selection effects
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Selection bias — is a statistical bias in which there is an error in choosing the individuals or groups to take part in a scientific study.[1] It is sometimes referred to as the selection effect. The term selection bias most often refers to the distortion of a… … Wikipedia
Selection cutting — is the silvicultural practice of harvesting a proportion of the trees in a stand. Selection cutting is the practice of removing mature timber or thinning to improve the timber stand. This system may be used to manage even or uneven aged stands.… … Wikipedia
Selection (Australian history) — Selection referred to free selection before survey of crown land in some Australian colonies under land legislation introduced in the 1860s. These acts were similar to the United States Homestead Act and were intended to encourage closer… … Wikipedia
Selection — mergefrom|Evolutionary pressure|Talk:Selection|date=September 2007|Richard001In the context of evolution, certain traits or alleles of a species may be subject to selection. Under selection, individuals with advantageous or adaptive traits tend… … Wikipedia
Effects of cannabis — Short term effects of cannabis Classification and external resources ICD 10 F12.0 The effects of cannabis are caused by cannabinoids, most notably tetrahydrocannabinol (THC). Cannabis has both psychological and physiological effects on the human… … Wikipedia
sample selection bias — Non random selection is both a source of bias in empirical research and a fundamental aspect of many social processes. When observations in social research are selected so that they are not independent of the outcome variables in a study, sample… … Dictionary of sociology
Cultural selection theory — is a scientific discipline that explores sociological and cultural evolution the same way that Darwinian selection theory is used to explain biological evolution. This theory is an extension of memetics. In memetics, memes, much like biology s… … Wikipedia
Natural selection — For other uses, see Natural Selection (disambiguation). Part of a series on Evolutionary Biology … Wikipedia
Sexual selection — This article is about the evolutionary concept. For the selection of the sex of offspring, see sex selection. Goldie s Bird of paradise: Ornamented male above; female below. Paradesia decora by John Gerrard Keulemans (d.1912) Sexual selection, a… … Wikipedia
Marker assisted selection — or marker aided selection (MAS) is a process whereby a marker (morphological, biochemical or one based on DNA/RNA variation) is used for indirect selection of a genetic determinant or determinants of a trait of interest (i.e. productivity,… … Wikipedia
