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Heritability





Encyclopedia results for Heritability

  1. Heritability

    Refimprove date October 2010 File Critique of the Theory of Evolution Fig 076.jpg thumb right 160px Heritability ... as asking how much genetics influences height in any one person. The Heritability of a population ... consequences. DOI 10.1016 j.cell.2008.09.050 PMID 18957198 ref . Heritability thus analyzes the relative ... in a population. For instance, some humans in a population are taller than others heritability .... Heritability is measured by estimating the relative contributions of genetic and non genetic differences to the total phenotypic variation in a population. Heritability is an important concept in quantitative ... study twin studies , but is less widely used in population genetics . Heritability measures the fraction ... that this fraction of an individual phenotype is caused by genetics. In addition, heritability ... intelligence. Heritability could increase if genetic variation increases, causing individuals ..., heritability might also increase if the environmental variation decreases , causing individuals to show less phenotypic variation e.g. to show more similar levels of intelligence . Heritability is increasing ... less variation what matters is the relative contribution. Here we see why heritability is specific ... on environment can also be function of the genes involved. Matters of heritability are complicated ... through a mechanism called phenotypic plasticity , which makes heritability difficult to measure ... of low heritability a population with genotypes coding for only one hair colour File Crowd at Mona Lisa.jpg thumb left 250px A crowd with variance in hair colour. Estimates of heritability use statistical analyses to help to identify the causes of differences between individuals. Because heritability ... in a population. Heritability can be univariate examining a single trait or multivariate examining ... and genetics may also interact, and heritability analyses can test for and examine these interactions GxE models . A prerequisite for heritability analyses is that there is some population variation ...   more details



  1. Heritability of IQ

    Human intelligence The study of the heritability of IQ investigates the relative importance of genetics and environment for phenotypic variation in intelligence quotient IQ in a population. Heritability ... heritability estimates long past their sell by date journal Int J Epidemiol volume 35 issue 3 pages ... in the academic community about the heritability of IQ ever since research began in the 19th ... ref Estimates in the academic research of the heritability of IQ have varied from below 0.5 ... name kirp Heritability and caveats Main Heritability Heritability is defined as the proportion of variance .... ref name rose Heritability takes a value ranging from 0 to 1 a heritability of 1 indicates that all variation in the trait in question is genetic in origin and a heritability of 0 indicates ... height has a heritability estimated at 0.80 when looking only at the height variation within families ... SE, Ferreira MA, et al. title Assumption Free Estimation of Heritability from Genome Wide Identity ... study on the heritability of depression in men calculated it as 0.29, while it was 0.42 for women in the same ... of points to consider when interpreting heritability Heritability measures the proportion of variation ... equally, the mean value of the trait will change without any change in its heritability ... evidently happened for height the heritability of stature is high, but average heights continue to increase. ref name unknown Thus, even in developed nations, a high heritability of a trait does ..., so heritability has little if anything to do with controllability. ref name JohnsonBouchard2009 cite ... title Beyond Heritability Twin Studies in Behavioral Research journal Current Directions in Psychological ... of heritability ref ref Gottfredson. L. S. 2007 . Flynn, Ceci, and Turkheimer on race and intelligence Opening moves. Cato Unbound, November 26. ref ref name RJ2010 A common error is to assume that a heritability figure is necessarily unchangeable. The value of heritability can change if the impact ...   more details



