Source study found
Story checked
Research finds sibling aggression to be common, though often dismissed as 'normal' (opens in a new tab)
medicalxpress.com · 2026-10-02
Short answer
Needs reviewStudy found.
We found the study, but the claim check did not finish.
Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.
Share this check
The story
Research finds sibling aggression to be common, though often dismissed as 'normal'
medicalxpress.com · 2026-10-02
The story’s checkable claims.
Read the original story (opens in a new tab)NewsLink checks it
We found the study behind this story.
We found the study, but couldn't compare the story to it: the study's evidence could not be profiled.
Open claim evidenceThe source study
Further Evaluation of Sibling Aggression among Elementary School Age Youth
Evidence layer
Claim by claim
The source study was found, but the study's evidence could not be profiled, so these claims couldn't be checked.
Reading mode
Scan verdicts. Open evidence only when needed.
Claim 1 of 9Not checkedSibling aggression takes many forms, like hitting, shoving, threatening or calling names, and it has been understudied because people think it is normal.View evidenceHide evidence
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 2 of 9Not checkedFite and co-authors published an investigation into sibling aggression in the Journal of Psychopathology and Behavioral Assessment, based on data from 290 elementary school children with siblings.View evidenceHide evidence
As stated290 children
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 3 of 9Not checkedThe researchers found roughly 1 in 6 children reported using or threatening physical force to dominate a sibling, while about 1 in 8 said they had threatened or bullied a sibling to get something.View evidenceHide evidence
As statedroughly 1 in 6; about 1 in 8
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 4 of 9Not checkedThe article says sibling aggression is much higher than peer aggression, according to a comparison the researchers made.View evidenceHide evidence
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 5 of 9Not checkedThe researchers classified sibling aggression into proactive aggression, which is unprovoked, and reactive aggression, which is retaliation after provocation.View evidenceHide evidence
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 6 of 9Not checkedReactive aggression was described as more common with siblings as well as peers, and the article says this may relate to emotion regulation and social acceptability of retaliation.View evidenceHide evidence
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 7 of 9Not checkedThe researchers said both proactive and reactive sibling aggression can have negative later-life outcomes: reactive aggression was linked to feeling bad afterward and to depression and anxiety symptoms, while proactive aggression was linked to delinquency, substance abuse, binge drinking, and risk-taking.View evidenceHide evidence
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 8 of 9Not checkedBoth subtypes of sibling aggression were linked to peer aggression six months later.View evidenceHide evidence
As statedsix months later
Not checked
The source study was found, but this claim couldn't be checked against it.
Claim 9 of 9Not checkedThe research team found no difference in reported instances of sibling aggression between boys and girls.View evidenceHide evidence
Not checked
The source study was found, but this claim couldn't be checked against it.
Method layer
NewsLink found the paper. Tessa takes you deeper.
NewsLink checks the story. Tessa is where you inspect the paper, authors, evidence, and research context.
Open the paper in Tessa
Further Evaluation of Sibling Aggression among Elementary School Age Youth
Journal of Psychopathology and Behavioral Assessment · 2026
Why this one
Confident
NewsLink found the paper. Tessa is where you inspect it deeply.
Papers considered
The selected paper, plus nearby candidates.
Crossref, Europe PMC, PubMed · 40 candidate papers
Further Evaluation of Sibling Aggression among Elementary School Age Youth
Journal of Psychopathology and Behavioral Assessment · 2026 · Crossref
Development of interoception: the critical role of maternal affective touch in early attachment.
2026 · Europe PMC
Youth Social Functioning and Externalizing Psychopathology in Relation to Attention Deficit Hyperactivity Disorder: A Network Analysis
Journal of Psychopathology and Behavioral Assessment · 2026 · Crossref
Toward a mechanistic understanding of LGBTQ-affirmative cognitive-behavioral therapy: Testing treatment mediators in a randomized controlled trial with young gay and bisexual men.
2026 · Europe PMC
Toward a Further Understanding of Intrapersonal Factors in Psychopathology Among Older Adults: A Psychometric Evaluation of the Intrapersonal Problems Rating Scales
Journal of Psychopathology and Behavioral Assessment · 2026 · Crossref
From the body to the mind: interoception and sense of agency as mechanisms of depression reduction in the Body-Mind Axial Awareness (BMAA).
2026 · Europe PMC
And 34 more candidates considered.