Gerrit Hirschfeld

Gerrit Hirschfeld
Fachhochschule Bielefeld · Fachbereich Wirtschaft

Professor

About

110
Publications
36,934
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2,584
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Introduction
I work as professor for applied psychology, research methods and diagnostics in the department of business (https://www.fh-bielefeld.de/wirtschaft). My research on health-related issues is conducted within CareTech -Center for Health, Welfare and Technology (https://www.caretech-owl.de). Additionaly, I provide consulting services via my Steinbeis Transfer Center (www.steinbeis.de/su/2322).
Additional affiliations
September 2018 - present
Fachhochschule Bielefeld
Position
  • Professor (Full)
September 2014 - August 2018
Hochschule Osnabrück
Position
  • Professor (Full)
October 2010 - August 2014
Kinderklinik Datteln
Position
  • PostDoc Position

Publications

Publications (110)
Article
Full-text available
Introduction The Beck Depression Inventory revised (BDI-II) is widely used tool to screen for depression. The aim of the present study was to systematically review and synthesize studies that determined optimal cut points for the BDI-II. Method We identified 27 studies that tried to identify optimal cut points for the BDI-II. Study quality was ass...
Preprint
Full-text available
'Optimal cutpoints' for binary classification tasks are often established by testing which cutpoint yields the best discrimination, for example the Youden index, in a specific sample. This results in 'optimal' cutpoints that are highly variable and systematically overestimate the out-of-sample performance. To address these concerns, the cutpointr p...
Article
Simulation studies are helpful in testing novel statistical methods. From a computational perspective, they constitute embarrassingly parallel tasks. We describe parallelization techniques in the programming language R that can be used on Amazon's cloud‐based infrastructure. After a short conceptual overview of the parallelization techniques in R,...
Article
Background: For pediatric chronic pain patients, intensive interdisciplinary pain treatment (IIPT) is a well-established treatment. The treatment's short-term effectiveness can be improved by an additive psychosocial aftercare (PAC). However, neither the program's long-term effectiveness nor the patients in particular need have been investigated y...
Article
Full-text available
Introduction Analyses of clinical trial registries (CTRs) offer insights into methodological problems of published research studies, e.g., non-publication and outcome-switching. Here, we use CTRs as a tool to evaluate clinical studies conducted in Germany and test how their registration quality is associated with time and structural factors: Coordi...
Article
Full-text available
Importance Severe chronic pediatric pain causes individual suffering and significantly affects social functioning and psychological well-being. For children with high pain severity, intensive interdisciplinary pain treatment (IIPT) is a well-established treatment. However, across specialized centers, it is not sufficient for all patients. Objectiv...
Conference Paper
Full-text available
User Experience wird oftmals anhand von Befragungen mittels standardisierter Fragebögen erfasst. Allerdings bringen dabei gerade quantitative Online-Datenerhebungen den großen Nachteil mit sich, dass die Umstände, unter denen die Befragten an der Untersuchung teilnehmen zumeist nur schwer zu kontrollieren sind. Insbesondere ist unklar, unter welche...
Conference Paper
The vast majority of the German population uses the internet on a regular basis. Past research has shown that depressiveness has a negative influence on the user experience of websites, which in turn is an important predictor for the success of web content. The present study investigates the influence of worrying and intolerance of uncertainty on w...
Article
Full-text available
Registries of clinical trials are a potential source for scientometric analysis of medical research and serve important functions for the research community and the public at large. Clinical trials that recruit patients in Germany are usually registered in the German Clinical Trials Register (DRKS) or in international registries such as ClinicalTri...
Article
Objectives To identify self-reported pain scores that best represent categories of no pain, mild, moderate, and severe pain in children, and a pain score that accurately represents a child’s perceived need for medication (PNM), i.e. a minimum pain score at which a child would want an analgesic. Study design Prospective cross-sectional cohort study...
Article
"Optimal cutpoints" for binary classification tasks are often established by testing which cutpoint yields the best discrimination, for example the Youden index, in a specific sample. This results in "optimal" cutpoints that are highly variable and systematically overestimate the out-of-sample performance. To address these concerns, the cutpointr p...
