied and basic issues need to be resolved. The six papers that make up the remainder of this special issue address several of these issues.     

Counsellors' focus on competitive employment for people with severe mental illness: an application of the theory of planned behaviour in vocational rehabilitation programmes

Although the evidence-based Individual Placement and Support programme highlights the importance of the vocational rehabilitation (VR) counsellors' focus on competitive employment during career counselling, studies have shown that counsellors do not always target such jobs. This study examines which determinants affect the counsellors' intentions using an extended version of the Theory of Planned Behaviour. Cross-sectional data of 263 VR counsellors of three public employment services were analysed using structural equation modelling. A path model comprising attitudes, prior behaviour, and subjective and moral norms explained 69% of the variance in intentions. The findings indicate that counsellors focus more on competitive employment when they (1) view the placement in a competitive job as positive, (2) experience support and (3) have prior relevant experiences.     

The theory of planned behaviour: Reactions and reflections

The seven articles in this issue, and the accompanying meta-analysis in Health Psychology Review [McEachan, R.R.C., Conner, M., Taylor, N., & Lawton, R.J. (2011). Prospective prediction of health-related behaviors with the theory of planned behavior: A meta-analysis. Health Psychology Review, 5, 97–144], illustrate the wide application of the theory of planned behaviour [Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179–211] in the health domain. In this editorial, Ajzen reflects on some of the issues raised by the different authors. Among the topics addressed are the nature of intentions and the limits of predictive validity; rationality, affect and emotions; past behaviour and habit; the prototype/willingness model; and the role of such background factors as the big five personality traits and social comparison tendency.     

The theory of planned behaviour: reactions and reflections

The seven articles in this issue, and the accompanying meta-analysis in Health Psychology Review [McEachan, R.R.C., Conner, M., Taylor, N., & Lawton, R.J. (2011). Prospective prediction of health-related behaviors with the theory of planned behavior: A meta-analysis. Health Psychology Review, 5, 97-144], illustrate the wide application of the theory of planned behaviour [Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179-211] in the health domain. In this editorial, Ajzen reflects on some of the issues raised by the different authors. Among the topics addressed are the nature of intentions and the limits of predictive validity; rationality, affect and emotions; past behaviour and habit; the prototype/willingness model; and the role of such background factors as the big five personality traits and social comparison tendency.     

Young adults' intention to eat healthy food: Extending the theory of planned behaviour

Abstract

The present study predicts adults' intention to eat healthily, using the theory of planned behaviour (TPB) and additive and moderating effects of role identity, group norms and group identification, derived from identity theory and self categorisation theory. A total of 735, 25 years old adults participated in a mailed questionnaire survey in 1997. The TPB explained 52% of the variance in young adults' decision to eat healthily, with perceived behavioural control and subjective norms being the strongest (β= .56, p < .001) and weakest (β = .05, p < .005) determinants, respectively. Although, role identity accounted for an additional amount of 4% of the variance in behavioral intention, past behaviour did not moderate the impact of role identity on intention, as hypothesised. Neither perceived group norm nor group identification added to the prediction of intention over and above the TPB. However, group identification was found to act as a moderator on the relation between group norm and behavioural intention in the predicted direction. The wider social context seems to play a stronger role for the formation of adults' healthy eating decisions than indicated by the TPB.     

Intentions to participate in counselling among front-line,at-risk Irish government employees: an application of the theory of planned behaviour

ABSTRACT

The study set out to examine intentions to engage in counselling among at-risk Irish government employees and the differential utility of two alternative theory of planned behaviour (TPB) models of behaviour to explain intentions to participate in counselling. Individuals (N=259) employed in a front-line, at-risk occupation for the Irish government completed a TPB-based questionnaire. Quantitative analyses revealed that participants held positive to neutral intentions to participate in counselling, irrespective of gender. The original TPB model explained 49.9% of variance in intentions whereas an alternative TPB model, splitting the perceived behavioural control (PBC) construct between its internal and external control components, explained a further 8.9% of variance. Furthermore, self-efficacy was found to be the strongest predictor of intentions. This study therefore supports the use of the TPB in understanding counselling-seeking behaviour.     

