• Academic Self-Efficacy, Procrastination, and Attrition Intentions 

      Nemtcan, Efim; Sæle, Rannveig Grøm; Gamst-Klaussen, Thor; Svartdal, Frode (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-24)
      Why do students leave universities? The current study addresses the problem of academic attrition from the perspective of students’ intentions. Specifically, we focus on the roles of academic self-efficacy and procrastination in exploring their relationships with attrition intentions. Based on existing research, we expected a negative relationship between academic self-efficacy and attrition ...
    • Assessment of outcome measures for cost–utility analysis in depression: mapping depression scales onto the EQ-5D-5L 

      Gamst-Klaussen, Thor; Lamu, Admassu N.; Chen, Gang; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-13)
      <i>Background:</i> Many clinical studies including mental health interventions do not use a health state utility instrument, which is essential for producing quality-adjusted life years. In the absence of such utility instrument, mapping algorithms can be applied to estimate utilities from a disease-specific instrument.<p> <p><i>Aims:</i> We aim to develop mapping algorithms from two widely used ...
    • Do country-specific preference weights matter in the choice of mapping algorithms? The case of mapping the Diabetes-39 onto eight country-specific EQ-5D-5L value sets 

      Lamu, Admassu Nadew; Chen, Gang; Gamst-Klaussen, Thor; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-22)
      <p><i>Purpose</i>: To develop mapping algorithms that transform Diabetes-39 (D-39) scores onto EQ-5D-5L utility values for each of eight recently published country-specific EQ-5D-5L value sets, and to compare mapping functions across the EQ-5D-5L value sets.</p> <p><i>Methods</i>: Data include 924 individuals with self-reported diabetes from six countries. The D-39 dimensions, age and gender ...
    • Does the EQ-5D usual activities dimension measure what it intends to measure? The relative importance of work, study, housework, family or leisure activities 

      Gamst-Klaussen, Thor; Lamu, Admassu Nadew (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-23)
      <i>Background</i> - The EQ-5D is the most widely used generic preference-based health-related quality of life measure. It comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. The usual activities dimension asks respondents to evaluate the severity of problems in their usual activities, such as work, study, housework, family or leisure activities. ...
    • Drop-out and transfer-out intentions: The role of socio-cognitive factors 

      Nemtcan, Efim; Sæle, Rannveig Grøm; Gamst-Klaussen, Thor; Svartdal, Frode (Journal article; Tidsskriftartikkel, 2020-12-23)
      Academic attrition is a worldwide problem representing a significant economic loss and a disadvantage for students in terms of health and career prospects. We focus on the roles of academic skills, academic self-efficacy, and students' integration in exploring their relation to attrition intentions. Based on existing research, we expected a negative relation between academic skills and attrition ...
    • Exploring the causal and effect nature of EQ-5D dimensions: an application of confirmatory tetrad analysis and confirmatory factor analysis 

      Gamst-Klaussen, Thor; Gudex, Claire; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-31)
      <p><i>Background</i>: The relationship between the various items in an HRQoL instrument is a key aspect of interpreting and understanding preference weights. The aims of this paper were i) to use theoretical models of HRQoL to develop a conceptual framework for causal and effect relationships among the five dimensions of the EQ-5D instrument, and ii) to empirically test this framework.</p> ...
    • Health state utility instruments compared: inquiring into nonlinearity across EQ-5D-5L, SF-6D, HUI-3 and 15D 

      Gamst-Klaussen, Thor; Chen, Gang; Lamu, Admassu Nadew; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-21)
      Purpose Different health state utility (HSU) instruments produce different utilities for the same individuals, thereby compromising the intended comparability of economic evaluations of health care interventions. When developing crosswalks, previous studies have indicated nonlinear relationships. This paper inquires into the degree of nonlinearity across the four most widely used HSU-instruments ...
    • How study environments foster academic procrastination: Overview and recommendations 

      Svartdal, Frode; Dahl, Tove I.; Gamst-Klaussen, Thor; Koppenborg, Markus; Klingsieck, Katrin (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-02)
      Procrastination is common among students, with prevalence estimates double or even triple those of the working population. This inflated prevalence indicates that the academic environment may appear as “procrastination friendly” to students. In the present paper, we identify social, cultural, organizational, and contextual factors that may foster or facilitate procrastination (such as large degree ...
    • Measuring implemental delay in procrastination: Separating onset and sustained goal striving 

      Svartdal, Frode; Klingsieck, Katrin; Steel, Piers; Gamst-Klaussen, Thor (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-13)
      Scales measuring procrastination focus on different aspects of unnecessary and unwanted delay, delay in task implementation – an increased gap between intention and action – being a core characteristic. However, an inspection of existing procrastination scales reveals that the scales do not distinguish between two facets of implemental delay, <i>onset delay</i>, and delay related to <i>sustained ...
    • Preference Weighting of Health State Values: What Difference Does It Make, and Why? 

      Lamu, Admassu Nadew; Gamst-Klaussen, Thor; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-23)
      Background:<br> Most patient-reported outcome measures apply a simple summary score to assess health-related quality of life, whereby equal weight is normally assigned to each item. In the generic preference-based instruments, utility weighting is essential whereby health state values are estimated through preference elicitation and complex algorithms. <br>Objectives:<br> To examine the extent ...
    • Procrastination and personal finances: Exploring the roles of planning and financial self-efficacy 

      Gamst-Klaussen, Thor; Steel, Piers; Svartdal, Frode (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-05)
      Procrastination is related to unhealthy personal financial behaviors, such as postponing retirement savings, last minute shopping, and not paying bills on time. The present paper explores factors that could explain why procrastinators demonstrate more financial problems compared to non-procrastinators. Study 1 (N = 675) focused on planning, as both procrastination and poor financial habits are ...
    • Study Habits and Procrastination: The Role of Academic Self-Efficacy 

      Svartdal, Frode; Sæle, Rannveig Grøm; Dahl, Tove I.; Nemtcan, Efim; Gamst-Klaussen, Thor (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-03)
      Inefficient study skills increase the probability that study work is perceived as difficult and aversive, with procrastination as a likely result. As a remedy, more effective study skills and habits may be encouraged. However, research indicates that good study skills and habits may not by themselves be sufficient to remedy problems, as this relationship may be mediated by efficacy beliefs related ...
    • Three essays on measuring health-related quality of life: external and internal relationships of the EQ-5D-5L 

      Gamst-Klaussen, Thor (Doctoral thesis; Doktorgradsavhandling, 2019-01-18)
      The use of quality-adjusted life years (QALYs) as a commensurable health outcome measure has been encouraged by health authorities in many countries in order to aid decisions on healthcare priorities. A key methodological challenge is to estimate the weights used for valuing health-related quality of life, i.e. the “Q” in QALY, based on people’s preferences. Such generic preference-based measures ...