Purpose: This study aims to offer an original criterion of assessment for examiners of practice-based doctorates in contemporary arts practices, based upon the degree of intrigue, perceptual and conceptual, afforded by the research outputs. It is argued that intrigue is the necessary stimulus for the states of attention required for the recognition of fresh understanding and the acquisition of new knowledge from such outputs. The paper is intended to support doctoral students structuring theses for such research, those responsible for assessing proposals in university cross-disciplinary research committees with limited experience of practice-based research and the examiners of such research. Design/methodology/approach: Acknowledging the several decades of work already published on practice-based research, this study adopts an aesthetic cognitivist position from which the visual arts are construed as powerful means of deepening our understanding, a source of non-propositional knowledge on a par with, although qualitatively different from, the way that the sciences are accepted as the means to propositional knowledge. Findings: A case study demonstrates the efficacy of applying the proposed criterion in the assessment of practice-based doctoral research. Social implications: Within the social context of academic research, the article strengthens the validation of practice-based research. Originality/value: The terms perceptual intrigue and conceptual intrigue are coined as values implicit in aesthetic cognitivism; they are construed as the initial stimuli for the state of attentiveness required for fresh understanding, and the degree of balance between them is proposed as an original criterion for the assessment of practice-based research.