Monarch PPG (Behavioral Technology, Inc., Salt Lake City, Utah) The Monarch Adult Projective Audio Visual Set, Version 5 (Salt Lake City, Utah) was a commercially available set of standardized stimulus materials that was used to assess all subjects. The stimuli contained audio and visual depictions of males and females comprising preschool and grammar school children, adolescents, and adults. The audio scripts were based on a projective, rather than explicit, portrayal of sexual activity. Unlike most other PPG visual stimuli, the set contained clothed pictures of children (all child models were shown in bathing suits or underwear). No lewd or provocative poses were presented (Byrne, 2000).