Establishing Content-Related Validity Evidence for Assessments in Counseling: Application of a Sequential Mixed-Method Approach

Establishing content-related validity evidence is considered essential to draw conclusions about a scale’s quality. The purpose of this conceptual article is to provide best practice recommendations in the content validation procedure of scale development in the field of counseling, incorporating both qualitative and quantitative content review phases as a sequential mixed-method approach. In line with this goal, a description of the four basic sequential stages of the content validation procedure is provided, including a brief overview of content validity and Lawshe’s (1975) technique as a quantitative approach to content validity. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.