CAOS 2024 - 8 | Rovereto, May 9-11 | Katja Fiehler

CAOS 2024 - 8 | Rovereto, May 9-11 | Katja Fiehler

by Katja Fiehler

Life & Natural Systems Medicine & Health MNSurgeryMNSSurgical orthopaedics and fractures
🎙 Katja Fiehler 👥 2K 📅 November 13, 2025 ⏱ 59 min 👁 29 📄 original study 🧭 2026-08-16
Available in: English (current) Français

Keywords

allocentric codingegocentric codingreachingnaturalistic environmentsvirtual reality

Summary

Katja Fiehler’s talk at the CAOS 2024 workshop focuses on how the brain localizes objects for reaching in naturalistic environments. She begins by contrasting egocentric and allocentric reference frames, noting that while both are used, allocentric cues can improve reach accuracy. Previous studies using simple stimuli showed that landmarks influence reaching, but Fiehler’s lab extends this to complex scenes. In a series of experiments using photographs and computer-generated images, they found that task relevance is crucial: only objects that are potential reach targets influence reaching endpoints, while background objects do not, even when shifted. They also demonstrated that allocentric coding occurs not only in memory-guided but also in online reaching, though the effect is stronger for memory-guided movements. Moving to virtual reality, they replicated findings in 3D and showed that monocular depth cues like object size influence allocentric coding in depth. Finally, they are investigating how object semantics affect allocentric coding, using a multi-arrangement task to quantify semantic similarity. The talk highlights the importance of studying behavior in naturalistic settings and integrating scene perception with spatial coding.

177 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides valuable insights into the factors influencing allocentric coding of action targets, moving beyond simple stimuli to more naturalistic scenes. The argumentation is solid, with clear hypotheses and systematic experiments. The speaker carefully controls for potential confounds and replicates findings across studies. The progression from 2D to 3D and the inclusion of online actions strengthen the ecological validity. The discussion of task relevance and the distinction between memory-guided and online actions are particularly informative. The speaker also connects her work to broader theories like the two-streams model, showing how her findings align with or extend current knowledge.

Scientific Rigor, Source Quality, Title Accuracy

The talk demonstrates scientific rigor through careful experimental design and replication. The speaker references relevant literature, including work by Crawford’s group and others, and builds on established findings. The title accurately reflects the content, focusing on localizing objects in naturalistic environments. The talk is a conference presentation, so it is not peer-reviewed, but the methodology and results appear sound. The speaker does not overstate her conclusions and acknowledges limitations. The sources cited are appropriate and support the claims made.

193 words

Title / Content Match

The title accurately reflects the content, focusing on localizing objects in naturalistic environments.

Quality & Reliability

8/10

The talk presents original research from a reputable lab, with clear methodology and replication of previous findings. The speaker is an established researcher in the field. However, the talk is a conference presentation, not a peer-reviewed publication, and some details are simplified for a general audience.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

  • Crawford et al. (2011) - Neural representations of the visual field — Supports the role of allocentric coding in reaching

Contribution & Novelties

The talk contributes original findings on how the brain uses allocentric information in naturalistic environments, showing that task relevance is a key factor and that allocentric coding extends to online actions and depth. It also introduces a novel approach combining spatial coding with object semantics.

Pour aller plus loin :

  • Two-streams hypothesis — Relevant to the discussion of dorsal and ventral streams.
  • Allocentric and egocentric spatial representations — Overview of the concepts.
  • Virtual reality in neuroscience research — Discusses the use of VR in studying spatial cognition.

87 words

Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower technical level, indicating a well-balanced and accessible presentation of complex research.

Reliability 8/10

💬 No comments were provided for analysis.