计划行为理论述评

计划行为理论是社会心理学中最著名的态度行为关系理论,该理论认为行为意向是影响行为最直接的因素,行为意向反过来受态度、主观规范和知觉行为控制的影响。计划行为理论在国外已被广泛应用于多个行为领域的研究,并被证实能显著提高研究对行为的解释力和预测力。文章对这一理论进行了全面概述,包括理论的提出、内涵、测量方法以及理论研究的新进展,并指出了理论仍存在的问题和今后的研究方向     

A Tale of Two Cities: Predicting Homeless People's Uptake of Outreach Programs in London and New York

Two studies involved structured interviews with 203 homeless people to examine the impact of sociodemographic variables, prior behavior, and the theory of planned behavior (TPB) variables, attitudes, subjective norms, perceived behavioral control, and intention, on uptake of outreach services. Study 1 was conducted in London, and Study 2 involved a comparable sample in New York. In line with previous research, the psychological variables accounted for more variance than the sociodemographic variables, and there was no evidence that the effects of TPB variables were moderated by sociodemographics. In London intentions and behavior were most affected by perceived control and subjective norms. In New York they were most affected by perceived control and attitude. These differences may be attributable to different institutional structures and opportunities for service uptake in the two cities. Sensitivity of the TPB to social context and implications for intervention strategies are discussed in light of these differences.     

The Importance of Attitudes in the Prediction of College Students' Intentions to Drink

Fishbein's (1967, 1980) theory of reasoned action was used to test the relative importance of attitudes and subjective norms in predicting undergraduate students' intentions to perform 3 different types of social drinking actions: avoiding drinking, drinking enough to get a slight buzz, and drinking enough to get drunk. A multiple regression paradigm was used to determine the relative effectiveness of attitudes and subjective norms in predicting intentions to perform each of the 3 drinking behaviors. Although attitudes were consistently found to be better predictors of intentions than were subjective norms, the strength of the attitude-intention relation varied widely across the 3 actions. In particular, the attitude-intention correlation was strongest for "drinking enough to get drunk." Findings also suggest that subjective norms, previous behavior, and perceived behavioral control are not important variables for predicting this behavior.     

Alcohol Consumption and the Theory of Planned Behavior: An Examination of the Cognitive Mediation of Past Behaviorid

This study examined the predictive power of the theory of planned behavior (TPB) in explaining alcohol consumption in 3 prospective samples of students ( Ns = 178. 176. and 159). Generally, the TPB performed well. with attitudes, subjective norms and perceived behavioral control (PBC) explaining between 28% and 46% of the variability in intentions. Intentions and PBC explained between 12% and 50% of the variability in behavior. Measures of self-identity as a "drinker" and past behavior contributed to predictions of intentions over and above the contribution of attitudes. subjective norms. and PBC. Measures of past behavior but not self-identity consistently contributed to predictions of behavior over and above the contributions from intentions and PBC. The direct relationship between past behavior and intention and between past behavior and behavior (independent of the TPB variables or self-identity) could not be attributed to common method variance.     

Having Casual Sex: Additive and Interactive Effects of Alcohol and Condom Availability on the Determinants of Intentions

The impact of alcohol, condom availability, and gender on intentions to engage in casual sex and its antecedents was investigated. Students ( N = 384) who were or were not intoxicated with alcohol completed measures based on the theory of planned behavior (TPB) in relation to having casual sex in a scenario. The scenario described sex between 2 individuals not in a relationship and manipulated the consumption of alcohol of the sexual partners and availability of condoms. The data were supportive of the TPB: Intentions were predictable from attitudes, subjective norms, and perceived behavioral control (PBC). Results also support the inclusion of measures of past behavior and anticipated affective reactions, but not self-identity or moral norms as predictors of intentions. Alcohol in the scenario and condom availability increased intentions to have sex. There were also several interaction effects. Implications for using the TPB to understand sexual behaviors under the influence of alcohol are discussed.     

