Background: Borderline personality disorder (BPD) is a severe psychological condition characterized by emotional, interpersonal and self-image instability in addition to impulsive behaviour. Although there have been several explanatory models and psychotherapy approaches that have been designed to comprehend and intervene on BPD, most seem not to recognize idiosyncratic cognitive conflict as an important feature on this disorder. Adding personal dilemmas, such as those conceptualized in personal construct theory, as a key element to BPD's explanatory model could provide a better picture to understand this disorder and possibly to enhance effectiveness of current psychotherapy approaches. Despite the fact that constructivist explanatory models have been used and tested in several clinical populations, there is little work done studying the relevance of inner conflicts in BPD. According to the prototypical symptomatology manifested by these patients, psychological instability can be assumed as a transversal feature present in this disorder; therefore, a larger amount of cognitive conflict can be expected in BPD patients.

Method and Analysis: In order to test this assumption, this study aims to examine the characteristics of the interpersonal cognitive system of patients diagnosed with BPD and note their potential differences with the general population using the repertory grid technique, a complex assessment tool derived from personal construct theory. Statistical analyses will be performed to examine whether the clinical sample tends to present with more cases and with higher number of cognitive conflicts than the control group. Likewise, the association between cognitive conflict and symptom severity will be explored. Results will be a first step to determine if cognitive conflicts have an important role in the explanation of BPD. This will also help to value the convenience to further investigate the efficacy of conflict resolution psychotherapy interventions with these patients. This research work is undertaken in the context of a funded predoctoral research program.

Out of all personality disorders, BPD is one of the most life-threatening and psychological distressful due the symptomatic manifestation of impulsive behavior along with emotional, interpersonal and self-image instability. Suicidality and Non-Suicidal Self-Injury (NSSI) rates in this population are extremely high, and worrying for the families and mental health professionals. Over the last decades, BPD has obtained broad attention and many psychological treatments have been proposed to deal with its main symptoms. Although some treatments have been proven to be empirically effective in some domains, clearly not all experienced symptoms are successfully targeted, and some cases seem not to be helped even when treated by the more efficacious approaches. Perhaps, the explanatory models from which these psychotherapies emerge could have underestimated important aspects such as personal dilemmas.

Cognitive conflict has been defined and conceptualized by different psychological orientations, but only a few have included this phenomenon as an influential factor in the understanding of the origin and nature of psychological disorders and their psychotherapy proposals. Those that have considered inner conflicts have mainly focused on theoretical based dilemmas the academics would perceive relevant or common instead of exploring potential ideographic conflicts patients may have.

Being a disorder that is noticeably characterized by identity disturbances, finding relevant unresolved cognitive conflicts regarding self and others in these patients is expected. Addressing these issues could be potentially useful to further develop an explanatory model for this disorder as well as to increase therapeutic resources to help with these unattended potential necessities.

The central aim of this research is to assess cognitive conflicts in BPD diagnosed individuals to determine their role in the explanatory model of this disorder. These findings would permit the consideration of adapting a dilemma-focused intervention module which could complement existing treatments for these patients. In addition, exploring other characteristics of self-construction and the construction of others that are assessed with the RGT would be of interest. The specific objectives of this study are:

1. To test the hypothesis that patients with BPD present more cognitive conflicts (i.e., implicative dilemmas and dilemmatic constructs) than a general population sample.
2. To explore the content of cognitive conflicts in patients with BPD.
3. To examine whether presence and/or frequency of cognitive conflicts is associated with severity of emotional symptoms in BPD patients.
4. To explore whether the presence and number of cognitive conflicts has any capacity to predict treatment outcome.
5. To examine the relevance of other aspects of the construction of the self and others to explain the psychological functioning of patients with a BPD diagnosis.

The hypothesis of this study are:

1. The percentage of participants with implicative dilemmas and/or dilemmatic constructs will be superior in the group of patients diagnosed with BPD compared to a control group (community sample).
2. The number of implicative dilemmas and/or dilemmatic constructs will be higher in the BPD group than in the control group.
3. Presence and higher number of cognitive conflicts will be associated with greater levels of general clinical symptomatology (such as depression, anxiety, etc.).
4. Presence and higher number of individual cognitive conflicts will predict poor treatment outcome one year after the initial assessment.

For exploratory purposes, the content of implicative dilemmas and dilemmatic constructs will be studied, as well as the differences with the control group regarding self-construction measures (self-ideal discrepancy, self-others discrepancy, ideal-others discrepancy) and other characteristics of the construction system (interpersonal cognitive differentiation and polarization) and its association with other clinical and sociodemographic variables.

INCLUSION CRITERIA

• Aged between 18 and 60 years old.
• Having been diagnosed with BPD by a well-trained professional according to DSM-5 criteria.

EXCLUSION CRITERIA

• Having been diagnosed with bipolar disorder, psychotic disorder, prevalent continued and active substance abuse, disabling physical illness, organic cerebral dysfunctions or mental developmental severe difficulties.
• Not able to communicate either in Spanish or Catalan.
• Presence of other comorbid conditions such as other personality disorders, anxiety disorders, eating disorders, depression or non-disabling physical illness, will not be an exclusion motive, but will be recorded for statistical control purposes.

Study Population: The borderline personality group will be formed by participants diagnosed with BPD that receive treatment from outpatient or inpatient public and private mental health facilities in the local area of Barcelona, Spain (CSMA Benito Menni, ITA - especialistas en salud mental and ITLímit).

The control group will be formed by healthy volunteers of a student sample from the University of Barcelona and a nonstudent community sample who were not receiving psychotherapy when evaluated. These participants will be matched by age, gender and educational level with the clinical sample.