The Affinity, an instrument designed to measure sexual interest using viewing time, has recently been upgraded from version 2.0 to version 2.5. The Affinity presents slides depicting non-pornographic images of people varying by age and gender. The expected Chi square weights established for Affinity 2.0 for non-pedophilic, exclusively heterosexual females may have been impacted by Affinity 2.5's 42.9% increase in the number of slides. There were two purposes to this study. The first was to establish new expected Chi square weights for non-pedophilic, exclusively heterosexual females using Affinity 2.5. The second purpose was to employ a Chi square procedure (in place of traditional correlational methods) to re-examine the temporal stability of the Affinity 2.0. Data from 63 participants, who were administered the Affinity 2.5, were analyzed. Results of the analyses revealed notable similarity between the expected Chi square weights created for Affinity 2.5 and those for Affinity 2.0. The re-examination of Affinity 2.0 temporal stability using Chi-square procedures suggested that 86% of subjects were consistent in their responses from time 1 to time 2.