Mixed Race Studies

Why Barack Obama Is Black: A Cognitive Account of Hypodescent

Psychological Science
Volume 22, Number 1 (January 2011)
pages 29-33
DOI: 10.1177/0956797610390383

Jamin Halberstadt, Associate Professor of Psychology
University of Otago

Steven J. Sherman, Chancellor’s Professor of Psychological and Brain Sciences
Indiana University, Bloomington

Jeffrey W. Sherman, Professor of Psychology
University of California, Davis

We propose that hypodescent—the assignment of mixed-race individuals to a minority group—is an emergent feature of basic cognitive processes of learning and categorization. According to attention theory, minority groups are learned by attending to the features that distinguish them from previously learned majority groups. Selective attention creates a strong association between minority groups and their distinctive features, producing a tendency to see individuals who possess a mixture of majority- and minority-group traits as minority-group members. Two experiments on face categorization, using both naturally occurring and manipulated minority groups, support this view, suggesting that hypodescent need not be the product of racist or political motivations, but can be sufficiently explained by an individual’s learning history.

Read or purchase the article here.

Another Woolly-Hair Mutation in Man

The Journal of Heredity
Volume 25, Number 9 (September 1934)
pages 337-340

C. Ph. Schokking
Rotterdam, Holland

A Dutch peasant family living near Leiden carries a dominant gene for a type of woolly hair characteristic of the Negro races. This is not to be explained as due to race crossing for two reasons.  In the first place there is no tradition in the family of an infusion of Negro blood and no other evidence of anything but pure Dutch ancestry. Furthermore, hair form behaves in racial crosses not as a simple dominant character but as a “blending” character (in which to or more genes are involved).  Thus simple mendelian inheritance of hair form is not found in Negro-white crosses. Among such hybrids various degrees of curly and wavy hair are observed, and in later generations wooly hare may appear but only where both parents are partly Negro. Thus the occurrence of woolly hair in this family is clear due to mutation rather than race hybridization.

While studying twins in Leiden in 1929 and 1930, I encountered a pair of non-identical twin sisters, one of whom had remarkably curly hair. Since little is known of the inheritance of such genuine woolly hair among Europeans, I followed up the history of this pair. It soon transpired that in the village of Rijnsburg, near Leiden, whence the girls came, many woolly-haired persons were to be found, and that all of these belonged to the same family. After a deal of effort I was able to put together a pedigree chart covering five generations (Figure 3). The founder of the family had already died and no photograph of him was to be had, but an old Rijnsburger, who knew both this man and his father, was able to give me definite information that both of them had woolly hair…

Read the entire article here.

The Skin Color of Children from White By Near-White Marriages

The Journal of Heredity
Volume 38, Number 8 (August 1947)
pages 233-234

Curt Stern (1902-1981), Professor of Zoology and Genetics [Read a biographical memoir by James V. Neel here.]
University of California, Berkeley

It is well known that the inheritance of color differences in negro-white crosses is based on multiple genes, as first postulated by Gertrude C. and Charles B. Davenport in 1910. Most textbooks present the specific hypothesis first proposed by Davenport  that two pairs of genes are involved which act cumulatively and with intermediate effects in heterozygotes, so that negro pigmentation may be symbolized by AABB, white by aabb and various shades of diverse hybrid pigmentation by AABb, and AaBB (dark mulatto) AAbb, aaBB, and AaBb (mulatto), and aaBb and Aabb (light mulatto). In a general way this hypothesis fits the data on negro-white hybrids collected by Davenport. Undoubtedly, however, it is at best only a first approximation. Pigmentation is greatly variable in either whites or negroes. While it is known that much of this variability is inherited, little information is available as to the specific genetic conditions underlying the degrees and types of pigmentation found in either group. Correspondingly limited is our knowledge of the interaction of the “minor” genes for pigment variability with each other and with the “major” ones in negro-white crosses.

Read the entire article here.

Arnold K. Ho & Dr. Jim Sidanius to be Featured Guests on Mixed Chicks Chat

Mixed Chicks Chat (The only live weekly show about being racially and culturally mixed. Also, founders of the Mixed Roots Film & Literary Festival) Hosted by Fanshen Cox and Heidi W. Durrow
Website: TalkShoe™ (Keywords: Mixed Chicks)
Episode: #188 – Arnold K. Ho & Dr. Jim Sidanius
When: Wednesday, 2011-01-12, 22:00Z (17:00 EST, 16:00 CST, 14:00 PST)

Arnold K. Ho
Department of Psychology
Harvard University

Jim Sidanius, Professor of Psychology and African and African American Studies
Harvard University

Jim Sidanius is a Professor in the departments of Psychology and African and African American Studies at Harvard University. He has published more than 150 scientific papers and books discussing the political psychology of gender, group conflict, institutional discrimination and the evolutionary psychology of intergroup prejudice.

Arnold K. Ho is interested in social perceptions, attitudes, and beliefs that function to maintain social hierarchies.  In one line of research, he examines the perception of multiracial individuals and its implications for racial hierarchies.  In another line of research, he examines hierarchy enhancing attitudes and beliefs and individual differences in the preference for group-based hierarchy (i.e., social dominance orientation).

Selected Bibliography:

• “Evidence for hypodescent and racial hierarchy in the categorization and perception of biracial individuals,” Journal of Personality and Social Psychology, (2011), DOI: 10.1037/a0021562.

Listen to the episode here.