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A number of traits can vary as a result of shortening of the fetal development of a trait or by prolongation of the same. In such a case, a shift in the time a trait is allowed to develop before it is fixed can bring forth an ancestral phenotype. [5] Atavisms are often seen as evidence of evolution. [6]
Atavistic regression is a hypnosis-related concept introduced by the Australian scholar and psychiatrist Ainslie Meares. Meares coined his term from the English atavism , which is derived from the Latin atavus , meaning a great-grandfather's grandfather and, thus, more generally, an ancestor.
Suggestion refers to the period in which the ideas and emotions of the crowd are primarily drawn from a shared unconscious ideology. Crowd members become susceptible to any passing idea or emotion. [26] This behavior comes from an archaic shared unconscious and is therefore uncivilized in nature.
Two types of heterogeneity have been identified in association with psychiatric genetics: causal and clinical. Causal heterogeneity refers to a situation in which two or more causes can independently induce the same clinical syndrome. Clinical heterogeneity refers to when a single cause can lead to more than one clinical syndrome. [7]
The hypothesis suggests that most people are not hard wired to any particular life script and likewise young people are generally fluid enough to move between different pop trends with ease and some humour. Grunge for example is viewed as an atavistic hybrid, drawing on elements of both punk and hippie culture. [22]
Atavism or atavistic is a concept in biology and in culture. It may also refer to: a record label; an album by Slough Feg; an album by Otep
Essentialism refers to the belief that members of a particular social category share a fixed, underlying nature or essence, a belief that some scholars have considered a cognitive bias. [ 20 ] [ 21 ] [ 22 ] Essentialism therefore incorporates beliefs of both entitativity and naturalness. [ 12 ]
Adaptationism is an approach to studying the evolution of form and function. It attempts to frame the existence and persistence of traits, assuming that each of them arose independently and improved the reproductive success of the organism's ancestors.