Show contrasts

Information is rarely perceived in isolation. The context—what is presented immediately before or alongside it—shapes interpretation. Intuitively, information should speak for itself and have an impact independent of its environment. Yet in practice, customer experience designers report surprising effects: the same product feature receives different evaluations depending on what was shown previously. The question is: To what extent does immediate contrast determine the perception of value, quality, and attractiveness—and what evidence exists for this phenomenon?

Studies

Ebbinghaus size illusion

Hermann Ebbinghaus demonstrated a fundamental perceptual effect in 1902 that was later named after him. In his experiment, he and subsequent researchers showed participants two identically sized circles—both had exactly the same diameter. The crucial difference: one circle was surrounded by larger circles, the other by smaller ones. Participants were asked to estimate which center circle was larger. The surprising result: although both circles were identical, nearly all participants judged the circle surrounded by smaller circles as significantly larger—on average by 10-15%. The brain uses the immediate context as a frame of reference. The same objective size is perceived differently depending on its surroundings.

The Dish Experiment

Christopher Hsee conducted a groundbreaking experiment on contextual evaluation at the University of Chicago in 1998. He asked 162 participants to evaluate two dinnerware sets and indicate their willingness to pay. Set A contained 40 pieces, all intact. Set B contained 24 pieces, also all intact. Half of the participants saw both sets together (joint evaluation), while the other half saw only one set (separate evaluation). In separate evaluation, willingness to pay for Set A averaged $33 and for Set B $23—more pieces, more value. But in joint evaluation, the judgment completely reversed: Set A was valued at $32, while Set B suddenly dropped to only $30. The direct comparison made it clear that Set A offered more pieces. Without a reference point, only absolute quantity mattered; with a reference point, the contrast dominated the evaluation. Same value, different contexts, opposite preferences.

Principle

Which principle for Customer Experience Design can be derived from this? The principle of deliberate contrast states that product features and offerings are communicated far more effectively through strategic juxtaposition with appropriate reference points than through isolated presentation. In customer experience, this means that perceptions of price, quality, or service can be significantly influenced by the chosen context—a premium offering appears more attractive when placed next to a luxury alternative, while the same offering seems overpriced when positioned next to a budget option. This principle is particularly effective in decision-making situations involving multiple options, but loses impact with highly emotional choices or firmly established preferences. The following guidelines demonstrate how to implement this principle in practice.

Guidelines

Design price architecture through anchor options

Strategically position a premium option next to your main product, even if few customers buy it. This expensive option functions as a contrast anchor, making your middle-tier offering appear more attractive. For subscription models, present three tiers: Basic, Standard, and Premium. Standard becomes the preferred choice because it seems affordable compared to Premium while appearing valuable compared to Basic. Without the Premium tier, customers would perceive Standard as expensive.

Show before-and-after comparisons directly side by side

Never present improvements in isolation—always show them in direct contrast. For software updates, use a split-screen comparison of the old versus new interface. For process optimization, display the old lead time alongside the new. For energy efficiency, present previous and future consumption side by side in the same visualization. Spatial contrast amplifies the perceived improvement far more effectively than numerical statements alone.

Position strengths against competitors' weaknesses

Identify the critical dimension where you hold a clear advantage. Then make this dimension your focal point of comparison. If your service is faster, display your solution's response times directly alongside the industry average. If your solution is simpler, position your 3-step setup next to the 12-step alternative. Contrast on the relevant dimension amplifies your advantage far more effectively than any standalone claim. Critical: Only select dimensions where you genuinely outperform the competition.

Always show customer success stories with the initial situation

CX Guideline: Always Show Customer Success with Baseline Context Testimonials and case studies lose impact without contrast to the initial situation. Don't simply state "Customer achieved 30% revenue increase." Instead, frame it as "Before: Stagnating at 2% growth. After: 30% revenue increase." The transformation becomes tangible through contrast. Structure success stories as before-after narratives with clear contrasts: slow→fast, complex→simple, unprofitable→profitable. This contrast makes the improvement both credible and comprehensible.