  1. Heritability of autism

    The heritability of autism is the proportion of autism that can be explained by genetic variation if the heritability of a condition is high, then the condition is considered to be primarily genetic. Autism has a strong genetic basis, although the genetics of autism is complex and it is unclear whether autism spectrum disorder ASD is explained more by multigene interactions or by rare mutation s with major effects. ref vcite journal journal Nat Rev Genet year 2008 volume 9 issue 5 pages 341 55 title Advances in autism genetics on the threshold of a new neurobiology author Abrahams BS, Geschwind DH doi 10.1038 nrg2346 pmid 18414403 pmc 2756414 ref Early Twin study studies of twins estimated the heritability of autism to be more than 90 in other words, that 90 of the differences between autistic and non autistic individuals is due to genetic effects. ref name Freitag This may be an overestimate new twin data and models with structural genetic variation are needed. ref name Sykes When only one identical twin is autistic, the other often has learning or social disabilities. For adult siblings, the risk of having one or more features of the broader autism phenotype might be as high as 30 ... Twin studies are a helpful tool in determining the heritability of disorders and human traits in general ... doi ref Identical twin studies put autism s heritability in a range between 36 and 95.7 , with concordance ... population. Notable twin studies have attempted to shed light on the heritability of autism. A small scale study in 1977 was the first of its kind to look into the heritability of autism. It involved ... , and a heritability of 0.68 with higher genetic influence in younger twins. ref vcite journal author Scourfield J, Martin N, Lewis G, McGuffin P title Heritability of social cognitive skills in children ... heritability for autistic traits in a large group of 3,400 pairs of twins. ref vcite journal author ... multiple allelic variants of HOXA1 in particular may provide useful insights into the heritability ...   more details



  1. Missing heritability problem

    The missing heritability problem can be defined as the fact that individual genes cannot account for much of a disease s heritability . This is a problem that has significant implications for medicine, since a person s susceptible individual susceptibility to disease may depend more on the combined effect of all the genes in the background than on the disease genes in the foreground . A model has been introduced that takes into account epigenetic inheritance on the risk and recurrence risk of a complex disease. ref name doi.10.1534 genetics.109.102798 cite journal last Slatkin first M. title Epigenetic Inheritance and the Missing Heritability Problem journal Genetics date 4 May 2009 volume 182 issue 3 pages 845 850 doi 10.1534 genetics.109.102798 ref The limiting pathway LP model has been introduced in which a trait biology trait depends on the value of k inputs that can have rate limitations due to stoichiometry stoichiometric ratios , reactants required in a biochemical pathway, or proteins required for transcription of a gene. Each of these k inputs is a strictly additive trait that depends on a set of common or rare variants . When k 1, the LP model is simply a standard additive trait. ref name pmid.22223662 cite journal last Zuk first O coauthors Hechter, E, Sunyaev, SR, Lander, ES title The mystery of missing heritability Genetic interactions create phantom heritability. journal Proceedings of the National Academy of Sciences of the United States of America date 2012 Jan 24 volume 109 issue 4 pages 1193 8 pmid 22223662 ref References Reflist Category Genetics ...   more details



  1. Neven Sesardi?

    , philosophy of mind ref name JL notable ideas Heritability influences Charles Darwin , Stephen ..., Genetics and Psychology, Philosophy and Environmental Issues, and Ethics . Work Heritability and Causality In his first article, Heritability and Causality Sesardic 1993 , Sesardic argues that the environmentalist ... 1993 396 They reject the idea that heritability estimates could lead to genetic explanations by pointing ... correlation . Philosophy of Science that Ignores Science Race, IQ and Heritability In his article Philosophy of Science that Ignores Science Race, IQ and Heritability Sesardic argues that the rejection of most philosophers of the connection between the heritability of Race classification of human ... complex issues debated in science . Heritability and Indirect Causation In his 2003 article, Heritability and Indirect Causation Sesardic argues that in spite of the possibility of genetic effects being changed by the environmental influences, heritability can still provide a well founded ... by scientists and philosophers to argue that heritability is not a very helpful causal or explanatory ... ref Publications Books Making Sense of Heritability, Cambridge Cambridge University Press, 2005. ISBN ... of Knowledge at the Turn of the Century, Stanford Stanford University Press, 2004, 109 120. Heritability .... Philosophy of Science that Ignores Science Race, IQ and Heritability , Philosophy of Science 67 2000 ... Work on Human Altruism and Evolution , Ethics 106 1995 , pp.  328 357. Heritability and Causality ... that far from being so semantically perverse, the term heritability , when properly understood, actually accords quite well with our common sense etiological ascriptions. Heritability and Indirect ...   more details



