Enligt en United Press International-blurb som kördes i Provo Daily Herald och The Daily Times of Weirton 1959 lärde Judith Evelyn faktiskt teckenspråk för filmen:
Learns Sign Language HOLLYWOOD -- (UPI) - Judith Evelyn, whose speaking voice is one of the finest in the acting profession, took lessons in sign language for her role as a deaf- mute in Columbia's "The Tingler."