Results 171 to 180 of about 53,398 (296)

Porphyrin biosynthesis in the soybean callus tissue system—XV. The effect of growth conditions [PDF]

open access: green, 1975
Alcira Batlle   +3 more
openalex   +1 more source

Research Review: A review of the past decade of family and genomic studies on adolescent mental health

open access: yesJournal of Child Psychology and Psychiatry, EarlyView.
Background Mental health problems and traits capturing psychopathology are common and often begin during adolescence. Decades of twin studies indicate that genetic factors explain around 50% of individual differences in adolescent psychopathology.
Geneviève Morneau‐Vaillancourt   +3 more
wiley   +1 more source

Metabolism of [3H]Gibberellin A20 in Light- and Dark-grown Tobacco Callus Cultures [PDF]

open access: bronze, 1976
Barbara Lance   +4 more
openalex   +1 more source

Theory‐Driven IRT Modeling of Vocabulary Development: Matthew Effects and the Case for Unipolar IRT

open access: yesJournal of Educational Measurement, EarlyView.
Abstract Item response theory (IRT) encompasses a broader class of measurement models than is commonly appreciated by practitioners in educational measurement. For measures of vocabulary and its development, we show how psychological theory might in certain instances support unipolar IRT modeling as a superior alternative to the more traditional ...
Qi (Helen) Huang   +2 more
wiley   +1 more source

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