Predicting Psychologists' Intentions to Integrate Complementary and Alternative Therapies Into Their Practice

Drawing on an extended Theory of Planned Behaviour (TPB) framework, we employed a cross‐sectional design study to investigate psychologists' intentions to integrate complementary and alternative therapies (CAT) into their practice via recommending CAT to clients or referring clients to CAT practitioners. Participants were registered practicing psychologists from a range of therapeutic orientations (e.g., narrative, cognitive behavioural, psychodynamic). The psychologists were either recruited by phone, following a search of the Internet, or were contacted through their place of employment (hospitals, university counselling service). Those who agreed to participate (N = 122; n = 88 females, n = 34 males) completed a questionnaire that included standard TPB items of attitude, subjective norm, and perceived behavioural control, along with items measuring perceived risk, past behaviour, CAT knowledge, and gender. The outcome variables of interest were (a) intention to recommend CAT to clients and (b) intention to refer clients to CAT practitioners. Structural equation modelling revealed that the extended model was a good fit, explaining 69% (recommending CAT) and 51% (referring to CAT practitioners) of the variance in intentions. For both behaviours, direct paths from attitude and subjective norm to intentions were observed, with perceived risk and past behaviour influencing the TPB predictors of attitudes, subjective norm, and perceived behavioural control. The findings illustrate the role that cognitive and risk factors have on psychologists' decisions to integrate CAT into their practice. Understanding psychologists' cognitions and decisions about CAT integration forms an important basis on which to consider future changes in policy or practice.     

Analysing the Influence of Autonomous and Controlling Social Factors Within the Theory of Planned Behaviour

The aim of this study was to analyse the effects of autonomous (i.e., autonomy support from parents and peers) and controlling (i.e., social physique anxiety) social factors on future intention to exercise, integrating the distal (i.e., basic psychological needs satisfaction and self‐determined motivation) and proximal (i.e., attitudes, perceived behavioural control and subjective norms) determinants of intention defined in self‐determination theory (SDT) and the theory of planned behaviour (TPB). Self‐report questionnaires were distributed to 390 secondary school pupils (male = 218, female = 172, M_age = 15.10, standard deviation = 1.94). The results of path analysis, controlling for past behaviour of physical activity, showed that social factors predicted future intention to exercise through the influence of the distal and proximal determinants. The main contribution of the study was to provide evidence that the proximal determinants of the TPB captured the direct influence of social factors, independent of the mediating effects of psychological needs satisfaction and self‐determined motivation towards exercise. Results supported the integration of the two theories, clarifying the processes of influence of autonomous and controlling social factors within the variables of SDT and the TPB.     

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.     

Antecedents of children's physical activity intentions and behaviour: Predictive validity and longitudinal effects

Abstract

This study examined the predictive validity and time-lagged relationships in a model of children's physical activity intentions, attitudes, perceived behavioural control (PBC), behaviour and past behaviour using the Theory of Planned Behaviour (TPB; Ajzen, 1985) as a framework. In Study 1, 386 children aged 12–14 years completed measures of intentions, attitudes, subjective norm, PBC and past behaviour. Their physical activity behaviour was assessed one week later. Structural equation analyses supported the construct and predictive validity of the TPB with the exception of subjective norms which did not predict intentions. In Study 2,70 children completed measures of their physical activity attitudes, intentions, PBC and past behaviour. Attitudes, intentions, PBC and recent behaviour were re-assessed five weeks later. The cognitions demonstrated a moderate degree of stability over time and there were some cross-lagged effects between attitudes and PBC. Past behaviour demonstrated additive rather than attenuating effects. These results support the use of the TPB cognitions and past behaviour as a framework to examine children's physical activity behaviour.     

Group processes in food choices: The role of ethnic identity and perceived ethnic norms upon intentions to purchase ethnical food products

A study tested an extended Theory of Planned Behaviour (TPB) model, inclusive of measures of ethnical identification and perceived ethnic group norms, in the ethnical food purchasing domain. One hundred and thirty‐five Jamaicans, living in the Brixton neighbourhood, London, were administered a self‐reported questionnaire measuring the classical TPB components (attitudes, subjective norms, perceived behavioural control, behavioural intentions) plus three additional components: identification with the Jamaican group, perceived norms of the Jamaican group and past behaviour. Results of hierarchical multiple regressions showed that past behaviour, ethnical identification and perceived group norms explain an additional proportion of variance in intentions, independently of attitudes, subjective norms and perceived control. A two‐way interaction, between ethnical identification and perceived group norms, was detected. A stronger relation between group norms and intentions emerged among high ethnical identifiers. Theoretical and practical implications are discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

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.     

