School Bullying: Consequences and CBT Protocol

School bullying leaves marks that adults systematically underestimate. Not just during the school years -- long after. The psychological consequences settle deeply: entrenched negative beliefs, social hypervigilance, avoidance, sometimes a genuine post-traumatic stress syndrome. And yet, most bullied children and adolescents never receive structured psychological care.

As a CBT psychopractitioner in Nantes, I see children in full crisis, adolescents refusing to return to school, but also adults in their 30s or 40s who still carry the scars of what they experienced at 12. School bullying is not a "bad childhood memory." It is a repetitive interpersonal trauma whose effects, without intervention, can last decades.

This article presents the documented psychological consequences of school bullying, then details the CBT protocol I use in practice -- step by step. No cookie-cutter recipes. A rigorous clinical framework, adapted to children, adolescents, and adults who still bear the aftermath.

Psychological Consequences: An Underestimated Clinical Picture

What Longitudinal Studies Show

The most solid research on school bullying consequences comes from longitudinal studies -- those that follow the same individuals over years. They paint a concerning picture.

The study by Copeland et al. (2013), conducted on 1,420 participants followed from childhood to adulthood, showed that bullying victims present in adulthood:

• A 4.3 times higher risk of generalized anxiety disorder


• A 2.7 times higher risk of depressive disorders


• A 4.8 times higher risk of agoraphobia


• A significantly elevated risk of panic disorder

The Finnish longitudinal study by Sourander et al. (2007), covering 5,000 participants, confirms these data and adds increased risk of somatoform disorders (chronic pain without identifiable medical cause) and suicidal behaviors.

The crucial point: these consequences persist even when bullying stopped years ago. The brain was "reprogrammed" by the repeated experience of social threat, and this programming does not self-correct.

The Six Main Consequences

1. Social Anxiety and Hypervigilance

This is the most frequent consequence. The bullied child learns -- rightly so, in their context -- that social interactions are dangerous. This alarm circuit persists well after the bullying ends.

Clinically, this manifests as:

• Constant surveillance of others' reactions (gaze, tone, micro-expressions)


• Systematic anticipation of rejection or aggression


• Social avoidance behaviors (refusing the cafeteria, group work, outings)


• Tendency to interpret neutral signals as threatening (laughter in the schoolyard = "they're laughing at me")

This hypervigilance is a survival mechanism that was adaptive during the bullying. The problem is it doesn't switch off when the danger disappears. This is exactly what we observe in PTSD: the alarm system remains stuck in the "on" position.

2. Fundamental Negative Beliefs

Beck's cognitive model (1979) describes cognitive schemas as lenses through which we interpret reality. Bullying installs profoundly negative schemas:

• About self: "I'm worthless," "There's something wrong with me," "I'm different from others and that's why I'm rejected"
• About others: "People are dangerous," "You can't trust anyone," "If I show weakness, people will exploit it"
• About the world: "The world is unfair and nobody can help me," "If you're kind, you get crushed"

These beliefs are all the more tenacious because they formed during childhood or adolescence -- a period when the brain is particularly plastic and identity is under construction. An adult who hears "you're worthless" can put it in perspective. A 10-year-old who hears it every day for two years integrates it as a fundamental truth about themselves. 3. Depression and Learned Helplessness

Seligman (1975) described the concept of learned helplessness: when an individual is repeatedly exposed to an aversive situation they can neither control nor escape, they eventually cease all attempts at action, even when the environment changes.

School bullying is an ideal breeding ground for learned helplessness:

• The child cannot leave school (it's mandatory)


• Adults often intervene poorly or not at all


• Defense attempts frequently fail (the bully changes strategy)


• The situation repeats day after day

The result: a deep feeling of "no matter what I do, it's useless." This feeling generalizes well beyond the school context and directly fuels depressive states.

