# The Locksmith Who Taught Everyone 
to Pick Locks.

In the summer of 1974, a locksmith named Harry Miller opened a shop in a mid-sized American city and built a business that grew steadily for the next eleven years.

He was good at his work. He trained apprentices. Three of his former apprentices opened their own shops. He taught evening classes at a local vocational college — practical lock-fitting, key-cutting, the mechanical principles behind different locking systems. He was generous with his knowledge and proud of the craft he had spent twenty years developing.

In 1985, his insurance broker declined to renew his business insurance policy.

The reason, stated plainly in the letter: the broker had identified that a significant proportion of the city's lock-picking and burglary incidents over the preceding three years involved techniques and tool combinations that matched the curriculum of the vocational college course. The people who had been breaking into buildings were not strangers to the trade. Several had been through exactly the training Miller had designed to produce skilled professionals.

Miller had not taught criminals. He had taught people. Once the skill existed in the world, he had no further control over how it was deployed.

He had changed the relationship between every lock in the city and every person who passed one.

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/755eeae3-595a-47f7-ab9a-58d6fd05f5f5.jpg align="center")

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### The Research That Explains Why Every Discount Does the Same Thing

Adaptation-level theory was first proposed by an American psychologist named Harry Helson in the American Journal of Psychology in 1947, and developed fully in his 1964 book of the same name.

Helson's core finding was that human perception is never absolute. Every stimulus is evaluated not against an objective standard but against an adaptation level — a reference point established by the past and present context of experience. The stimuli that establish the adaptation level are weighted by their recency, salience, and frequency: the most recent experiences, the most vivid experiences, and the most frequently repeated experiences carry the most weight in establishing the reference point against which everything else is judged.

Helson developed the theory through experiments in colour perception — demonstrating that the same grey square looks different against a white background than against a black one, because the background establishes the adaptation level against which the grey is evaluated. But the principle extended immediately beyond visual perception to judgment and evaluation of any kind — including price.

The application to brand pricing is precise and direct.

When a customer pays full price for a brand's product, that full price becomes part of their adaptation level for this brand. It is the reference point. Subsequent prices are evaluated against it. A price reduction reads as a gain — below the adaptation level, welcomed. A price increase reads as a loss — above the adaptation level, aversive.

When a brand offers a discount, the discounted price establishes itself in the customer's adaptation level alongside the full price — and through Helson's weighting of recency, salience, and frequency, it may over time replace it. The customer who has received three discounts over the past year has an adaptation level that now includes those discounts as part of their price experience with this brand.

The full price, evaluated against that adaptation level, is no longer neutral. It is above the reference point. It reads as a surcharge.

Adaptation levels do not reset when the stimulus that established them is removed. They change slowly, in proportion to new experiences, over time. A brand cannot send a discount and then decide the lesson was not taught. The lesson was taught the moment the discount was received. It is now part of the customer's reference point — governing every price they will encounter from this brand from that point forward.

The locksmith taught the skill. The brand taught the price.

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/c93e79b4-63f1-4a4f-b037-b181a6207d4b.jpg align="center")

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### What the Discount Teaches Without Knowing It Is Teaching

A discount is a communication — independent of and prior to the offer it contains.

It communicates that the full price was negotiable. Whatever the brand's stated price, the customer now knows — not suspects, knows — that a different price is available. The full price was a ceiling, not a floor. The relationship between the listed price and the real price has been permanently revealed. This becomes part of the adaptation level.

It communicates that waiting is a valid and rewarded strategy. The customer who waited and received a discount has been reinforced for waiting. They will wait again. They will wait more strategically. They will apply this knowledge to future interactions and communicate it to everyone they know who buys from this brand. This too becomes part of the adaptation level — not just the price expectation, but the behaviour strategy calibrated to it.

It communicates that the full-price customer is the one who did not know better. The customer who discovers, after paying full price, that a discount was available to anyone who waited — experiences the full-price purchase not as loyalty rewarded but as naivety exposed. The full-price experience is no longer an experience of being valued. It is an experience of being the person who paid more for the same thing because they had not yet learned the lesson others had.

