Background Designers often consider consumer design evaluations. However, whether consumer design evaluations are trustworthy has been rarely discussed. We propose that consumers equate the concept of design with the concept of uniqueness, which suggests that their design valuations are context dependent and unstable.
Methods We test our proposition by conducting one pilot study and three main studies. The pilot study examines which criteria consumers consider when evaluating a design. The three main studies test whether consumer design evaluations depend on the situation and unique products.
Results The results of the pilot study and three main studies demonstrate that subjects evaluated design using aesthetic and functional attributes and their design evaluations were based on the attributes that are not popular in a specific situation.
Conclusions This study contributes to the academic discussion of whether consumer design evaluations are stable. Our findings demonstrate that consumers construct design evaluations on the spot. Therefore, designers who have accumulated professional experience and knowledge, are recommended to follow their own design evaluations rather than the voice of customers.
