The focus of my research is a cluster of philosophical questions about evidential reasoning, ideals of objectivity, and the role of values in science that arise in archaeological practice. Initially this interest was sparked by fieldwork in historical archaeology in Canada and on prehistoric sites in the U.S. southwest and central Mexico in the 1970s and 1980s, at just the time when the New Archaeology was generating intense debate about the scientific status of archaeology. I argued for a pluralistic approach to questions about the goals and practice of archaeology in my dissertation, Positivism and the New Archaeology (1982), and subsequently expanded this line of inquiry in response to the relativist challenges posed by postprocessual critics of the New Archaeology. In Thinking from Things (2002) I develop a model of evidential reasoning designed to capture the strategies of triangulation and the role of diverse bodies of background knowledge by which archaeologists stabilize their interpretations of data as evidence. I have since made the case for reconceptualizing ideals of objectivity in terms that make sense of the ways in which situated interests and values can be a resource in archaeological research. I am currently developing these lines of thinking in projects on feminist standpoint theory and on research ethics.