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Figure 3.7 Dynalinking used in the PondWorld software. In the background is a simulation
of a pond ecosystem, comprising perch, stickleback, beetles, tadpoles, and weeds. In the
foreground is a food web diagram representing the same ecosystem but at a more abstract
level. The two are dynalinked: changes made to one representation are reflected in the
other. Here the user has clicked on the arrow between the tadpole and the weed rep-
resented in the diagram. This is shown in the PondWorld simulation as the tadpole eating
the weed. The dynalinking is accompanied by a narrative explaining what is happening and
sounds of dying organisms.
Figure 3.9 A see-through
handset-transparency does not
mean simply showing the insides of
a machine but involves providing a
good system image.
