Mere-Exposure effect

Insights

What is the “mere exposure effect,” and what does it have to do with VAC?

The mere exposure effect posits that we begin to like and trust things we see often, provided the experience is neutral or positive. We prefer what we recognize. However, in out-of-home (OOH) advertising, “counting contacts” is not enough. The key is: how many contacts are actually visible and perceived? This is why the connection between the mere exposure effect and VAC (Visibility Adjusted Contacts) is essential:

  • The mere exposure effect explains why repeated exposure builds brand equity.

  • VAC ensures we only count the exposures that actually had a realistic chance to influence the consumer.

Why aren’t “standard contacts” enough when discussing mere exposure?

Question: Why aren’t “gross contacts” sufficient when we want to build recognition? Answer: Because not all contacts are created equal. A contact where:

  • The site is at eye level,

  • The motif is legible from a distance,

  • The person is moving slowly (e.g., at a bus stop or in a subway station),

…is entirely different from a contact where the site is far away, the angle is poor, or the motif is difficult to read in passing. The mere exposure effect is triggered by actual, perceived impressions, not by theoretical possibilities of seeing a site. This is why VAC is so crucial: it adjusts contacts based on visibility, ensuring you know how many visibility adjusted contacts your campaign is actually delivering.

How does VAC work in practice?

Question: What does Visibility Adjusted Contacts actually mean for a (D)OOH campaign? Answer: VAC accounts for the probability that a person will:

  1. See the site (visibility).

  2. Have enough time to perceive the message (opportunity to see).

Factors influencing this include:

  • Placement: Height, distance, and angle.

  • Format: Size of the site.

  • Traffic flow: Speed, direction, and dwell time.

  • Environment: Visual noise and competing impressions.

The result is a more honest metric: contacts adjusted for visibility. These are the only contacts relevant to the mere exposure effect, as these are the specific moments of exposure that can actually build recognition, security, and preference.

How is the mere exposure effect strengthened when JCDecaux maximizes VAC?

Question: What happens when we combine a network built for reach and frequency with sites optimized for high visibility (VAC)? Answer: You get the best of both worlds:

  • You reach many people (often): Via national, metro, premium, city, and local networks in Sweden’s 25 largest cities.

  • You reach them with contacts that are actually visible: The placement, formats, and flows are selected to maximize VAC, not just gross contacts.

The mere exposure effect is strongest when the same person is exposed multiple times through clear, legible, and visually dominant impressions—exactly what VAC helps you secure.

The connection between VAC and mere exposure in the subway

Question: Why is the subway, using JCDecaux’s network, so effective for both VAC and mere exposure? Answer:

  • Slower movement: Travelers stand still on platforms, ride escalators, and wait at entrances, giving them more time to perceive the message.

  • Repeated journeys: The mere exposure effect thrives when the same person sees the same message repeatedly during their daily commute.

  • Strategic placement: Formats like Metro Eurosize, MetroVision, Metro Digisize, and Metro Impact are specifically designed to provide high actual visibility.

On our 14 largest concept stations in Stockholm, you reach 92% of all subway travelers weekly. By using the right combination of formats, ensuring the message follows the traveler through the station, and utilizing “share of time” so you appear on multiple screens simultaneously, you increase both VAC and the number of repeated, qualitative exposures per person.

How does VAC and mere exposure work in national networks?

Question: How do national networks help you build more visibility adjusted contacts? Answer: When purchasing networks like Eurosize National or Digisize National, you don’t just get broad geographical spread. You get:

  • Sites selected for high visibility where people move the most.

  • A structure tailored to create both reach and frequency.

  • A setup that maximizes the number of times the target audience actually sees your message (VAC).

This ensures the mere exposure effect is based on real, perceived contacts rather than theoretical numbers.

How do premium and city networks increase the value per VAC?

Question: Is a VAC in a premium network equivalent to a VAC anywhere else? Answer: All visibility adjusted contacts are important, but some environments carry more weight. In our premium networks (Stockholm, Gothenburg, Malmö) and city networks, exposure happens in environments where:

  • Flows are intense.

  • Purchasing power is often higher.

  • Focus and engagement are greater.

Every VAC here doesn’t just build recognition; it often occurs closer to the decision-making situation (on the way to work, shopping, dining, or events). Mere exposure becomes a question of how many times you were seen in relevant, high-spending contexts.

How do local networks help you create high VAC per individual?

Question: Why are local networks so effective for the mere exposure effect when viewed through the VAC lens? Answer: Local networks (e.g., Eskilstuna, Gävle, Uppsala, etc.) allow you to:

  • Focus reach on a specific geographical area.

  • Create high frequency—many VACs per individual.

  • Build deep everyday presence where the target audience lives, shops, and lives their lives.

This ensures you don’t just reach many people; you reach the same people multiple times with high visibility—the exact combination needed for the mere exposure effect to boost liking and purchase intent.

How to approach this as an advertiser: Mere Exposure + VAC + JCDecaux

  1. Start with the goal: Recognition. Mere exposure is the core of brand building. Determine how often you want the target audience to see you, for how long, and in which everyday situations.

  2. Plan for reach and frequency, but measure in VAC: Choose networks based on whether you want to reach everyone, most people, or a select few, and how many VACs per person you aim to achieve.

  3. Use JCDecaux’s structured networks: Combine above-ground surfaces (billboards, bus shelters) with underground surfaces (subway networks, MetroVision) to create a cohesive daily journey with many qualitative exposures.

  4. View the peacock effect and mere exposure as two sides of the same coin: Large, spectacular formats (peacock) attract the gaze; repeated, visible contacts (VAC + mere exposure) build security and preference.

In short: The mere exposure effect explains why you should be seen often. VAC helps you ensure that you are actually being seen.