Differences in parents’ treatment of their various children (e.g., favoritism), and which may be evident with identical twins in order to accentuate their differences (e.g., by dressing them differently). Parents who act as ‘differentiators’ in this sense are contrasted with ‘twinners’ or ‘egalitarians’ that try to treat twins as a single unit. This distinction appears to be mediated not only by zygosity, but also by such factors as social class and birth order. While identical twins are subjected to less differentiation than their dizygotic counterparts, most parents of twins tend to fall somewhere in between these two extremes
See Dizygotic twins, Intuitive parenting, Monozygotic twins, Parenting, Parenting styles