Using the theory of planned behaviour to predict screening uptake in two contexts

Given current policy that decisions about screening should be based on informed choice, such decisions should reflect people's values and attitudes. This prospective study compares the attitudes and other cognitive predictors of screening uptake in two contexts: when conducted as part of a routine visit and when it is conducted at a separate, test-specific visit. It was conducted in two hospitals in England, differing in method of screening organisation. 1499 pregnant women offered serum screening for Down Syndrome completed a questionnaire assessing theory of planned behaviour constructs: attitude towards undergoing the test, subjective norms of others, perceived behavioural control and intention to undergo the test.

Intention predicted screening uptake in both screening settings, but more strongly when screening was part of a routine visit. Perceived behavioural control was not predictive of uptake, and only weakly predictive of intention in both settings. Subjective norm predicted intention more strongly when it referred to partner and friends than when it referred to health professionals, in both settings.

Attitude was more strongly predictive of intention to attend screening when screening was organised as a part of routine screening, rather than requiring a separate visit. These results suggest that offering a screening test at a routine visit compared with a separate visit is more likely to facilitated uninformed choices, given the stronger association between attitudes and intention and the absence of an association with the perceived influence of health professionals.     

Self‐schemas and the theory of planned behaviour

This paper argues that empirical, conceptual, and statistical difficulties characterise previous demonstrations that self‐schemas moderate the relationship between intentions and behaviour. A longitudinal study (n=163) was designed to overcome limitations of previous research. Theory of planned behaviour variables, past behaviour, and self‐schemas were assessed in relation to exercise. Behaviour was followed up two weeks later. Findings showed that self‐schemas moderated the intention–behaviour relation such that schematics were more likely to enact their intentions to exercise compared to unschematics. Evidence suggested that the importance dimension of self‐schema measures was responsible for the moderator effect. Self‐schemas were also associated with improved prediction of behavioural intentions after controlling for the other predictors. Copyright © 2000 John Wiley & Sons, Ltd.     

Augmenting the theory of planned behaviour: Motivation to provide practical assistance and emotional support to parents

Abstract

Surveys indicate that the highest proportion of people receiving informal care are parents (Green, 1988), yet a literature search showed that psychological studies of motivation to care for parents are limited. The present study utilised an augmented model of the theory of planned behaviour (Ajzen, 1985) including measures of anticipated regret and carer self-concept, to examine individuals' motivations to provide practical assistance and emotional support to their parents. Intention to provide emotional support was predicted by the theory of planned behaviour constructs, while intention to provide practical assistance was predicted by subjective norm and perceived behavioural control but not by attitude. Anticipated regret substantially improved prediction of both types of behavioural intention. These findings indicate that providing practical assistance and emotional support are motivated behaviours, governed by both rational and emotional factors, suggesting that future research may benefit from adopting a broader perspective based upon social psychological theory     

Predicting intentions to text and call while driving using the theory of planned behaviour

There is extensive evidence that using a mobile phone while driving causes degradation in driving performance, and thereby results in reduced safety on the road. The present study examined intentions to use mobile phones while driving using the Theory of Planned Behaviour (TPB). A total of 212 Ukrainian drivers (mean age = 35 years SD = 10 years; males = 82%) completed a survey that included measures of the TPB components related to intentions to send or read text messages or to make or receive handheld phone calls across two different scenarios; one where they were running late, and the other when they were not in a hurry. Measures of the frequency of mobile phone use were also collected. The results showed that 63% of the sample reported using a mobile phone while driving at least daily, with the most frequent types of usage being making and answering a phone call with a handheld device. The most consistent predictor of intentions to interact with a mobile phone while driving was having a positive attitude towards doing so. Perceived behavioural control was also significantly and positively associated with mobile phone use while driving, but only a small number of associations were found with subjective norms. Our results suggest that intentions to interact with mobile phones while driving may be context specific.     