Each of these lessons joins the customer's adaptation level and governs every subsequent interaction with this brand's pricing architecture.

The locksmith did not pick the locks. He taught the skill. Once the skill existed in the world, he had no further control over how it was deployed.

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/3ea20664-0df8-429b-88f5-f2f93d31bdda.jpg align="center")

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### The Four Ways Adaptation Level Erosion Shows Up in the Revenue Numbers

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**"Our Full-Price Conversion Rate Has Been Declining for Two Years"**

The first symptom of adaptation level erosion — and the one most commonly misdiagnosed.

Full-price conversion rates decline for many reasons. Product-market fit. Competitive pressure. Category saturation. All of these are investigated. The investigation almost never conducted is the one that examines the discount history of the customers who are no longer converting at full price.

The customer who converted at full price eighteen months ago and is not converting now is not, in most cases, a customer who has lost interest in the product. They are a customer whose adaptation level has been updated by their subsequent discount experience. The full price they paid eighteen months ago is no longer their reference point. The discounted prices they have received since then are. The full price now reads as above the adapted reference point — and above the adaptation level reads, in Helson's framework, as an aversive stimulus.

*Harry Miller did not know, in 1975, which of his students would use the lock-picking skills for purposes he had not intended. By 1985, the pattern was visible in the aggregate.*

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/17514b2b-3c14-407b-baee-b33ed51dab60.jpg align="center")

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**"Discount Campaigns Are Producing Shorter and Shorter Lift"**

The second symptom — the one that reveals the adaptation level mechanism most directly.

The first discount campaign produced a significant lift in conversion. The second produced a slightly smaller lift. The third smaller still. The team attributes this to creative fatigue, audience saturation, or the law of diminishing returns in advertising.

What is actually happening is the adaptation level adjusting to incorporate the discount as an expected feature of the brand's pricing architecture. The first discount was a gain relative to the adaptation level — exciting, motivating, a reason to act now. By the third or fourth campaign, the discounted price has become part of the adaptation level itself. It is no longer a gain. It is the neutral point. The full price is now above neutral — an aversive stimulus to be avoided rather than a price to be paid.

The discount that produced lift the first time was a departure from the adaptation level. The discount that produces no lift now is the adaptation level.

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/2b3ef7c0-f684-4415-8116-191dd18fa19f.jpg align="center")

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**"We Stopped Discounting and Sales Dropped Immediately"**

The third symptom — the most direct evidence that adaptation level erosion has become structural.

A brand running discount campaigns for eighteen months returns to full-price selling. The campaigns stop. The sales dashboard shows an immediate and significant drop.

The team interprets this as evidence that the promotions were working and should be reinstated.

What they are observing is the adaptation level in operation. The customer base has an adaptation level that includes the discounted price as a reference point. The full price, evaluated against that adaptation level, reads as above the reference — an unexpected increase in an input cost the customer had learned not to pay.

The drop in sales when discounting stops is not evidence that discounting works. It is evidence of how thoroughly discounting has moved the adaptation level — and how far the full price now sits above the reference point the brand taught the customer to hold.

*The insurance broker had not seen Miller commit a crime. He had seen the pattern that the teaching created. The individual act was innocent. The aggregate effect was not.*  

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/e16c2c43-ef99-441a-8990-fad4fa225929.jpg align="center")

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**"Our Customers Wait for Sales — And Tell Us They Do"**

The fourth symptom is the most structurally important — because it reveals that the adaptation level mechanism has become explicit in the customer's conscious strategy rather than operating below awareness.

A customer who says "I wait for your sales" is not describing a preference. They are describing a lesson the brand taught them. They are reporting their own adaptation level. The reference price for this brand, in their experience, is the sale price — and they have calibrated their purchase behaviour accordingly.

This customer cannot be re-educated into paying full price through better creative, sharper messaging, or more sophisticated segmentation. Their adaptation level was established through experience, not communication. It can only be changed through experience — specifically, through a sustained period in which the discounted price is no longer part of the brand's pricing behaviour, long enough for the adaptation level to recalibrate to the full price.

That period, if it is long enough to work, will be painful in ways most brands are not willing to sustain.  

