The subjects who finally decided to participate in the ADHD music therapy group (n = 18) completed a preference questionnaire consisting of a 5-point Likert Scale, and audio files were sent using a smartphone or email. To minimize the influence of lyrics, genres like pop without lyrics, traditional Korean music, and New Age were selected.
Also, music that matched the participants’ preferences (having been checked as “normal” or “like” by them) was selected [52 (link)].
The music listening used for the music therapy consisted of Motivating, Relaxing, and M + R (a total of three songs were selected: Arirang, Golden Star, White Tower), and were selected through a preference survey. Based on a previous study [53 (link)], the chosen songs were composed in the key of C, D, and G Major, and mainly used major chords, with some minor chords interspersed to create interest in the music [53 (link)].