Theory of planned behavior

1. Theory of Planned Behavior
William Patch

2. Where does planning fit into your life?
Your Education
Your Profession
Family Gatherings

3. •Planning also comes into play when
referring to one’s behavior, which takes us
to our theory…
THE THEORY OF PLANNED BEHAVIOR

4. Izek Ajzen
The Theory of Planned Behavior (TPB) was formulated by Icek Ajzen, a
Professor in Psychology at the University of Massachusetts.
The TPB was developed from the Theory of Reasoned Action (TRA) which
was also formed by Icek.

5. CORE IDEA BEHIND TPB &
TRA…….
INTENTION
ACTION
Leads to ….

6. The idea behind the TRA is that one’s intentions are formed
through the measuring of one’s attitude and subjective
norm towards performing a certain voluntary behavior.
Attitude: Certain attitudes are present before and while behaviors are performed.
Subjective Norm: How important people in the subject’s life would view the behavior.

7. Icek’s Findings: Not all behavior is voluntary
Leading us to a new factor
PBC Defined: refers to people's perceptions of their ability to perform a given behavior.
- It is directly related to behavioral intentions and the actual behavior.
Perceived Behavioral Control

8. Perceived Behavioral Control
A Combination of:
I.) Self Efficacy
-The difficulty of performing the action.
II.) Controllability
-The belief that one has control over the
behavior.

9. General Rule
Strong
Intentions
Strong
Attitude
Strong
Subjective
Norm
Strong
Perceived
Behavioral
Control
More likely to perform the Behavior

10. Uses
•The Theory of Planned Behavior, like many communication
theories, has been used to address many of the looming issue we
have in society.
–Premarital sex without condoms
–Obesity
–Alcohol abuse
–Cigarette abuse

11. Critics
•Like all theories, critics have voiced their opinion.
–People think that there are holes in the theory saying that there
are more factors to consider.