4. Post-Bullying Syndrome: A Specific PTSD

The concept of "post-bullying syndrome" is not yet an official DSM-5 diagnosis, but it is increasingly discussed in the literature (Tehrani, 2012; Mikkelsen & Einarsen, 2002). Its manifestations largely overlap with PTSD:

• Re-experiencing: flashbacks of bullying scenes, repetitive nightmares
• Avoidance: avoidance of places, people, or situations reminiscent of the bullying
• Cognitive and emotional alterations: persistent negative beliefs, chronic negative emotions (shame, anger, fear), detachment from others
• Hyperarousal: sleep disturbances, irritability, startle responses, concentration difficulties

Ehlers and Clark (2000), in their cognitive PTSD model, explain that trauma is maintained when the event is stored in memory in a fragmented way and when the person develops negative interpretations of the event and its consequences. This is exactly what we observe after prolonged bullying. 5. Somatic Disorders

The body carries the traces of bullying. Studies show increased prevalence of:

• Chronic abdominal pain


• Tension headaches


• Sleep disorders


• Chronic fatigue


• Eating disorders (in both directions: restriction or compulsive eating)

These symptoms are not "in the head": chronic stress activates the hypothalamic-pituitary-adrenal (HPA) axis, alters cortisol levels, and causes real physiological effects. Therapeutic work must take this somatic dimension into account.

6. Impact on Future Relationships

This is perhaps the least visible but most disabling long-term consequence. The bullied child develops dysfunctional relational schemas:

• Submission: accepting unbalanced relationships out of fear of conflict or abandonment
• Mistrust: inability to trust, constantly testing partners or friends
• Isolation: giving up on relationships to avoid any possibility of suffering
• Reactive aggression: reacting disproportionately to the slightest sign of mockery or criticism

These schemas replay in friendships, romantic relationships, and professional settings, often without the person connecting them to the bullying they suffered years earlier.

The CBT Protocol: Structured Care

Why CBT Is the Reference Approach

Meta-analyses (Persson et al., 2017; Wolgast et al., 2019) confirm CBT's effectiveness for bullying-related disorders, with moderate to large effect sizes on anxiety, depression, and post-traumatic symptoms.

CBT is particularly suited to school bullying for several reasons:

• It directly targets the negative beliefs installed by bullying


• It is structured and time-limited (12-20 sessions generally)


• It is adaptable to the child's age (play-based techniques for younger children, more verbal work for adolescents)


• It includes a behavioral component (exposure) that allows reconnection with avoided situations

Phase 1: Assessment and Therapeutic Alliance (Sessions 1-3)

Session 1: Building Safety

With a bullied child or adolescent, the first session is decisive. This young patient has learned that social interactions are dangerous. Coming to see an unknown professional is already an act of courage.

First session objectives:

• Establish a secure framework (confidentiality, pacing, no pressure)


• Understand the current situation (is the bullying ongoing or has it ended?)


• Assess the distress level (age-appropriate scales: RCMAS for anxiety, CDI for depression)


• Identify the main symptoms

With children, I often use drawing or emotional cards to facilitate expression. With adolescents, I am direct: "What happened is not normal, it's not your fault, and we're going to work together to make things better."

Sessions 2-3: Mapping and Psychoeducation

Together we build the "map" of the disorder:

• Bullying chronology (onset, significant events, possible end)


• Identification of negative beliefs ("I'm worthless," "nobody likes me," "it's my fault")


• List of avoided situations


• Identification of somatic symptoms


• Parental involvement: explanation of the disorder, role they can play, what to avoid (minimizing, overprotecting, or "solving the problem" in the child's place)

Psychoeducation is essential: we explain to the child (in age-appropriate language) how the brain works when facing a repeated threat, why their alarm system is "stuck in the on position," and how CBT will help recalibrate it.

Phase 2: Cognitive Restructuring (Sessions 4-8)

This is the core work on negative beliefs. The goal is not to "think positive" -- that doesn't work and devalues the child's experience. The goal is to identify cognitive distortions and build more realistic, nuanced thoughts.

Identifying Automatic Thoughts

We teach the child to spot their automatic thoughts in social situations. Example:

• Situation: A group of students laughs in the schoolyard.
• Automatic thought: "They're making fun of me."
• Emotion: Fear, shame (8/10).
• Behavior: Leave the yard, isolate.

With younger children, I use the "thought detective" metaphor: we investigate together to find out whether the thought is a fact or an interpretation. Building Alternative Thoughts

We don't replace "everyone hates me" with "everyone loves me." We build a more balanced thought:

• Initial thought: "Everyone hates me."
• Restructured thought: "Some people mistreated me. Others didn't do anything to me. Hugo and Lina invited me to play last week."

Specific Work on the "It's My Fault" Belief

This belief deserves specific treatment because it is nearly universal among victims. We use the responsibility pie chart technique:

List all factors that contributed to the bullying (bully's behavior, group dynamics, adult inaction, school context, etc.)

