[MARMAM] new publication on dolphin cognition
Adam A. Pack
pack at hawaii.edu
Tue Mar 20 09:06:24 PDT 2007
We are pleased to inform you of the following new publication on
bottlenosed dolphin cognition. For pdf reprints, please contact Dr.
Adam Pack at pack at hawaii.edu. I am out with our field project
studying Maui's humpback whales right now, so email contact is best.
Pack, A. A. & Herman, L. M. (2007). The dolphin's (Tursiops
truncatus) understanding of human gazing and pointing: Knowing what
and where. Journal of Comparative Psychology, 121, 34-45.
The authors tested whether the understanding by dolphins (Tursiops
truncatus) of human pointing and head-gazing cues extends to knowing
the identity of an indicated object as well as its location. In
Experiment 1, the dolphins Phoenix and Akeakamai processed the
identity of a cued object (of 2 that
were present), as shown by their success in selecting a matching
object from among 2 alternatives
remotely located. Phoenix was errorless on first trials in this task.
In Experiment 2, Phoenix reliably
responded to a cued object in alternate ways, either by matching it
or by acting directly on it, with each type of response signaled by a
distinct gestural command given after the indicative cue. She never
confused matching and acting. In Experiment 3, Akeakamai was able to
process the geometry of pointing cues (but not head-gazing cues), as
revealed by her errorless responses to either a proximal or distal
object simultaneously present, when each object was indicated only by
the angle at which the informant pointed. The overall results
establish that these dolphins could identify, through indicative cues
alone, what a human is attending to as well as where.
Adam A. Pack, Ph.D.
Vice President and Program Manager for Research and Education
The Dolphin Institute
P.O. Box 700694
Kapolei, HI 96709
email: pack at hawaii.edu
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