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  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Digital Tools for the Treatment of Borderline Personality Disorder: A Critical Review of Smartphone Applications</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Timothy I. Michaels</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Sonali Singal</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Emily Stone</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Laura Braider</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>John Kane</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>The Donald and Barbara Zucker School of Medicine</institution>
          ,
          <addr-line>500 Hofstra Blvd, Hempstead, NY, 11549</addr-line>
          ,
          <country country="US">USA</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>The Zucker Hillside Hospital</institution>
          ,
          <addr-line>75- 59 263</addr-line>
        </aff>
      </contrib-group>
      <abstract>
        <p>Digital tools provide an opportunity to increase access to and reduce costs of Dialectical Behavioral Therapy (DBT), the gold standard treatment for symptoms of Borderline Personality Disorder (BPD). Yet the integration of smartphone applications has been slow and fractured. This paper summarizes data on DBT digital intervention efficacy, and reviews the intelligent user interface (IUI) and user experience (UX) of four DBT-based smartphone applications. It concludes with suggestions for improved clinical-technology partnerships in order to address barriers to adoption, and presents considerations for expanding current offerings by leveraging passive monitoring, digital nudging and positive reinforcement.</p>
      </abstract>
      <kwd-group>
        <kwd>eol&gt;ecological momentary assessment (EMA)</kwd>
        <kwd>digital nudging</kwd>
        <kwd>just-in-time feedback</kwd>
        <kwd>dialectical behavioral therapy (DBT)</kwd>
        <kwd>suicide</kwd>
        <kwd>self-harm</kwd>
        <kwd>borderline personality disorder (BPD)</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Efficacy of</title>
    </sec>
    <sec id="sec-2">
      <title>Applications DBT</title>
    </sec>
    <sec id="sec-3">
      <title>Smartphone</title>
      <p>
        Borderline personality disorder (BPD) is a
mental health condition that is characterized by
a high level of disability, elevated suicide rates,
and frequent psychiatric emergency
hospitalizations (
        <xref ref-type="bibr" rid="ref1">1</xref>
        ). Dialectical Behavioral
Therapy (DBT) is an intensive, efficacious
therapy for the treatment of BPD, yet is
associated with high costs, limited availability,
and barriers to entry (
        <xref ref-type="bibr" rid="ref2">2</xref>
        ). Digital tools present
an opportunity to increase access to DBT given
increasing evidence for the efficacy and safety
of delivering psychotherapy through
smartphone applications (
        <xref ref-type="bibr" rid="ref3">3</xref>
        ). DBT may be
especially well-suited to translating clinical
components to digital formats, given the
intervention’s use of daily diary cards of
emotions and impulsive urges, on-call crisis
support, coping skills practice, and weekly
homework assignments. A recent meta-analysis
of 10 DBT-based apps that underwent
________________
randomized clinical trials (RCTs) (
        <xref ref-type="bibr" rid="ref4">4</xref>
        ) reported
an overall low risk of bias (Figure 1). There
were no significant differences between digital
interventions and in-person treatment
outcomes, yet some of the app-based
interventions had high attrition, incomplete.
This position paper reviews four DBT-based
smartphone applications (DBT Coach, DBT
Self-Help, DBT App, and Diary Card) that were
readily available for Android and iOS devices,
and free to download. Specifically, staff
reviewed each application to determine its
consistency with in-person components of DBT
treatment, its functionality, intelligent user
interface, and user experience. A fifth
DBTbased application (DBT Diary) met inclusion
criteria for review but was not included as staff
encounter numerous technical errors at sign-up.
      </p>
    </sec>
    <sec id="sec-4">
      <title>2. Functionality and User Interface</title>
      <p>All of the DBT apps included daily diary
cards, and most included skills practice and
digital libraries of self-help exercises (Diary
Card had neither). Both DBT Self Help and
DBT Coach enable users to create a digital
safety plan and utilize crisis services, however
the crisis features are hidden by an icon in DBT
Coach (Figure 2A) and are more prominent in
DBT Self Help (Figure 2B). The landing page
of DBT App (3C) indicates its limited features
(diary card and access to skills PDF), while the
calendar layout of Diary Card (3D) is
confusing and hard to read. All apps utilized
ecological momentary assessment for symptom
tracking; none of the apps utilized passive data
collection. The user interface of DBT Coach
and DBT Self-Help were intuitive although the
later included unnecessary ink. Diary Card
provided unnecessary animation that frustrated
end users and excluded important diary card
features (e.g. target behaviors). (graphs and a
calendar) that did not improve the interface and
not typical in DBT treatment.</p>
    </sec>
    <sec id="sec-5">
      <title>3. User Experience</title>
      <p>DBT Coach (Figure 3A) and DBT Self-help
(3B) including sliding scales which aided user
experience when completing diary cards. Only
DBT Coach include a tutorial of the app’s
features and had engaging animation when
transitioning between pages. The navigation
was logical in DBT App (3C) although there
were blank spaces between forms. Diary Card
(3D) excluded important diary card features
(e.g. target behaviors) that took away from the
quality of the experience.</p>
    </sec>
    <sec id="sec-6">
      <title>4. Future Directions</title>
      <p>The current state of DBT-based smartphone
applications is fragmented, with most
applications excluding features integral to
treatment. User feedback on the design and
functionality has been negative. Among the
four apps reviewed, DBT Coach and DBT
SelfHelp featured the most intuitive layouts and
engaging designs, but would benefit, from
including positive reinforcement and digital
nudging to increase engagement and passive
monitoring to complement user-inputted data.</p>
    </sec>
    <sec id="sec-7">
      <title>5. Acknowledgements</title>
      <p>TM would like to acknowledge Michael
Sobolev, Katrin Haensel, and Amit Baumel for
their support and encouragement.</p>
    </sec>
    <sec id="sec-8">
      <title>6. References</title>
    </sec>
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