In the published article, there was an error. We incorrectly stated that the piezoelectric actuators were 30cm in diameter when they were 3cm in diameter.
A correction has been made to Introduction, Paragraph four. This sentence previously stated:
“Mechanical Affective Touch Therapy prototype devices use MP3 signal generators wired to a set of digital amplifiers and 30 cm round ceramic piezoelectric actuators which translate the signal to gentle vibrations on the areas of application behind the patient's ears.”
The corrected sentence appears below:
“MATT prototype devices use MP3 signal generators wired to a set of digital amplifiers and 3 cm round ceramic piezoelectric actuators which translate the signal to gentle vibrations on the areas of application behind the patient's ears.”
The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.
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