Blurb:

A brief overview of Part Four.Part Four explains how the patterns of expression specific to professional cultures often restrict access to information in ways that affect the quality and recall of understandings. Comparing the genetics and radiology data shows why understanding does not simply result from presenting well-designed explanations. Strategies intended to support comprehension may feature interpretive contingencies that restrict understanding. However, data related to the interventional radiology consultations show how patterns of interaction involving visual resources can replace commonplace restrictive patterns of interaction in medical consultations, and help patients develop recallable understandings of useful medical information.