Asa Hammar

Summary

Affiliation: University of Bergen
Country: Norway

Publications

  1. doi request reprint Enduring cognitive dysfunction in unipolar major depression: a test-retest study using the Stroop paradigm
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
    Scand J Psychol 51:304-8. 2010
  2. doi request reprint Information processing in patients with first episode major depression
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
    Scand J Psychol 53:445-9. 2012
  3. doi request reprint Effortful information processing in patients with major depression - a 10-year follow-up study
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Psychiatry Res 198:420-3. 2012
  4. ncbi request reprint Patients with major depression show intact memory performance--given optimal conditions
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen and Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Appl Neuropsychol 18:191-6. 2011
  5. doi request reprint Testing the cognitive effort hypothesis of cognitive impairment in major depression
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Nord J Psychiatry 65:74-80. 2011
  6. ncbi request reprint Long-lasting cognitive impairment in unipolar major depression: a 6-month follow-up study
    Asa Hammar
    Department of Biological and Medical Psychology, Division of Cognitive Neuroscience, University of Bergen, Aarstadveien 21, 5009 Norway
    Psychiatry Res 118:189-96. 2003
  7. ncbi request reprint Selective impairment in effortful information processing in major depression
    Asa Hammar
    Department of Biological and Medical Psychology, Division of Cognitive Neuroscience, University of Bergen, Norway
    J Int Neuropsychol Soc 9:954-9. 2003
  8. ncbi request reprint Automatic and effortful information processing in unipolar major depression
    Asa Hammar
    Department of Biological and Medical Psychology, Division of Cognitive Neuroscience, University of Bergen, Norway
    Scand J Psychol 44:409-13. 2003
  9. doi request reprint Go/NoGo performance in boys with Tourette syndrome
    Heike Eichele
    Department of Biological and Medical Psychology, Cognitive Neuroscience Group, University of Bergen, Norway
    Child Neuropsychol 16:162-8. 2010
  10. doi request reprint Subjective sleep quality in relation to inhibition and heart rate variability in patients with panic disorder
    Anders Hovland
    Department of Clinical Psychology, University of Bergen, Norway
    J Affect Disord 150:152-5. 2013

