IJSP Number 7, 2025

International Journal of Supervision in Psychotherapy, Number 7, 2025 Page | 39 3.1. Temporal trends in psychotherapy supervision research (based on overlay visualization) The evolution of psychotherapy supervision research reflects shifts in theoretical frameworks, methodological approaches, and emerging challenges in the field. Using overlay visualization techniques, we can identify distinct periods of research focus, revealing how supervision scholarship has progressed from foundational competence- based models to contemporary, technology-enhanced, and culturally responsive practices. Early research (pre-2010): competence-based models and developmental frameworks In its initial stages, research on psychotherapy supervision was largely centered on competence-based training models, developmental frameworks, and standardized assessment practices [1. 2 9. . Supervision was primarily conceptualized as a structured, hierarchical process aimed at ensuring that trainees acquired the necessary clinical competencies, ethical awareness, and professional judgment to practice independently. During this period, supervision research heavily emphasized developmental models, which outlined how supervisees progressed through stages of competency, from novice to expert. These models provided structured guidelines for supervisors to tailor their approaches based on the supervisee's skill level, emphasizing formative feedback, progressive skill-building, and competency assessments 26. . Assessment practices were also a major focus, with studies exploring the reliability and validity of different evaluation methods in supervision. Researchers sought to establish standardized rubrics for assessing supervisee competence, performance, and readiness for independent practice 12. . While these models contributed to a structured, goal-oriented supervision process, they were often criticized for being overly rigid, neglecting relational and contextual aspects of supervision [3. Mid-stage research (2010–2017): relational aspects and multicultural competence By the 2010s, research began to shift toward exploring the interpersonal dimensions of supervision, particularly the supervisory alliance, power dynamics, and supervisee nondisclosure. Scholars recognized that effective supervision extended beyond competency assessments and technical training, requiring a strong working alliance between supervisors and supervisees 27. . Studies during this period highlighted the central role of trust, openness, and mutual respect in fostering productive supervisory relationships. The supervisory alliance was increasingly viewed as analogous to the therapeutic alliance, with research emphasizing its impact on supervisee learning, professional identity development, and willingness to disclose struggles or uncertainties [13. . At the same time, multicultural competence emerged as a growing area of interest. As psychotherapy training programs became more diverse, researchers sought to examine how supervision practices could be adapted to better serve supervisees from different cultural backgrounds 11. . The concept of cultural humility, introduced in clinical supervision literature, encouraged supervisors to acknowledge their own biases, create