Bibliographic record
Abstract
OBJECTIVES: This analysis estimates the percentage of adolescents who have had sexual intercourse by age 14 or 15 and examines characteristics at age 12 or 13 that are associated with early sexual activity. DATA SOURCE: The data are from the 1996/97, 1998/99 and 2000/01 National Longitudinal Survey of Children and Youth, conducted by Statistics Canada. ANALYTICAL TECHNIQUES: Descriptive statistics were used to determine the proportion of 14- or 15-year-olds who have had sexual intercourse. Logistic regression was used to model sexual activity at age 14 or 15 in relation to the adolescent's characteristics at age 12 or 13. MAIN RESULTS: The percentages of boys and girls who had had intercourse by age 14 or 15 were almost the same--12% and 13%--but the characteristics associated with such behaviour differed. Among girls, region of residence, the onset of puberty, weak self-concept, having tried smoking or drinking, and not being overweight were significantly associated with early sexual activity. For boys, older age, a poor relationship with parents, low household income, and having tried smoking were significant.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.032 | 0.005 |
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".