  It has been shown that the new Self Creation Cosmology theory predicts a
universe with a total density parameter of one third yet spatially flat, which
would appear to accelerate in its expansion. Although requiring a moderate
amount of 'cold dark matter' the theory does not have to invoke the hypotheses
of inflation, 'dark energy', 'quintessence' or a cosmological constant
(dynamical or otherwise) to explain observed cosmological features. The theory
also offers an explanation for the observed anomalous Pioneer spacecraft
acceleration, an observed spin-up of the Earth and an problematic variation of
G observed from analysis of the evolution of planetary longitudes. It predicts
identical results as General Relativity in standard experimental tests but
three definitive experiments do exist to falsify the theory. In order to match
the predictions of General Relativity, and observations in the standard tests,
the new theory requires the Brans Dicke omega parameter that couples the scalar
field to matter to be -3/2 . Here it is shown how this value for the coupling
parameter is determined by the theory's basic assumptions and therefore it is
an inherent property of the principles upon which the theory is based.
