Adaptive Origins: Evolution and Human Development - download pdf or read online

By Peter LaFrenière

ISBN-10: 0805860126

ISBN-13: 9780805860122

In this text, students are invited to reconsider psychology through grounding it within the usual sciences with the knowledge that evolutionary and developmental approaches interact with tradition to resolve difficulties of human variation. those techniques are solid as interdependent: improvement can't be understood other than within the mild of evolutionary thought, and the easiest evidence of evolution is the actual fact of improvement. for college students of evolutionary psychology, the entire relevant issues -- such as advanced psychological modules for thought of brain or language -- require an figuring out of the developmental approaches that result in their expression. Genes, as very important as they're, are by no means the total tale.

The role of organic components is explored in chapters outlining evolution, improvement, genetics, human origins, hormones and the mind. Then, the integrative worth of this evolutionary/developmental imaginative and prescient in realizing key subject matters in psychology is illustrated by way of utilising it to standard region of inquiry together with infancy and attachment, feelings and their expression, social family with friends, cognitive and language improvement, intercourse alterations, courtship and mating, violence and aggression, and cooperation and festival.

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This type of territorial aggression is unique to males and occurs only when they are in their home territory and another male approaches. In other words, the aggressive response has evolved in the male of the species as a conditional strategy and shows much greater flexibility than a simple reflex. Its adaptive function is to protect the male’s reproductive investment and ensure the survival of his offspring. An important philosophical foundation of classic ethology is the notion of critical realism (Eibl-Eibesfeldt, 1989; Lorenz, 1973; Popper, 1965), which assumes that species-typical adaptations mirror external reality.

Even within a species, the occurrence of novel forms does not generally correlate with levels of genetic variation sufficient to account for all morphological diversity. A major question is: If the novelty of life forms we observe in nature is not always reflected in the genome, where does it come from? Apart from mechanisms such as mutation and duplication, novelty may also arise by mutation-driven changes in gene regulation. , 2004). Diverse organisms may have similar developmental genes but highly divergent regulatory mechanisms for these genes.

We will have much more to say about this in Chapter 3. In theory, drift has been viewed as a potential source of evolutionary novelty since the introduction of Sewall Wright’s (1932) shifting balance theory. Wright proposed that drift can initiate change due to chance combinations of existing genes, as for example, the founder effect whereby a small, genetically isolated population produces a novel developmental response that is locally favored by selection. Temporary barriers initially protect the novel combination from erasure by gene flow, then later, after barriers are removed, the consolidated adaptive trait spreads.

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Adaptive Origins: Evolution and Human Development by Peter LaFrenière

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