Reference health
Assessment of effects of socio-economic status on IQ in a full cross-fostering study
6/6 checkable references clean · checked 2026-08-06
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
6 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 6 checked references that resolve
resolves10.1126/science.663634
Intellectual Status of Working-Class Children Adopted Early into Upper-Middle-Class Families
resolves10.1037/0033-2909.84.2.309
Genotype-environment interaction and correlation in the analysis of human behavior.
The 6 references without a DOI — listed, not checked
no DOI — not checkedSkodak, M. & Skeels, H. M. J. genet. Psychol. 75, 85–125 (1949).
no DOI — not checkedScarr, S. & Weinberg, R. in Race. Social Class and Individual Differences in IQ (ed. Scarr, S.) (Lawrence Erlbaum, Hillsdale, N.J., 1989).
no DOI — not checkedSchiff, M. et al. in Education and Class (eds Schiff, M. & Lewontin, R.) 41–54 (Oxford University Press, 1986).
no DOI — not checkedWechsler, D. L. in Manuel: Echelle d'Intelligence de Wechsler pour Enfants Forme Révisée (Centre de Psychologie Appliquée, Paris, 1981).
no DOI — not checkedINSEE, Nomenclature des Professions et Catégories Socioprofessionnelles (Imprimerie Nationale, Paris, 1983).
no DOI — not checkedWechsler, D. in Manuel; Echelle d'Intelligence pour Enfants (Centre de Psychologie Appliqué, Paris, 1965).
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work were clean at the dated check: each resolved to a known work in a public registry, and none
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checked 2026-08-06 — re-checked daily as this page is visited; titles and statuses come from Crossref and DataCite and are not part of the signed record
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