MKF2111 · Buyer Behaviour
The Consumer Decision Process III: Post-Decision Processes
This chapter covers what happens after the purchase. Satisfaction is set by the expectancy-disconfirmation model (performance vs expectations) and the satisfaction paradox; when outcomes disappoint, consumers use attribution theory (stability, focus, controllability) and show self-serving bias; equity theory governs fairness; and post-decision dissonance is reduced by sour-grapes and sweet-lemons. The oral favours an expectancy-disconfirmation or dissonance question where you define, apply and give the recovery tactic.
What this chapter covers
- 011. Appraisal theory: feelings depend on whether an offering is judged consistent (good) or inconsistent (bad) with goals
- 022. Affective forecasting: deciding on predicted feelings; we overestimate their intensity and duration (impact bias)
- 033. Expectancy-disconfirmation model: satisfaction = performance vs expectations; the satisfaction paradox
- 044. Attribution theory: cause sought along stability, focus and controllability; forgiving if temporary/external/uncontrollable
- 055. Self-serving bias: blame external causes for failures, claim internal credit for successes
- 066. Equity theory: comparing own outcome/input ratio to a partner's; unfairness → complaints
- 077. Cognitive & post-decision dissonance: anxiety the choice was wrong; worse for high-importance, similar alternatives
- 088. Reducing dissonance: sweet-lemons (upgrade the chosen), sour-grapes (downgrade the rejected), or revoke; marketer reassurance
Oral-exam answer: explain the satisfaction paradox with expectancy-disconfirmation
- GOOD: model statedDEFINE the model. Satisfaction is a comparison of perceived performance against expectations: performance above expectations → positive disconfirmation → satisfaction; below → negative disconfirmation → dissatisfaction.
- GOOD: applied to bothAPPLY to the diners. The performance is identical, but the reference points differ. Dana's low expectation is exceeded (positive disconfirmation → satisfied); Omar's ad-inflated expectation is missed (negative disconfirmation → dissatisfied). Same meal, opposite outcomes.
- OUTSTANDING: paradox + actionable takeawayState the IMPLICATION — the satisfaction paradox. Set expectations high enough to trigger trial but not so high they cause letdown; make realistic, achievable ad claims so you set the right reference point. Over-promising buys trial at the cost of satisfaction.
Key terms
- Expectancy-disconfirmation model
- Satisfaction is the comparison of perceived performance against prior expectations: performance at or above expectations gives positive disconfirmation and satisfaction; below gives negative disconfirmation and dissatisfaction.
- Satisfaction paradox
- Because satisfaction depends on expectations, raising expectations to attract customers also raises the bar performance must clear; the marketer must set expectations high enough to trigger trial but not so high they cause letdown.
- Attribution theory
- When an outcome disappoints, consumers seek a cause along three dimensions: stability (temporary vs permanent), focus (consumer vs marketer) and controllability (within or outside the firm's control). They are more forgiving when the cause is temporary, external and uncontrollable.
- Self-serving bias
- The tendency to attribute good outcomes to internal causes ('I chose well') and bad outcomes to external causes ('the app is broken'), protecting self-image.
- Equity theory
- Consumers judge fairness by comparing their own outcome-to-input ratio with an exchange partner's; a perceived imbalance feels unfair and triggers complaints or reduced loyalty.
- Post-decision dissonance (sour-grapes / sweet-lemons)
- Post-purchase anxiety that the choice may have been wrong — worse for high-importance choices among similarly attractive alternatives. Reduced by sweet-lemons (upgrade the chosen option), sour-grapes (downgrade the rejected option), or revoking the decision.
The Consumer Decision Process III: Post-Decision Processes FAQ
Why does the same product satisfy one customer and disappoint another?
Because satisfaction is relative to expectations, not absolute. The expectancy-disconfirmation model says identical performance produces satisfaction when it beats a low expectation and dissatisfaction when it misses a high one. This is why over-promising in ads backfires: it raises the reference point the experience then fails to clear.
When are customers most forgiving of a failure?
When their attribution is temporary, external and uncontrollable — 'it was a one-off because of the storm' rather than 'this brand is always broken'. Firms should therefore frame failures as rare and externally caused, and recover proactively, to prevent a permanent/controllable/marketer-focused attribution that drives churn.
How do marketers reduce post-purchase dissonance?
By making the choice feel right and reversible: post-purchase reassurance (follow-up emails, owner communities), guarantees and cooling-off periods. These support the consumer's own sweet-lemons (talk up the chosen option) and reduce the urge to revoke. Dissonance is worst for expensive choices among similar alternatives, so reassurance matters most there.
Why does post-purchase even matter to a marketer?
Because retention is far cheaper than acquisition, and negativity bias plus loss aversion mean one bad experience can outweigh several good ones. Managing satisfaction, attributions and dissonance protects repeat purchase and word of mouth — the post-decision stage is where loyalty is won or lost.
Exam move
Map this chapter as a post-purchase chain: satisfaction (expectancy-disconfirmation) → if disappointed, attribution + equity → dissonance + recovery. For each, rehearse a DEFINE → APPLY → IMPLICATION answer out loud, because this is the chapter most likely to be examined as a pure oral explain-and-apply. Lock the named devices precisely (positive/negative disconfirmation, the three attribution dimensions, sweet-lemons vs sour-grapes) since exact terminology is scored. Always end with the marketer's action — set realistic expectations, frame failures as temporary/external, reassure to cut dissonance. Link back to Prospect Theory (negativity bias, loss aversion) to show cross-topic integration for the top band.
