Sentence:  In Chapter 1 we sought to move the field of <WSD>algesimetry</WSD> past the categorical approach toward a dynamic, contextual model consistent with the pioneering work of Melzack and Wall (1965), Sternbach (1968), Fordyce (1976), and others. 
Meaning of the word marked with <WSD> tags:  The study of responses to painful stimuli.