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Psychology 1001 Week 3 notes

by: Stephen Black

Psychology 1001 Week 3 notes PSYC1001

Marketplace > University of Cincinnati > PSYC1001 > Psychology 1001 Week 3 notes
Stephen Black
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Covers Week 3 of Intro to Psychology. Expect anything from these notes to be on the exam
Introduction to Psychology
John Holden
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This 8 page Class Notes was uploaded by Stephen Black on Monday February 1, 2016. The Class Notes belongs to PSYC1001 at University of Cincinnati taught by John Holden in Winter 2016. Since its upload, it has received 35 views.


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Date Created: 02/01/16
Psychology 1001 Week 3 notes WEEK 3 Red- Definition Bold- Important Word or Concept Nature and Nurture Nature: Contributions of Genetic Inheritance Nurture: Contributions of Learning and Environment A Brief Intro to Genetics • A gene maintains and transfer discrete pieces of hereditary information during the process of cell division. • A popular misconception is that single genes directly code for traits expressed in our phenotype. • This is only rarely true, for example with eye color, and some genetic diseases (e.g., sickle-cell anemia) Genotype- an organisms hereditary information Phenotype- The observable form of an organism, the expression of its genetic and environmental interactions. • Genes participate in complex interactions that generate proteins which, in turn, affect cellular and extracellular processes that give rise to traits expressed in phenotypes Heritability • Proportion of population variability in some characteristic that can be explained in terms of genetic variability • Variability due to genetic differences/otal variability in the population Epigenetics-Study of how genetics interacts with the environment Adaptive Traits • William Paley(1802) Creationist account • All adapted entities exhibit functional organization • They entail a set of behaviors, components and processes that, when combined, allow an organism to do what it is supposed to do. • Argued functional organization can’t just happen, it must be put there by design • Thus, according to Paley, each species displays the work of a Creator, who gave each species just the right traits to survive in its niche Rise of Evolutionary Thinking • Jean Lamarck(1744-1829) Fossil evidence indicated that later forms of animals were different from earlier forms. He proposed a theory of acquired characteristics • 1. Environmental changes are responsible for structural changes in plants and animals • 2. The resulting changes are passed to the plant/animals offspring • e.g., If the parent’s survival depended on the development of strong muscles, the child would be born with strong muscles • But he lacked evidence or a framework for understanding what would be inherited, and how. • Herbert Spencer (1820-1903) • Applied Lamarck’s theory of transmutation (later evolution) to everything—matter, life etc. • Argued that all things begin as undifferentiated wholes, and become increasingly complex through the process of evolution • Successful behavioral responses to environmental events are more likely to be repeated in the future • Proposed that experience based associations are passed to the next generation in the form of instincts • Charles Darwin (1809-1882) • After a sketchy attempt at a medical degree, and on the advice of his father, Darwin entered Cambridge to be trained as clergyman • He was always interested in entomology and happened on an opportunity to be a naturalist as part of a 5-year British scientific expedition aboard the Beagle (1831-1836) • He was specifically hired to gather evidence to refute early evolutionary theories in favor of a creationist perspective. • While collecting specimens, he noticed that “like” organisms differed from place to place, even when separated by short distances (esp. on the Galápagos islands) • He became convinced that species change their character over space and time • By the time he returned to England he was on the verge of seriously considering the notion of transmutation • That happened once his “hunches” began to be confirmed by experts that examined his collections upon his return • Darwin still need a driving principle that guided the process of transmutation • Because of the materialist scientific bent of Darwin’s times, it had to look very much like a demonstrable force—a Newtonian force • He realized, while reading Thomas Malthus’s Essay on the principle of population that the battle between population growth and resource limits could be an agent of change • Darwin extended the already familiar notion of artificial selection used by breeders and suggested that a form of natural selection emerges from resource competition • Darwin proposed that the Natural selection of adaptive characteristics from among the range of individual differences within a species is what accounts for the progressive transmutation or evolution of a species over long time periods. • All other things equal, the fittest, the best adapted individuals will tend to survive and breed—survival of the fittest (Spencer’s term). • Notice that fitness is really only defined here in terms of a better rate of survival and breeding, nothing else • Later he made the case that humans too were products of evolution. • Darwin delayed the publication of his theory for 20 years—he knew how controversial it would be. • Explains numerous phenomena: • Convergent evolution: fish have fins and so do aquatic mammals; flying fish, butterflies, and birds all evolved wings. • Parallel evolution: Similar quill structure of old and new world porcupines • Vestigial traits: Male nipples, whale pelvis and limbs • Common traits with different structure, such as the bone structure in limbs, all suggest a common ancestor • Explains why domestic selection works: • E.g. Dog and farm animal breeding • Explains mutation of form in organisms: • E.g. The flu virus, the decay in the effectiveness of antibiotics, hospital superbugs • Presaged genetic theory Did Darwin Get Every Detail Right? • No, new details have been uncovered that Darwin failed to anticipate: • Gradualism amended, circumstances have arisen that indicate the possibility for very rapid evolutionary change. • E.g., the flu virus, Finch beaks • Punctuated equilibrium (S. J. Gould) • DNA may support multiple potential phenotypes • However, no additions contradict the the essentials of the theory: Adaptation via morphological change. • They only broadened its scope and its explanatory role.


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