TechSmith conducted a global study to determine how AI voices and avatars affect learning. I was surprised at how well the high-quality AI voices performed. We seem to have crossed the threshold where high-quality AI voices perform comparably to human voice actors. I was also surprised at how well the AI avatars did, although their recommendations for specific use cases do make some sense. I wish they'd also done a separate control with no narrator visible on screen (AI or human). The fact that AI avatars can be comparable to humans in some instances isn't that shocking, I guess, but I really want to see how it compares to just having the slide content and no face on screen.
What really makes learners pay attention? A voice that sounds clear, warm, and polished — not whether it’s human or AI. As voice quality improved in the study, so did professionalism ratings. In fact, 92% of viewers said the high-quality AI voice made the video feel professionally produced.
Results from the “pop quiz” portion of our study make the pattern clear: correct answers increased as voice quality improved. In fact, the high-quality AI voice produced the strongest retention numbers, aside from one low-quality human outlier.
But are AI voices distracting overall? It depends. Low-quality, synthetic voices are unmistakable and draw attention away from the content. When the AI voice sounds natural, many viewers can’t distinguish it from a human voice. The difference is less jarring, and information retention holds steady or even improves.
AI avatars aren’t distracting by default, but size matters. When an avatar fills the screen, viewers are more likely to notice robotic traits like lip sync issues, eye contact, limited facial movement, awkward blinking, or unnatural breathing.
The right format depends on your video’s purpose. Use this quick decision guide:
Screen-heavy, procedural, and frequently updated content: High-quality AI voice with screen recording, plus an optional AI avatar in PiP.
Emotionally sensitive, culture-setting, or leadership-driven content: Human presenter with a human voice.
Long-form, concept-heavy learning: A mix — human-led modules for core ideas, supported by AI-voiced micro-lessons and refreshers.