Latest / Marketing Psychology with Fexingo: Behavioral Triggers, Persuasion, and Consumer Behavior / How the Zeigarnik Effect Keeps You Clicking
Transcript
- Lucas: Luna, I want to start with a waiter in a busy Viennese café in 1927. Luna: OK, I'm intrigued. What did this waiter do? Lucas: A psychologist named Bluma Zeigarnik noticed that waiters could remember complex orders — soup, schnitzel, strudel — but only until the customer paid and left. Once the bill was settled, they'd forget the entire order almost instantly. Luna: So the unfinished order stuck in memory, but the completed one got dumped. Lucas: Exactly. Zeigarnik ran experiments and found that interrupted tasks are recalled about twice as often as completed ones. That became the Zeigarnik Effect — our brain hates open loops and keeps them active in working memory until they're closed. Luna: That explains why I can't stop thinking about the series finale cliffhanger I saw last night. Lucas: Right. And that's exactly what marketers have weaponised. Think about Netflix's auto-play feature. You finish an episode and within ten seconds the next one starts. They don't want you to close the loop — they want the loop to stay open so you keep bingeing. Luna: It's the opposite of the waiter. The waiter wanted the loop closed. Netflix wants it open forever. Lucas: And it works. Netflix's own data showed that members who watched a series to completion often did so in a single session, and auto-play was the single biggest driver of that behaviour. The Zeigarnik Effect keeps the 'unfinished' flag flying in your brain. Luna: But it's not just streaming. I see this in Duolingo too. That streak counter — 'you have a 47-day streak' — it's an open loop. If I miss a day, the streak resets. The loop closes in the worst way. Lucas: Exactly. Duolingo sends you a push notification that says 'Your streak is at risk.' That's pure Zeigarnik. They don't remind you to learn Spanish — they remind you that a loop is about to close unfinished. That's a stronger motivator. Luna: Let's dig into the numbers. You mentioned a campaign you found. Lucas: Yeah. A direct to consumer mattress brand — I won't name them, but it's a common play in that space — ran a test where they placed a 'mystery discount' spinner on their checkout page. Customers spun the wheel and got a discount between 5 and 25 percent. Luna: But the wheel doesn't stop spinning until they click 'stop,' right? Lucas: Right. The discount is revealed only after the customer initiates the stop. That moment of anticipation — the wheel spinning, the result unknown — is an open loop. They tested it against a straight 15 percent off coupon. The mystery spinner increased conversion by 34 percent. Luna: So the uncertainty of the outcome — the unfinished reveal — kept people engaged long enough to convert. Lucas: Precisely. And the discount was often lower than 15 percent, so the brand actually gave away less in discounts while getting more sales. The Zeigarnik Effect made the smaller discount feel more exciting. Luna: There's a fine line though. Too many open loops and users get frustrated. I think about email newsletters that tease 'the secret to X' in the subject line, then the body doesn't deliver. That's not Zeigarnik — that's just annoying. Lucas: You're right. The effect works best when the loop is meaningful and closure is satisfying. If you dangle a carrot that never comes, the brain learns to ignore the loop entirely. That's called learned irrelevance. Luna: So the marketer's job is to open a loop that feels worth closing, then provide a satisfying close. But not too fast. Lucas: Yes. One of the cleanest examples is progress bars. LinkedIn's profile completeness bar — 'Your profile is 85 percent complete' — that 15 percent gap is an open loop. Users spend time filling in skills and endorsements just to see the bar hit 100 percent. Luna: I've seen studies that a progress bar increases completion rates by over 50 percent. It's the same mechanism as Duolingo's streak — you're chasing closure. Lucas: And it works even when the bar is fake. There was a famous experiment where a car wash gave loyalty cards. One group got a card with eight stamps and needed two more for a free wash. Another group got a card with ten stamps but two were already pre-stamped. The second group completed the card much faster, because they felt closer to closure. Luna: That's the near-completion effect. The loop is almost closed, so the brain prioritises it. Lucas: If these marketing psychology concepts have sparked something you've actually used in your work or even just noticed in your own habits, that's exactly why we make this show. And honestly, a small group of listeners already helps keep it ad-free through buy me a coffee dot com slash fexingo. It's not a big thing — just a way to cover the hosting and research time so we can keep digging into experiments like Zeigarnik's. Luna: Yeah, and it means we never have to interrupt the content with a sponsor read. If that matters to you, you know where to find it. Otherwise, let's get back to open loops. Lucas: So one practical takeaway: if you're designing a user journey, identify the natural closure points and delay them slightly. For example, a SaaS onboarding flow that shows a checklist with 7 of 10 tasks done. The user will likely finish the last three just to see the checkmark. Luna: But don't make the tasks too hard. If the loop feels impossible to close, users abandon it. Lucas: Right. The loop has to feel achievable. That's why gamification works best when progress is visible and the next step is clear. The Zeigarnik Effect isn't about anxiety — it's about anticipation. Luna: Let's talk about a brand that uses this really well. I'm thinking of Headspace. Their introductory meditation course has a sequence of sessions. After session one, session two is locked, but you can see it's there. The unfinished path pulls you forward. Lucas: And they send notifications like 'You're on a 3-day streak. Keep going to unlock a new pack.' That's a double loop — the streak loop and the unlock loop. They stack Zeigarnik effects. Luna: Stacking loops can backfire though. If there are too many open loops, users feel overwhelmed. I've abandoned apps because I had too many notifications about unfinished tasks. Lucas: That's a good point. The optimal number seems to be one to three active loops. Any more and the brain treats them as noise. So prioritise the most important loop — usually the one closest to closure. Luna: So for a marketer or product designer, what's the one thing to try tomorrow? Lucas: Identify one key action your users don't complete. Then create a visual progress indicator that shows 80 percent completion. Then nudge them with a notification that says 'Almost there.' That's Zeigarnik in a nutshell. Luna: I'll try that on our podcast website. We have a 'finish your profile' prompt. Maybe I'll add a progress bar. Lucas: I bet you'll see a bump. Just don't make it a fake bar that never reaches 100 percent — that's the fastest way to break trust. Luna: Fair. So the lesson: open loops command attention, near-closure compels action, and satisfying closure builds trust. Lucas: And Bluma Zeigarnik figured that out by watching a waiter in 1927. Not bad for a hundred-year-old insight. Luna: Makes you wonder what everyday observations are hiding the next big behavioral principle.