/26684/1.hassmallThumbnailVersion/Exploring%20the%20construct%20validity%20of%20the%20Patient%20Perception%20Measure%20-%20Osteopathy%20%28PPM-O%29%20using%20classical%20test%20theory%20and%20Rasch%20analysis..pdf;/26684/1/Exploring%20the%20construct%20validity%20of%20the%20Patient%20Perception%20Measure%20-%20Osteopathy%20%28PPM-O%29%20using%20classical%20test%20theory%20and%20Rasch%20analysis..pdf