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/a117213a-5576-4ee6-b987-8eaef7d51c34.jpg align="center")

  

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### Three Approaches That Slow Adaptation Level Erosion

The adaptation level cannot be reset instantly. It is established by the history of experience, and it changes slowly in proportion to the new experiences that update it. A brand that has been running discount campaigns for two years has two years of adaptation level to work against.

Three approaches that slow further erosion without eliminating the promotional activity that drives short-term revenue.

**Approach 1 — Segment by adaptation level, not by behaviour**

Not all customers in a brand's database have the same adaptation level. A customer who has purchased at full price twice in the last twelve months has a different adaptation level from a customer who has purchased only during discount campaigns for the same period.

These two customers should not receive the same promotional communication. The full-price customer's adaptation level is the full price — a discount sent to them moves their reference point unnecessarily. The discount-conditioned customer's adaptation level already includes the discount — a discount maintains their reference point rather than deteriorating the full-price customer's.

Segment promotional sends by purchase history in relation to promotional periods. Send discounts to discount-conditioned segments. Protect the full-price customer's adaptation level by not sending them discounts they have not yet been taught to expect.

**Approach 2 — Use value addition rather than price reduction**

A discount moves the adaptation level for price. A value addition — an additional service, an exclusive feature, access to something not otherwise available — moves the adaptation level for the relationship rather than the price.

The customer who receives a free service upgrade instead of a 20% discount has experienced a gain relative to their current adaptation level without learning that the price was negotiable. Their reference price for the product is unchanged. Their perception of the value of the relationship has increased.

Value additions are structurally superior to price reductions for exactly the reason Helson's framework predicts: they add to the value the customer perceives without reducing the reference price the brand needs to protect.

**Approach 3 — Make the discount unpredictable rather than rhythmic**

The adaptation level is established by recency, salience, and frequency. A discount that occurs four times a year, predictably, at the same intervals — end of quarter, festive season, anniversary — establishes itself in the adaptation level through frequency. The customer who has experienced four annual cycles of this pattern has incorporated the sale cadence into their adaptation level as reliably as the price itself. They know when to wait.

An unpredictable discount schedule — lower frequency, variable timing, genuinely surprising — does not establish itself in the adaptation level as a reliable reference point. The customer who cannot predict when the sale will happen cannot build a waiting strategy around it. The full price remains closer to their adaptation level because the discounted price has not been confirmed as a pattern they can rely on.  

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/ec5712be-279b-45c2-b79c-5f69b4ef9992.jpg align="center")

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### The Lock That Held

Harry Miller closed his locksmith shop in 1987.

He reopened in 1989 under a different model.

He still taught. But he taught exclusively to security professionals, locksmiths, and building managers — people with a demonstrated professional need for the knowledge and a professional stake in using it responsibly. The evening classes at the vocational college were discontinued. The general curriculum was replaced by a credentialled programme with verified professional membership as the entry requirement.

The knowledge was the same. The distribution of the knowledge changed. The adaptation level of the market — who could pick a lock, and therefore what a lock was worth — recalibrated over time.

His insurance broker reinstated the policy in 1991.

A brand cannot take back the discounts it has already sent. The customers who learned to wait are already waiting. The adaptation levels that have shifted have shifted.

But the next discount that goes to a customer who was going to pay full price anyway is another lesson being taught. Another lock being opened. Another permanent change in what every future price in this relationship will have to compete against.

*The locksmith who wants to restore the value of locks has to stop teaching everyone to pick them — one lesson at a time, starting with the next campaign.*

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/a6cecbef-a902-48b2-9a3c-6e44bb98cc96.jpg align="center")

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If your brain is already triaging this page for a 5-second window, skip the reading—the complete narrative is perfectly laid out in the infographic below.  

![](https://cdn.hashnode.com/uploads/covers/6a22deaebdc172ef88447d5e/4a84adad-4108-4542-a02e-23fc7cf17a8e.jpg align="center")

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*Published by Hetvabhas — independent analysis of brand communication infrastructure. No vendor agenda. No sponsored content. No false reasoning.*