Applying the extended theory of planned behaviour to predict Chinese people's non‐remunerated blood donation intention and behaviour: The roles of perceived risk and trust in blood collection agencies

Against the backdrop of critical clinical blood shortage in China in recent years, the present research extends the theory of planned behaviour by incorporating two constructs potentially of importance in influencing non‐remunerated blood donation behaviour, namely perceived risk and individual trust in blood collection agencies to predict Chinese people's non‐remunerated blood donation intention and behaviour. A survey was conducted to measure variables of the theory of planned behaviour, and other variables such as experience of non‐remunerated blood donation, perceived risk and individual trust in blood collection agencies. Data to assess non‐remunerated blood donation behaviour were collected via phone interviews. Results of the path analysis are as follows. Subjective norm, perceived behavioural control and individual trust in blood collection agencies are all positively associated with attitudes toward non‐remunerated blood donation, explaining 46.9% of the variance in this variable. Perceived risk is negatively associated with blood donation intention, while subjective norm and attitudes toward non‐remunerated blood donation are both positively associated with blood donation intention. Together, the three variables account for 28.4% of the variance in donation intention. Both having a positive association with non‐remunerated blood donation behaviour, the combination of blood donation intention and donation experience explains 42.8% of its variance.     

Addressing the cross‐country applicability of the theory of planned behaviour (TPB): A structured review of multi‐country TPB studies

The theories of reasoned action and planned behaviour (TRA/TPB) have received substantial research interest from consumer behaviourists. One important area of interest that has not been adequately researched concerns the impact of national culture on the TRA/TPB components and interrelationships. To date, no systematic assessment of the impact of culture on the TRA/TPB model relationships has been undertaken. In order to understand the potential impact of culture on the TRA/TPB model relationships, a structured review of TRA/TPB studies is undertaken. Studies that have quantitatively applied the TRA/TPB across at least two countries within a consumption domain since 2000 are reviewed. The authors propose that two of Hofstede's cultural dimensions, individualism and power distance, may moderate the TRA/TPB relationships. The review highlights that the impact of subjective norm on intention varies most across countries, with the relationship between intention and both attitude and perceived behavioural control operating more similarly across country samples. Further, a systematic assessment of variation in the TRA/TPB model relationships via multilevel modelling shows that only the subjective norm–intention relationship varies across the countries studied. The relationship between subjective norm and intention is found to be influenced by power distance, with a stronger relationship evident in high power distance cultures. This review is the first of its kind and is of significance in addressing the emic versus etic nature of the TRA/TPB. Importantly, the article outlines relevant avenues and recommendations for future cross‐national research utilizing the TRA/TPB. Copyright © 2015 John Wiley & Sons, Ltd.     

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.     

The effect of self‐identity alongside perceived importance within the theory of planned behaviour

Self‐identity often predicts behavioural intentions after standard theory of planned behaviour (TPB) components are accounted for. However, it has been claimed this is due to conceptual similarity between self‐identity and perceived importance of the behaviour. We examined this claim within the context of recycling food waste. Participants (N = 113) completed questionnaires assessing intentions, attitude, perceived behavioural control, perceived norms, perceived importance, self‐identity, and past behaviour. Confirmatory factor analysis indicated that self‐identity and perceived importance were distinct constructs. Further, after accounting for TPB components and perceived importance, self‐identity explained a significant amount of additional variance in intentions. The present findings therefore do not support this particular argument against the predictive utility of self‐identity.     

HIV-protection through condom use: Testing the theory of planned behaviour in a community sample of heterosexual men in a high-income country

Given the increasing importance of heterosexual HIV-transmission in Europe and Switzerland, the present study tested the theory of planned behaviour (TPB) in a prospective study on the HIV-protection behaviour in a community sample of heterosexual men. The study focused on condom use in sexual encounters with new partners. Participants were 982 Swiss men between the ages of 25 and 65 who were surveyed using standardised questionnaires in two computer-assisted telephone interviews that took place in autumn 2002 and spring 2003. The TPB was able to predict condom use in sexual encounters with new and casual partners. In accordance with the theory, condom use was predicted by intention. Perceived behavioural control and attitude were significant predictors of intention, whereas subjective norm was not. Thus, in line with other studies, the present study highlighted the somewhat limited explanatory power of the theory. Further theoretical and empirical work is needed to develop extensions to the theory.     

