Latest / Sales Leadership with Fexingo: Quota Carriers, Sales Managers, and Revenue Teams / How Sales Reps Can Use the Zeigarnik Effect to Keep Prospects Engaged
Transcript
- Lucas: There's a psychological principle called the Zeigarnik Effect, named after a Soviet psychologist in the 1920s. Bluma Zeigarnik noticed that waiters remembered orders for tables that hadn't paid yet, but forgot orders once the bill was settled. Luna: So our brains hang onto unfinished business. That feels almost obvious once you hear it, but I bet sales teams don't leverage it intentionally. Lucas: Exactly. And I came across a case recently that made this concrete. A B2B SaaS company selling project management software ran an experiment. They had two demo approaches: a full walkthrough covering every feature, and a partial demo that deliberately skipped one key integration feature — and then ended the call with a teaser about it. Luna: Left them hanging. That's bold. What happened? Lucas: The partial-demo group closed at a rate 18 percent higher. Prospects were more likely to schedule follow-up calls, and they specifically asked about the missing feature. The incomplete demo created a mental itch they wanted to scratch. Luna: So the unfinished task — the missing integration demo — kept the prospect thinking about the product after the call ended. Instead of a clean 'thanks, we'll think about it,' they had a specific reason to re-engage. Lucas: Right. And it's not just about demos. You can apply this to proposals, follow-up emails, even negotiations. The key is to intentionally leave something open — a question unanswered, a feature undemonstrated, a piece of data you'll share later — so the prospect's brain stays looped in. Luna: I'm thinking about that feeling when you binge a show and end on a cliffhanger — you can't stop thinking about it. Same principle. But how do you do this without feeling manipulative? Lucas: That's the critical question. The line is between genuine curiosity and manufactured scarcity. If the thing you're withholding is actually valuable and the prospect genuinely benefits from learning it later, it's a teaching technique. If you're just jerking them around, they'll feel it. Luna: So the intent has to be about deepening understanding, not creating anxiety. Lucas: Exactly. Zeigarnik's own research showed that the effect is strongest when people are intrinsically motivated. So if the prospect is already interested, an incomplete demo amplifies their engagement. If they're not interested, it won't create interest out of thin air. Luna: That's a good reality check. It's not a magic bullet — it works on people who are already in the consideration phase. Lucas: Right. So the best use cases are mid-funnel. A rep has done discovery, the prospect knows the problem, they're evaluating solutions. That's when you introduce the 'incomplete' element. Luna: Give me another concrete example beyond the demo teaser. Lucas: Sure. A rep selling marketing automation software might send a proposal that outlines three core benefits, but leaves the fourth — say, advanced analytics — as a footnote saying 'details available upon request.' The prospect's brain registers that as unfinished business. Luna: And the rep follows up specifically on that footnote. That's smart because it gives the prospect a reason to respond that's not just 'did you read my email?' Lucas: Exactly. The follow-up becomes value-driven: 'I wanted to share those analytics details we touched on in the proposal.' That's a much warmer re-engagement than a generic check-in. Luna: I imagine this works well in multi-threaded deals too. If you have a champion and an economic buyer, you could leave a different open thread for each stakeholder. Lucas: Great point. The champion might get the incomplete demo, the economic buyer might get an incomplete ROI model. They each have their own Zeigarnik hook. Luna: If today's episode gave you a new way to think about prospect engagement, that's exactly the kind of value we aim for. And the way these stay ad-free is simple listener support — buy me a coffee dot com slash fexingo. Lucas: Yeah, it's a small way to keep the conversation going without any sponsor interruptions. And we genuinely appreciate every person who chips in. Luna: Alright, back to the Zeigarnik Effect. One thing I want to explore: are there downsides? Can you overdo it? Lucas: Absolutely. If every interaction ends with a cliffhanger, the prospect starts to feel like they're being played. It becomes a pattern, and patterns lose their novelty. The effect relies on the incompletion being surprising or novel. Luna: So you pick one or two key moments in the sales cycle to leave something open, not everything. Lucas: Exactly. And you have to close the loop eventually. If you never deliver on the incomplete item, the prospect's brain registers frustration, not engagement. Zeigarnik's principle works because the task is eventually completed. Luna: So the rep has to promise that the answer will come — and then deliver. It's not about dangling forever. Lucas: Right. The classic example from Zeigarnik's study: when participants were interrupted during a task, they remembered it better than completed tasks — but only if they intended to finish it. If they were told the task was over, the memory advantage disappeared. Luna: So the prospect has to believe that the incomplete piece will be resolved. That's a trust element. Lucas: Exactly. And that's why this works best when the rep is already credible. The Zeigarnik Effect amplifies existing trust; it doesn't create it. Luna: Let's talk about follow-up cadence. If you leave something open, how long do you wait before closing the loop? Lucas: The research suggests that the memory benefit decays after about 24 to 48 hours. So you want to re-engage within that window. Too fast — same day — feels like you're rushing. Too slow — a week later — and the prospect may have moved on mentally. Luna: So what's a practical schedule? Say you do a partial demo on a Tuesday. When do you follow up? Lucas: Thursday or Friday. Send a short email or a LinkedIn message referencing the missing piece: 'I realized we didn't cover the advanced reporting module. Here's a two-minute video overview.' The prospect's brain goes 'ah, that thing I was wondering about' and re-engages. Luna: That feels natural. It's not pushy, it's completing the picture. Lucas: And you can use it even after the deal is won. For customer success, leaving a training module incomplete on purpose can drive adoption. The customer's brain wants to finish it, so they log in again. Luna: That's clever — it's not just for closing, it's for retention and expansion too. Lucas: Exactly. The Zeigarnik Effect is a universal cognitive bias. The trick is using it intentionally rather than leaving things incomplete by accident — which is what most reps do anyway. Luna: Accidental incompletion. That's probably happening all the time. A rep sends a proposal with a missing page, or forgets to answer a question in a demo. Those are negative Zeigarnik moments. Lucas: Right. Those create frustration, not engagement. The difference is the prospect's expectation. If they think the incompletion is a mistake, they feel annoyed. If they think it's intentional and that you'll deliver, they feel curious. Luna: So the framing matters. How do you signal that an incompletion is intentional without being cheesy? Lucas: Simple. You say it directly: 'I'm going to show you three features today. We'll save the fourth for our next conversation because it's best understood with your team's specific data.' That sets the expectation that there's more to come. Luna: I like that. It's honest, it creates a reason for a next step, and it gives the prospect something to look forward to. Lucas: And it respects their time. You're not trying to cram everything into one call. You're pacing the information to maximize retention. Luna: So Zeigarnik is ultimately about respecting how the brain works. Use it to design a sales process that aligns with memory and motivation, not against them. Lucas: That's the takeaway. One small change — leaving one thing incomplete per call or per proposal — can measurably improve re-engagement rates. And it costs nothing to implement.