ABSTRACT Individual learning styles, their complex mechanisms and their elusive physiognomies, have become the focus of increased experimentation in many subject matter areas. This article describes the salient features of five testing instruments which, though dissimilar in scope and emphases, illustrate the direction of recent trends. Included are Harry Reinert's ELSIE (Edmonds Learning Style Identification Exercise) with its major emphasis on the learner's preferred method of adopting and internalizing words; Joseph Hill's Cognitive Style Interest Inventory, a broad-base instrument which examines the interacting influences of communicative symbols, sensory experiences, and programmatic cues; Anthony Papalia's Learning Modalities and Individual Differences Inventories, a comparative approach in which the student's self-assessment of his cognitive preferences is juxtaposed with the teacher's observations; David E. Hunt's Paragraph Completion Method, which probes into the learner's conceptual maturity level; and the Dunn, Dunn, and Price Learning Style Inventory which is designed to analyze the influences of environmental, emotional, sociological, and physical stimuli in determining individual learning patterns.