Does Singing a Low-Pitch Tone Make You Look Angrier?

While many studies have shown that auditory and visual information influence each other, the link between some intermodal associations are less clear. We here replicate and extend an earlier experiment with ratings of pictures of people singing high and low-pitched tones.
To this aim, we video recorded 19 participants singing high and low pitches and combined these into picture pairs. In a two-alternative forced choice test, two groups of six assessors were then asked to view the 19 picture pairs and select the "friendlier", and "angrier" expression respectively. The result is that assessors chose the high-pitch picture when they were asked to rate "friendlier" expression. Asking about "angrier" expression resulted in choosing the low-pitch picture. A non significant positive correlation between sung pitch ranges from every participant to the number of chosen high-pitch resp. low-pitch pictures was found.