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Behavior changes marked by withdrawal, substance use, or aggression

Definition [V] p070-11

Behavior changes may be evidenced through changes in mood, appearance, or hygiene; withdrawing or isolating from others; new or increased substance use; sudden aggressive, violent, or threatening behavior; changes in work or school attendance or performance; signs of depression or paranoia; or other uncharacteristic actions.

changes in mood, appearance, or hygiene; withdrawing or isolating from others; new or increased substance use; sudden aggressive, violent, or threatening behavior; changes in work or school attendance or performance; signs of depression or paranoia

p. 70 · NCIER Claim Map

cite page 70 Step 5: Gather Information to Assess for Risk

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APA

U.S. Secret Service National Threat Assessment Center. (2026). Preventing Targeted Workplace Violence: A U.S. Secret Service Guide to Behavioral Threat Assessment and Management (p. 70). Claim p070-11, NCIER Claim Map. https://www.ncier.org/research/claim-maps/workplace-violence-prevention/claims/p070-11

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U.S. Secret Service National Threat Assessment Center. (2026). Preventing Targeted Workplace Violence: A U.S. Secret Service Guide to Behavioral Threat Assessment and Management (p. 70). Claim p070-11, NCIER Claim Map. <a href="https://www.ncier.org/research/claim-maps/workplace-violence-prevention/claims/p070-11">https://www.ncier.org/research/claim-maps/workplace-violence-prevention/claims/p070-11</a>

Link to https://www.ncier.org/research/claim-maps/workplace-violence-prevention/claims/p070-11 from your own pages; it resolves to this claim and its highlighted source passage.

License: CC BY 4.0. Free to reuse with attribution: credit NCIER Claim Map and link to the claim.


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