Harris, a former textbook author turned popular writer, dives right in, sharpening her focus by looking at identical twins. After subtracting the share contributed by their mutual genesabout 45 percentstudies show that adult identical twins are no more alike in personality than people plucked at random from a crowd, even though the siblings were raised in the same home, by the same parents, with identical schooling.
Where, then, do personality differences come from? Harris begins, in a savage fashion familiar to readers of her Nurture Assumption, by recounting factors that do not contribute to personality differences. She debunks dozens of studies by psychologistsespecially the "developmentalists" and "interventionists" who believe that better parenting or school environments can affect how children turn outby pointing out where they have fudged numbers and twisted results. She rejects the basis of psychoanalysis, stating there is no evidence that talking about childhood experiences has therapeutic value. She also maintains that learned behaviors do not readily transfer from one situation to another, noting that even babies behave differently to fit different environments.
To answer her opening questions, Harris then develops a complex scheme based on "the modular mind," a framework set forth by Harvard University evolutionary psychologist Steven Pinker and others. (Harris herself has no doctorate and is housebound by systemic sclerosis and lupus, two autoimmune disorders.) She describes three modulesthe relationship system, the socialization system and the status systemand explains how each contributes its part to making us who we are. The relationship system starts in the cradle as infants study and learn the faces and voices of the people around them, collecting information that helps form personality. The socialization system adapts people to their culture. The status system takes all the information collected during childhood and adolescence and shapes and modifies our personalities in accord with our environments.
Harriss last chapter lays out her theory in tabular form, explaining how each module interacts with the others to produce our distinct personalities. It is lavishly footnoted, like the rest of the book, shoring up her strategy of pointing out the failings of other models and then proposing her own. Her goal, she writes, is to explain the variations in personality that cannot be attributed to variations in peoples genes. After saying she believes she has succeeded, she throws down her gauntlet: "I will leave it to other people to test my theory."
Jonathan Beard --This text refers to an out of print or unavailable edition of this title.
Not convinced by the authors premise that most personalities, behaviors and preferences are genetically based. Read morePublished 4 months ago by Cristina
Being something of an iconoclast myself, I enjoyed Harris's outsider's approach to her subject. Not being a member of the academe, she is good at detecting problems in accepted... Read morePublished 4 months ago by William H. DuBay
Great reading. She spends a little too much time responding to critics of her other book: "Nurture Assumption."Published 6 months ago by Political Enthusiast
This book would be enough to make a name for Judith Harris - even if nowhere as significant as her seminal work "The Nurture Assumption: Why Children Turn Out the Way They... Read morePublished 19 months ago by Michael K
I ordered this book for school, it was very informative regarding determinism and biology. I would recommend it for anyone interested in biological determinism.Published 23 months ago by Marc Richard Adams
While the author is extremely knowledgeable about this topic, I found her writing style extremely laborious and too wordy. Read morePublished on May 9, 2013 by Lisa Cunningham
In this, a sequel to her previous book 'The Nature Assumption,' Ms Harris expands on her theories about childhood behavioral development. Read morePublished on January 6, 2013 by Eugene A Jewett
I don't have time to write a full review, so I'll just say that Harris's thinking is one of my crucial touchstones when thinking about human nature, human development,... Read morePublished on January 20, 2012 by Stephen F. Roth
Since I liked her first book "The Nurture Assumption," I thought this one would also be enlightening, and it was somewhat, but it wasn't nearly as good. Read morePublished on May 31, 2008 by MZ