  1. Falconer's formula

    Falconer s formula is used in Twin study twin studies to determine the Genetics genetic heritability of a trait biology trait based on the difference between twin correlation s. The formula is h sub b sub sup 2 sup 2 r sub mz sub r sub dz sub , where h sub b sub sup 2 sup is the broad sense heritability, r sub mz sub is the monozygotic, MZ identical twin correlation, and r sub dz sub is the dizygotic, DZ fraternal twin correlation. The correlation of same sex MZ twins is always higher than the DZ twin correlation with various sexes and thus all gender differences are evaluated as heritable. To avoid this error, only genetic studies comparing MZ twins with the same sex DZ twins are valid. Or correlation between A h sub b sub sup 2 sup additive genetics and C common environment must be included in derivation r sub mz sub A C 2 Corr A , C r sub dz sub A C 2 Corr A , C and can not be neglected also as covariance in the statistical model . It is also possible to do narrow sense heritability estimates by using sibling adoptee correlations h sub n sub sup 2 sup r sub sib sub r sub ad sub , where h sub n sub sup 2 sup is the narrow sense heritability, r sub sib sub is the sibling correlation, and r sub ad sub is the adoptee correlation. References Falconer, DS, MacKay TFC. Introduction to Quantitative Genetics, 4th Ed. 1996. Longmans Green, Harlow, Essex, UK. See also Douglas Scott Falconer Quantitative genetics Category Genetics Category Statistical genetics genetics stub statistics stub ...   more details



  1. Midparent

    Unreferenced stub auto yes date December 2009 Orphan date November 2006 Studying quantitative traits in heritability heritability studies may be complicated by Sexual dimorphism sex differences observed for the trait. The midparent value is defined as the average of the trait value of father and mother. This value can be used in the study to analyze the data set without heeding sex effects. Well known examples include studies of stature height which is given by math height midparent frac 1 2 height father 1.08 times height mother math 1 The coefficient 1.08 serves as a Scale factor scaling factor . After the 1.08 scaling, the mean of the mother s height is the same as that of the father s. And the variance is closer to father s. In this way, sex difference can be ignored. Category Genetics Biology stub no Midtforeldreh yde 1. Vogel, F. & Motulsky, A. G. 1997 Human Genetics Problems and Approaches. Springer, 878, P207. ...   more details



  1. Odal

    Mergefrom Ethel date January 2010 Odal o al , Anglo Saxon el , German uodal , adel is a Germanic word which relates to property, heritability or nobility. It can refer to the following Allodium Odelsrett , a traditional Scandinavian law Udal law , the Scottish derivative of the Odelsrett Odal rune , a Germanic rune after the rune, the ligature Odal, Norway , a Districts of Norway traditional district in Norway Aetheling Ethel , Aethel , Uodal as an element in Germanic name s Ethel disambiguation Ethel as a given name Au r thelred disambiguation thelred thelhard Adelaide Albert disambiguation Albert Adolf Ulrich Ulmannus disambig ...   more details



  1. R. Travis Osborne

    by Heritability Estimates. Perceptual and Motor Skills 28 1969 535 538. Miele, Frank, and R. Travis Osborne. Racial Differences in Heritability Ratios for Verbal Ability. Homo 24 1973 35 39. Swan ...   more details



  1. Genetic correlation

    . See also Quantitative genetics Heritability References references DEFAULTSORT Genetic Correlation ...   more details



  1. Emil von Dungern

    Baron Emil von Dungern 26 November 1867 &ndash 4 September 1961 was a German internist. Von Dungern was born in W rzburg and died in Ludwigshafen am Bodensee . In 1910 11, E. von Dungern and Ludwik Hirszfeld discovered the heritability of ABO blood group system ABO blood groups . Use dmy dates date January 2012 Persondata name Dungern, Emil Von alternative names short description date of birth 26 November 1867 place of birth date of death 4 September 1961 place of death DEFAULTSORT Dungern, Emil Von Category 1867 births Category 1961 deaths Germany med bio stub de Emil von Dungern ...   more details



