Consideration is given to available experimental results in the literature for the compliance and stress relaxation of polystyrene. It is shown that shear-compliance data from three independent sources correlate very well over the entire glass-rubber transition. On the other hand, available elongational stress-relaxation data from four independent sources indicate a lack of agreement, with overall discrepancy on the order of four decades in time for E(t) over the entire transition region. By making use of the Knoff-Hopkins algorithm, the Leaderman approximation and a new procedure based on a least-squares collocation method, the above correlation for J(t) is used to generate G(t) which, in turn, is used to obtain E(t), assuming a constant compressibility. The resulting correlation indicates the need for further experimental work in this area.