More specifically, if most invitations can be assumed to be accepted, a regrets only RSVP will reduce the communication required by both host and guests.
Further research has shown that for shorter pieces of text, RSVP formats increased reading speed by 33% with no significant differences in comprehension or task load.
This hypothesis is consistent with the results of their study in which participants were instructed to detect animal targets in RSVP sequences, and then report their identities and locations.
The RSVP task involved viewing a stream of letters and digits presented against a series of changing checkerboards, and counting the number of times a digit was presented.