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Plotnik et al. 10.1073/pnas.0608062103. |
Movie 1. This video was taken from the rooftop camera on Maxine and Patty's first day of mirror exposure and is an example of investigative behavior. Maxine, seen reaching her full trunk over the wall at the mirror and then elevating herself on her back legs and lifting her front legs up off the ground, appears to look over the top of the mirror wall by tilting her head to the right and over it.
Movie 2. This video was taken from the camera embedded in the mirror on Happy's third day of mirror exposure (T3). After an apparent mirror-mediated below-eye touch at the mirror, Happy engages in repetitive trunk raises while backing in and out of the mirror location. Because this behavior was not observed at any other location or at any time when the mirror was absent, we interpret this behavior as a form of mirror-testing or self-directed behavior.
Movie 3. This video was taken from the Elmo lipstick camera embedded in the mirror on Happy's first day of marking. Happy repetitively touches the mark or the area immediately around the mark with her trunk while in full view of the mirror. She never touches the sham-mark during this session.
Supporting Text
Mark and Sham-Mark Materials. The face paints used for the mark and sham-mark were obtained from Palmer Paint Products, Inc. (Troy, MI). The ingredients of both the white (mark) and glow-in-the-dark (sham-mark) face paints are as follows: calcium carbonate, dextrin vinyl acetate copolymer or vinyl acetate copolymer, water, glycerin, sodium lauryl sulfate, soyalecithin, sodium magnesium silicate, diazolidinyl urea, propylene glycol, methylparaben, and propylparaben. The white face paint (mark) also contains titanium dioxide for pigmentation [Food and Drug Administration (FDA) approved; Rev. 2002, 21CFR73.2575). The glow-in-the-dark (sham-mark) contains zinc sulfide for luminescence (which is not visible under normal sunlight) (FDA Approved; Rev. 2002, 21CFR73.2995).
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