  1. Book:Lysenkoism

    saved book title Lysenkoism subtitle An overview cover image Lysenko in field with wheat.jpg cover color Lysenkoism An overview Overview Trofim Lysenko Lysenkoism Soviet policies Bourgeois pseudoscience Collectivization in the Soviet Union Pavlovian session Suppressed research in the Soviet Union Wrecking Soviet crime Wrecking Lysenkoists John Desmond Bernal Nikita Khrushchev Ivan Vladimirovich Michurin Joseph Stalin VASKhNIL Dissidents Wac aw Gajewski Tan Jiazhen Georgii Karpechenko Roy Medvedev Georgii Nadson Nikolai Vavilov Concepts Heredity Heritability Hybrid biology Hybridization Inheritance of acquired characteristics Lamarckism Mendelian inheritance Vernalization Related articles Leninism Marxism Politicization of science ...   more details



  1. Quantitative genetics

    d sub V sub E sub V sub I sub The heritability of a trait is the proportion of the total i.e. phenotypic ... also as the broad sense heritability H sup 2 sup . If only Additive genetic variance V sub A sub is used in the numerator, the heritability is narrow sense h sup 2 sup . The broadsense heritability ... disequlibrium in the trait. Fisher proposed that this narrow sense heritability might be appropriate ... ten versus 25 for heterozygotes and more than 35 for daughters . Heritability and repeatability Heritability in the broad sense H 2 measures the total genetic influence on phenotype. It takes into account additive genetics, dominance, and epistatic genetic effects. The more specific measure of heritability ... phenotype. Low heritability leads to higher environmental influence, while high heritability can lead to more rapid genetic progress. Typically, heritability of reproductive traits is low, disease resistance and production are moderately low to moderate, and conformation is high. Heritability can be calculated ... value. Generally, repeatability indicates the upper level of the heritability. Repeatability ... distance Heritability Population genetics , built on some of the same principles as quantitative genetics ...   more details



  1. Progeny testing

    refimprove date February 2008 Progeny Testing is a test of the value for selective breeding of an individual s genotype by looking at the progeny produced by different matings. ref http www.everythingbio.com glos definition.php?word progeny testing progeny testing Definition Bot generated title ref Progeny Testing It is used in the breeding in the wild breeding of both plant s and animal s, but is most commercially important in animal breeding to determine the value of an animal in terms of the sex limited characters of its offspring, for example milk or egg production in females. A bull for example cannot be assessed for milk production, however the performance of its female offspring can be used to determine the use of the animal for future crosses, provided of course the character has a high heritability . A progeny test is performed by mating the male with a number of females with proven performance. The average performance of the offspring is then found, giving a measure of the male s respective value to the breeder. References references External links http www.dpi.nsw.gov.au agriculture livestock beef breeding breedplan bull buy Breedplan and bull buying Category Agriculture Agri stub Genetics stub ...   more details



  1. C3orf58

    Orphan date February 2009 protein name chromosome 3 open reading frame 58 caption image width HGNCid 28490 Symbol C3orf58 AltSymbols EntrezGene 205428 OMIM RefSeq NM 173552 UniProt PDB ECnumber Chromosome 3 Arm q Band 24 LocusSupplementaryData C3orf58 is a human gene. It was highlighted in a screen for genes possibly related to autism. The authors propose that the gene should be renamed Deleted in autism 1 DIA1 . Experiments in a rat neuronal cell culture model suggested that this gene may be regulated directly or indirectly by Mef2 MEF2 site binding proteins. ref cite journal author Morrow EM, Yoo SY, Flavell SW, et al. title Identifying Autism Loci and Genes by Tracing Recent Shared Ancestry. journal Science volume 321 issue 5886 pages 218 223 year 2008 pmid 18621663 doi 10.1126 science.1157657 pmc 2586171 ref See also Heritability of autism References reflist ...   more details