Sleep hygiene behaviours: an application of the theory of planned behaviour and the investigation of perceived autonomy support, past behaviour and response inhibition

This study investigated the sleep hygiene behaviour of university students within the framework of the Theory of Planned Behaviour (TPB [Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179-211.]), and examined the predictive validity of additional variables including perceived autonomy support, past behaviour and response inhibition. A total of 257 undergraduate students from an Australian university were administered two online questionnaires at two time points. At time 1, participants completed the TPB questionnaire and the Go/NoGo task as a measure of response inhibition. A week later at time 2, participants completed a questionnaire measuring the performance of sleep hygiene behaviours. Multiple and hierarchical regression analyses showed that the TPB model significantly predicted intention and behaviour. Although intention and perceived behavioural control were statistically significant in predicting behaviour, past behaviour and response inhibition accounted for more variance when added to the TPB model. Subjective norm was found to be the strongest predictor of intention implying the importance of normative influences in sleep hygiene behaviours. Response inhibition was the strongest predictor of behaviour, reinforcing the argument that the performance of health protective behaviours requires self-regulatory ability. Therefore, interventions should be targeted at enhancing self-regulatory capacity.     

Sleep hygiene behaviours: An application of the theory of planned behaviour and the investigation of perceived autonomy support,past behaviour and response inhibition

This study investigated the sleep hygiene behaviour of university students within the framework of the Theory of Planned Behaviour (TPB [Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179–211.]), and examined the predictive validity of additional variables including perceived autonomy support, past behaviour and response inhibition. A total of 257 undergraduate students from an Australian university were administered two online questionnaires at two time points. At time 1, participants completed the TPB questionnaire and the Go/NoGo task as a measure of response inhibition. A week later at time 2, participants completed a questionnaire measuring the performance of sleep hygiene behaviours. Multiple and hierarchical regression analyses showed that the TPB model significantly predicted intention and behaviour. Although intention and perceived behavioural control were statistically significant in predicting behaviour, past behaviour and response inhibition accounted for more variance when added to the TPB model. Subjective norm was found to be the strongest predictor of intention implying the importance of normative influences in sleep hygiene behaviours. Response inhibition was the strongest predictor of behaviour, reinforcing the argument that the performance of health protective behaviours requires self-regulatory ability. Therefore, interventions should be targeted at enhancing self-regulatory capacity.     

Statistical guidelines for studies of the theory of reasoned action and the theory of planned behaviour

Abstract

We identify potential problems in the statistical analysis of social cognition model data, with special emphasis on the theories of reasoned action (TRA) and planned behaviour (TPB). Some statistical guidelines are presented for empirical studies of the TRA and the TPB based upon multiple linear regression and structural equation modelling (SEM). If the model is tested using multiple regression, the assumptions of this technique must be considered and variables transformed if necessary. Adjusted R² (not R²) should be used as a measure of explained variance and semipartial correlations are useful in assessing each component's unique contribution to explained variance. R² is not an indicator of model adequacy and residuals should be examined. Expectancy-value variables that are the product of expectancy and value measures represent the interaction term in a multiple regression and should not be used. SEM approaches make explicit the assumptions of unidimensionality of constructs in the TRA/TPB, assumptions that might usefully be challenged by competing models with multidimensional constructs. Finally, statistical power and sample size should be considered for both approaches. Inattention to any of these aspects of analysis threatens the validity of TRA/TPB research.     

Predictors of physical activity among rural and small town breast cancer survivors: An application of the theory of planned behaviour

The primary objective of this study was to investigate the utility of the two-component theory of planned behaviour (TPB) in understanding physical activity intentions and behaviour in rural and small town breast cancer survivors. The secondary objective was to elicit the most common behavioural, normative and control beliefs of rural and small town survivors regarding physical activity. Using a cross-sectional survey design, 524 rural and small town breast cancer survivors completed a mailed survey that assessed physical activity and TPB variables. Physical activity intention explained 12% of the variance in physical activity behaviour (p?相似文献   

The influences of intrinsic motivation on execution of social behaviour within the theory of planned behaviour

The present study examined the utility of two forms of measurement of intrinsic motivation in increasing the predictive validity of the theory of planned behaviour. Self‐report questionnaires were administered to school pupils (n = 174), University students (n = 129) and adults (n = 157). The data were analysed using confirmatory factor analysis and regression analysis. Confirmatory analysis supported discriminant validity between Forms A and B measures of intrinsic motivation. In addition, hierarchical regression analysis demonstrated that Form B measure of intrinsic motivation increased effectiveness of the theory of planned behaviour in predicting intentions and social behaviour. Further, the regression analysis showed that age and past behaviour did not reduce the effects observed for intrinsic motivation. It is recommended that intrinsic motivation could increase the predictive utility of the theory of planned behaviour. Copyright © 2006 John Wiley & Sons, Ltd.