50 research outputs found
Adaptive Cognitive Interaction Systems
Adaptive kognitive Interaktionssysteme beobachten und modellieren den Zustand ihres Benutzers und passen das Systemverhalten entsprechend an. Ein solches System besteht aus drei Komponenten: Dem empirischen kognitiven Modell, dem komputationalen kognitiven Modell und dem adaptiven Interaktionsmanager. Die vorliegende Arbeit enthält zahlreiche Beiträge zur Entwicklung dieser Komponenten sowie zu deren Kombination. Die Ergebnisse werden in zahlreichen Benutzerstudien validiert
Measuring Faithful and Plausible Visual Grounding in VQA
Metrics for Visual Grounding (VG) in Visual Question Answering (VQA) systems
primarily aim to measure a system's reliance on relevant parts of the image
when inferring an answer to the given question. Lack of VG has been a common
problem among state-of-the-art VQA systems and can manifest in over-reliance on
irrelevant image parts or a disregard for the visual modality entirely.
Although inference capabilities of VQA models are often illustrated by a few
qualitative illustrations, most systems are not quantitatively assessed for
their VG properties. We believe, an easily calculated criterion for
meaningfully measuring a system's VG can help remedy this shortcoming, as well
as add another valuable dimension to model evaluations and analysis. To this
end, we propose a new VG metric that captures if a model a) identifies
question-relevant objects in the scene, and b) actually relies on the
information contained in the relevant objects when producing its answer, i.e.,
if its visual grounding is both "faithful" and "plausible". Our metric, called
"Faithful and Plausible Visual Grounding" (FPVG), is straightforward to
determine for most VQA model designs.
We give a detailed description of FPVG and evaluate several reference systems
spanning various VQA architectures. Code to support the metric calculations on
the GQA data set is available on GitHub
Technikbasiertes Spiel von Tagespflegebesuchern mit und ohne Demenz: Effekte, Heuristiken und Korrelate
Das Spiel von alten Menschen ist bislang relativ unbeachtet geblieben. Wir untersuchen dieses Thema
mithilfe eines Tablet-Memory-Spiels wissenschaftlich auf 2 Ebenen: anhand einer psychologischen
Beobachtung, die durch eine Spielprotokollanalyse
ergänzt wird, und anhand einer deduktiv-induktiven
Interpretation der kulturellen Spieltheorie
Technische Unterstützung für Menschen mit Demenz : Symposium 30.09. - 01.10.2013
Wie sollten technische Systeme zur Unterstützung von Menschen mit Demenz gestaltet sein? Was wünschen sich die Patienten, Angehörigen, Pflegenden, und Ärzte? Und was können technische Assistenzsysteme überhaupt leisten? Am KIT fand im Oktober 2013 ein Symposium zu diesen Fragen statt. Experten aus verschiedenen Disziplinen kamen zusammen, um den aktuellen Stand in den jeweiligen Gebieten zu erörtern. Dieser Band gibt einen Überblick über die Erkenntnisse aus den verschiedenen Blickwinkeln
Mechanisms within the Parietal Cortex Correlate with the Benefits of Random Practice in Motor Adaptation
The motor learning literature shows an increased retest or transfer performance after practicing under unstable (random) conditions. This random practice effect (also known as contextual interference effect) is frequently investigated on the behavioral level and discussed in the context of mechanisms of the dorsolateral prefrontal cortex and increased cognitive efforts during movement planning. However, there is a lack of studies examining the random practice effect in motor adaptation tasks and, in general, the underlying neural processes of the random practice effect are not fully understood. We tested 24 right-handed human subjects performing a reaching task using a robotic manipulandum. Subjects learned to adapt either to a blocked or a random schedule of different force field perturbations while subjects’ electroencephalography (EEG) was recorded. The behavioral results showed a distinct random practice effect in terms of a more stabilized retest performance of the random compared to the blocked practicing group. Further analyses showed that this effect correlates with changes in the alpha band power in electrodes over parietal areas. We conclude that the random practice effect in this study is facilitated by mechanisms within the parietal cortex during movement execution which might reflect online feedback mechanisms
Editorial: Detection and Estimation of Working Memory States and Cognitive Functions Based on Neurophysiological Measures
International audienc