  This study explores the impact of AI-generated digital self-clones on
improving online presentation skills. We carried out a mixed-design experiment
involving 44 international students, comparing self-recorded videos (control)
with self-clone videos (AI group) for English presentation practice. The AI
videos utilized voice cloning, face swapping, lip-sync, and body-language
simulation to refine participants' original presentations in terms of
repetition, filler words, and pronunciation. Machine-rated scores indicated
enhancements in speech performance for both groups. Though the groups didn't
significantly differ, the AI group exhibited a heightened depth of reflection,
self-compassion, and a meaningful transition from a corrective to an enhancive
approach to self-critique. Within the AI group, congruence between
self-perception and AI self-clones resulted in diminished speech anxiety and
increased enjoyment. Our findings recommend the ethical employment of digital
self-clones to enhance the emotional and cognitive facets of skill development.