Organ donation intentions and behaviors: application and extension of the theory of planned behavior

Organ donation intentions and behaviors were investigated using a traditional and extended theory of planned behavior (TPB). In study 1, attitudes, subjective norms, and perceived behavioral control were associated with intentions to engage in donation behaviors in a student sample (all p ≤ .02), and intentions significantly predicted behavior 2 months later (p < .001). Study 2 utilized a community sample of Catholic, Jewish, and Muslim individuals. Measures of affect and religious attitudes were added to the traditional TPB, increasing the variance in intentions accounted for by the model, F(7, 181) = 6.94, p < .001. The studies support the use of an extended TPB in predicting donation‐related intentions and behaviors and suggest potential targets of interventions to promote donation.     

Mental Health Services Use Intentions Among Canadian Military Recruits

Identifying the factors associated with mental health services use (MHSU) is an important step in developing strategies to improve services access and delivery. The aims of the present study were to (a) identify personality and individual difference characteristics associated with MHSU intentions within the framework of the Theory of Planned Behavior (TPB) and (b) explore complex relationships that might exist between these characteristics and determinants of MHSU intentions identified in TPB, including attitudes, subjective norms, and perceived behavioral control. Data for 244 Canadian Armed Forces recruits who completed a MHSU questionnaire following mental health training were linked to personality data collected earlier. Multivariate analyses showed that the relationship between agreeableness and MHSU intentions was mediated by instrumental attitudes and subjective norms. The relationship between hardiness and MHSU intentions was mediated by subjective norms and self-efficacy. Findings suggest it may be worthwhile to consider mental health education initiatives to improve MHSU.     

The role of self-efficacy in predicting rule-following behaviors in shelters for homeless youth: a test of the theory of planned behavior

Through a prospective study of 70 youths staying at homeless-youth shelters, the authors tested the utility of I. Ajzen's (1991) theory of planned behavior (TPB), by comparing the constructs of self-efficacy with perceived behavioral control (PBC), in predicting people's rule-following behavior during shelter stays. They performed the 1st wave of data collection through a questionnaire assessing the standard TPB components of attitudes, subjective norms, PBC, and behavioral intentions in relation to following the set rules at youth shelters. Further, they distinguished between items assessing PBC (or perceived control) and those reflecting self-efficacy (or perceived difficulty). At the completion of each youth's stay at the shelter, shelter staff rated the rule adherence for that participant. Regression analyses revealed some support for the TPB in that subjective norm was a significant predictor of intentions. However, self-efficacy emerged as the strongest predictor of intentions and was the only significant predictor of rule-following behavior. Thus, the results of the present study indicate the possibility that self-efficacy is integral to predicting rule adherence within this context and reaffirm the importance of incorporating notions of people's perceived ease or difficulty in performing actions in models of attitude-behavior prediction.     

Can the theory of planned behavior explain patterns of health behavior change?

This article tested the ability of the theory of planned behavior (TPB) to predict patterns of behavior change associated with health screening. Attitudes, subjective norms, perceived behavioral control, and intentions were used to predict objective measures of attendance 1 month and 13 months later among participants who had never previously been screened (N = 389). Findings showed that the TPB predicted attendance on each occasion and also predicted frequency of attendance. However, the model was unable to reliably distinguish among consistent attendees, participants who delayed attending, and participants who initially attended but relapsed. Thus, the TPB needs to be extended to understand behaviors that must be performed promptly and repeatedly for health benefits to accrue.     

Factors Influencing Ethical Intentions Among Future Accounting Professionals in the Caribbean

Ethical decision-making is an important function among accountants. This paper sought to determine the factors influencing the ethical intentions of future accounting professionals. Specifically, this study tested the applicability of the theory of reasoned action (TRA), theory of planned behavior (TPB) and the extended model of the theory of planned behavior (ETPB) in predicting accounting students’ intentions to act unethically (breaching confidentiality and charging expenses). Data was collected via a survey questionnaire from 298 accounting students at a Caribbean university. Results revealed that the independent variables (attitudes, subjective norms, perceived behavioral control and moral obligation) significantly predicted students’ intentions to breach confidentiality and charge personal expenses. Our findings show that the ETPB is a good predictor of ethical intentions among future accounting professionals.     

