@article{KirschKoenigsteinKunde2014,
  author    = {Kirsch, Wladimir and K{\"o}nigstein, Elisabeth and Kunde, Wilfried},
  title     = {Action feedback affects the perception of action-related objects beyond actual action success},
  doi       = {10.3389/fpsyg.2014.00017},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-112670},
  year      = {2014},
  abstract  = {Successful object-oriented action typically increases the perceived size of aimed target objects. This phenomenon has been assumed to reflect an impact of an actor's current action ability on visual perception. The actual action ability and the explicit knowledge of action outcome, however, were confounded in previous studies. The present experiments aimed at disentangling these two factors. Participants repeatedly tried to hit a circular target varying in size with a stylus movement under restricted feedback conditions. After each movement they were explicitly informed about the success in hitting the target and were then asked to judge target size. The explicit feedback regarding movement success was manipulated orthogonally to actual movement success. The results of three experiments indicated the participants' bias to judge relatively small targets as larger and relatively large targets as smaller after explicit feedback of failure than after explicit feedback of success. This pattern was independent of the actual motor performance, suggesting that the actors' evaluations of motor actions may bias perception of target objects in itself.},
  language  = {en}
}
@article{RoeslerRuboGamer2019,
  author    = {R{\"o}sler, Lara and Rubo, Marius and Gamer, Matthias},
  title     = {Artificial faces predict gaze allocation in complex dynamic scenes},
  series = {Frontiers in Psychology},
  volume    = {10},
  journal   = {Frontiers in Psychology},
  number    = {2877},
  issn      = {1664-1078},
  doi       = {10.3389/fpsyg.2019.02877},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-193024},
  year      = {2019},
  abstract  = {Both low-level physical saliency and social information, as presented by human heads or bodies, are known to drive gaze behavior in free-viewing tasks. Researchers have previously made use of a great variety of face stimuli, ranging from photographs of real humans to schematic faces, frequently without systematically differentiating between the two. In the current study, we used a Generalized Linear Mixed Model (GLMM) approach to investigate to what extent schematic artificial faces can predict gaze when they are presented alone or in competition with real human faces. Relative differences in predictive power became apparent, while GLMMs suggest substantial effects for real and artificial faces in all conditions. Artificial faces were accordingly less predictive than real human faces but still contributed significantly to gaze allocation. These results help to further our understanding of how social information guides gaze in complex naturalistic scenes.},
  language  = {en}
}
@article{KirschKundeHerbort2021,
  author    = {Kirsch, Wladimir and Kunde, Wilfried and Herbort, Oliver},
  title     = {Impact of proprioception on the perceived size and distance of external objects in a virtual action task},
  series = {Psychonomic Bulletin \& Review},
  volume    = {28},
  journal   = {Psychonomic Bulletin \& Review},
  number    = {4},
  issn      = {1531-5320},
  doi       = {10.3758/s13423-021-01915-y},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-273235},
  pages     = {1191-1201},
  year      = {2021},
  abstract  = {Previous research has revealed changes in the perception of objects due to changes of object-oriented actions. In present study, we varied the arm and finger postures in the context of a virtual reaching and grasping task and tested whether this manipulation can simultaneously affect the perceived size and distance of external objects. Participants manually controlled visual cursors, aiming at reaching and enclosing a distant target object, and judged the size and distance of this object. We observed that a visual-proprioceptive discrepancy introduced during the reaching part of the action simultaneously affected the judgments of target distance and of target size (Experiment 1). A related variation applied to the grasping part of the action affected the judgments of size, but not of distance of the target (Experiment 2). These results indicate that perceptual effects observed in the context of actions can directly arise through sensory integration of multimodal redundant signals and indirectly through perceptual constancy mechanisms.},
  language  = {en}
}
@phdthesis{Nguyen2023,
  author    = {Nguyen, Tu Anh Thi},
  title     = {Neural coding of different visual cues in the monarch butterfly sun compass},
  doi       = {10.25972/OPUS-30380},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-303807},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2023},
  abstract  = {Monarch butterflies are famous for their annual long-distance migration. Decreasing temperatures and reduced daylight induce the migratory state in the autumn generation of monarch butterflies. Not only are they in a reproductive diapause, they also produce fat deposits to be prepared for the upcoming journey: Driven by their instinct to migrate, they depart from their eclosion grounds in the northern regions of the North American continent and start their southern journey to their hibernation spots in Central Mexico. The butterflies cover a distance of up to 4000 km across the United States. In the next spring, the same butterflies invert their preferred heading direction due to seasonal changes and start their northward spring migration. The spring migration is continued by three consecutive butterfly generations, until the animals repopulate the northern regions in North America as non-migratory monarch butterflies. The monarch butterflies' migratory state is genetically and epigenetically regulated, including the directed flight behavior. Therefore, the insect's internal compass system does not only have to encode the butterflies preferred, but also its current heading direction. However, the butterfly's internal heading representation has to be matched to external cues, to avoid departing from its initial flight path and increasing its risk of missing its desired destination. During the migratory flight, visual cues provide the butterflies with reliable orientation information. The butterflies refer to the sun as their main orientation cue. In addition to the sun, the butterflies likely use the polarization pattern of the sky for orientation. The sky compass signals are processed within a region in the brain, termed the central complex (CX). Previous research on the CX neural circuitry of the monarch butterflies demonstrated that tangential central complex neurons (TL) carry the visual input information into the CX and respond to a simulated sun and polarized light. However, whether these cells process additional visual cues like the panoramic skyline is still unknown. Furthermore, little is known about how the migratory state affects visual cue processing. In addition to this, most experiments studying the monarch butterfly CX focused on how neurons process single visual cues. However, how combined visual stimuli are processed in the CX is still unknown. This thesis is investigating the following questions: 1) How does the migratory state affect visual cue processing in the TL cells within the monarch butterfly brain? 2) How are multiple visual cues integrated in the TL cells? 3) How is compass information modulated in the CX? To study these questions, TL neurons from both animal groups (migratory and non-migratory) were electrophysiologically characterized using intracellular recordings while presenting different simulated celestial cues and visual sceneries. I showed that the TL neurons of migratory butterflies are more narrowly tuned to the sun, possibly helping them in keeping a directed flight course during migration. Furthermore, I found that TL cells encode a panoramic skyline, suggesting that the CX network combines celestial and terrestrial information. Experiments with combined celestial stimuli revealed that the TL cells combine both cue information linearly. However, if exposing the animals to a simulated visual scenery containing a panoramic skyline and a simulated sun, the single visual cues are weighted differently. These results indicate that the CX's input region can flexibly adapt to different visual cue conditions. Furthermore, I characterize a previously unknown neuron in the monarch butterfly CX which responds to celestial stimuli and connects the CX with other brain neuropiles. How this cell type affects heading direction encoding has yet to be determined.},
  subject      = {Monarchfalter},
  language  = {en}
}