Related Experiment Video
Updated: Feb 2, 2026
08:43
Boldness, Aggression, and Shoaling Assays for Zebrafish Behavioral Syndromes
Published on: August 29, 2016
11.0K
Normative Trends in Physically Aggressive Behavior: Age-Aggression Curves from 6 to 24 Months
Michael F Lorber1, Tamara Del Vecchio2, Amy M S Slep1
1Department of Cariology and Comprehensive Care, New York University, New York, NY.
The Journal of Pediatrics
|November 16, 2018
Summary
Physically aggressive behaviors are common in children under two years old. While most forms increase with age, some, like hair pulling, decrease, offering insights for pediatric guidance.
Area of Science:
- Child Psychology
- Developmental Pediatrics
- Behavioral Science
Background:
- Physically aggressive behaviors are observed in young children.
- Understanding age-related trends is crucial for early intervention and parental guidance.
Purpose of the Study:
- To investigate age-related trends in physically aggressive behaviors in children aged 6 to 24 months.
- To identify specific behaviors that increase or decrease with age in this developmental period.
Main Methods:
- A normative US sample of 477 mothers reported on the frequency of 9 physically aggressive child behaviors.
- Data were analyzed using 2-part regression models to assess age-related trends.
Main Results:
- Nearly all children (94%) exhibited physical aggression in the past month.
- Kicking, pushing, and swiping prevalences increased with age.
- Hair pulling prevalence decreased with age, while hitting and throwing showed a more complex pattern, increasing then decreasing.
Conclusions:
- Physically aggressive behavior is nearly ubiquitous in 6- to 24-month-olds.
- Most forms of physical aggression increase with age during this period.
- Findings can inform pediatricians in counseling parents about child behavior.
Related Concept Videos
01:47Aggression
30.4K
Humans engage in aggression when they seek to cause harm or pain to another person. Aggression takes two forms depending on one’s motives: hostile or instrumental. Hostile aggression is motivated by feelings of anger with intent to cause pain; a fight in a bar with a stranger is an example of hostile aggression. In contrast, instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain (Berkowitz, 1993); a contract killer who murders for...
30.4K
01:21Secondary Motives: Affiliation Motivation and Aggression Motivation
700
Affiliation motivation is the intrinsic desire to connect with others and belong to a social group, which plays a crucial role in forming and maintaining personal relationships. This type of motivation is essential for psychological well-being, as it provides individuals with a sense of community and support. An example of this is a student who joins a study group in order to feel a sense of connection. People with high affiliation motivation actively seek social approval, take satisfaction in...
700
01:28Current Trends in Nursing I
5.5K
Current trends in nursing include:
5.5K
01:30Current Trends in Nursing II
3.5K
Trends in nursing are multifactorial and associated with changes in society, within the nursing profession, and in other professions. Notably, telehealth and remote nursing contribute to successful healthcare delivery for numerous patients and help reduce stress for nurses due to nursing shortages. Nurses can reach patients, monitor their conditions, and interact with them using computers, audio, visual accessories, and telephones—for example, remote patient monitoring systems. Likewise,...
3.5K
02:44Heating and Cooling Curves
27.8K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
27.8K
02:57Physical and Chemical Properties of Matter
166.4K
The characteristics that enable us to distinguish one substance from another are called properties.
166.4K