- Research article
- Open Access
Child maltreatment-related dissociation and its core mediation schemas in patients with borderline personality disorder
BMC Psychiatry volume 20, Article number: 405 (2020)
From a developmental and pathogenic perspective, child maltreatment is strongly linked to later dissociative symptoms, as ultimate forms of human response to chronic stress. The present study aimed to investigate the mediating role of early maladaptive schemas (EMSs) in the relationship between child maltreatment and dissociation among patients with borderline personality disorder (BPD).
In this cross-sectional study, a total of 152 BPD patients (men: 52%; women: 48%) with an average age of 29.64 years (standard deviation (SD) = 7.29, range = 18–47) were selected by systematic random sampling from the patients who referred to Baharan psychiatric hospital in Zahedan, Iran, with the sampling interval of 3. The Childhood Trauma Questionnaire-Short Form, Dissociative Experiences Scale, and Young Schema Questionnaire-Short Form 3 were used to assess the patients. Data were analyzed using SPSS v25 software, and the statistical significance level was set at p < 0.05.
four main findings were obtained from the present study: (1) Heterogeneity of the levels of dissociation (LOD) in BPD patients; (2) The predicting roles of emotional neglect (EN), vulnerability to harm, and defectiveness/shame schemas in the total DES scores; (3) The vague role of childhood sexual abuse (SA) in developing dissociative symptoms; and (4) The mediating role of the core schemas of vulnerability to harm (β = 0.28, 95% confidence interval (CI): 0.04, 0.61) and defectiveness/shame (β = 0.21, 95% CI: 0.008, 0.45) in the relationship between EN and dissociation.
Regarding the heterogeneity of LOD and its crucial role in the successful treatment of BPD patients, it is highly essential to evaluate the present-state dissociation of the patient during the diagnosis process and provide effective interventions to reduce it. The obtained results highlighted the potential role of schema therapy in reducing dissociative responses to emotional stimuli (based on EN), vulnerability to harm, and defectiveness/shame. Nevertheless, psychopathology of dissociation among BPD patients should be further investigated in depth.
Dissociation is a complex phenomenon with impacts on various areas, including memory, emotion, sensory perception, and cognition . People with this problem may experience either positive symptoms (i.e., intrusive symptoms) or negative symptoms (i.e., apparent losses) . Zanarini et al.  reported that dissociation scores in patients with borderline personality disorder (BPD) were higher compared to healthy and psychiatric controls. They presented three levels of dissociation (LOD), i.e., mild, moderate, and severe, and found these symptoms to be heterogeneous in origin. Some researchers, such as Liotti  and Meares , asserted that dissociation is a central factor in the development of trauma-related disorders. However, a recent meta-analysis of 2035 subjects  revealed that such a phenomenon occurs as an extreme form of experiential avoidance in BPD patients. In this regard, Korzekwa et al.  postulated that the severity of dissociation is typically correlated with the severity of child maltreatment and disruption of attachment. This assertion has been strongly supporting Janet’s ideas about early maltreatment and dissociation , arguing that caregivers with maltreating actions would negatively affect child’s attachment security, strategies for coping with stress, and the sense of self. This concept has further led to the development of the theory of Structural Dissociation of the Personality (SDP). SDP is characterized by the loss of integration between daily-life and defensive action systems, as a result of a continuous threat to bodily integrity and/or life . Both these findings and clinical observations have almost assumed that dissociation, as a part of BPD symptomatic manifestation, is a form of human response to extreme stress at different levels among the patients .
Many studies have proved the relationship between BPD and child maltreatment  since the first attempt by Judith Herman . The emotional abuse (EA) and emotional neglect (EN) experiences might cause gradual damage to beliefs about the self and develop maladaptive models of self, other, and self-in-relation to others. Accordingly, the investigation of internal cognitive processes as the mediating mechanism can help facilitate the recognition of EA- and EN-induced clinical symptoms . These underlying assumptions are known as “relational schemas” or “core beliefs” in cognitive literature . The schemas are the organized representations of subjects’ prior experiences that have impacted their perceptions, thoughts, and behavior . Young et al.  designed a specific questionnaire for the assessment of early maladaptive schemas (EMSs) and divided them into unconditional beliefs about the self and conditional beliefs. Based on the unconditional maladaptive schemas, a change in individual behavior can never alter the outcome since the person is always recognized as incompetent, unlovable, unworthy, and bad. By contrast, conditional schemas imply that an individual has a hope of changing the outcome, even temporary, through subjugation, self-sacrifice, emotional inhibition, and unrelenting standards. Since an individual with experiences of childhood-EN suffers higher levels of distress through developing salient EMSs, child maltreatment is expected (based on a developmental and pathogenic perspective) to be strongly linked to later dissociative symptoms as ultimate forms of human response to chronic stress [1, 11, 14].
