• Power-based classroom management emphasizes 'behavior alteration techniques' (BATs) and targeted messages (BAMs) to control classroom behavior, repeatedly tested across a series of Power in the classroom studies (III, IV, V, VI) to compare strategies such as immediate rewards and feedback [1][6][13][17].

• Nonverbal expressiveness and immediacy are shown to influence affective learning and perceived engagement, with experiments varying lecturer expressiveness in mediated or live instruction [5][10][17].

• Relations among teacher communication style, trait/state apprehension, and classroom outcomes (affect, engagement, and perceived effectiveness) suggest a mediational role for affective variables and attitudes toward instruction [3][8][11][7].

• Categorization and synthesis of 186 studies in 1974–1982 constitute early taxonomy-driven advancement in Instructional Communication, mapping domains like Teaching Strategies, Speech content, and Student Evaluation [9][4][12][11].

• Efforts to define and measure instructional communication competence and teaching effectiveness culminate in competencies, assessment procedures, adaptability measures, and pedagogical critiques [14][19][20][16][18].