Every arc always has a definite direction , i.e. arcs are arrows ( Novak , 1998 ) .
learning creating and using knowledge concept maps as facilitative tools in schools and corporations lawrence erlbaum associates
Joseph Donald Novak
Very briefly , concept maps show the relationships between concepts labelling both nodes and arcs . Every arc always has a definite direction , i.e. arcs are arrows ( Novak , 1998 ) . In contrast , mind maps spread from a centre , with branches radiating out .
Every arc always has a definite direction , i.e. arcs are arrows ( @@CITATION ) .