Based on the above reasoning, it could be concluded that the correction of the dissociation concept and optimization of its treatment entails a deep understanding of the dissociation-related processes. Accordingly, the current study aims to investigate the mediating role of EMSs in the relationship between child maltreatment and dissociative symptoms among borderline patients.
In this cross-sectional study, 152 BPD patients (men: 52%; women: 48%) were selected from the patients who referred to Baharan psychiatric hospital in Zahedan, Iran, via the systematic random sampling method with the sampling interval of 3. The average age of patients was 29.64 years (standard deviation (SD) = 7.29, range = 18–47) (see Table 1). The specified inclusion criteria were as follows: (1) Patients with Borderline Personality Inventory (BPI) scores higher than 10 and a confirmed diagnosis of BPD through the Structured Clinical Interview for DSM-5 Personality Disorders (SCID-5-PD) ; (2) Aged 18–50; (3) Ability to read, write, and understand. Also, the exclusion criteria comprised the followings: (1) Serious physical illness; (2) Brain traumatic injury; (3) Comorbidity of bipolar disorder; (4) Comorbidity of schizophrenia and other psychotic disorders; (5) Epileptic disorders; (6) Intellectual disability; (7) incomplete questionnaire.
After obtaining the approval of the current research project from the Research Medical Center School of Zahedan University and the prior permission from the relevant Ethics Committee with IR.ZAUMS.REC.1397.451 code of ethics, the subjects were given the consent forms to sign. The study was performed in compliance with the declaration of Helsinki, i.e., subjects were told that their participation was optional and they could leave the study for any reason. After obtaining their consent, patients were given the Childhood Trauma Questionnaire-Short Form (CTQ-SF), Dissociative Experiences Scale (DES), and Young Schema Questionnaire-Short Form 3 (YSQ-S3). The questionnaires were anonymous to keep the personal information of the patients completely confidential.
A Persian version of BPI was used in screening for BPD, which involves a 53-item yes-or-no questionnaire concerning four factors, namely (1) identity diffusion, (2) primitive defense mechanisms, (3) impaired reality testing, and (4) fear of closeness. A cut-off score above 10 for 20 items of the questionnaire points out that the person is more likely to have BPD. According to the study conducted by Mohammadzadeh and Rezaei , the test-retest reliability coefficient of this questionnaire was 0.80, and the internal consistency reliability coefficients for Factors 1 to 4 were 0.63, 0.74, 0.66, and 0.62, respectively. Also, the Persian version of BPI exhibited acceptable convergent validity against the Borderline Personality Scale (r = 0.70). In this study, the Cronbach’s alpha coefficients for the BPI subscales were ranged from 0.75 to 0.88.
A confirmed diagnosis of BPD was performed through SCID-5-PD. The questionnaire was a semi-structured diagnostic interview to be used by clinicians and researchers to assess the 10 DSM-5 personality disorders across clusters A, B, and C as well as other specified personality disorders. Various research reports have validated the reliability of SCID-5-PD .
A Persian version of DES was utilized to evaluate dissociation symptoms. In this 28-item questionnaire, the respondents were asked to rate their experiences for each item on a scale of 0 to 100% (i.e., ranging from “never” to “always”). Total scores were calculated by averaging the 28 item scores. Also, there are three LODs, namely mild (DES scores < 10), moderate (DES scores = 10–29.9), and severe (DES scores ≥30). Sajadi et al.  demonstrated that the peritraumatic and persistent DESs have excellent homogeneity (Cronbach’s alpha = 0.87 and 0.91, respectively) and very high consistency over time (intraclass correlation coefficient = 0.87). Also, the correlation coefficient between peritraumatic and persistent DES scores was 0.81. Moreover, the Pearson correlation analysis revealed a significant positive correlation between DES (peritraumatic and persistent) and posttraumatic stress disorder (PTSD) scores at the level of 0.05 (r = 0.38 and 0.55, respectively). In this study, the Cronbach’s alpha coefficient for the total scale was 0.90.
