| Variables |
EKB Model 1982 |
EBM Model 1986 |
EBM Model 1995 |
EBM Model 2001 |
| Components |
(i) Input(ii) Information processing(iii) Consumer decision process (iv) External influences |
(i) Input(ii) Information processing(iii) Consumer decision process and(iv) Variables influencing the decision process |
(i) Input(ii) Information processing(iii) Consumer decision process; and(iv) Variables influencing the decision process |
(i) Information input (ii) Information processing (iii) Decision process stage(iv) Decision process variables, (v) External influences |
| Variables Influencing decision process |
Influences shown independently in two different components of model (decision process variables and external influences) |
Three component-variables influencing decision process:individual characteristics; social influences; and situational influences |
(i) Environmental influences: Situation, culture(ii) Individual differences: Consumer resources and combining of personality values and lifestyle |
(i) Environmental Influences: Culture, social class, family, personal influences, and situation.(ii) Individual Differences: Consumer knowledge, personality, values and lifestyle |
| Internal Search |
Included in memory |
Shown individually |
Treated as distinctly |
Presented separately |
| Decision Process Component |
Indicated as choice |
Indicated as purchase |
Indicated as purchase |
Specified as purchase |
| Outcome of Purchase |
(i) Dissonance. feedback to external search only, no feedback to beliefs, (ii) satisfactionfeedback to beliefs |
Effects shown as (i) Satisfaction and (ii) Dissatisfaction.Both feedings back to consumer beliefs |
(i) Dissatisfaction feeding back to external search (ii) Divestment (iii) Satisfaction providing feedback to pre-purchase evaluation |
(i) Dissatisfaction feeding back to external search (ii) Divestment (iii) Satisfaction providing feedback to pre-purchase evaluation |
| Motives |
Shown separately |
Individual characteristics. Apart of variables influencing decision process components |
Individual characteristics. Apart of variables influencing decision process components |
Combined with involvement under consumer individual differences |
| Lifestyle & Personality |
Shown separately |
Included with individual characteristics. |
Combined with personality and values, all included under individual differences. |
Combined with personality and values, all included under consumer individual differences. |
| Evaluation Criteria |
Shown separately |
Included in beliefs |
being considered before purchase as pre-purchase evaluation criteria as well as after consumption as post-purchase alternative evaluation |
being considered before purchase as pre-purchase evaluation criteria as well as after consumption as post-purchase alternative evaluation |
| Normative Compliance and Info. Process |
Shown separately |
Included with social influences |
Not explicitly indicated |
Combined with memory |
| Cultural Norm and Values |
Shown separately (direct influence on lifestyle) |
Included with social influences |
Included as part of environmental influences |
Involved under environmental influences |
| Reference group/family |
Shown separately. variables influencing decision process components. |
Included with social influences direct influences on all elements of decision process |
Decision and reference groups included as part of environmental influences |
Encompassed under environmental influences |
| Unanticipated circumstances |
Shown separatelyBut direct influence on choice |
Shown separately as situational influences and direct influence on decision process |
Included as part of environmental influences |
Comprised under environmental influences |
