The temporal instability of cognitive performance

Michael E. Aristodemou • Boek • paperback

• Samenvatting
  Free download at https://doi.org/10.54195/9789465151182
  
  This thesis contributed to the empirical knowledge of cognitive variability through psychometric modeling of theory-based descriptive and mechanistic structures fitted to neural and behavioral data. We learned that cognitive variability is multidimensional: varying across tasks (Chapter 4) and timescales (Chapter 5). Chapter 3 taught us that, in a battery of response time tasks, cognitive variability is a correlate of inattention problems and is modulated by attentiveness as predicted by a noradrenergic mechanism. The results of Chapter 6 showed us that cognitive variability in a simple response-time task can be manipulated using methylphenidate, a transporter blocker of dopamine and noradrenaline. But contrary to prior hypotheses, the effect of methylphenidate could not be attributed to dopamine or a change in neural variability. Lastly, by examining the neural antecedents of cognitive variability, we learned that cognitive variability in a working memory task is driven by uncertainty in our encoded representations, which in turn depends on the neural resources spent to encode stimuli in the preceding trial (Chapter 7).
• Productinformatie
  Binding : Paperback
  Distributievorm : Boek (print, druk)
  Formaat : 170mm x 240mm
  Aantal pagina's : 576
  Uitgeverij : Radboud University Press
  ISBN : 9789465151182
  Datum publicatie : 10-2025
  
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