Participants’ EMSs were measured using a Persian version of the YSQ-S3 questionnaire, including 90 items, each with a 6-point Likert scale (1 = entirely untrue of me, 6 = describes me perfectly). This instrument was designed by Young to assess 18 schemas, including abandonment, social isolation/alienation, pessimism, emotional inhibition, dependence, approval/recognition-seeking, emotional deprivation, vulnerability to harm, enmeshment, subjugation, unrelenting standards, self-punitiveness, defectiveness/shame, mistrust/abuse, failure, self-sacrifice, entitlement, and insufficient self-control. Continuous variables for each schema were created by averaging the participants’ ratings over the assessment items. As each subscale consisted of 5 items, the score obtained on the subscales varied between 5 and 30. Yousefi and Shirbagi  indicated a high level of Cronbach’s alpha and split-half (86 and 91%, respectively) reliability coefficients of the YSQ-S3 and the extracted factors. Also, the convergent and discriminate validity of the YSQ-S3 was examined by some measurement tools in terms of psychological distress, positive and negative affect, self-confidence, cognitive vulnerability to depression, and personality disorder. The correlation results for the six former criteria were sequentially as follows: 37, 34, 40, 39, 35, and 36%, which were significant at p < 0.001. In this study, the Cronbach’s alpha coefficients for the YSQ-S3 subscales were ranged from 0.67 to 0.92.
A Persian version of CTQ-SF was employed for the measurement of child maltreatment, consisting of 28 items scored on a 5-point Likert scale. The questionnaire was developed to measure five subtypes of child maltreatment, namely EA, physical abuse (PA), sexual abuse (SA), EN, and physical neglect (PN). According to the study of Garrusi and Nakhaee , the test-retest reliability coefficient of this questionnaire was 0.90, and the internal consistency reliability coefficients for the four subscales were 0.86, .0.85, 0.84, and 0.60, respectively, with a mean of 0.79. Also, the Persian version of CTQ-SF exhibited acceptable convergent validity against the 28-items General Health Questionnaire (r = 0.40). In this study, the Cronbach’s alpha coefficients for the CTQ-SF subscales were ranged from 0.75 to 0.90.
Descriptive statistical methods, including mean and standard deviation, were applied for data analysis. Pearson correlation coefficient, Spearman’s ρ, and point-biserial correlation coefficient were performed to assess the correlation between study variables. The mediating role of EMSs in the relationship between child maltreatment and dissociation was tested through the Hayes’ Process v3.3 macro in SPSS . As outlined in Preacher and Hayes , mediation emerges when the indirect effect is significant and the confidence intervals exclude zero. Data were analyzed using SPSS v25 software, and the statistical significance level was set at p < 0.05.
Figure 1(a) and Fig. 1(b) illustrate the LOD and distribution of mean DES scores among BPD patients, respectively. Based on Fig. 1(a), about 1.32% of the patients had a mild LOD, which was generally considered to be in the low range. About 63.16% of the patients had moderate LOD, which is commonly observed in a number of non-trauma-related psychiatric disorders such as feeding and eating disorders. The remaining 35.53% of the patients had severe LOD, which is frequently seen in patients with PTSD or dissociative disorders .
According to Table 2, dissociation was positively correlated with PA (r = 0.21, p < 0.01), EA (r = 0.31, p < 0.01), PN (r = 0.24, p < 0.01), EN (r = 0.52, p < 0.01), abandonment (r = 0.19, p < 0.01), pessimism (r = 0.34, p < 0.01), approval/recognition-seeking (r = 0.27, p < 0.01), vulnerability to harm (r = 0.59, p < 0.01), enmeshment (r = 0.18, p < 0.05), subjugation (r = 0.21, p < 0.01), unrelenting standards (r = 0.23, p < 0.01), self-punitiveness (r = 0.29, p < 0.01), defectiveness/shame (r = 0.57, p < 0.01), entitlement (r = 0.26, p < 0.01), and borderline personality symptomatology (BPS) (r = 0.37, p < 0.01). Moreover, LOD was positively correlated with PA (r = 0.18, p < 0.05), EA (r = 0.27, p < 0.01), EN (r = 0.36, p < 0.01), and BPS (r = 0.30, p < 0.01). Furthermore, EA was positively correlated with BPS (r = 0.19, p < 0.05). Significant correlation between gender and dissociation (r = 0.18, p < 0.05) and between level of education and dissociation (r = 0.17, p < 0.05) were seen.
