Holistic face perception impairment in acquired prosopagnosia as evidenced by eye-gaze-contingency: Generalization to several cases
Bibliographic record
Abstract
Gaze-contingency is a method introduced by Rayner (Cog. Psy., 1975) to investigate the perceptual span in reading by selectively revealing/masking a portion of the visual field in real time. Recently, we introduced this approach in the field of face perception, showing that a brain-damaged patient with impairment limited to face recognition (acquired prosopagnosia, patient PS) presents with the reverse pattern as normal observers: almost no further decrease of performance when only one feature at a time is available (foveal window condition), but a very large impairment when the fixated feature is masked (mask condition), forcing holistic perception (Van Belle et al., JOV 2009: http://www.journalofvision.org/content/9/8/541; Neuropsychologia, 2010). Here we extend these latter observations to two cases of acquired prosopagnosia with unilateral right hemisphere damage: GG (Busigny et al., Neuropsychologia, 2010; lingual, fusiform and parahippocampal damage) and LR (Bukach et al., J. Cogn. Neurosci., 2006; anterior pole damage). Both patients also present with impairment in visual recognition limited to faces. They were tested in a delayed face matching task with a full view, gaze contingent window, and gaze contingent mask condition. Similar to PS and contrary to normal observers, both patients were significantly more impaired with a mask than with a window, demonstrating problems with holistic face perception. These observations support a generalized account of acquired prosopagnosia as a selective impairment of holistic face perception, and imply that holistic perception is a key element of normal human face recognition. Furthermore, the similar behavioral pattern of all three patients despite their very different lesion locations supports a distributed network view of the neural face processing structures, meaning that the key function of face perception requires the activity of several brain areas of the right hemisphere and their mutual connectivity.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.002 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.002 | 0.000 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".