“…In particular, questions have been raised by a body of work that suggests 87:2 R. Kelly et al people in close personal relationships appreciate the investment of effort into communication [21,33,34,46,47] and that effort in the selection and use of communication outlets is interpreted as a sign of mutual affection and care [6,17,38,50,60]. Correspondingly, there has been an interest in designing chat systems that use effort as a foremost driver of the interaction design, thereby providing users with positive opportunities for investing effort into their messages [30].…”