Detail Information

Publications23

  1. doi request reprint Enduring cognitive dysfunction in unipolar major depression: a test-retest study using the Stroop paradigm
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
    Scand J Psychol 51:304-8. 2010
    ....
  2. doi request reprint Information processing in patients with first episode major depression
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
    Scand J Psychol 53:445-9. 2012
    ..Findings in the present study indicate that patients with a first episode of depression perform equally to healthy controls in tasks requiring visual attention in both effortful and non-effortful information processing...
  3. doi request reprint Effortful information processing in patients with major depression - a 10-year follow-up study
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Psychiatry Res 198:420-3. 2012
    ..These results indicate that short-term effortful cognitive impairments normalize over the course of long-term recovery that goes together with clinical improvement and remission...
  4. ncbi request reprint Patients with major depression show intact memory performance--given optimal conditions
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen and Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Appl Neuropsychol 18:191-6. 2011
    ..It is important to highlight the intact verbal memory performance in the acute phase of illness to detect cognitive strengths in this patient group...
  5. doi request reprint Testing the cognitive effort hypothesis of cognitive impairment in major depression
    Asa Hammar
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Nord J Psychiatry 65:74-80. 2011
    ..It is widely accepted that depression is associated with deficits in a range of cognitive domains. However, there is no consensus regarding the neuropsychological profile in depression...
  6. ncbi request reprint Long-lasting cognitive impairment in unipolar major depression: a 6-month follow-up study
    Asa Hammar
    Department of Biological and Medical Psychology, Division of Cognitive Neuroscience, University of Bergen, Aarstadveien 21, 5009 Norway
    Psychiatry Res 118:189-96. 2003
    ....
  7. ncbi request reprint Selective impairment in effortful information processing in major depression
    Asa Hammar
    Department of Biological and Medical Psychology, Division of Cognitive Neuroscience, University of Bergen, Norway
    J Int Neuropsychol Soc 9:954-9. 2003
    ..Depressed patients seem to have impaired performance on effortful but not automatic information processing...
  8. ncbi request reprint Automatic and effortful information processing in unipolar major depression
    Asa Hammar
    Department of Biological and Medical Psychology, Division of Cognitive Neuroscience, University of Bergen, Norway
    Scand J Psychol 44:409-13. 2003
    ..Thus it seems as if the depressed patients show an impaired profile as a function of the degree of effort a task requires...
  9. doi request reprint Go/NoGo performance in boys with Tourette syndrome
    Heike Eichele
    Department of Biological and Medical Psychology, Cognitive Neuroscience Group, University of Bergen, Norway
    Child Neuropsychol 16:162-8. 2010
    ..The results are discussed with reference to inhibitory adaptive effects that may be employed by TS participants to maintain high accuracy at the cost of overall slower performance. These effects may be suspended prior to errors...
  10. doi request reprint Subjective sleep quality in relation to inhibition and heart rate variability in patients with panic disorder
    Anders Hovland
    Department of Clinical Psychology, University of Bergen, Norway
    J Affect Disord 150:152-5. 2013
    ..The present study aimed to investigate the interrelationships between subjectively reported sleep impairment, cognitive inhibition and vagally mediated HRV in a sample characterised by variability on measures of all these constructs...
  11. doi request reprint Prolonged impairment in inhibition and semantic fluency in a follow-up study of recurrent major depression
    Marit Schmid
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Arch Clin Neuropsychol 26:677-86. 2011
    ..Further, the results show that impaired inhibition in the acute phase was strongly correlated with impaired inhibition in the follow-up, suggesting that the inability to inhibit may represent a trait marker in recurrent MDD...
  12. doi request reprint The relationship between residual symptoms of depression and emotional information processing
    Mari Strand
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Nord J Psychiatry 67:233-9. 2013
    ..This study was carried out to examine the relationships between major depressive disorder (MDD), level of depressive symptoms and bias in emotional effortful information processing...
  13. pmc Reduced white matter connectivity in the corpus callosum of children with Tourette syndrome
    Kerstin J Plessen
    Center for Child and Adolescent Mental Health, University of Bergen, Bergen, Norway
    J Child Psychol Psychiatry 47:1013-22. 2006
    ....
  14. ncbi request reprint Cognitive function in first episode major depressive disorder: poor inhibition and semantic fluency performance
    Marit Schmid
    a Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
    Cogn Neuropsychiatry 18:515-30. 2013
    ..However, few studies have addressed these issues and investigated cognitive functioning with a particular focus on EF in patients who experience MDD for the first time...
  15. pmc Neurocognitive profiles in treatment-resistant bipolar I and bipolar II disorder depression
    Ute Kessler
    Moodnet Research Group, Psychiatric Division, Haukeland University Hospital, Bergen, Norway
    BMC Psychiatry 13:105. 2013
    ....
  16. doi request reprint Emotional information processing in major depression remission and partial remission: faces come first
    Mari Strand
    Department of Biological and Medical Psychology, University of Bergen, and Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Appl Neuropsychol Adult 20:110-9. 2013
    ..Future studies testing the sensitivity of the Emotional Stroop test in the investigation of attention to complex emotional information is needed. Clinical implications are discussed...
  17. doi request reprint Health-related quality of life in recurrent major depressive disorder--a 10-year follow-up study
    Guro Ardal
    Department of Biological and Medical Psychology, University of Bergen and Moodnet Research Group, Haukeland University Hospital, University of Bergen, Bergen, Norway
    Nord J Psychiatry 67:339-43. 2013
    ..Major depressive disorder strongly affects health-related quality of life (HRQOL). Few studies have followed patients suffering recurrent major depressive disorder (rMDD) and paid attention to HRQOL in remitted state...
  18. ncbi request reprint Frequency and characteristics of recurrent major depressed patients with unimpaired executive functions
    Kirsten I Stordal
    Department of Clinical Medicine, Section of Psychiatry, University of Bergen, Bergen, Norway
    World J Biol Psychiatry 6:36-44. 2005
    ..Since cognitive impairment and depressive symptomatology seem to be distinct dimensions, a neuropsychological investigation could help to ensure optimal treatment in patients with recurrent major depression...
  19. pmc Functional brain asymmetry, attentional modulation, and interhemispheric transfer in boys with Tourette syndrome
    Kerstin J Plessen
    Center for Child and Adolescent Mental Health, University of Bergen, Norway
    Neuropsychologia 45:767-74. 2007
    ..When instructed to focus attention on the left ear stimulus, however, performance deteriorated in the TS group. Correlations with CC area further supported the hypothesized presence of deviant callosal functioning in the TS group...
  20. doi request reprint The relationships among heart rate variability, executive functions, and clinical variables in patients with panic disorder
    Anders Hovland
    Department of Clinical Psychology, University of Bergen, Norway
    Int J Psychophysiol 86:269-75. 2012
    ..Both panic-related distress and duration of PD were inversely related with measures of HRV and cognitive inhibition. The current findings support the purported relationship between HRV and executive functions involving the PFC...
  21. ncbi request reprint Is impairment in cognitive inhibition in the acute phase of major depression irreversible? Results from a 10-year follow-up study
    Guro Ardal
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Psychol Psychother 84:141-50. 2011
    ..The aim of this study was to investigate whether the impairment observed in cognitive inhibition in the acute phase of depression is reversible or irreversible in a 10-year follow-up assessment...