Theory and Applications Robert F. DeVellis, Carolyn T. Thorpe. A major advantage of visual analog scales is that they are ... A common example is the use of simplified “smiley” faces ranging from a strong smile to a 114 Scale Development.
In the Fourth Edition of Scale Development, Robert F. DeVellis demystifies measurement by emphasizing a logical rather than strictly mathematical understanding of concepts.
In the Fourth Edition of Scale Development, Robert F. DeVellis demystifies measurement by emphasizing a logical rather than strictly mathematical understanding of concepts.
5 Guidelines in Scale Development Thus far , the material presented has been fairly abstract . We now look at how this knowledge can be applied . This chapter provides a set of specific guide- lines that investigators can use in ...
All chapters have been updated, and the book strikes a balance between including relevant topics and highlighting recent developments in measurement while retaining an accessible, user-friendly approach to the material covered.
In the Fourth Edition of Scale Development, Robert F. DeVellis demystifies measurement by emphasizing a logical rather than strictly mathematical understanding of concepts.