Predictor variables of dissociation in BPD patients
Model summary of multiple regression analysis to evaluate the predictor variables of dissociation in BPD patients are presented in Table 3. As shown, EN, vulnerability to harm, and defectiveness/shame accounted for the predictor variables for a significant proportion of the variance in the total DES scores.
The mediation analysis was performed using Hayes’ process tool in SPSS (model = 4, bootstrap samples = 5000). As hypothesized, a significant indirect effect of EN was distinctly observed on dissociation through vulnerability to harm and defectiveness/shame (β = 0.28, 95% confidence interval (CI): 0.04, 0.61; β = 0.21, 95% CI: 0.008, 0.45, respectively). The mediators (i.e., vulnerability to harm and defectiveness/shame) could account for roughly 75% (PM = 0.75) and 56% (PM = 0.56) of the total effect of EN on dissociation, respectively. Hence, the overall hypothesis that vulnerability to harm and defectiveness/shame mediate the effect of EN on dissociation was supported (see Fig. 2).
The findings of the present study can be divided into four major parts. As the first part, 1.32% of BPD patients had a mild LOD, 63.16% had a moderate LOD, and 35.53% had a severe LOD, similar to that reported for patients with PTSD or dissociative disorders. These distributions are inconsistent with the results of the study performed by Zanarini et al. , wherein the LOD in BPD patients were 31.7, 42.1, and 26.2% for mild, moderate, and severe modes, respectively. Besides, the heterogeneity of the LOD (see Fig. 1(b)) was consistent with the results obtained by Zanarini et al.  and contradicted the findings of previous studies [22,23,24,25]. The earlier investigations as a whole demonstrated that the majority of BPD patients had a relatively high LOD that was not different from the LOD in patients with trauma-related disorders [22,23,24,25,26,27]. By contrast, the results of the present study and Zanarini et al.  showed that a large number of BPD patients had moderate LOD. This result regarding the heterogeneity of dissociative experiences might offer critical clinical implications. For instance, clinicians need to carefully evaluate the LOD in their BPD patients, instead of the assumption of severe LOD in all BPD patients . This individualized method can also be applied to the selection of both the pharmacologic intervention and psychotherapeutic strategy. Indeed, BPD patients with a mild to moderate LOD may not have the same needs and demands as what BPD patients with severe LOD have .
As the second main finding of the present study, EN was able to predict a significant proportion of the variance in the total DES scores. This finding was consistent with the results obtained by Watson et al. , Van Den Bosch et al. , Simeon et al. , and Sar et al. , who identified EN as a predictor of dissociation. These results supported the hypothesis that EN engenders dissociative symptoms later in life. In detail, Bowlby’s attachment theory suggests that children make internal working models of attachment figures, of the self, and of self-in-relation to others based on their relationship with primary caregivers . Thus, individuals who experienced EN may build maladaptive models of self, other, and self-in-relation to others by undermining beliefs about the self (an example for EN: “I am not entitled to anyone’s attention”) . These maladaptive interpersonal expectations can lead to later adaptation (i.e., dissociative symptoms) by creating psychological distress .
As the third main finding of the present study, there was no association between SA and dissociative symptomatology among BPD patients. This result was consistent with findings by Zweig-Frank et al. [23, 24], Watson et al. , Simeon et al. , and Sar et al. , whereas it was inconsistent with the results obtained by Shearer , Brodsky et al. , and Van Den Bosch et al. , who announced childhood SA was a risk factor for dissociative symptomatology. However, further investigations are needed to reconcile these contradictory findings.
