  We study the response of isovector orbital magnetic dipole (IOMD) transitions
to the quadrupole-quadrupole ($Q \cdot Q$) interaction, to the
isospin-conserving pairing interaction (ICP) and to combinations of both. We
find qualitatively different behaviours for transitions in which the final
isospin differs from the initial isospin versus cases where the two isospins
are the same. For $N=Z$ even-even nuclei with $J^{\pi}=0^+, T=0$ ground states
such as $^8Be$ and $^{20}Ne$, the summed $T=0 \to T=1$ IOMD from the ground
state to all the $J=1, T=1$ states in the $0 \hbar \omega$ space does not
vanish when the $Q \cdot Q$ interaction is turned off. The pairing interaction
(ICP) alone leads to a finite transition rate. For nuclei with $J=0^+, T=1$
ground states such as $^{10}Be$ and $^{22}Ne$, the summed $T=1 \to T=1$ IOMD
$does$ vanish when the $Q \cdot Q$ interaction is turned off, as is expected in
a good scissors-mode behaviour. However this is not the case for the
corresponding sum of the $T=1 \to T=2$ IOMD transitions. In $^{22}Ne$ (but not
in $^{10}Be$) the sum of the $T=1 \to T=2$ IOMD transitions is remarkably
insensitive to the strengths of both the $Q \cdot Q$ and the ICP interactions.
In $^{22}Ne$ an energy weighted-sum is similarly insensitive. All our
calculations were carried out in the $0 \hbar \omega$ space.
