182 Joint Cognitive Systems
support from other (human or mach ine) agents to recogniz e ongoing events at
different s cales.
Shifting perspectives has turned out to be a fundamental aspect of JCSs. The
basi c role of different p erspectives was captured by Bartle tt ( 1932, p. 4):
We may consider the old and familiar ill ustration of the landscape artist,
the n aturalist, and the geologist who walk in the country together. The one
is said to notice and recall beauty of scenery, the other details of flora and
fauna, and the third the form ations of soils and rocks. In this case , no
doubt, the stimuli being s e lected in each instance from what is present, are
different for ea ch observer, and obviously the records made in recall are
different a lso. ...