Download Constructing Scientific Psychology: Karl Lashley’s by Nadine M. Weidman PDF

By Nadine M. Weidman

Developing clinical Psychology is the 1st full-scale interpretation of the lifestyles and paintings of the key American neuropsychologist Karl Lashley. It units Lashley's study on the middle of 2 controversies that polarized the yankee lifestyles and human sciences within the first 1/2 the 20th century. those involved the connection among "mind" and "brain" and the relative roles of "nature" and "nurture" in shaping habit and intelligence. The e-book explodes the parable of Lashley's neuropsychology as a fact-driven, "pure" technology via arguing trust within the strength of heredity and a nativist and deeply conservative racial ideology knowledgeable each point of his idea and perform.

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Extra info for Constructing Scientific Psychology: Karl Lashley’s Mind-Brain Debates

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Lashley and Jennings 29 there inheritance of individual differences within the population, and if so, what part do diverse races play in this inheritance? . "33 While he admitted that the environment did play a role in creating some of this variety, Lashley remained firmly committed to the idea that populations of Hydra did consist of races with different hereditary constitutions: It has been found that within a wild population of Hydra viridis there are hereditarily diverse races which differ in their number of tentacles at separation from the parent, in their size at a different age, and less certainly in other characters.

Jennings considered the possibility that mating somehow rejuvenated the lines, so that their vital processes were stimulated. But this was not always the case, Jennings found; after mating some of the lines suffered a loss of vitality. He therefore discarded the theory of rejuvenescence, and concluded instead that sexual reproduction served to increase diversity, so that after mating there was a wider variation in vitality than before. The characteristics produced by sexual reproduction were passed from parent to progeny, so that eventually a number of hereditarily diverse stocks or families, different "races," appeared.

Jennings and Lashley collaborated on two studies of the effects of conjugation on size and vitality of Paramecium, which were published in 1913 in the Journal of Comparative Zoology. Lashley's dissertation, also under Jennings's direction, was on inheritance in asexual reproduction in Hydra; this and a follow-up study appeared in the same journal, in 1915 and 1916 respectively. During these years Lashley also began a collaboration with Watson. 12 Together they went to the Dry Tortugas and worked on the homing and nesting behavior of noddy and sooty terns.

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