Article
Introduction : Patient reported outcomes are central to the evaluation of behavioral, drug, or somatic interventions focusing depression. Continuous measures are mostly interpreted with cut points that serve as inclusion criteria and define remission. The present review provides an overview of measures (BDI; BDI-II; CESD; HADS; HAMD-17; MADRS; PHQ-...
Article
Full-text available
Background: The Sexual Interest and Desire Inventory-Female (SIDI-F) is a clinician-administered scale that allows for a comprehensive assessment of symptoms related to Hypoactive Sexual Desire Dysfunction (HSDD). As self-report questionnaires may facilitate less socially desirable responding and as time and resources are scarce in many clinical a...
Article
Full-text available
More than one-third of adolescents experience recurrent headaches. Usually, these headaches are of primary origin and modulated by different biological and psychosocial factors. While parents are often consulted in scientific research and medical care about the nature of their child’s headache, it is unclear to what extent parents and their childre...
Article
Full-text available
Background: Although pediatric chronic pain is common, it is not yet clear which individuals with chronic pain are likely to seek health care for their pain. The aims of this study were to summarize the current evidence of characteristics of children and adolescents with chronic pain who consult a physician or use medication for their pain. Additi...
Preprint
Full-text available
Background: The Sexual Interest and Desire Inventory Female (SIDI-F) is a clinician-administered scale that allows for a comprehensive assessment of symptoms related to Hypoactive Sexual Desire Dysfunction (HSDD). As self-report questionnaires may facilitate less socially desirable responding and as time and resources are scarce in many clinical an...
Article
Full-text available
Introduction: Generic measures of health-related quality of life are important in pediatrics. Here, we try to establish optimal cut points for the self-report and parental-report versions of the KIDSCREEN-10. Method: We re-analyzed data from the German Health Interview and Examination Survey for Children and Adolescents (KiGGS) study. In total,...
Preprint
We investigated whether design experts or laypersons evaluate webpages differently. Twenty participants, 10 experts and 10 laypersons, judged the aesthetic value of a webpage in an EEG-experiment. Screenshots of 150 webpages, judged as aesthetic or as unaesthetic by another 136 participants, served as stimulus material. Behaviorally, experts and la...
Article
The course of maternal repetitive negative thinking at the transition to motherhood and early mother–infant interactions: Is there a link? – ADDENDUM - Dana Müller, Tobias Teismann, Gerrit Hirschfeld, Norbert Zmyj, Sabrina Fuths, Silja Vocks, Silvia Schneider, Sabine Seehagen
Conference Paper
Full-text available
Scores of different evaluation measures resulting from website tests are difficult to interpret without comparative data. Benchmarks and optimal cut points provide such interpretation aids. Benchmarks are usually built with test score means based on a tested pool of comparable websites. Optimal cut points are calculated with an external criterion u...
Conference Paper
Full-text available
When planning studies to evaluate websites practitioners need to answer two central questions: (1) Which instrument should be used? (2) How many users should be queried? While the answer to the first question depends on the goal of the specific evaluation, the second question can also be answered in relation to fundamental psychometric relationship...
Article
Full-text available
Mindfulness-based interventions are effective at improving sexual dysfunctions in women, yet the mechanisms of action are less clear. Our objective was to investigate the impact of three mindfulness exercises on women’s sexual response. Forty-nine women participated in a laboratory session involving a series of 5-minute exercises and erotic films....
Article
Full-text available
Objective: Long-term follow-ups several years after receiving cognitive behavioral therapy (CBT) are scarce and most of the existing literature describes follow-up data of randomized-controlled trials. Thus, very little is known about the long-term effects of CBT in routine care. Methods: We investigated psychological functioning in a sample of...
Article
Background Identifying changes in pain score associated with clinically meaningful outcomes is necessary when using self‐report measures to assess pain in children. We aimed to determine the changes in pain score associated with a minimum clinically significant difference (MCSD), ideal clinically significant difference (ICSD), and patient‐perceived...
Article
Users access the Internet not only to pursue specific goals (e.g. searching for information), but also to browse through content in a more exploratory fashion. The current study experimentally manipulates participants’ tasks in order to investigate how goal-directed (searching) or exploratory (browsing) website activities moderate the impact of key...
Article
The present study evaluates a brief, cross-cultural scale that maps a wide range of social resources, useful in large-scale assessments of perceived social support. The Brief Perceived Social Support Questionnaire (Fragebogen zur Sozialen Unterstützung Kurzform mit sechs Items, F-SozU K-6) was examined in representative and university student sampl...
