Answer: Permissive.
Explanation: Permissive behavior or attitude displays the quality of granting permission .This behavior understand the value of freedom and thus intend towards permitting.In this case more love and friendly nature is shown with few rules and regulation.
Permissive parenting technique is followed by parents of Walter because they believe in the freedom of Walter and want to Walter behave in the friendly manner than providing the consistent parental guidance. They do not expect a mature behavior from Walter.