Product Personality Assignment
Participants are given a selection of product designs and a questionnaire of different personalities that they assign to designs (list of Briggs-Myers, e.g. "sensible", "friendly"). They are also asked about the reasons for the selections.
Most suitable for comparing different visual designs.
This has been done in a focus group session, but could be done in individual interviews as well.
The questionnaire is a lightweight method for collecting experiential data of this kind.
It may be hard to map the results to product improvement, unless the participants can analyse the reasons why they picked a certain personality.
Jordan, P. (2003) Designing Pleasurable Products
References describing the method