Though lyric analysis is often and widely used, research that compares music therapy intervention has been inconclusive up to this point. Dr. Michael Silverman (2009) completed a study on lyric analysis and found it to be the third most used type of intervention. Music Therapists use lyric analysis in a variety of ways, but typically lyric analysis is used to facilitate dialogue with clients based on the lyrics, which can then lead to discussion that addresses the goals of therapy (Freed, 1987). Dr. Silverman also noted that the song that therapists found most effective in lyric analysis was "Lean on Me" by Bill Withers. Other popular choices were the songs "I am a Rock," "Bridge Over Troubled Water," "Concrete Angel," "Everybody Hurts," "Help," and "Let It Be." The choice of song is often based around the material and issues listed in the song, but therapists have stated they also choose songs based on their clients' preferences, and on their own personal tastes in music (Silverman, 2009).