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Related Concept Videos

Conduct Disorder01:28

Conduct Disorder

Conduct disorder is a complex mental health diagnosis characterized by a repetitive and persistent pattern of behavior that violates societal norms, the rights of others, or age-appropriate rules. The diagnostic criteria for conduct disorder require the presence of at least three problematic behaviors within the past 12 months, with at least one occurring in the past six months. These behaviors are grouped into four categories: aggression toward people and animals; destruction of property;...
Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Halo Effect01:27

Halo Effect

The halo effect is a cognitive bias in which an individual's overall impression influences judgments about their specific traits. This psychological phenomenon leads people to associate positive characteristics with those they perceive as generally good and negative characteristics with those they view as bad. This effect is particularly influential in social perception, professional evaluations, and decision-making processes.The Psychological Basis of the Halo EffectThe halo effect is rooted...
Theory of Attribution II: Kelley's Covariation Theory01:29

Theory of Attribution II: Kelley's Covariation Theory

Attribution theory plays a crucial role in social psychology, helping to explain how individuals interpret the causes of behavior. One prominent model within this field is Harold Kelley's covariation theory, which provides a systematic approach to determining whether internal traits or external circumstances drive a person's actions. The model posits that individuals rely on three key types of information—consensus, consistency, and distinctiveness—to make these judgments.Consensus: Comparing...
Bullying02:04

Bullying

A modern form of aggression is bullying. As you learn in your study of child development, socializing and playing with other children is beneficial for children’s psychological development. However, as you may have experienced as a child, not all play behavior has positive outcomes. Some children are aggressive and want to play roughly. Other children are selfish and do not want to share toys. One form of negative social interactions among children that has become a national concern is bullying.
Parenting Styles01:27

Parenting Styles

Diana Baumrind's four parenting styles — authoritarian, authoritative, neglectful, and permissive — each influence children's socio-emotional development differently.
Authoritarian Parenting
This style is strict and controlling, with little room for open dialogue. Authoritarian parents demand obedience and often enforce rules with minimal warmth. Children raised this way may lack social skills and initiative, usually comparing themselves to others unfavorably.
Authoritative Parenting
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Related Experiment Video

Updated: Jun 13, 2026

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

Published on: September 11, 2021

Lead and conduct problems: a meta-analysis.

David K Marcus1, Jessica J Fulton, Erin J Clarke

  • 1Department of Psychology, University of Southern Mississippi, 118 College Drive, Hattiesburg, MS 39406, USA. david.marcus@usm.edu

Journal of Clinical Child and Adolescent Psychology : the Official Journal for the Society of Clinical Child and Adolescent Psychology, American Psychological Association, Division 53
|April 15, 2010
PubMed
Summary
This summary is machine-generated.

Lead exposure is linked to conduct problems in children and adolescents, with a medium effect size. Hair element analysis showed a stronger association than other exposure measurement methods.

Related Experiment Videos

Last Updated: Jun 13, 2026

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

Published on: September 11, 2021

Area of Science:

  • Environmental Health
  • Developmental Psychology
  • Neuroscience

Background:

  • Conduct problems in youth are a significant public health concern.
  • Environmental toxins, such as lead, are suspected contributors to behavioral issues.
  • Previous research indicates a potential link between lead exposure and adverse neurodevelopmental outcomes.

Purpose of the Study:

  • To meta-analyze the association between lead exposure and conduct problems in children and adolescents.
  • To compare the effect sizes based on different methods of lead exposure assessment.
  • To investigate the moderating role of participant age.

Main Methods:

  • A systematic literature search identified 19 studies.
  • Data from 8,561 children and adolescents were included in the meta-analysis.
  • Lead exposure was assessed using various methods including blood, tooth, bone, and hair element analysis.

Main Results:

  • A medium, statistically significant effect size (r = .19, p < .001) was found for the association between lead exposure and conduct problems.
  • Studies using hair element analysis reported larger effect sizes compared to blood, tooth, or bone lead levels.
  • Excluding hair analysis studies, the effect size remained significant (r = .15, p < .001).
  • Participant age did not significantly moderate the observed relationship.

Conclusions:

  • Lead exposure is associated with an increased risk of conduct problems in youth.
  • The method of lead exposure assessment influences the estimated effect size.
  • The magnitude of this association is comparable to that of lead exposure and decreased IQ.