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Clinician FAQs
General
Interpretation
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Validity
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It is very likely that having others present in the room can influence or invalidate the Visual Reaction Time™ data. In the fall of 1996, Abel Screening was evaluating 125 normal males. To accommodate this large number of normals, and because of space limitations, we ran these normals four at a time with the four units arranged in the same room, so no individual could see another individual’s images or the rating process. The resultant data was markedly different than any other data we had obtained with normal males, and we strongly suspected that the presence of others in the room invalidated the testing procedure. We searched the literature and found the article by Marvin Brown, et al, entitled “Factors Affecting Viewing Time of Pornography,” located in The Journal of Social Psychology, 1973, 90, 125-135. This is a study of forty male college students asked to make various ratings of slides that depicted increasingly graphic, erotic material while their viewing was measured. The experimenters anticipated that the presence of others in the room would contaminate viewing time. The experiment involved measuring viewing time; half of the subjects viewed the images alone in the room and rated them for their erotic-pornographic content, while the other half did a similar rating with three individuals in an audience. When subjects were alone, there was a clear positive relationship between the images’ reported erotic content and the subjects’ viewing the images longer. When the audience was present, this very clear effect was lost (see Figure 1 on page 132 in the reference). In every case of the fifteen images viewed, the presence of the audience dramatically reduced viewing time and destroyed the relationship between the increased erotic ratings and increasing looking time. Based upon these two experiences, we have made it clear in our manual that once a client is trained up on using the computer/image unit during the practice images, the client should be alone in a room by themselves when viewing the images. Having others in the room can influence or invalidate viewing time measurement. (Question originally submitted 7/8/99.)
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