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Existing research on product design has found that a design’s complexity is an important antecedent of consumers’ aesthetic and behavioural responses. This paper aims to shed new light on the relationship between design complexity and perceptions of design quality by taking the effects of consumers’ naïve theories into account.

The hypotheses of this paper are tested in a series of three experiments.

The findings from three studies show that the extent to which consumers prefer more complex product designs to simpler ones depends on the extent to which they believe that the complexity of a design is indicative of the effort or of the talent of the designers involved in the design process. These competing naïve theories, in turn, are triggered by contextual information that consumers have at their disposal, such as the professional background of a designer or the brand that is associated with a particular design.

This research was limited to a design's complexity as the central design element and to the effects of two naïve theories. Future research may also take other design factors and consumer heuristics into account.

This research reveals that the extent to which managers may successfully introduce both complex and simple designs may depend on the reputation of a company’s designers and the prestige of a brand.

This research examines design complexity from a novel theoretical perspective and shows that the effect of design complexity on perceptions of design quality is contingent on two specific naïve theories of consumers.

In many industries, customers are offered the opportunity to revise their initial decision in return for a superior but more expensive service option, a selling technique that is typically referred to as upselling. Drawing on the research on customers’ service experience, cognitive effort, decision justification, and goal framing, the purpose of this paper is to conceptualize upselling as a two-stage decision process where the process of making the first decision (i.e. deciding on an initial service option) affects the final decision (i.e. the decision for or against the upsell offer).

First, qualitative interviews were conducted both with customers as well as managers. Moreover, in two experimental studies, different scenarios depicted an upsell situation that is common in many service encounters. After choosing a hotel room or rental car for reservation, participants were confronted with differently framed arguments to induce a shift toward an enhanced but more costly version of the initially chosen service option.

The qualitative interviews reveal that upselling is a common practice in many companies and that the manner in which the upsell is communicated has a considerable influence on its effectiveness. The first experimental study finds that the cognitive effort that customers expend in the initial choice moderates the effect of upsell messages using different goal frames. The second experimental study shows that customers are only affected by different goal frames when they feel responsible for the outcome of the final decision.

The findings provide a number of useful guidelines for designing upselling strategies and may also be used to segment a firm’s customer base. On a more general level, this research also raises managers’ awareness of the sequential nature of upselling decisions and the customer’s intrinsic need to justify an upsell choice.

The studies contribute to the literature on customers’ service experience and upselling strategies. Upselling is conceptualized as a two-stage process in which customers’ experience in one phase influences their behavior in later stages. The underlying psychological mechanisms of this effect are also highlighted by referring to customers’ need to justify service choices to themselves.