Article
Full-text available
Potential long-term associations between repetitive negative thinking and mother-infant interactions have received little attention. The current longitudinal study including N = 62 mother-infant dyads investigated both maternal and infant behavior in face-to-face interactions as a function of pre- and postnatal maternal repetitive negative thinking...
Article
Positive factors are increasingly recognized in the field of psychology, however, few studies have investigated the longitudinal measurement invariance (LMI) and reciprocal associations of positive core constructs, such as happiness, life satisfaction and positive mental health. This study evaluated the LMI of these constructs over four years in a...
Article
Checking behavior (CB) occurs in a variety of disorders such as obsessive-compulsive (OCD), body dysmorphic (BDD), illness anxiety (IA), and panic disorder (PD), as well as anorexia (AN) and bulimia nervosa (BN). Etiological models of these disorders – with the exception of those for PD – postulate that CB mainly occurs in situations characterized...
Conference Paper
Full-text available
Der vorliegende Beitrag stellt die Merkmale guter User Experience (UX) Fragebögen anhand von zentralen Kriterien heraus. Neben den klassischen Gütekriterien, insbesondere Reliabilität und Validität, werden hierbei die Grundlagen eines Verfahrens sowie die praktische Anwendung diskutiert. Eine beispielhafte Illustration erfolgt anhand etablierter UX...
Conference Paper
Full-text available
Zusammenfassung Inhalte sind zentral im Internet-und damit auch deren Wahrnehmung und Bewertung durch die Nutzer-Innen. Der hier vorgestellte Web-CLIC-Fragebogen erfasst zentrale Facetten dieser Inhaltswahrneh-mung. In einer Übersicht wird die Konstruktion und Validierung des Fragebogens basierend auf einer Serie von sieben Studien mit insgesamt n...
Article
The Brief Symptom Inventory (BSI)-18 is a widely-used tool to assess changes in general distress in patients despite an ongoing debate about its factorial structure and lack of evidence for longitudinal measurement invariance (LMI). We investigated BSI-18 scores from 1,081 patients from an outpatient clinic collected after the 2nd, 6th, 10th, 18th,...
Article
Objective: The German version of the Social Phobia and Anxiety Inventory (SPAI-G) is a validated measure for the detection of social anxiety disorder (SAD). The aim of the present study was to develop optimal cut points (OC) for remission and response to treatment for the SPAI-G. Methods: We used Receiver Operating Characteristic methods and boo...
Article
Fear of pain plays an important role in the maintenance of chronic pain. It may be reduced through exposure therapy. This 2-arm parallel samples randomized controlled trial aimed to investigate whether interoceptive exposure (IE) therapy enhances reductions in fear of pain (primary outcome), pain (pain intensity, pain-related disability, and school...
Article
The Liebowitz Social Anxiety Scale (LSAS) is the most frequently used instrument to assess social anxiety disorder (SAD) in clinical research and practice. Both a self‐reported (LSAS‐SR) and a clinician‐administered (LSAS‐CA) version are available. The aim of the present study was to define optimal cut‐off (OC) scores for remission and response to...
Article
Background Chemotherapy-induced Peripheral Neuropathy (CIPN) of large-fibers affects up to 20% of survivors of pediatric acute lymphoblastic leukemia (ALL). We aimed to describe small-fiber toxicity and pain sensitization in this group. Methods In a cross-sectional, bicentric study we assessed 46 survivors of pediatric ALL (Mean age: 5.7 ± 3.5 yea...
Article
Introduction: Many patients with cerebral palsy (CP) suffer chronic pain as one of the most limiting factors in their quality of life. In CP patients, pain mechanisms are not well understood, and pain therapy remains a challenge. Quantitative sensory testing (QST) might provide unique information about the functional status of the somatosensory sy...
Article
Full-text available
We investigated whether design experts or laypersons evaluate webpages differently. Twenty participants, 10 experts and 10 laypersons, judged the aesthetic value of a webpage in an EEG-experiment. Screenshots of 150 webpages, judged as aesthetic or as unaesthetic by another 136 participants, served as stimulus material. Behaviorally, experts and la...
