Abstract Background The aim of the study was to confirm the validity and reliability of the Observation Scheme-12. a measurement tool for rating clinical communication skills. Methods The study is a sub-study of an intervention study using audio recordings to assess the outcome of communication skills training. This paper describes the methods used to validate the assessment tool Obse... https://www.roneverhart.com/Fender-Tone-Master-Twin-Reverb-Guitar-Amp-Blonde/