def METHOD_NAME(self):
    """Connect spatial population sliced with step"""
    step = 2
    ref = np.copy(self.reference)
    ref[1::step] = 0
    for pos in [self.free_pos, self.grid_pos]:
        nodes = nest.Create("iaf_psc_alpha", positions=pos)
        nest.Connect(
            nodes[self.middle_node], nodes[::step], conn_spec={"rule": "pairwise_bernoulli", "p": self.parameter}
        )
        self._assert_histogram(nest.GetConnections().target, ref)