Supplementary materials for 'A comparative study on the effectiveness of spiral and standard notations in learning harmonic structure'

<h4>Supplementary materials for 'A comparative study on the effectiveness of spiral and standard notations in learning harmonic structure'.</h4><p><br></p><p dir="ltr">These materials include the instructional videos, PDF, and interactive learning program that were provided to participants during the training and final testing problems of the experiment, as well as the final test questionnaire originally administered via Google Forms.</p>