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@ARTICLE{Langner:19836,
      author       = {Langner, R. and Eickhoff, S.B. and Steinborn, M.},
      title        = {{M}ental {F}atigue {M}odulates {D}ynamic {A}daptation to
                      {P}erceptual {D}emand in {S}peeded {D}etection},
      journal      = {PLoS one},
      volume       = {6},
      issn         = {1932-6203},
      address      = {Lawrence, Kan.},
      publisher    = {PLoS},
      reportid     = {PreJuSER-19836},
      pages        = {e28399},
      year         = {2011},
      note         = {SBE was supported by the Human Brain Project
                      (R01-MH074457-01A1), the Initiative and Networking Fund of
                      the Helmholtz Association within the Helmholtz Alliance on
                      Systems Biology (Human Brain Model), and the Deutsche
                      Forschungsgemeinschaft (IRTG 1328). The funders had no role
                      in study design, data collection and analysis, decision to
                      publish, or preparation of the manuscript.},
      abstract     = {When stimulus intensity in simple reaction-time tasks
                      randomly varies across trials, detection speed usually
                      improves after a low-intensity trial. With auditory stimuli,
                      this improvement was often found to be asymmetric, being
                      greater on current low-intensity trials. Our study
                      investigated (1) whether asymmetric sequential intensity
                      adaptation also occurs with visual stimuli; (2) whether
                      these adjustments reflect decision-criterion shifts or,
                      rather, a modulation of perceptual sensitivity; and (3) how
                      sequential intensity adaptation and its underlying
                      mechanisms are affected by mental fatigue induced through
                      prolonged performance. In a continuous speeded detection
                      task with randomly alternating high- and low-intensity
                      visual stimuli, the reaction-time benefit after
                      low-intensity trials was greater on subsequent low- than
                      high-intensity trials. This asymmetry, however, only
                      developed with time on task (TOT). Signal-detection analyses
                      showed that the decision criterion transiently became more
                      liberal after a low-intensity trial, whereas observer
                      sensitivity increased when the preceding and current
                      stimulus were of equal intensity. TOT-induced mental fatigue
                      only affected sensitivity, which dropped more on low- than
                      on high-intensity trials. This differential fatigue-related
                      sensitivity decrease selectively enhanced the impact of
                      criterion down-shifts on low-intensity trials, revealing how
                      the interplay of two perceptual mechanisms and their
                      modulation by fatigue combine to produce the observed
                      overall pattern of asymmetric performance adjustments to
                      varying visual intensity in continuous speeded detection.
                      Our results have implications for similar patterns of
                      sequential demand adaptation in other cognitive domains as
                      well as for real-world prolonged detection performance.},
      keywords     = {Adaptation, Physiological / Adult / Attention: physiology /
                      Female / Humans / Male / Mental Fatigue: physiopathology /
                      Reaction Time: physiology / Signal Detection, Psychological
                      / Visual Perception: physiology / Young Adult / J (WoSType)},
      cin          = {INM-2},
      ddc          = {500},
      cid          = {I:(DE-Juel1)INM-2-20090406},
      pnm          = {Funktion und Dysfunktion des Nervensystems (FUEK409) /
                      89571 - Connectivity and Activity (POF2-89571)},
      pid          = {G:(DE-Juel1)FUEK409 / G:(DE-HGF)POF2-89571},
      shelfmark    = {Biology},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22145041},
      pmc          = {pmc:PMC3228758},
      UT           = {WOS:000298168900024},
      doi          = {10.1371/journal.pone.0028399},
      url          = {https://juser.fz-juelich.de/record/19836},
}