Stefan's past research interests have included performance practice in the classical and romantic eras, neurological and neuro-linguistic programming, music leadership and management. Over the past decade, Stefan's research has focused on cognitive and metacognitive learning-teaching processes, summative and formative assessment in musical performance. His research interests and expertise lies in:
- mixed methods research design approaches
- teacher and student instructional and assessment practices
- student & teacher motivation & sources of motivation (contextual factors)
- self-regulation of learning and formative assessment principles, and how these can enhance the learning process and outcomes
- assessment motivation
- student & teacher self-reflection
- assessment analytics (standards, teacher judgment, moderation techniques, formative & summative forms)
- educational reform and accountability
- initial & continuing teacher education
- teacher professional learning, professional development & practice
- music performance.