The first aim of this study is to present a revised version of the Collaborative Interactions Scales. The most important changes are: faster scoring, reduction of scoring categories and introduction of new and more specific markers to rate patient collaboration. The second aim is to present data about validity and reliability. The sample consists of 80 psychotherapy sessions of different types of theoretical orientations. Six raters scored independently and randomly both the CIS and the new revised form. Results suggested that inter rater reliability was higher with the CIS revised form, the scoring time was shorter and convergent validity with CIS was good. Finally we will discuss clinical and empirical implications of the findings.