1. Theory of planned behavior
Steven Brantley
9 October 2014
H 571 – Principals of Health Behavior

2. Theory of Reasoned Action
Basis for the Theory of Planned Behavior
Attitude
Belief and evaluation of the behavior
Subjective norms
Opinions of others and motivation to comply

3. Theory of Planned Behavior

4. Perceived Behavioral Control
Objective realities interpreted by individuals
External factors
“Will and skill”
Varies greatly between people
Can be vastly different than reality
Perceived Behavioral Control can greatly outweigh the other two constructs

5. Control Beliefs Can I affect the outcome in question?
Facilitating and inhibiting factors
Beliefs ≠ Reality

6. Perceived Power Strength of each facilitating or inhibiting factor
Example
A man trying to quit smoking
Support from his wife and knowledge of the detriments of smoking fulfill the TRA
However the strength of his addiction and cost of smoking cessation are inhibiting factors with immense perceived power

7. Theory of Planned Behavior Example
An alcoholic is considering quitting drinking
Known negative health outcomes
Behavioral belief and personal evaluation of outcomes
Positive pressure to quit from spouse and some friends, negative pressure from co-workers and other friends
Normative beliefs, hold different weight
Resources to quit are readily available, and they are motivated despite the addiction
External and internal perceived control factors

8. So where does this theory fit in the TTI?

9. THE THEORY OF TRIADIC INFLUENCE
Distal
Influences
Proximal
Predictors
Levels of
Causation
Ultimate
Causes
Social/
Personal
Nexus
Expectancies
& Evaluations
Affect and
Cognitions
Decisions
Experiences
Intrapersonal Stream
Social/Normative Stream
Cultural/Attitudinal Stream
Biological/Nature
Nurture/Cultural
BIOLOGY/
PERSONALITY
SOCIAL
SITUATION
CULTURAL
ENVIRONMENT
Values/
Evaluations
Knowledge/
Expectancies
Perceived
Norms
Information/
Opportunities
Interpersonal
Bonding
Social
Competence
Interactions w/
Social Instit’s
Others’
Beh & Atts
Motivation
to Comply
Skills:
Social+General
Sense of
Self/Control
Self
Determination 1 2 3 7 8 9 10 11 12 13 14 15 16 17 18 l 4 5 6
SELF-EFFICACY
BEHAVIORAL
CONTROL
SOCIAL
NORMATIVE
BELIEFS
ATTITUDES
TOWARD THE
BEHAVIOR 19 20 21 22 23
DECISIONS/INTENTIONS
Trial Behavior
EXPERIENCES: Expectancies -- Social Reinforcements -- Psychological/Physiological
Related Behaviors J K

10. THE THEORY OF TRIADIC INFLUENCE
Distal
Influences
Proximal
Predictors
Levels of
Causation
Ultimate
Causes
Social/
Personal
Nexus
Expectancies
& Evaluations
Affect and
Cognitions
Decisions
Experiences
Intrapersonal Stream
Social/Normative Stream
Cultural/Attitudinal Stream
Biological/Nature
Nurture/Cultural
BIOLOGY/
PERSONALITY
SOCIAL
SITUATION
CULTURAL
ENVIRONMENT
Values/
Evaluations
Knowledge/
Expectancies
Perceived
Norms
Information/
Opportunities
Interpersonal
Bonding
Social
Competence
Interactions w/
Social Instit’s
Others’
Beh & Atts
Motivation
to Comply
Skills:
Social+General
Sense of
Self/Control
Self
Determination 1 2 3 7 8 9 10 11 12 13 14 15 16 17 18 l 4 5 6
SELF-EFFICACY
BEHAVIORAL
CONTROL
SOCIAL
NORMATIVE
BELIEFS
ATTITUDES
TOWARD THE
BEHAVIOR 19 20 21 22 23
DECISIONS/INTENTIONS
Trial Behavior
EXPERIENCES: Expectancies -- Social Reinforcements -- Psychological/Physiological
Related Behaviors J K

11. Prenatal Drug Use Example
Attitude Towards Behavior
Subjective Norms
Perceived Behavioral Control

12. Prenatal Drug Use Example
Attitude Towards Behavior
Known negative health outcomes
Don’t care because of strong addiction, altered neural pathways
Subjective Norms
Perceived Behavioral Control

13. Prenatal Drug Use Example
Attitude Towards Behavior
Known negative health outcomes
Don’t care because of strong addiction, altered neural pathways
Subjective Norms
Stigmatized, but common in the population
Families are often users too, no pressure to comply
Perceived Behavioral Control

14. Prenatal Drug Use Example
Attitude Towards Behavior
Known negative health outcomes
Don’t care because of strong addiction, altered neural pathways
Subjective Norms
Stigmatized, but common in the population
Families are often users too, no pressure to comply
Perceived Behavioral Control
Difficult to enroll in treatment
Effective live-in programs are very expensive
Addiction magnifies these inhibitors

15. Information, Motivation, Skill Model
Similar to the Theory of Planned Behavior
Information
What do I know (like belief/evaluation for attitude)
Motivation
Do I want to make a change (like attitude and subjective norms)
Skill
Am I capable of making change (like perceived behavioral control)

16. Comments or Questions?