The fourth main result of the present study was that the vulnerability to harm and defectiveness/shame schemas played a mediating role in the relationship between EN and dissociation. This finding supported the role of dissociation in BPD proposed by Young et al.  and the key roles of EN and vulnerability to harm and defectiveness/shame in developing dissociative symptoms . In other words, defectiveness/shame is an aversive affective experience caused by a very negative self-evaluation . Individuals experiencing defectiveness/shame schemas often tend to hide the fact, whereas they attempt to push away the memories of childhood abuse through dissociation. However, dissociation by hiding the emotional and cognitive processes of traumatic experiences can disrupt the individual’s ability to recover from such sufferings [34, 35]. Additionally, in this study, the core schema of vulnerability to harm was identified as an unconditional maladaptive schema. This schema represents the importance of fear and helplessness as a lasting consequence of EN since the individual fails to prevent catastrophes and fears to re-experience them over and over in life. Having such beliefs and expectancy in life may further provoke a person to feel helpless and anxious and gradually develop more pervasive negative cognitive styles . Children experiencing EN in stressful situations may not show their stress in future events to prevent emotional arousal in themselves. This mechanism may be enduring and encourage dissociation (i.e., a stress response) in children as a path for insulation against frightening or helplessness experiences. However, this behavioral practice in children may gradually lead them to use ineffective coping strategies . These findings concerning the development of dissociation may have important clinical implications. For instance, dissociation prevents individuals from learning and reduces the effectiveness of learning-based therapies (e.g., dialectical behavior therapy) by inducing a disintegration of perception, consciousness, identity, and memory in individuals. Since both basic learning processes and classical conditioning follow a similar mechanism, the presence of any dissociative symptom in an individual prevents the person from acquiring any differential conditioning response. Therefore, based on the obtained results, schema therapy as a third-wave treatment may be effective in reducing dissociative responses to emotional stimuli (based on EN), vulnerability to harm, and defectiveness/shame. This therapy has aimed to reorganize these inner structures in BPD patients through four core mechanisms of change, including (a) limited reparenting, (b) experiential imagery and dialogue work, (c) cognitive restructuring and education, and (d) behavioral pattern-breaking .
The present study has suffered some limitations. First, the ability to generalize the findings to different cases has not been practical due to the small sample size and the selection of participants from one geographical area. Second, cross-sectional studies mostly fail to specify a definite reason behind a correlation. In detail, this limitation can prevent a deep understanding of the nature of the causal relationship between BPS and dissociation. The use of self-report measures is the third limitation since the obtained information may only reflect the feelings of patients during the assessment and not reveal the real emotions they have suffered. Thus, it is recommended that future studies focus on methodological limitations, including sole reliance on self-report measures due to the memory bias and demand characteristics, lack of empirical data, and the absence of ethnic differences.
Despite these limitations, the investigation could improve better comprehension of the potential mechanisms whereby abusive childhood experiences might impact the functioning of BPD patients. It is probably very imperative to understand these internalized representations for developing personality-targeted interventions and preventive approaches among victims of child maltreatment.
In summary, four main findings emerge from the present study: (1) Heterogeneity of the LOD in BPD patients; (2) The predicting roles of EN, BPS, vulnerability to harm, and defectiveness/shame schemas in the total DES scores; (3) The vague role of childhood SA in developing dissociative symptoms; and (4) The mediating role of vulnerability to harm and defectiveness/shame schemas in the relationship between EN and dissociation. These findings have highlighted the importance of early interventions for the individuals who have developed internal working models of the self as worthless, others as abusive, or the world as threatening. Given the heterogeneous nature of LOD and its vital role in the success of treating BPD patients, it is critically needed to assess the present-state dissociation of the patient during the diagnosis and facilitate practical interventions to decrease it. The obtained results revealed the influential role of schema therapy in diminishing dissociative responses to emotional stimuli (based on EN), vulnerability to harm, and defectiveness/shame. Nevertheless, psychopathology of dissociation among BPD patients should be further investigated in depth.
Availability of data and materials
The datasets generated and analyzed during the current study are not publicly available because no consent for making the data publicly available was collected from the participants. However, the data are available from the corresponding author on reasonable request.
Borderline personality disorder
Borderline Personality Inventory
Borderline personality symptomatology
Childhood Trauma Questionnaire-Short Form
Dissociative Experiences Scale
Early maladaptive schemas
Levels of dissociation
Posttraumatic stress disorder
Structured Clinical Interview for DSM-5 Personality Disorders
Young Schema Questionnaire-Short Form 3
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The author hereby thanks the patients, who aided in conducting the present study.
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The study was approved by the ethics committee of the Medical Faculty of the ZAUMS Zahedan (IR.ZAUMS.REC.1397.451) and all procedures were in accordance with the latest version of the Declaration of Helsinki. Prior to participation, written informed consent was obtained from all participants and their parents/legal guardians after a comprehensive explanation of the study procedures.
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Khosravi, M. Child maltreatment-related dissociation and its core mediation schemas in patients with borderline personality disorder. BMC Psychiatry 20, 405 (2020). https://doi.org/10.1186/s12888-020-02797-5
- Borderline personality disorder
- Schema therapy
- Child maltreatment