The immediate intervention group will take part in the online parent training program called the Parent Web (PW), with pre and post testing (before and after intervention).

This is a group of parents who are in a wait-list control group and will receive the Parent Web, after pre and post testing.

Parent-Web (PW) is internet delivered and rooted in social learning and coercion theory, PW supports parenting practices and parent-child interactions encouraging prosocial behavior and emotion regulation, reduce coercive parenting, improve communication, problem solving, and warmth. PW has a universal and selective edition. Universal PW has 5 basic modules (1 module per week, 6-8 weeks) and bonus modules. Basic modules contain information, exercises, and videos of actors showing parenting practices. A family guide supports parents through modules.

Change from baseline up to 10 months later (immediate intervention group, two time points) and up to 20 months later (wait-list comparison group, three time points) in parent rating of their child's emotional problems, conduct problems, hyperactivity, peer problems and prosocial behavior as indexed by the Strengths and Difficulties Questionnaire (SDQ).

The SDQ consists of 25 items rated on a 3-point Likert scale with response options that range from 0 = not true, 1 = somewhat true, 2 = certainly true. Higher scores indicate a worse outcome on the emotional problems, conduct problems, hyperactivity, peer problems scale scores. Higher scores on the prosocial behavior scale indicate a better outcome.

Change from baseline up to 10 months later (immediate intervention group, two time points) and up to 20 months later (wait-list comparison group, three time points) in parent view of their child's behavioral problems/defiant behavior as measured by the Oppositional Defiant Scale of the Disruptive Disorder Rating Scale (DBD) which consists of 7 items rated on a 4-point scale ranging from 1 (not at all) to 4 (very much). Higher scores indicate a worse outcome.

Change from baseline up to 10 months later (immediate intervention group, two time points) and up to 20 months later (wait-list comparison group, three time points) in parent rated warmth and conflict. Warmth and conflict are indexed by eight items rated on a five-point scale from 1 (never) to 5 (more than 7 times). Five items measure parent-child warmth and three items measure parent-child conflicts. Higher scores on parental warmth scale indicate a better outcome. Higher scores on the parent-child conflicts scale score indicate a worse outcome.

Change from baseline up to 10 months later (immediate intervention group, two time points) and up to 20 months later (wait-list comparison group, three time points) in parent rated encouragement of positive behaviors, setting limits, and proactive parenting behaviors as indexed by the Parenting Children and Adolescents Scale (PARCA). The PARCA has 19 items rated on a five-point scale 1 = never to 5 = Very Often. The scale has three subscales on encouragement of positive behaviors, setting limits, and proactive parenting behaviors. Higher scores indicate a better outcome.