Power-law sensitivity to the initial conditions at the edge of chaos p
rovides a natural relation between the scaling properties of the dynam
ics attractor and its degree of nonextensivity within the generalized
statistics recently introduced by one of the authors (C.T.) and charac
terized by the entropic index q. We show that general scaling argument
s imply that 1/(1 -q) = 1/alpha(min) -1/alpha(max), where alpha(min) a
nd alpha(max) are the extremes of the multifractal singularity spectru
m f(alpha) of the attractor. This relation is numerically verified in
standard D = 1 dissipative maps.