This study attempts to investigate the impact of signalling, segmentation, and voice principles in IMV on college students' motivation, achievement, and cognitive load. A sample of 159 students from the University of Bisha College of Engineering, Saudi Arabia were treated with three IMV interventions: (a) IMV with signalling, segmentation, and voice principles, SSV, (b) IMV with signalling and voice principles, SiV, and (c) IMV with segmentation and voice principles, SeV.