Assign a percentage to each factor

Visually observe that the victim's "fault," if any, is minimal compared to all the other factors

Phase 3: Progressive Exposure (Sessions 8-14)

Avoidance is the mechanism that maintains fear. As long as the child avoids social situations, their brain continues coding them as dangerous. Progressive exposure aims to recode these situations as "manageable, even if uncomfortable."

Building the Exposure Hierarchy Example for a 14-year-old adolescent:

| Level | Situation | Anxiety (0-100) |
|-------|-----------|------------------|
| 1 | Sending a message to a supportive classmate | 20 |
| 2 | Eating in the cafeteria at a table with other students | 35 |
| 3 | Participating in a class without sitting in the last row | 45 |
| 4 | Speaking up in class to answer a question | 55 |
| 5 | Participating in group work | 60 |
| 6 | Going to the playground without staying near an adult | 70 |
| 7 | Inviting a classmate home | 75 |
| 8 | Handling a taunt or disagreement without fleeing | 85 |

A crucial point: exposure assumes the environment is reasonably safe. Exposing a child to a context where bullying continues is revictimization, not therapy.

Phase 4: Social Skills Training (Sessions 10-14)

Bullying often prevented normal social skill development. The child spent months or years in survival mode, not social learning mode.

Skills addressed:

• Assertiveness: saying no, expressing disagreement, setting boundaries without aggression
• Conflict management: distinguishing a normal disagreement from an attack, graduated response repertoire
• Reading social cues: recalibrating signal interpretation (a laugh is not necessarily mockery)
• Social initiation: starting a conversation, joining a group, suggesting an activity

Phase 5: Consolidation and Relapse Prevention (Sessions 14-16)

We prepare the child for future difficulties:

• Identification of personal warning signs (withdrawal, return of negative thoughts)


• Cognitive "emergency kit": cards with alternative thoughts developed in sessions


• Action plan if bullying resumes or new social difficulties arise


• Scheduled booster sessions at 1 month, 3 months, and 6 months

When Bullying Happened 20 Years Ago: Treating the Adult

I regularly see adults who consult for social anxiety, relationship difficulties, or low self-esteem -- and who, upon exploring, connect these difficulties to school bullying suffered years, sometimes decades ago.

The protocol is the same in its broad outlines, with some adaptations:

• Cognitive work focuses on more rigid beliefs because they are older


• Exposures target current social situations (not the school context)


• We explore how schemas installed by bullying replay in current relationships (couple, friendships, work)


• Grieving "what could have been" is sometimes part of the work: the lost adolescence, the friendships never experienced, the self-confidence never built

The good news: even when bullying dates back 20 or 30 years, negative beliefs can be restructured and avoidance reduced. The brain retains its plasticity. What was learned can be unlearned -- and replaced with something more accurate.

Key Takeaways

School bullying is not a phase of life you overcome by "toughening up." It is a repetitive interpersonal trauma that installs negative beliefs, avoidance patterns, and sometimes genuine post-traumatic syndrome. The consequences last well beyond school years if they are not addressed.

CBT offers a structured, research-validated framework for treating these consequences: restructuring negative beliefs, progressive exposure to avoided situations, social skills training, trauma desensitization. It is not easy work -- neither for the patient nor for the therapist. But it works.

If your child is being bullied or has been, don't underestimate the impact. And if you are an adult still carrying the traces of what you experienced at school, know that these traces are not a fate. It is never too late to restructure what was damaged.

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References

• Beck, A. T. (1979). Cognitive Therapy and the Emotional Disorders. Penguin Books.
• Copeland, W. E., Wolke, D., Angold, A., & Costello, E. J. (2013). Adult psychiatric outcomes of bullying and being bullied by peers in childhood and adolescence. JAMA Psychiatry, 70(4), 419-426.
• Ehlers, A., & Clark, D. M. (2000). A cognitive model of posttraumatic stress disorder. Behaviour Research and Therapy, 38(4), 319-345.
• Mikkelsen, E. G., & Einarsen, S. (2002). Basic assumptions and symptoms of post-traumatic stress among victims of bullying at work. European Journal of Work and Organizational Psychology, 11(1), 87-111.
• Seligman, M. E. P. (1975). Helplessness: On Depression, Development, and Death. W. H. Freeman.
• Sourander, A., Jensen, P., Ronning, J. A., et al. (2007). What is the early adulthood outcome of boys who bully or are bullied in childhood? Pediatrics, 120(2), 397-404.
• Tehrani, N. (2012). Workplace Bullying: Symptoms and Solutions. Routledge.