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== '''Theory of planned behavior''' ==

=='''Theory of planned behavior'''==

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== Acronym ==

==Acronym==

TPB

TPB

== Alternate name(s)==

==Alternate name(s)==

N/A

N/A

== Main dependent construct(s)/factor(s)==

==Main dependent construct(s)/factor(s)==

Behavioral intention, Behavior

Behavioral intention, Behavior

== Main independent construct(s)/factor(s) ==

==Main independent construct(s)/factor(s)==

Attitude toward behavior, Subjective norm, Perceived behavioral control

Attitude toward behavior, Subjective norm, Perceived behavioral control

== Concise description of theory ==

==Concise description of theory==

TPB posits that individual behavior is driven by behavioral intentions where behavioural intentions are a function of an individual's attitude toward the behaviour, the subjective norms surrounding the performance of the behavior, and the individual's perception of the ease with which the behavior can be performed (behavioral control). Attitude toward the behavior is defined as the individual's positive or negative feelings about performing a behaviour. It is determined through an assessment of one's beliefs regarding the consequences arising from a behavior and an evaluation of the desirability of these consequences. Formally, overall attitude can be assessed as the sum of the individual consequence x desirability assessments for all expected consequences of the behavior. Subjective norm is defined as an individual's perception of whether people important to the individual think the behavior should be performed. The contribution of the opinion of any given referent is weighted by the motivation that an individual has to comply with the wishes of that referent. Hence, overall subjective norm can be expressed as the sum of the individual perception x motivation assessments for all relevant referents. Behavioral control is defined as one's perception of the difficulty of performing a behavior. TPB views the control that people have over their behavior as lying on a continuum from behaviors that are easily performed to those requiring considerable effort, resources, etc. Although Ajzen has suggested that the link between behavior and behavioral control outlined in the model should be between behavior and actual behavioural control rather than perceived behavioural control, the difficulty of assessing actual control has led to the use of perceived control as a proxy.  

TPB posits that individual behavior is driven by behavioral intentions where behavioural intentions are a function of an individual's attitude toward the behaviour, the subjective norms surrounding the performance of the behavior, and the individual's perception of the ease with which the behavior can be performed (behavioral control). Attitude toward the behavior is defined as the individual's positive or negative feelings about performing a behaviour. It is determined through an assessment of one's beliefs regarding the consequences arising from a behavior and an evaluation of the desirability of these consequences. Formally, overall attitude can be assessed as the sum of the individual consequence x desirability assessments for all expected consequences of the behavior. Subjective norm is defined as an individual's perception of whether people important to the individual think the behavior should be performed. The contribution of the opinion of any given referent is weighted by the motivation that an individual has to comply with the wishes of that referent. Hence, overall subjective norm can be expressed as the sum of the individual perception x motivation assessments for all relevant referents. Behavioral control is defined as one's perception of the difficulty of performing a behavior. TPB views the control that people have over their behavior as lying on a continuum from behaviors that are easily performed to those requiring considerable effort, resources, etc. Although Ajzen has suggested that the link between behavior and behavioral control outlined in the model should be between behavior and actual behavioural control rather than perceived behavioural control, the difficulty of assessing actual control has led to the use of perceived control as a proxy.

 

Source: Eagly, A. H., & Chaiken, S. (1993). The psychology of attitudes. Fort Worth: Harcourt Brace Jovanovich College Publishers.

Source: Eagly, A. H., & Chaiken, S. (1993). The psychology of attitudes. Fort Worth: Harcourt Brace Jovanovich College Publishers.

== Diagram/schematic of theory ==

==Diagram/schematic of theory==

[[Image:Tpb.JPG]]

[[Image:Tpb.JPG]]

== Originating author(s) ==

==Originating author(s)==

Ajzen (1985); Ajzen (1991)

Ajzen (1985); Ajzen (1991)

== Seminal articles ==

==Seminal articles==

Ajzen, I. (1985). From intentions to actions: A theory of planned behavior. In J. Kuhl, & J. Beckmann (Eds.), Springer series in social psychology (pp. 11-39). Berlin: Springer.  

Ajzen, I. (1985). From intentions to actions: A theory of planned behavior. In J. Kuhl, & J. Beckmann (Eds.), Springer series in social psychology (pp. 11-39). Berlin: Springer.  

Ajzen, I. (1991). [http://inn.colorado.edu/Details/Paper/211 The theory of planned behavior]. Organizational Behavior and Human Decision Processes, 50(2), 179-211.

Ajzen, I. (1991). [http://inn.colorado.edu/Details/Paper/211 The theory of planned behavior]. Organizational Behavior and Human Decision Processes, 50(2), 179-211.

== Originating area ==

==Originating area==

Social psychology

Social psychology

== Level of analysis ==

==Level of analysis==

Individual

Individual

== IS articles that use the theory ==

==IS articles that use the theory==

Bobbitt, L. M., & Dabholkar, P. A. (2001). Integrating attitudinal theories to understand and predict use of technology-based self-service: The internet as an illustration. International Journal of Service Industry Management, 12(5), 423-450.  

Bobbitt, L. M., & Dabholkar, P. A. (2001). Integrating attitudinal theories to understand and predict use of technology-based self-service: The internet as an illustration. International Journal of Service Industry Management, 12(5), 423-450.  

Workman, M. (2005). Expert decision support system use, disuse, and misuse: A study using the theory of planned behavior. Journal of Computers in Human Behavior, 21, 211-231.

Workman, M. (2005). Expert decision support system use, disuse, and misuse: A study using the theory of planned behavior. Journal of Computers in Human Behavior, 21, 211-231.

== Links from this theory to other theories ==

==Links from this theory to other theories==

[[Hedonic-motivation system adoption model (HMSAM)]][[Technology acceptance model]], [[Theory of reasoned action]], [[Unified theory of acceptance and use of technology]]

[[Hedonic-motivation system adoption model (HMSAM)]], [[Technology acceptance model]], [[Theory of reasoned action]], [[Unified theory of acceptance and use of technology]]

== External links ==

==External links==

http://en.wikipedia.org/wiki/Theory_of_planned_behaviour, Wikipedia presents an overview of the theory of planned behavior including references.  

http://en.wikipedia.org/wiki/Theory_of_planned_behaviour, Wikipedia presents an overview of the theory of planned behavior including references.  

http://www.people.umass.edu/aizen/tpb.html, Useful summary of TPB, including bibliography and survey items, from Icek Ajzen

http://www.people.umass.edu/aizen/tpb.html, Useful summary of TPB, including bibliography and survey items, from Icek Ajzen

== Original Contributor(s) ==

==Original Contributor(s)==

Brent Furneaux

Brent Furneaux

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