How The Science Unfolded

In the mid-20th century, B.F. Skinner demonstrated that behaviour could be shaped through reinforcement: actions followed by rewards are repeated, while unrewarded actions fade. It was the beginning of behavioural science’s understanding of learning as a loop — stimulus, response, consequence.

Modern neuroscience has taken that behavioural model inside the brain. Using optogenetics — a method that makes selected neurons respond to light — researchers have identified the precise neural clusters that encode learned associations. These clusters, known as engram cells, act as the biological substrate of memory: when an experience is repeated, these same neurons fire together again, solidifying the connection.

In a landmark experiment, mice were trained to associate a specific chamber with a mild electric shock. During that learning, the neurons active in the hippocampus were genetically tagged. When those tagged neurons were later silenced, the mice no longer froze in the chamber — the learned fear response had disappeared. But when the scientists re-activated those same neurons with light, the behaviour returned instantly, even in a neutral environment. The memory hadn’t been erased; it had simply gone dormant until the original pattern was reawakened.

Later studies by Ryan et al. showed that even when an animal appeared to have forgotten an experience — as in cases of amnesia — the engram still persisted as a silent trace, waiting for the right stimulus to bring it back online.

In other words, habit lives in circuitry. Once encoded, behaviour is never completely lost; it lies beneath awareness, ready to be reactivated by the right combination of context, timing, and expectation.

What This Means For Customer Behaviour

What the engram experiments reveal is that behaviour doesn’t need constant reinforcement to persist; it needs consistent cues that can reactivate the neural trace of the original learning. Once a pattern is established, the brain economises. It stores the association so that familiar cues automatically retrieve the behaviour — the neurological equivalent of muscle memory.

In loyalty design, this insight is transformative. When customers interact with a programme — tapping a card, opening an app, scanning a receipt — they are engaging in small, repeatable loops. Over time, these actions become encoded as learned associations between the brand context (the cue) and the outcome (reward or recognition).

The cues don’t have to be grand or emotional; what matters is their stability and timing. The familiar app interface, the colour of a progress bar, the sound of a successful redemption — all these become part of the neural fingerprint that signals “this is rewarding.”

But there’s a limit. Pure repetition, without variation, gradually produces cue fatigue. The dopamine system, which governs motivation, fires most strongly not when a reward is delivered, but when there’s uncertainty about what will happen. Predictability teaches the brain; controlled surprisekeeps it interested.

That’s why the most effective loyalty programmes don’t just repeat rewards — they ritualise them. They create a stable behavioural framework that customers can follow almost automatically, while weaving in occasional moments of novelty that refresh the neural trace.

Think of it as choreography: the rhythm stays the same, but the steps vary just enough to stay alive.

Rituals That Sustain Behaviour

A ritual differs from a routine in one crucial way — it carries meaning.
A coffee-shop app that thanks you with the same animation every morning becomes a routine. An app that uses that same animation but occasionally overlays it with a short message (“You’ve hit a 10-day streak” or “Double points unlocked!”) becomes a ritual — a familiar act imbued with significance.

Every ritualised experience has three elements:

1. A reliable cue — something that tells the customer “this is my moment of engagement.”
2. A predictable structure — a process that feels the same each time, lowering cognitive effort.
3. A variable reinforcement — a small element of surprise that refreshes interest without breaking the pattern.

Together, these create what neuroscientists call a stable but plastic memory trace: a circuit that’s reliable enough to trigger automatically, yet flexible enough to remain rewarding.

Designing For Ritual And Surprise

1. Keep the framework constant.
   Anchor every interaction in a small number of recurring cues — visual, auditory, and procedural. Customers should never wonder how to engage.
2. Layer novelty within the framework.
   Change what customers discover, not how they get there. Hidden bonuses, occasional recognition, or personalised messages preserve anticipation without disrupting the engram.
3. Use timing deliberately.
   Surprise loses power when it’s constant. Calibrate intervals so that novelty feels earned — ideally when engagement is plateauing.
4. Echo the onboarding cues in later campaigns.
   The first version of a cue (a welcome animation, tone, or message style) has disproportionate recall value. Reusing it months later reactivates the original engram — a neurological form of “welcome back.”

The Deeper Insight

Loyalty isn’t sustained by size of reward, but by neural familiarity punctuated by emotional freshness. Stable cues anchor the behaviour; surprise recharges it.

This rhythm — predictability wrapped around variability — mirrors the way the brain balances efficiency with curiosity.

In neuroscience terms, that’s the interplay between the hippocampal systems that encode routine and the dopaminergic systems that signal novelty. In design terms, it’s how a customer can feel both safe and excited within the same experience.

The goal, then, isn’t endless innovation — it’s evolutionary repetition: keep the shape, vary the texture. Ritual makes surprise meaningful; surprise makes ritual memorable.

Managerial Takeaway

Think of your customer experience as a ritual sequence — a repeated set of cues and responses that feel comfortably familiar. Within that sequence, plant moments of controlled surprise: the bonus, the unexpected acknowledgment, the rare variant that reactivates attention. When surprise lives inside ritual, behaviour becomes self-sustaining. You no longer need to remind customers to return — their brains do it for you.

References:

Liu, X. et al. (2012). *Optogenetic stimulation of a hippocampal engram activates fear memory recall.* Nature, 484(7394), 381–385. 
Ryan, T. J. et al. (2015). *Engram cells retain memory under retrograde amnesia.* Science, 348(6238), 1007–1013.
Josselyn, S. A. & Tonegawa, S. (2020). *Memory engrams: Recalling the past and imagining the future.* Science, 367(6473), eaaw4325.
Roy, D. S. et al. (2022). *Brain-wide mapping reveals that engrams for a single memory are distributed.* Nature Communications, 13, 1799.