Means based on Likert-type scales ranging from zero to six. Items in italics represent the clips chosen for the analog study. Discussion Study 1 described the procedures for selecting and validating erotic film clips. The formative research described here provides a framework from which other arousal-based research can standardize the process for selecting erotica for use in a laboratory setting. In fact, most often it is the researchers themselves who have selected the stimuli Janssen et al.