<p>NEW YORK (AP) -- After analyzing six decades of expert research on corporal punishment, a psychologist says parents who spank their children risk causing long-term harm that outweighs the short-term benefit of instant obedience.</p>
<p>The psychologist, Elizabeth Gershoff, found links between spanking and 10 negative behaviors or experiences, including aggression, anti-social behavior and mental health problems. The one positive result of spanking that she identified was quick compliance with parental demands.</p>