  1. Inspection time

    Inspection time is moderately heritability heritable . ref name luciano This work on the heritability ...   more details



  1. Nature versus nurture

    , behavioral geneticists generally refer to the heritability of a trait. With regard to personality ... x271j1542j02r4v0 accessdate 2009 04 14 ref Heritability estimates main Heritability File Sibling ..., but little heritability i.e. high shared environmental variance c sup 2 sup low heritability h sup 2 sup . Trait B shows a high heritability since correlation of trait rises sharply with degree of genetic similarity. Trait C shows low heritability, but also low correlations generally this means ... heritability refers only to the degree of genetic variation between people on a trait. It does ... e.g., certain ranges of temperatures, oxygen levels, etc. . In contrast, the heritability index statistically ... experimentally, heritability can be determined relatively easily. Such experiments would be unethical ... ref Yet heritability may differ in other circumstances, for instance environmental deprivation. ref ... modifies heritability of IQ in young children. Psychological Science , 14 , http dx.doi.org 623 628 ref Examples of low, medium, and high heritability traits include center class wikitable style width 60 Low heritability Medium heritability High heritability align center Specific language align center ... effects in the case of adoption studies. Interaction of genes and environment Heritability refers ... SNPs explain a large proportion of the heritability for human height. Nature Genetics , 42 , http ... event long before the disease will manifest itself. File Genes x environment heritability two buckets view diagram.svg 200px thumbnail right The two buckets view of heritability. File Genes x environment heritability homogenous mudpie view diagram.svg 200px thumbnail right More realistic homogenous mudpie view of heritability. Steven Pinker 2004 likewise described several examples concrete behavioral ... by a complex interaction of genotype and environment it is possible to measure the heritability of a trait ... percentage heritability imagine non interactional, additive contributions of genes and environment ...   more details



  1. Twin study

    e.g. Heritability of IQ intelligence quotient and some more complex heritability heritabilities , with evidence for different genes affecting different aspects of the trait as in the case of Heritability ... to genetic effects heritability , and how much appears to be due to shared or unique environmental ... in current research. An example structural model for the heritability of height is shown below ..., T. D. Spector, M. A. Stazi, G. Willemsen and J. Kaprio. 2003 . Heritability of adult body height ..., essentially creating a continuum of genetic similarity or twinness within families. Estimates of heritability ..., therefore, that the heritability estimates from twin designs represent a first step in understanding ... weaknesses and sources of practical error the heritability of those pathological phenomena at the focus ... argue that heritability estimates used for most twin studies rest on restrictive assumptions which ..., Peter Schonemann has criticized methods for estimating heritability developed in the 1970s. He has also argued that the heritability estimate from a twin study may reflect factors other than shared genes ... of 850 sets of twins. Austin, TX University of Texas Press . ref the narrow heritability s of HR of responses ... heritable for males and 103 for females ref Peter Schonemann 1997 Models and muddles of heritability ... equation modeling are not subject to the limitations and heritability estimates such as those noted ... environments. ref Kempthorne O. 1997 . Heritability uses and abuses. Genetica, Volume 99, Numbers ... in different environments. ref S. A. Petrill and K. Deater Deckard. 2004 . The heritability of general ... heritability. Response to correlation criticism Modern twin modeling rarely pools the three types ... Heritability Heritability of IQ Human nature Identical Strangers Identical Strangers A Memoir ..., R.R., Angleitner, A. Riemann, R. & Livesley, W.J. 1998 . Heritability of facet level traits in a cross ... and muddles of heritability. Genetica, 99, 97 108 http www2.psych.purdue.edu phs pdf 81.pdf ...   more details



