The spatial arrangement of social network data in graphs can influence
viewers' perceptions of structural characteristics such as prominence
, bridging and grouping. To study the extent of this effect, we conduc
ted an experiment with 80 graduate students. Each student viewed three
of five different spatial arrangements of the same network. We found
that viewers' perceptions of structural features of the network change
d as the spatial arrangement of the network changed. (C) 1997 Elsevier
Science B.V.