Geir Pedersen

Sigmund Karterud9
Theresa Wilberg7
Benjamin Hummelen4
Øyvind Urnes4
Elfrida H Kvarstein2
9Sigmund Karterud
7Theresa Wilberg
4Benjamin Hummelen
4Øyvind Urnes
2Elfrida H Kvarstein
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The study evaluated the quality of the DSM-IV obsessive-compulsive personality disorder (OCPD) construct as a prototype category. A sample of 2237 patients from the Norwegian Network of Psychotherapeutic Day Hospitals was examined by a variety of psychometric analyses. A high number of OCPD patients (77%) had co-occurrent PDs, but only the co-occurrence(More)
The main explanatory hypothesis for the distinction between social phobia (SP) and avoidant personality disorder (APD) has been the severity continuum hypothesis, stating that APD only differs from SP in terms of severity of dysfunction and symptomatic distress, that is, social anxiety and depressive symptoms. This study aimed at a comprehensive evaluation(More)
Acoustic measurement of near-bottom fish with a directional transducer is generally problematical because the powerful bottom echo interferes with weaker echoes from fish within the main lobe but at greater ranges than that of the bottom. The volume that is obscured is called the dead zone. This has already been estimated for the special case of a flat(More)
Few studies have compared the psychosocial problems associated with different types of personality disorders (PDs). The aim of this study was to investigate the functional impairment and symptomatic distress associated with six PD diagnoses coded in DSM-IV: paranoid, borderline, avoidant, dependent, obsessive-compulsive PD and PD not otherwise specified, as(More)
Former studies have repeatedly found the psychoticism (PSY) scale of Symptom Checklist-90-Revised to be a heterogeneous construct. The aim of this study was to confirm and further explore the nature of this heterogeneity within a large sample of patients with mainly personality disorders. Within a total sample of 3 794 patients, one-half was randomly(More)
Patients with personality disorders represent maladaptive attachment strategies, influencing the quality of their interpersonal relationships. Within these patient populations, it is important to have a measure, easily applied, to assess such strategies. A widely used instrument is Experiences in Close Relationships (ECR), assessing two constructs called(More)
BACKGROUND Although psychotherapy is considered the treatment of choice for patients with personality disorders (PDs), there is no consensus about the optimal level of care for this group of patients. This study reports the results from the 6-year follow-up of the Ullevål Personality Project (UPP), a randomized clinical trial comparing outpatient individual(More)
The properties of the 17-item Mentalization-Based Treatment Adherence and Competence Scale (MBT-ACS) were investigated in a reliability study in which 18 psychotherapy sessions, comprising two sessions by nine different therapists, were rated by seven different raters. The overall reliabilities for adherence and competence for seven raters were high, .84(More)
The acoustic backscatter from pressure release prolate spheroids and a three-dimensional representation of a fish swimbladder (Chilean jack mackerel, Trachurus symmetricus murphyi) was calculated using four target strength models (Kirchhoff-approximation, Kirchhoff-ray-mode, finite element solution of the Helmholtz equation, and(More)
This study relates to the schizotypal personality disorder (SPD) proposal of the upcoming fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) by investigating the construct validity of SPD as defined by DSM-IV in a large sample of patients from the Norwegian Network of Personality-Focused Treatment Programs (N = 2619),(More)