
8.4 Contextualization: Artificial Life and Art
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of their participation and should not necessarily have to be conscious of the pref-
erences they express, asking them to score the speakers more directly is not an
option.
There are several choices for sensors that can detect the distance or position
of humans. Which is best depends on cost, time, the size and furnishing of the
space, indoors or out, and any need to withstand attack. Cost-effective candidates
are floor pads, passive infrared (sensing movements of body heat sources within
an area, as is done for burglar alarms), sonar