Point-light facial displays enhance comprehension of speech in noise.

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The processing of audio-visual speech: empirical and neural bases (2008, background): “Such sparse stimuli induce McGurk effects (albeit at a reduced level compared with full facial images; Rosenblum & Saldaña 1996) and an audio-visual gain for speech perceived in noise (Rosenblum et al. 1996).”
The Natural Statistics of Audiovisual Speech (2009, background): “For example, experiments with point light-displays, where the dynamic face is replaced by 12– 20 points which mimic its movement, reveal that such purely dynamic information can enhance speech perception [41] and can even be used to induce McGurk effects (albeit at a reduced level) [42].”
Perception of human motion. (2007, methodology): “In recent years, more refined PL animation techniques have been developed through the use of computer animation (Cutting 1978) and motion-capture technology paired with animation software (Ma et al. 2006, Vanrie & Verfaillie 2004).”