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. 2016 Nov;46(15):3137-3149.
doi: 10.1017/S0033291716001677. Epub 2016 Aug 30.

Delay Discounting and Response Disinhibition Under Acute Experimental Stress in Women With Borderline Personality Disorder and Adult Attention Deficit Hyperactivity Disorder

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Delay Discounting and Response Disinhibition Under Acute Experimental Stress in Women With Borderline Personality Disorder and Adult Attention Deficit Hyperactivity Disorder

A Krause-Utz et al. Psychol Med. .

Abstract

Background: Impulsivity is a core feature of borderline personality disorder (BPD) and attention deficit hyperactivity disorder (ADHD). In BPD, impulsive behavior primarily occurs under acute stress; impulse control deficits under non-stress conditions may be partly related to co-morbid ADHD. We aimed to investigate whether acute experimental stress has an impact on self-reported impulsivity, response inhibition (action withholding, action cancelation) and delay discounting in BPD compared to ADHD.

Method: Thirty female BPD patients, 28 female ADHD patients (excluding patients with co-morbid BPD and ADHD), and 30 female healthy controls (HC) completed self-reports and behavioral measures of impulsivity (IMT, assessing action withholding; GoStop, measuring action cancelation, Delay Discounting Task) under baseline conditions and after an experimental stress induction (Mannheim Multicomponent Stress Test).

Results: Both patient groups reported higher impulsivity than HC, ADHD reported higher trait impulsivity than BPD. On the IMT, ADHD showed significant action-withholding deficits under both conditions, while BPD performed significantly worse than HC under stress. In BPD but not ADHD and HC, action-withholding deficits (IMT) were significantly increased under stress compared to baseline, while no group/stress effects were found for action cancelation (GoStop). Delay discounting was significantly more pronounced in BPD than in HC (no stress effect was found).

Conclusions: In BPD, behavioral deficits in action withholding (but not in action cancelation) appear to be influenced by acute experimental stress. Delay discounting seems to be a general feature of BPD, independent of co-morbid ADHD and acute stress, possibly underlying typical expressions of behavioral impulsivity in the disorder.

Keywords: Adult attention deficit hyperactivity disorder; borderline personality disorder; delay discounting; impulsivity; response inhibition; stress.

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