The Science Behind Product Sampling Success on Campuses

Product sampling works on campus because it removes the risk of trying something new at the exact moment students are forming new habits. Behavioural science explains why: a free product creates goodwill, trying something beats being told about it, and a big life change such as starting university breaks old routines and leaves room for new ones.

This guide explains the main mechanisms, why they are stronger at university than almost anywhere else and what student survey data says about the results.

Key points

• Trial removes risk. A student who has tried a product no longer has to guess whether it is worth their money.

• Life changes break habits. Starting university is one of the biggest, so brand choices are unusually open in the first weeks.

• Reciprocity and the experience of using a product make a sample work harder than an advert of the same cost.

• Results can be measured. Across 196 Dig In brand surveys for 161 brands since 2018, the median brand scored 85% likely to buy again in 2025 and 88% in 2026.

The behavioural principles behind sampling

Trial removes the risk of a first purchase

Every first purchase is a small bet. A student on a tight budget weighs the price of an unfamiliar product against the chance of not liking it, and usually sticks with what they know. A sample takes the bet away. Once a student has tasted the drink or used the razor, the next purchase is a choice between known options, and the brand they have tried is one of them.

Habits are easiest to change when life changes

Researchers who study habit, including Wendy Wood and Bas Verplanken, describe how major life events disrupt the cues that keep routines running. Moving home, starting a job or starting university removes the familiar supermarket, the family bathroom cabinet and the brands someone else always bought. For a few weeks, choices that were automatic become deliberate again. A product that arrives in that window is being judged at the moment the new habit is formed.

Reciprocity

Robert Cialdini’s work on influence describes reciprocity: people tend to return a favour. A sample that arrives as a considered gift, on a day when students are carrying boxes up stairs and working out where the nearest shop is, is received very differently from a leaflet pushed into a hand at a busy fair. The goodwill attaches to the brand.

Experience beats a claim

Taste, smell, texture and fit cannot be fully conveyed by an advert. They can only be experienced. That matters most in categories where the product is the argument: food and drink, personal care, grooming. Across Dig In’s 2025 brand surveys, the median taste score was 8.8 out of 10 (18 surveys), which shows how often students rate a product well once they have tried it.

Social proof in shared spaces

Students in halls see what their flatmates eat, drink and use. A product that appears in a shared kitchen or bathroom is visible to others at the same stage of life, making the same choices. That visibility is a quiet form of recommendation that no paid placement can buy.

Why campuses amplify these effects

• Concentration. Hundreds of thousands of new students arrive in the same few weeks, most of them living in halls.

• First independent budgets. Many are buying their own shopping for the first time, so brand choices are being made, not inherited.

• Shared living. Kitchens, bathrooms and common rooms put products in front of peers every day.

• A clear window. The first weeks of term are when routines settle. Sampling later still works, but the habit may already be set.

Our page on why sampling works covers the case for sampling in more depth.

What student survey data shows

Dig In surveys students after they receive a product, using consistent questions so results can be compared across brands. The Dig In Trial Benchmark covers 196 brand surveys for 161 brands since 2018.

• Median brand: 85% likely to buy again (2025, 24 surveys) and 88% (2026).

• Median brand: 96% would recommend (2025, 20 surveys).

• Median taste score: 8.8 out of 10 (2025, 18 surveys).

Named campaigns sit around and above those norms. After Freshers 2024 sampling, 87.4% of students surveyed said they were likely to buy Gillette (n=1,703) and 90.2% said the same of Venus (n=3,530); see the Gillette and Venus results. After Hershey’s and Reese’s sampling at Freshers 2024, 89.7% said they were likely to buy again (n=3,381); see the Hershey’s and Reese’s results.

Two cautions. These are purchase-intent figures from students who have just tried a product: a strong signal, but not sales. And a single score means little on its own. The benchmark exists so a brand can see whether its result is ordinary or exceptional for a student sample.

How to design a sample that works with these principles

• Give enough to form a view. A product students can use more than once gives them a fair chance to judge it.

• Arrive at the right moment. Move-in day and the first weeks of term are when routines are being set.

• Make the next step obvious. Tell students where to buy it, and give them a reason to do so soon, such as a code or an offer.

• Ask what they thought. A short survey after trial tells you whether the product landed and with whom.

• Plan a second touch. A Live Activation, a January follow-up or an email keeps the brand present while the habit forms.

Where sampling has limits

Sampling amplifies a good product at the right price. It does not rescue a product students do not like, a price they cannot justify or a range they cannot find in the shops they use. If a sample scores well but sales do not follow, check distribution near campus and price before blaming the sample.

Questions brands ask

Why does product sampling work so well with university students?

Students are forming new routines in their first weeks at university, so their brand choices are open. A sample removes the risk of trying something new at that moment, and shared living means peers see the product too.

Does free sampling lead to sales?

Sampling creates trial and purchase intent, which are strong leading signals. To link a campaign to sales, use trackable codes, retailer data near campus or a test-and-control design across universities.

What is a good purchase intent score for a student sampling campaign?

Compare against a benchmark rather than judging the number alone. In Dig In’s brand surveys, the median brand scored 85% likely to buy again in 2025 (24 surveys) and 88% in 2026.

Working with Dig In

Dig In puts products into the hands of 500,000 students each September and surveys them afterwards, so you can see how your result compares with other brands. Get in touch to plan a sample around the moment your category is chosen.