Effects of Infants’ Pitch and Loudness on Joint Coordinated Engagement Scores in Face-to-Face with a Shared Tablet Condition

<p> In the face-to-face with a shared tablet condition, (A) higher mean pitch in infants corresponded with lower joint coordinated engagement (JCE) scores. (B) Louder vocalisations by infants were linked with lower JCE scores. </p>