ABSTRACT
This chapter explains challenges and lessons of intersubjectivity theory for psychological assessment. According to intersubjectivity theory, the "self" is not a separate stable characteristic of an individual in fact, it cannot be described fully independent of the interpersonal system in which it is observed and/or measured. In any enterprise that involves human relationships (as psychological assessment certainly does), there is no way to completely remove the influence of the observer and/or assessor. In 1985, Constance Fischer published a groundbreaking book, called Individualizing Psychological Assessment, in which she laid out a coherent view of psychological assessment compatible with intersubjectivity theory, and then derived a set of practical guidelines for psychological assessment. The chapter explains the challenge of thinking intersubjectively. Benefits of thinking intersubjectively help us to cultivate a realistic humility that benefits our work. It elucidates how intersubjectivity theory fits with the practices of collaborative, phenomenological, therapeutic psychological assessment.
