Denise Cadete - 15th Frith Prize Lecture (2026)

Value of the Information & Strength of the Argument

The lecture provides valuable insights into body perception, a relatively understudied area. The speaker presents a coherent narrative, building from established illusions (rubber hand, mirror box) to her own novel paradigms. The argumentation is solid: she systematically tests alternative explanations (e.g., invisibility, finger-specificity) and acknowledges limitations. The use of multiple experiments and converging evidence strengthens the claims. The discussion of clinical and evolutionary implications adds depth. However, some conclusions are based on single studies and would benefit from replication.

Scientific Rigor, Source Quality, Title Accuracy

The lecture demonstrates scientific rigor through detailed methodology and appropriate referencing. The speaker cites key studies (e.g., Nagel, Ramachandran, Botvinick & Cohen) and recent work (e.g., Tamar Makin’s group). The title accurately reflects the content. The presentation is well-structured, with clear hypotheses and results. The speaker is careful not to overstate findings, acknowledging uncertainties. The inclusion of control conditions and statistical analyses (e.g., perceived location) enhances credibility.

The title accurately reflects the content: a prize lecture by Denise Cadete presenting her research on body perception.

8/10

The lecture presents original research from the speaker's PhD, with references to established studies (e.g., rubber hand illusion, mirror box) and recent findings. The methodology is described in detail, and the results are presented with appropriate caution. However, as a single lecture, it lacks peer review and independent replication.

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

• 00:00Introduction: What is it like to have a body? Nagel's bat analogy, octopus example.
• 02:00Body map in the brain, phantom limb persistence.
• 05:00Rubber hand illusion and its use in studying body perception.
• 08:00Six-finger illusion: method and initial findings.
• 12:00Testing shape and posture flexibility of the extra finger.
• 18:00Application to anorexia: posture constraint.
• 22:00Action affordances: changes in perceived hand size.
• 26:00Extra arm illusion and self-other boundary.
• 30:00Evolutionary and clinical perspectives: six-finger individuals, robotic extra finger.
• 34:00Perceived hand weight: psychophysical staircase, underestimation, fatigue effect.

• Nagel, T. (1974). What is it like to be a bat? — Philosophical basis for the subjective experience of having a body.
• Botvinick, M., & Cohen, J. (1998). Rubber hands 'feel' touch that eyes see. — Classic rubber hand illusion study.
• Ramachandran, V. S., & Rogers-Ramachandran, D. (1996). Synaesthesia in phantom limbs induced with mirrors. — Mirror box illusion for phantom limb pain.
• Guterstam, A., et al. (2013). The invisible hand illusion. — Invisible hand illusion study.
• Makin, T. R., et al. (2013). Phantom limb pain and the brain. — Persistence of limb representation after amputation.
• Kieliba, P., et al. (2021). Robotic sixth finger and cortical changes. — Study on robotic extra finger and motor control.

• Botvinick, M., & Cohen, J. (1998). Rubber hands 'feel' touch that eyes see. — Supports the role of synchronous visual-tactile stimulation in body ownership.
• Guterstam, A., et al. (2013). The invisible hand illusion. — Shows that invisibility alone does not explain flexibility; posture constraints remain.
• Makin, T. R., et al. (2013). Phantom limb pain and the brain. — Supports persistence of body representation after limb loss.

• Kieliba, P., et al. (2021). Robotic sixth finger and cortical changes. — Suggests that using a robotic extra finger may reduce motor control, contrasting with the idea of enhanced abilities.