@article{OberauerKliegl2004,
  author    = {Oberauer, Klaus and Kliegl, Reinhold},
  title     = {Simultaneous cognitive operations in working memory after dual-task practice},
  issn      = {0096-1523},
  year      = {2004},
  abstract  = {The authors tested the hypothesis that with adequate practice, people can execute 2 cognitive operations in working memory simultaneously. In Experiment 1, 6 students practiced updating 2 items in working memory through 2 sequences of operations (1 numerical, 1 spatial). In different blocks, imperative stimuli for the 2 sequences of operations were presented either simultaneously or sequentially. Initially, most participants experienced substantial dual-task costs. After 24 sessions of practice, operation latencies for simultaneous presentation were equal to the maximum of times for the 2 operations in the sequential condition, suggesting perfect timesharing. Experiment 2 showed that a reduction of dual-task costs requires practice on the combination of the 2 updating tasks, not just practice on each individual task. Hence, the reduction of dual-task costs cannot be explained by shortening or automatization of individual operations},
  language  = {en}
}
@article{OberauerWendlandKliegl2003,
  author    = {Oberauer, Klaus and Wendland, Mirko and Kliegl, Reinhold},
  title     = {Age differences in working memory : the roles of storage and selective access},
  year      = {2003},
  language  = {en}
}
@article{OberauerDemmrichMayretal.2001,
  author    = {Oberauer, Klaus and Demmrich, Anke and Mayr, Ulrich and Kliegl, Reinhold},
  title     = {Dissociating retention and access in working memory : an age-comparative study of mental arithmetic},
  year      = {2001},
  language  = {en}
}
@article{OberauerKliegl2001,
  author    = {Oberauer, Klaus and Kliegl, Reinhold},
  title     = {Beyond resources : formal models of complexity effects in age differences in working memory},
  year      = {2001},
  language  = {en}
}
@article{KlieglMayrOberauer2000,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Oberauer, Klaus},
  title     = {Resource limitations and process dissociations in individual differences research},
  year      = {2000},
  language  = {en}
}
@article{GoetheOberauerKliegl2008,
  author    = {G{\"o}the, Katrin and Oberauer, Klaus and Kliegl, Reinhold},
  title     = {Age differences in dual-task performance after practice},
  issn      = {0882-7974},
  doi       = {10.1037/0882-7974.22.3.596},
  year      = {2008},
  abstract  = {This study investigated whether older adults could acquire the ability to perform 2 cognitive operations in parallel in a paradigm in which young adults had been shown to be able to do so (K. Oberauer \& R. Kliegl, 2004). Twelve young and 12 older adults practiced a numerical and a visuospatial continuous memory updating task in single-task and dual-task conditions for 16 to 24 sessions. After practice, 9 young adults were able to process the 2 tasks without dual- task costs, but none of the older adults had reached the criterion of parallel processing. The results suggest a qualitative difference between young and older adults in how they approach dual-task situations.},
  language  = {en}
}
@article{OberauerKliegl2006,
  author    = {Oberauer, Klaus and Kliegl, Reinhold},
  title     = {A formal model of capacity limits in working memory},
  series = {Journal of Memory and Language},
  volume    = {55},
  journal   = {Journal of Memory and Language},
  number    = {4},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0749-596X},
  doi       = {10.1016/j.jml.2006.08.009},
  pages     = {601 -- 626},
  year      = {2006},
  abstract  = {A mathematical model of working-memory capacity limits is proposed on the key assumption of mutual interference between items in working memory. Interference is assumed to arise from overwriting of features shared by these items. The model was fit to time-accuracy data of memory-updating tasks from four experiments using nonlinear mixed effect (NLME) models as a framework. The model gave a good account of the data from a numerical and a spatial task version. The performance pattern in a combination of numerical and spatial updating could be explained by variations in the interference parameter: assuming less feature overlap between contents from different domains than between contents from the same domain, the model can account for double dissociations of content domains in dual-task experiments. Experiment 3 extended this idea to similarity within the verbal domain. The decline of memory accuracy with increasing memory load was steeper with phonologically similar than with dissimilar material, although processing speed was faster for the similar material. The model captured the similarity effects with a higher estimated interference parameter for the similar than for the dissimilar condition. The results are difficult to explain with alternative models, in particular models incorporating time-based decay and models assuming limited resource pools.},
  language  = {en}
}
@article{RodriguezVillagraGoetheOberaueretal.2013,
  author    = {Rodriguez-Villagra, Odir Antonio and G{\"o}the, Katrin and Oberauer, Klaus and Kliegl, Reinhold},
  title     = {Working memory capacity in a go/no-go task - age differences in interference, processing speed, and attentional control},
  series = {Developmental psychology},
  volume    = {49},
  journal   = {Developmental psychology},
  number    = {9},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0012-1649},
  doi       = {10.1037/a0030883},
  pages     = {1683 -- 1696},
  year      = {2013},
  abstract  = {We tested the limits of working-memory capacity (WMC) of young adults, old adults, and children with a memory-updating task. The task consisted of mentally shifting spatial positions within a grid according to arrows, their color signaling either only go (control) or go/no-go conditions. The interference model (IM) of Oberauer and Kliegl (2006) was simultaneously fitted to the data of all groups. In addition to the 3 main model parameters (feature overlap, noise, and processing rate), we estimated the time for switching between go and no-go steps as a new model parameter. In this study, we examined the IM parameters across the life span. The IM parameter estimates show that (a) conditions were not different in interference by feature overlap and interference by confusion; (b) switching costs time; (c) young adults and children were less susceptible than old adults to interference due to feature overlap; (d) noise was highest for children, followed by old and young adults; (e) old adults differed from children and young adults in lower processing rate; and (f) children and old adults had a larger switch cost between go steps and no-go steps. Thus, the results of this study indicated that across age, the IM parameters contribute distinctively for explaining the limits of WMC.},
  language  = {en}
}