Higher-order Vision in Adults born at Extremely Low Birthweights
Bibliographic record
Abstract
Children born very prematurely later show deficits in higher-order vision, including global form, global motion, and biological motion with four times larger deficits in perceiving global motion than in perceiving global form (e.g., Atkinson & Braddick, 2007; Taylor et al., 2009). To determine whether any deficits are permanent or merely reflect slower visual development, we tested higher-order vision in 15 adults who had been born at <32 weeks gestation with an extremely low birthweight (M age at test=32.3 yrs, range 3034 yrs; M birthweight=814 gms, range 6001,000 gms) and in 14 comparably-aged adults who had been full-term and weighed at least 2500 gms at birth. Participants all had no neurological deficits such as cerebral palsy, decreased IQ, or seizures. All had normal or corrected-to-normal visual acuity. We used staircase procedures to measure sensitivity to (a) global form using concentric Glass patterns, (b) global motion at two speeds, and (c) biological motion. Surprisingly, the two groups performed comparably on all tasks. Specifically, sensitivity to global form was normal (signal threshold=13.6% in those born prematurely and 13.3% in controls, p>0.90). Sensitivity to global motion was normal, both when tested at 18 deg/sec (coherence threshold=25.7% in those born prematurely and 19.5% in controls, p>0.10) or at 4 deg/sec (coherence threshold=37.0% in those born prematurely and 23.7% in controls, p>0.10). Sensitivity to biological motion was also normal (threshold number of noise dots tolerated=63 in those born prematurely and 69 in controls, p>0.20). Thus, deficits in the processing of global form, global motion, and biological motion evident at 5 9 years of age for children born very prematurely appear to be a consequence of slower than normal development rather than a permanent outcome of prematurity. This pattern contrasts with our findings for cataract-reversal patients, in whom the deficits found during childhood appear permanent. Meeting abstract presented at VSS 2014
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".