In small-scale design research projects, researchers often take on many different roles: designers of artifacts or activities, co-present participants, and analysts of video documentation. There are some obvious risks with one person fulfilling many different roles in a project: A designer may be biased towards her own design proposals, and have difficulties distinguishing between the actual form of the prototype and the intentions behind it. In addition, adopting dual roles as both protagonist and video analyst creates risks for biased interpretations. Referring to examples of fieldwork in educational settings, a conceptual division between design and enactment is proposed as a tool for mapping out and disentangling the different roles of a design researcher in a small-scale project.