  In this paper, we aim to investigate the effects of the anisotropy on the
scale-invariant power spectrum considering the matter-dominated collapsing
universe as background and look for the deviations from this scale invariance.
Having set up this background, we consider a massless scalar field and work out
the correlations, first by using the perturbative approach in which the
anisotropic background is approximated with an effective isotropic metric
represented by the metric of matter dominated collapsing universe, second by
directly solving the field equation numerically, and then obtain the power
spectrum for the range of modes which are of cosmological interest. Using both
techniques, we get an upper bound on the deviation in the power spectrum from
the scale invariance. We also work out the power spectrum for much smaller
modes and look at whether it is possible to explain the observed anomalies in
CMB via the matter bounce scenario.
