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NCT Number: NCT06880640

Affect-based Impulsivity in Borderline Personality Disorder

The purpose of this research study is to investigate how personality traits and neuroendocrine systems relate to decision-making patterns in individuals 18-45 years old. The main question it aims to answer is how neuroendocrine activity impacts decision-making.

Participants will complete online behavioral tasks, a stress induction procedure, self-report surveys, and a cognitive assessment. During the session, psychophysiological measures will be collected, including electrocardiogram (ECG) and cardiac impedance (ICG) to monitor heart rate and blood flow, as well as electrodermal activity (EDA), blood drop samples, and saliva collection to assess nervous system activity.

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Key information

Age range

18 year–45 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of North Carolina at Chapel Hill

Chapel Hill, North Carolina, 27514, United States

Location status: Recruiting

Location contact

Keely A Muscatell, PhD

CONTACT

[email protected]

919-843-9113

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Borderline Personality Disorder (BPD) group:

  • Score of 38 or higher on Personality Assessment Inventory-Borderline Scale (PAI-BOR)
  • Participants in the BPD group will be primarily recruited from the two

DEPENd lab studies that maintain large samples of BPD participants. To ensure maximal similarity between BPD participants recruited from other DEPENd lab studies and BPD participants recruited through other recruitment sources, the investigators will use the same criteria for the BPD group in the current study as the criteria used in the other DEPENd lab studies. BPD participants in the two DEPENd lab studies from which the investigators will be recruiting must meet the following criteria:

  • 3+ BPD symptoms, one of which must be affective instability, per clinical interview
  • Participants must score at least 80 on the Reynolds Intellectual Screening Test (RIST).

Health Control (HC) Group:

  • Score of 12 or lower on PAI-BOR
  • Score below 50th percentile on World Health Organization Disability Assessment Schedule (WHODAS)
  • Absence of any current or lifetime psychiatric disorder, including personality disorders as determined by diagnostic interviews (SIDP and SCID), if the participant had participated in the lab's other studies (IRB Nos. 20-1735 and 21-0602).

Combined Inclusion Criteria:

  • Ages 18-45
  • Provision of signed and dated informed consent form
  • Stated willingness to comply with all study procedures and lifestyle considerations and availability for the duration of the study
  • Willingness to participate in all components of the study
  • Participants must be able to speak, understand and read English.
  • Participants must have at least 20/40 visual acuity (correct or uncorrected).

Exclusion criteria

  • Use of as needed antihypertensive agents within 12 hours prior to lab visit
  • Inability to refrain from using as needed psychotropic medications for 12 hours prior to lab visit
  • History of psychotic disorder, Bipolar I disorder, autism spectrum disorder, reactive attachment disorder, pervasive developmental disorder, motor disorder, head injury, mental retardation, neurological disorder, or current substance dependence
  • Family history of Bipolar I disorder in a first degree relative.
  • Participants are also excluded for any of the following: cardiac pacemaker, aneurysm clip, cochlear implants, pregnancy, shrapnel, history of metal fragments in eyes, neurostimulators, weight of 250 lbs. or more, or claustrophobia.

Treatment and study plan

Stress Induction

Behavioral

Participants will complete the Trier Social Stress Test to induce stress, which includes a public speaking simulation and mental arithmetic.

Other names: Trier Social Stress Test (TSST)

Primary outcomes

  1. Goal-directed decision-making in the Social Decision Tree Task (SDTT)

    Time frame: Collected for 40 minutes ~2 hours into one-time study visit

    Measured by choice behavior in SDTT, which is based on the decision tree framework. After each action, participants receive feedback about the effect of that action and the extent to which it added to or took away from their points. If participants make a given choice, the subsequent actions that they can choose are different than if they were to initially make a different choice.

    An action in SDTT is goal-directed if the possible net gain an individual can earn before the end of the current epoch (a "day" in the SDTT) is equal to or higher than the amount they could gain by choosing the alternative action. The investigators will subset trials so that 1 is coded as choosing the immediately valuable action at the expense of the optimal and 0 is coded as choosing the optimal at the expense of the immediately valuable action. This outcome variable is binary.

Secondary outcomes

  1. Bias toward social actions in the Social Decision Tree Task (SDTT)

    Time frame: Collected for 40 minutes ~2 hours into one-time study visit

    Measured by choice behavior in SDTT, which is based on the decision tree framework. An action in SDTT is defined as social if it is paired with a visual cue with a face on it and non-social if not. This outcome variable is binary.

Other outcomes

  1. Change in salivary cortisol

    Time frame: Collected shortly after the participant consents into the study (~20 minutes into the one-time study visit) and 20 minutes after stress induction concludes (~2 hours into one-time study visit)

    The investigators will collect a saliva sample to measure baseline salivary cortisol at the beginning of the session. They will collect a second saliva sample 10 minutes after the stress induction concludes. They will measure cortisol levels in both samples through an assay. The investigators will calculate the change in salivary cortisol by subtracting the measured cortisol in the first saliva sample (collected at baseline) from the measured cortisol in the second saliva sample (collected 10 minutes after the stress induction). Salivary cortisol is measured as nmol/L. Salivary cortisol expected to generally be below 200 nmol/L.

Study contacts

Contact information is provided by the study sponsor or research team.

Keely A Muscatell, PhD

CONTACT

[email protected]

+1 (919) 843-9113

Sponsors and collaborators

Lead sponsor

University of North Carolina, Chapel Hill

Other

Collaborators

  • North Carolina Translational and Clinical Sciences Institute

Registry information

Official study title

Affect-based Impulsivity in Borderline Personality Disorder: Developing a Neurocomputational Phenotype

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Mar 18, 2025
Registry last updated
Jun 26, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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