Data
ERP Data Grand averages for the individual participants
Article
Full-text available
Recent theoretical models suggest that repetitive negative thinking might be a key mechanism explaining the negative effects of maternal psychopathology on mother–infant relations. While an emerging body of research largely supports this idea, the relative importance of differences in the trajectory of repetitive negative thinking during and after...
Article
Research into positive aspects of the psyche is growing as psychologists learn more about the protective role of positive processes in the development and course of mental disorders, and about their substantial role in promoting mental health. With increasing globalization, there is strong interest in studies examining positive constructs across cu...
Article
Objectives: The aims of this study were to define the Faces Pain Scale-Revised (FPS-R) and Color Analog Scale (CAS) scores associated with no pain, mild pain, moderate pain, and severe pain in children with acute pain, and to identify differences based on age, sex, and ethnicity. Methods: We conducted a prospective observational study in 2 pedia...
Article
Full-text available
Background Families with lower socioeconomic status (SES) often face problems with gaining access to health care services. Information is scarce on the relationship between SES and health care delivery for children suffering from chronic pain. Methods Families presenting to a specialized pain center (N = 1,001) provided information on ‘household in...
Article
Suicide is a major cause of death in adulthood and specifically in patients suffering from mental illnesses. The Depressive Symptom Inventory Suicidality Subscale (DSI-SS) is widely used to detect and prevent suicidal ideation. The aim of the present study was to determine optimal cut points for the DSI-SS in different populations. We analysed the...
Article
Full-text available
Zusammenfassung. Theoretischer Hintergrund: Bisherige Studien zeigen, dass internetbasierte Interventionen kurzfristig die Veranderungsmotivation bei Essstorungen verbessern konnen. Zur Stabilitat dieser Effekte ist jedoch wenig bekannt. Fragestellung: Wie entwickeln sich die Veranderungsmotivation, die Essstorungspsychopathologie und das Selbstwer...
Article
Full-text available
The assessment of somatosensory function is a cornerstone of research and clinical practice in neurology. Recent initiatives have developed novel protocols for quantitative sensory testing (QST). Application of these methods led to intriguing findings, such as the presence lower pain-thresholds in healthy children compared to healthy adolescents. I...
Article
Full-text available
Background: The aim of this study was to characterize postmortem organ donation attitudes in various German cohorts. Material/Methods: Employees of 2 German cities and 2 German university hospitals, employees of a German automobile enterprise, and members of a German Medical Society were administered a questionnaire about postmortem organ and tissu...
Conference Paper
Die Ausbildung im Fach Wirtschaftsmathematik ist ein wichtiger Bestandteil verschiedener Studiengänge. Häufig entstehen dabei unterschiedliche Aufgabensammlungen, die sowohl in der Notation als auch im Format (handschriftlich / digital) variieren. Der Pflegeaufwand solcher Aufgabensammlungen ist sehr hoch und es mangelt häufig an neuen Aufgaben. Du...
Article
Full-text available
Usability is a core construct of website evaluation and inherently defined as interactive. Yet, when analysing first impressions of websites, expected usability, i.e., before use, is of interest. Here we investigate to what extend ratings of expected usability are related to (a) experienced usability, i.e., ratings after use, and (b) objective usab...
Article
Full-text available
Pediatric debilitating chronic pain is a severe health problem, often requiring complex interventions such as intensive interdisciplinary pain treatment (IIPT). Research is lacking regarding the effectiveness of IIPT for children. The objective was to systematically review studies evaluating the effects of IIPT. Cochrane, Medline/Ovid, PsycInfo/OVI...
Article
Full-text available
There is little knowledge regarding the association between psychological factors and complex regional pain syndrome (CRPS) in children. Specifically, it is not known which factors precipitate CRPS and which result from the ongoing painful disease. OBJECTIVES: To examine symptoms of depression and anxiety as well as the experience of stressful life...
Article
Full-text available
Background. Recurrent pain is a common experience in childhood, but only few children with recurrent pain attend a physician. Previous studies yielded conflicting findings with regard to predictors of health care utilization in children with recurrent pain. Methods. The present study analyzes data from the German Health Interview and Examination Su...
Article
This review aimed to synthesize the current evidence on the effectiveness of invasive treatments for Complex Regional Pain Syndrome (CRPS) in children and adolescents. Studies on children and adolescents with CRPS that evaluated the effects of invasive treatment were identified in PubMed (search March 2013). Thirty-six studies met the inclusion cr...
