That’s a greatly oversimplified description of what could happen in actual interrogation rooms if the results of a recent
study in the journal Applied Cognitive Psychology are widely adopted. The study is the first to investigate whether drawing is an effective lie detection technique in comparison to verbal methods.
Researchers hypothesized that several tendencies would become evident in the scribbles and sketches of liars not found in those of non-liars. For instance, they suspected that liars, when asked to sketch out the particulars of a location where they hadn’t really been to meet someone they hadn’t really met, would provide less detail in their drawings. They also suspected that the drawing would seem less plausible overall, and would not include a depiction of the person they allegedly met.
Finally, they hypothesized that non-liars would use a “shoulder-camera” perspective to draw the situation – a direct, line-of-sight view that previous research suggests is more indicative of truth telling. Liars, they suspected, would use an “overhead-camera” perspective, indicating a sense of detachment from the situation.