  1. Peter Schönemann

    Measurement and the Heritability chapter in Encyclopedia of Human Intelligence . ref Peter H. Sch nemann 1994 . Heritability. In R Sternberg Ed. , Encyclopedia of Human Intelligence. New York ... that the statistical heritability estimates used in most twin studies rest on restrictive assumptions ..., P. H. 1994 .Heritability. In R Sternberg Ed. , Encyclopedia of Human Intelligence. New York McMillan ...   more details



  1. Inheritance (disambiguation)

    wiktionarypar inheritance Inheritance may refer to Inheritance , transferring property and debt upon death to a beneficiary Literature Inheritance Warhammer novel Inheritance Warhammer novel , by Steven Savile Inheritance novel , a fantasy novel by Christopher Paolini, last part of the Inheritance Cycle . The Inheritance Dragonlance novels The Inheritance Dragonlance novels Inheritance , novel by Phyllis Bentley Inheritance short story , by Arthur C. Clarke Inheritance , a play by Hannie Rayson Film The Inheritance, 1978, directed by Mauro Bolognini Inheritance 2003 film Inheritance 2003 film aka Arven , by Per Fly Inheritance 2001 film , by Paula Hern ndez Inheritance TV series Inheritance TV series Inheritance Star Trek The Next Generation Inheritance STTNG episode The Inheritance Lassie episode The Inheritance Lassie episode Science and technology Inheritance genetic algorithm Inheritance computer science See also Biological inheritance & Heritability Inheritor disambiguation disambig br H rezh dishe velout ca Her ncia desambiguaci cy Etifeddiaeth gwahaniaethu de Vererbung es Herencia eo Heredo fr H ritage he no Arv nn Arv fleirtyding ru simple Inheritance disambiguation tr Miras anlam ayr m ...   more details



  1. Nikolay Dubinin

    Unreferenced stub auto yes date December 2009 Nikolay Petrovich Dubinin January 4, 1907  March 26, 1998 was a USSR Soviet and Russia n biology biologist and academic ian. He was a Corresponding Member of the Division of Biological Sciences from 1946 and Academician of the Division of the General Biology from 1966. He was a founding member of the Institute of Cytology and Genetics IC&G in the Russian Academy of Sciences . During the two years of his directorship 1957 1959 Dubinin worked out research goals at the IC&G and assembled its early staff. Dmitry Konstantinovich Belyaev Dmitri Belyaev was director of the IC&G from 1959 1985. He made significant contributions to the establishment of the IC&G and made efforts in the restoration and advancement of genetics in the USSR . In 1982, Dubinin and Belyayev studied the genetic basis of the human individuality in different populations. In 1983, they worked with Trubnikov in studying variability and heritability neuro and psychodynamic parameters. In 2002 the Genetic Consequences of Emergency Radiation Situations conference was dedicated to him. Persondata Metadata see Wikipedia Persondata . NAME Dubinin, Nikolay ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH January 4, 1907 PLACE OF BIRTH DATE OF DEATH March 26, 1998 PLACE OF DEATH DEFAULTSORT Dubinin, Nikolay Category 1907 births Category 1998 deaths Category Russian biologists Category Soviet biologists Category Members of the Russian Academy of Sciences Category People from Vladivostok Russia scientist stub ru , ...   more details



  1. ADE model

    An ADE model is a genetic model for twin studies which includes Dominance genetics dominance genetic effects. ref cite journal author Locatelli I et al. title The heritability of breast cancer a Bayesian correlated frailty model applied to Swedish twins data journal Twin Research volume 7 issue 2 pages 182 191 year 2004 pmid 15169603 doi 10.1375 136905204323016168 ref Biometrics Biometrical genetic modeling of twin or other family data can be used to decompose the variance of an observed response or phenotype into genetics genetic and Environment biophysical environmental components. Convenient parametrization s requiring few random effects allow such models to be estimated using widely available software for linear mixed model s continuous phenotypes or generalized linear mixed model s categorical phenotypes . A stands for additive genetic effects , D for non additive genetic or dominance effects, and E for nonshared environment effects. ref Douglas A. Raynor et al . 2002 . Covariation of Psychosocial Characteristics Associated With Cardiovascular Disease Genetic and Environmental Influences . ref References reflist DEFAULTSORT Ade Model Category Twins genetics stub ...   more details