Article
Objectives The objective was to determine the minimum and ideal clinically significant differences (MCSD, ICSD) in pain intensity in children for the Faces Pain Scale–Revised (FPS-R) and the Color Analog Scale (CAS) and to identify any differences in these estimates based on patient characteristics.Methods This was a prospective study of children a...
Article
Full-text available
Subjective perceptions of websites can be reliably measured with questionnaires. But it is unclear how such scores should be interpreted in practice, e.g. is an aesthetics score of 4 points on a 7-point-scale satisfactory? The current paper introduces a ROC-based methodology to establish meaningful cut points for the VisAWI (Visual Aesthetics of We...
Article
AimsTo assess the diagnostic utility of a novel abbreviated monofilament test in comparison with the tuning fork test to detect diabetic peripheral neuropathy in children.MethodsA total of 88 children with Type 1 diabetes mellitus were screened for diabetic peripheral neuropathy using the monofilament test and the tuning fork. Nerve conduction stud...
Article
Researchers often use exploratory factor analysis (EFA) to develop and refine questionnaires assessing the Big Five personality traits. We use sequential sampling and bootstrapping to determine the number of participants needed to yield stable loading patterns for the Big Five Inventory (BFI) and the International Personality Item Pool Big Five mea...
Preprint
Full-text available
Aim: Empirical studies in medicine – and most other fields of study - yield results that are uncertain to a certain degree. Medical research on interventions has made tremendous leaps forward by quantifying and reporting this uncertainty using p-values and confidence intervals. In contrast to this, most diagnostic studies that determine optimal cut...
Preprint
Aim: Empirical studies in medicine – and most other fields of study - yield results that are uncertain to a certain degree. Medical research on interventions has made tremendous leaps forward by quantifying and reporting this uncertainty using p-values and confidence intervals. In contrast to this, most diagnostic studies that determine optimal cut...
Preprint
Full-text available
Background : Recurrent pain is a common experience in childhood, but only few children with recurrent pain attend a physician. Previous small-scale studies yielded conflicting findings with regard to predictors of health care utilization in children with recurrent pain. Methods : The present study analyzes a subset of the data from the German Healt...
Preprint
Background : Recurrent pain is a common experience in childhood, but only few children with recurrent pain attend a physician. Previous small-scale studies yielded conflicting findings with regard to predictors of health care utilization in children with recurrent pain. Methods : The present study analyzes a subset of the data from the German Healt...
Article
Purpose To analyse the willingness for postmortem cornea donation in Germany. Methods Employees in two cities (UKM, UKS), and university hospitals (STM, STE), members of the German Ophthalmological Society (DOG), and employees of an automobile company (BO) participated in a questionnaire about postmortem cornea donation attitudes. The questionnaire...
Article
Full-text available
Multiple-group confirmatory factor analysis (MG-CFA) is among the most productive extensions of structural equation modeling. Many researchers conducting cross-cultural or longitudinal studies are interested in testing for measurement and structural invariance. The aim of the present paper is to provide a tutorial in MG-CFA using the freely availab...
Article
Full-text available
Although guidelines for the management of children with type 1 diabetes include recommendations to screen for diabetic peripheral neuropathies (DPN), the research into the diagnostic utility of screening methods has not been systematically reviewed. The goal of this study was to summarize the findings with regard to the diagnostic accuracy of the S...
Article
Full-text available
One of the main problems of Internet-delivered interventions for a range of disorders is the high dropout rate, yet little is known about the factors associated with this. We recently developed and tested a Web-based 6-session program to enhance motivation to change for women with anorexia nervosa, bulimia nervosa, or related subthreshold eating pa...
Article
Full-text available
Students’ feedback is common in teaching evaluation, but there is no documented instrument enabling instructors to systematically gather relevant student feedback on written exams in higher education. Three studies are described to develop a valid instrument for evaluating written exams. Study 1 analyzes characteristics of effective written exams f...
Article
Background: The chronic pain grading (CPG), a standard approach to classify the severity of pain conditions in adults, combines the characteristics of pain intensity and pain-related disability. However, in children and adolescents, the CPG has only been validated in a school sample, but not in the actual target population, i.e., clinical populati...