Can EmotionTrac Measure Emotions in Radio Ads?

The simple answer is "YES!".

The premise driving this theory is derived from research conducted on people who are blind and their ability to express the same emotions as sighted people while listening to audio content.

To confirm this, twenty one studies provided evidence that blind and sighted people spontaneously produced the same pattern of facial expressions. This infers that even though radio is processed auditorily and not visually, the facial reactions are indeed authentic and identical to those found in individuals who watched a TV commercial.

Source: [National Library of Medicine](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5902524/#CR16) *"The role of visual experience in the production of emotional facial expressions by blind people."*