  A measurement of dijet correlations in p-Pb collisions at $\sqrt{s_{\rm
NN}}=5.02$ TeV with the ALICE detector is presented. Jets are reconstructed
from charged particles measured in the central tracking detectors and neutral
energy deposited in the electromagnetic calorimeter. The transverse momentum of
the full jet (clustered from charged and neutral constituents) and charged jet
(clustered from charged particles only) is corrected event-by-event for the
contribution of the underlying event, while corrections for underlying event
fluctuations and finite detector resolution are applied on an inclusive basis.
A projection of the dijet transverse momentum, $k_{\rm Ty} =
p_\rm{T,jet}^\rm{ch+ne} \; \rm{sin}(\Delta\varphi_{\rm{dijet}})$ with
$\Delta\varphi_{\rm{dijet}}$ the azimuthal angle between a full and charged jet
and $p_\rm{T,jet}^\rm{ch+ne}$ the transverse momentum of the full jet, is used
to study nuclear matter effects in p-Pb collisions. This observable is
sensitive to the acoplanarity of dijet production and its potential
modification in p-Pb collisions with respect to pp collisions. Measurements of
the dijet $k_{\rm Ty}$ as a function of the transverse momentum of the full and
recoil charged jet, and the event multiplicity are presented. No significant
modification of $k_{\rm Ty}$ due to nuclear matter effects in p-Pb collisions
with respect to the event multiplicity or a PYTHIA8 reference is observed.
