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Leslie Harlacker
frequently than is usual for experienced subjects as a whole. Intermediates
analyses reported here maintain these preliminary distinctions; however, the
results suggest that it will be interesting to investigate the differences among
factors – physical characteristics and activity patterns that might theoreti
produced). These factors included arm and hand injuries, however minor,
ing extensive arm and hand use (reported activities included martial arts,
woodworking, and the playing of various musical instruments); these data
were collected on the subject questionnaire. The three groups are statistically
identical (p < 0.05) for all these factors.
In addition to the human subjects, two bonobo subjects with several
et al. 1993; Schick et al.
1999). One, Kanzi, has been knapping for more than ten years; his sister,
Panbanisha, has been knapping for about six years.
Knapping task and subject participation
The knapping task in this study was simply to produce sharp, useable stone
while reducing two stone cores, one greenstone and one chert. This method
its expense is relatively moderate compared to other biomechanical analysis
techniques. These practical concerns were especially important with respect
to the bonobo subjects; they also allowed for a larger human sample to be
included.
choice, platform selection, and striking angle). The arm swing was not mod
eled for them, but they were able to observe other subjects (usually no more
novice). Novices were then required to participate in a practice session to
be available for each subject; this practice session was also offered to more
experienced knappers, but most declined.
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