Predicting students’ intention to smoke by theory of planned behaviour variables and parental influences across school grade levels

Differences were examined in Theory of Planned Behaviour determinants of students’ intention to smoke including parents’ attitudes towards smoking and parents’ current cigarette use among Greek students of different school grade levels. Students (N?=?763) aged 10–18 years reported their attitudes towards smoking, subjective norms, perceived behavioural control, self-identity and intention to smoke while their parents (N?=?525) reported their attitudes towards smoking and their current cigarette use. All the TPB variables increased from lower to higher school grade level. Multi-sample path analyses showed that parent's attitudes towards smoking positively predicted students’ intention to smoke only for elementary school children. Parents’ current cigarette use did not contribute significantly. Students’ attitudes, perceived behavioural control and self-identity predicted systematically intention to smoke in contrast to the subjective norm that did not contribute at all. Perceived behavioural control contributed to a higher degree in intention to smoke for senior high school students compared to the junior high school and elementary students. Self-identity contributed to a higher degree in intention to smoke for elementary compared to the junior high school students. The results of this study suggests that the determinants of smoking vary between early and late adolescence.     

Physical activity and diabetes: An application of the theory of planned behaviour to explain physical activity for Type 1 and Type 2 diabetes in an adult population sample

Physical activity (PA) plays a key role in the management of Type 1 (T1D) and Type 2 diabetes (T2D) but there are few theory-based, effective programs to promote PA for individuals with diabetes. The purpose of this study was to investigate the utility of the Theory of Planned Behaviour (TPB) in understanding PA in an adult population with T1D or T2D. A total of 2311 individuals (691 T1D; 1614 T2D) completed self-report TPB constructs of attitude, subjective norms, perceived behavioural control (PBC), intention and PA at baseline and 1717 (524 T1D; 1123 T2D) completed the PA measure again at 6-month follow-up. Multi-group Structural Equation Modelling was conducted to: (1) test the fit of the TPB structure (2) determine the TPB structural invariance between the two types of diabetes and (3) to examine the explained variances in PA and compare the strength of associations of the TPB constructs in the two types of diabetes. The TPB constructs explained ≥40% of the variance in intentions for both diabetes groups. In cross-sectional models, the TPB accounted for 23 and 19% of the variance in PA for T1D and T2D, respectively. In prospective models, the TPB explained 13 and 8% of the variance in PA for T1D and T2D, respectively. When adjusting for past PA behaviour, the impact of PBC and intention on behaviour was reduced in both groups. The findings provide evidence for the utility of the TPB for the design of PA promotion interventions for adults with either T1D or T2D.     

Predicting the travel intention to take High Speed Rail among college students

In order to understand travelers’ willingness to take Taiwan’s High Speed Rail (HSR) and its antecedents, this study adds two constructs – novelty seeking and trust – to the model of theory of planned behavior (TPB). The study collected research data from a university in northern Taiwan, resulting in an effective data of 300 subjects. Results indicate that attitude, perceived behavioral control, and subjective norm are found to have positive effects on the behavioral intention of taking HSR. Furthermore, novelty seeking and trust also have positive influences on attitude and three antecedents of the intention in taking HSR respectively. Theoretical and marketing implications are derived.     

Private self-consciousness as moderator of the importance of attitude and subjective norm: The prediction of voting

The influence of private self-consciousness on the components of Ajzen and Fishbein's attitude model (attitude and subjective norm) is analysed. The impact of past behaviour on both current behaviour and behavioural intention is also studied. This model was applied to the prediction of voting intention and reported behaviour in the Spanish Parliamentary elections held in 1989, Attitude showed stronger influence than subjective norm on behavioural intention for subjects with a higher private self-consciousness. The opposite was true for subjects having a lower private self-consciousness. Past behaviour had a significant influence on both behavioural intention and behaviour.     

Differential effects of mood on information processing: evidence from the theories of reasoned action and planned behaviour

The theories of reasoned action and planned behaviour continue to receive considerable research attention, despite criticisms of their ‘asocial’ conceptualisation and the rational decision‐making approach. Two studies were designed to assess the impact of induced mood on condom use (Study 1) and food choice (Study 2). Both studies provided support for application of the theory of reasoned action to health‐related behaviour, and for differential effects of mood on information processing. Study 1 provided support for problem‐focus theory, with attitudes (but not subjective norm) predicting intention in the negative mood condition. The opposite pattern of findings held for the positive mood condition (i.e. only subjective norm predicted intention). The results of Study 2 provided further support for the problem‐focus approach and for the inclusion of self‐identity in the theory of planned behaviour. The findings are discussed with implications for future work on mood and behavioural decision making. Copyright © 1999 John Wiley & Sons, Ltd.