MKTG6007 · Consumer Behaviour
Post-Purchase Behaviour
The decision doesn't end at the checkout. Post-purchase evaluation decides repurchase, loyalty, reviews and word-of-mouth, and it applies to both high- and low-effort purchases. Two questions run the show: did I make the right choice? (dissonance and regret) and am I happy with it? (satisfaction). This chapter covers post-decision dissonance and the action-vs-inaction structure of regret (Gilovich), the two routes to satisfaction — the thought-based disconfirmation paradigm (expectations vs perceived performance) and feelings-based satisfaction — the loyalty metrics NPS vs CSAT, the complainer typology (passives, voicers, irates, activists) and why the firm wants to convert everyone into voicers, post-purchase learning by hypothesis testing (with the top-dog/underdog advertising postures it explains), and finally disposition, which closes the consumption loop.
What this chapter covers
- 014.1-4.2 Post-decision dissonance; regret of action vs inaction (Gilovich)
- 024.3 Satisfaction — the disconfirmation paradigm vs feelings-based satisfaction
- 034.4 NPS vs CSAT — long-term loyalty vs short-term satisfaction
- 044.5 The complainer typology — passives, voicers, irates, activists
- 054.6 Post-purchase learning by hypothesis testing
- 064.7-4.8 Top-dog vs underdog; disposition & meaningful objects
Worked example: explain a satisfaction failure with the disconfirmation paradigm
- +1State the paradigm. Satisfaction = perceived performance compared against expectations. The outcome is relative, not absolute: performance > expected = positive disconfirmation (delighted); = expected = confirmation (merely satisfied); < expected = negative disconfirmation (dissatisfied).
- +1Apply to the delighted diner. The first restaurant set modest expectations, so identical performance cleared the bar — positive disconfirmation, delight.
- +1Apply to the disappointed diner. The second hyped the meal, raising the bar it had to clear; the same performance fell below the inflated expectation — negative disconfirmation, disappointment.
- +1Prescribe the fix. Manage expectations: under-promise, over-deliver. For an experience-led venue, also manage the felt moment (feelings-based satisfaction), since not all satisfaction runs through expectations.
Key terms
- Post-decision dissonance
- The anxious doubt about whether the right choice was made — sharpest after high-effort, expensive, hard-to-reverse purchases. Consumers reduce it by extra searching and seeking confirming reviews; marketers reduce it with reassurance, guarantees, warranties and post-purchase contact.
- Regret (action vs inaction)
- Believing the wrong choice was made — buyer's remorse. Gilovich & Medvec: actions produce more short-term regret (“I shouldn't have bought it”), inactions more long-term regret (“I should have travelled”); the deepest life regret is failing to live up to the ideal self.
- Disconfirmation paradigm
- The thought-based route to satisfaction: compare perceived performance against expectations. Performance above expectations delights (positive disconfirmation), equal merely satisfies, below disappoints (negative disconfirmation). It is why over-promising backfires — hype raises the bar performance must clear.
- Net Promoter Score (NPS)
- A loyalty metric from one question (“how likely to recommend, 0–10?”): NPS = %Promoters (9–10) − %Detractors (0–6); passives (7–8) are excluded. It measures long-term advocacy and is benchmarkable across firms, where CSAT measures short-term satisfaction with a specific touchpoint.
- Complainer typology
- Four responses to dissatisfaction, least to most damaging: passives (won't complain or switch yet — silent risk), voicers (complain to the firm — the best, a chance to recover), irates (vent publicly), activists (escalate to regulators/legal — the worst). The firm's job is to convert silent and hostile types into voicers.
Post-Purchase Behaviour FAQ
What is the difference between dissonance and regret?
Post-decision dissonance is anxious doubt about whether the right choice was made — it spikes after expensive, hard-to-reverse purchases and is reduced by reassurance and confirming reviews. Regret is the stronger belief that the wrong choice was made (buyer's remorse). The course adds a time twist: regret of action fades short-term, while regret of inaction lingers long-term, and the biggest life regret is not becoming the ideal self.
Why does over-promising backfire?
Because satisfaction is relative to expectations, not absolute. Hyping a product raises the bar it must clear, so the same performance that delights against modest expectations disappoints against inflated ones. That is the disconfirmation paradigm, and it is why “under-promise, over-deliver” is sound: it engineers positive disconfirmation.
What is the difference between NPS and CSAT?
NPS measures long-term loyalty and advocacy across the whole relationship, from one recommend-likelihood question, and is benchmarkable across firms and industries. CSAT measures short-term satisfaction with a specific touchpoint or interaction. NPS can mislead if you don't weight by segment — heavy and light users score very differently, so one average can hide a churning core behind a contented fringe.
Why does a firm want customers to complain?
Because the customer who complains to your face is doing you a favour. Of the four complainer types, voicers are the best — they complain directly, giving you a chance to fix the problem and recover the relationship (a well-handled complaint can leave a customer more loyal: the service-recovery paradox). The dangerous types are passives, who quietly leave so you never learn what's wrong, and irates/activists, who tell everyone but you. So making it easy to voice is a retention strategy, not a cost.
Exam move
When you diagnose a brand's satisfaction problem, first ask which route is broken: a spec-driven product (a laptop) lives or dies on the disconfirmation paradigm, so manage expectations; an experience (a restaurant, a holiday) lives on feelings, so manage the moment. Treat dissonance and regret as repurchase risks to design against (reassurance, guarantees, follow-up), and read NPS critically — weight by segment. Map any dissatisfied customer to the complainer typology and prescribe the conversion to voicer (visible channels, fast response). Use the hypothesis-testing loop to explain advertising posture: top-dog brands remind to keep beliefs unchanged, underdogs provoke re-evaluation — and remember disposition closes the acquisition → usage → disposition loop.