Extending the Theory of Planned Behavior: A Review and Avenues for Further Research

This paper describes and reviews the theory of planned behavior (TPB). The focus is on evidence supporting the further extension of the TPB in various ways. Empirical and theoretical evidence to support the addition of 6 variables to the TPB is reviewed: belief salience measures, past behavior/habit, perceived behavioral control (PBC) vs. self-efficacy, moral norms, self-identity, and affective beliefs. In each case there appears to be growing empirical evidence to support their addition to the TPB and some understanding of the processes by which they may be related to other TPB variables, intentions, and behavior. Two avenues for expansion of the TPB are presented. First, the possibility of incorporating the TPB into a dual-process model of attitude–behavior relationships is reviewed. Second, the expansion of the TPB to include consideration of the volitional processes determining how goal intentions may lead to goal achievement is discussed.     

A test of theory of planned behavior in Korea: participation in alcohol-related social gatherings

Two studies are reported using the theory of planned behavior (TPB) to predict and explain joining and not joining alcohol-related social gatherings among Korean undergraduates in various engineering majors. Specifically, considering that the attitudinal component of TPB is behavioral-outcome-based, the current study investigated whether the outcomes of engaging in a behavior and of not engaging in a behavior would similarly predict intentions to engage in a behavior and intentions to not engage in a behavior. The current study also examined whether intentions to engage and intentions to not engage would be significantly related to self-reported behavior a week later. Participants in Study 1 reported TPB components (attitudes toward behavior, subjective norms, perceived behavioral control, and behavioral intentions) concerning joining alcohol-related social gatherings. Participants in Study 2 reported TPB components concerning not joining alcohol-related social gatherings. Additionally, a week later, the participants in both studies reported their participation in alcohol-related social gatherings from the past week. Generally, the results showed that the TPB components were significantly associated with undergraduates' intentions to join and intentions to not join. Specifically, conversation-related attitudes and senior-junior relationship-related attitudes were significantly related to intentions to join, and only group-related attitudes were significantly related to intentions to not join. Intentions to join and intentions to not join were not significantly related to self-reported behavior of joining alcohol-related social gatherings a week later. The findings from the current research provide some evidence that joining or not joining alcohol-related social gatherings may not be mere behavioral opposites, predictable by the presence or absence of the same behavioral outcomes. These two aspects of the behavior may require assessment of different behavioral outcomes or different assessments of the same behavioral outcomes.     

Stress and the Theory of Planned Behavior: Understanding Healthy and Unhealthy Eating Intentions

Unhealthy and healthy eating intentions are predicted in a sample of 154 university students by the theory of planned behavior variables, in interaction with life stress. Specifically, subjective norms and perceived behavioral control (PBC) are shown to interact with life stress in relation to intentions to eat unhealthy foods, such that at high stress, the effects of subjective norms and PBC are attenuated. Implications are discussed for studies involving the planned behavior model and the study of life stress and unhealthy eating, for the theory of planned behavior more broadly, as well as for interventions targeting university students' eating intentions.     

Predicting and understanding behavioral volitions: the interplay between goals and behaviors

In traditional attitude research behavioral volitions have been usually considered in isolation from the broader context that justify their formation. Most behaviors are functional to goal achievement and can be better understood and predicted by considering relevant constructs at the goal level. The interplay between behaviors and goals is the focus of this study. Constructs specified by the Theory of Planned Behavior (TPB) are examined together with constructs proposed by the Model of Goal‐directed Behavior (MGB) and two further goal constructs (goal desires and goal perceived feasibility). These theoretical ideas are tested on a sample of 104 students having a goal for body weight regulation or for studying effort. The results indicate that the inclusion of distal goal‐related constructs significantly improve the prediction of behavioral volitions, over and above the prediction based on behavior‐related constructs. The MGB and an extended model outperform the TPB and show substantial predictive power. The implications of the findings for research on behaviors and goals are discussed. Copyright © 2000 John Wiley & Sons, Ltd.