  1. Manhattan plot

    File Manhattan Plot.png thumb 300px An illustration of a Manhattan plot depicting several strongly associated risk loci A Manhattan plot is a type of scatter plot , usually used to display data with a large number of data points many of non zero amplitude, and with a distribution of higher magnitude values, for instance in Genome wide association study genome wide association studies GWAS . ref name East cite journal pmid 20581876 doi 10.1038 ng0710 558 year 2010 last1 Gibson first1 Greg title Hints of hidden heritability in GWAS volume 42 pages 558 560 journal Nature Genetics issue 7 ref In GWAS Manhattan plots, genomic coordinates are displayed along the X axis, with the negative logarithm of the association P value for each single nucleotide polymorphism displayed on the Y axis. Because the strongest associations have the smallest P values e.g., 10 sup 15 sup , their negative logarithms will be the greatest e.g., 15 . It gains its name from the similarity of such a plot to the Manhattan skyline a profile of skyscrapers towering above the lower level buildings which vary around a lower height. References Reflist Category Statistical charts and diagrams Category Genetic epidemiology Category Bioinformatics statistics stub ...   more details



  1. Spearman's hypothesis

    Closely related to Spearman s hypothesis is the relationship between how high heritability a test has and how large the racial gaps are for that test. The degree of heritability can be estimated by, for example ... the degree of heritability and magnitude of racial gaps for several tests. J. Philippe Rushton Rushton ... and workplace performance, heritability estimates determined from twin study twin studies , inbreeding ..., the supposed confirmation of Spearman s hypothesis, and the similar relationship for heritability ... and South Africa for black white IQ gaps and in Serbia for Romani white IQ gaps. They also argue that the heritability ... have higher heritability. Thus, also only environmentally caused group differences would cause the gaps ...   more details



  1. Leon Kamin

    Deleted image removed Image Leon Kamin.jpg right thumb 175px Leon Kamin Leon J. Kamin born December 29, 1927 in Taunton, Massachusetts is an United States American psychologist who chaired Princeton University s Princeton University Department of Psychology Department of Psychology in 1968. He later served as Chair of the Psychology Department at Northeastern University in Boston, MA. Kamin s initial contribution to psychology came from his research and documentation of the blocking effect 1969 . He demonstrated that an animal is blocked from associating a stimulus say, a Bell instrument bell with result say, food , if the stimulus is presented simultaneously with another stimulus that the animal already associates with the result. If the dog already associates the whistle with food, then sounding the whistle and ringing a bell when you give it food will not teach it to associate the bell with food. The blocking effect is one of the hallmark effects in the study of associative learning in humans and animals. Kamin has long opposed the idea that significant personal traits are largely heritable. He became skeptical of the claims of Cyril Burt regarding the heritability of IQ , and published his findings in a 1974 book The Science and Politics of IQ . He co authored the controversial book Not in Our Genes 1984 with geneticist Dick Lewontin Richard Lewontin and neurobiologist Steven Rose . This book, championing the radical science movement, attacked sociobiology and evolutionary psychology . Kamin is known in some circles for his position that the IQ Genetics vs environment heritability of IQ could be zero Mackintosh, 1998 He is honorary professor of psychology at the University of Cape Town in South Africa . Bibliography 1974 The Science and Politics of IQ Cite book author Hans J rgen Eysenck and Leon J. Kamin title Intelligence the battle for the mind publisher Macmillan Publishers MacMillan year 1981 isbn 0 33026399 4 Cite book author Richard Lewontin , Steven Rose ...   more details




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