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Posts

April 23, 2014

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5:50 PM | (Sample) Size Matters
On this blog and others, on twitter (@mwkraus), at conferences, and in the halls of the psychology building at the University of Illinois, I have engaged in a wealth of important discussions about improving research methods in social-personality psychology. Many prominent psychologists have offered several helpful suggestions in this regard.

April 21, 2014

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3:45 AM | Cross-validation in finance, psychology, and political science
A large chunk of machine learning (although not all of it) is concerned with predictive modeling, usually in the form of designing an algorithm that takes in some data set and returns an algorithm (or sometimes, a description of an algorithm) for making predictions based on future data. In terminology more friendly to the philosophy […]

Bailey, D., Borwein, J., de Prado, M.L. & Zhu, Q. (2014). Pseudo-Mathematics and Financial Charlatanism: The Effects of Backtest Overfitting on Out-of-Sample Performance, Notices of the American Mathematical Society, 61 (5) 458. DOI:

Citation

April 19, 2014

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9:30 PM | The nose knows: How to pick your friends
We all have that friend. Let's call her Jane. Jane is bubbly and gregarious. Jane doesn't attend a party, she manifests it. She seeks out social gatherings and is enlivened by human presence. Jane is a good listener and has many trusted friends. What can explain Jane's extroversion? The answer, astonishingly, is her attraction to human body odor. 

Lübke, K., Croy, I., Hoenen, M., Gerber, J., Pause, B. & Hummel, T. (2014). Does Human Body Odor Represent a Significant and Rewarding Social Signal to Individuals High in Social Openness?, PLoS ONE, 9 (4) DOI:

Citation

April 18, 2014

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2:03 PM | Study suggests some fathers elevate their games
As parents, we all take cues from mom and dad […]
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2:00 PM | The Cournot model of oligopoly. A success story
Economic models of perfect competition and of monopoly only need to include individual behavior that takes the environment as given. In the case of […] Read more The post The Cournot model of oligopoly. A success story appeared first on Mapping Ignorance. Related posts:Experimenting with markets Modeling diversity in Macroeconomics Experiments in fairness

Ferreira J.L. (2014). Capacity precommitment, price competition and forward markets, Economics Letters, 122 (2) 362-364. DOI:

Citation

April 17, 2014

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2:00 PM | Is It Good For Kids To Have A Pet?
People overwhelmingly believe that having pets is overall a good thing for children. Indeed, a 2003 paper by developmental psychologist Gail F. Melson reports that most parents say that they acquired... -- Read more on ScientificAmerican.com

Mueller M.K. (2014). Is Human-Animal Interaction (HAI) Linked to Positive Youth Development? Initial Answers, Applied Developmental Science, 18 (1) 5-16. DOI:

Citation

April 14, 2014

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5:10 PM | Does Access to Birth Control Reduce Poverty?
In American politics the proliferation of birth control is important because of how it affects the eternal resting place of our immortal souls. But believe it or not, there are also non-metaphysical policy consequences to increasing access to birth control. A new study by a pair of economists — Stephanie Browne of J.P. Morgan and […]

Browne, S. & LaLumia, S. (2014). The Effects of Contraception on Female Poverty, Journal of Policy Analysis and Management, DOI:

Citation
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3:45 AM | Big data, prediction, and scientism in the social sciences
Much of my undergrad was spent studying physics, and although I still think that a physics background is great for a theorists in any field, there are some downsides. For example, I used to make jokes like: “soft isn’t the opposite of hard sciences, easy is.” Thankfully, over the years I have started to slowly […]

Lazer, D., Kennedy, R., King, G. & Vespignani, A. (2014). Big data. The parable of Google Flu: traps in big data analysis., Science, 343 (6176) 1203-1205. PMID:

Citation
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3:45 AM | Big data, prediction, and scientism in the social sciences
Much of my undergrad was spent studying physics, and although I still think that a physics background is great for a theorists in any field, there are some downsides. For example, I used to make jokes like: “soft isn’t the opposite of hard sciences, easy is.” Thankfully, over the years I have started to slowly […]

Lazer, D., Kennedy, R., King, G. & Vespignani, A. (2014). Big data. The parable of Google Flu: traps in big data analysis., Science, 343 (6176) 1203-1205. PMID:

Citation

April 12, 2014

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10:03 AM | How eating several smaller sized chocolates makes you look greedy and impulsive: the unit size effect of indulgent food
Imagine you are offered a package full of delicious chocolates. Would the size of the pieces of chocolate influences how much you eat? Yes, the size of your piece of chocolate matters. This so-called unit size of food refers to the number of units in which a portion of food is divided. Earlier studies have shown that smaller units typically lead people to eat less. For example, Wansink and colleagues found that people being given four 100-calorie packs of crackers ate about 25% […]

van Kleef E., Kavvouris C. & van Trijp H.C.M. (2014). The unit size effect of indulgent food: How eating smaller-sized items signals impulsivity and makes consumers eat less, Psychology & Health, 1-41. DOI:

Citation

April 07, 2014

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4:42 PM | The Limits to Explanatory Journalism
In recent years, as I have paid closer attention to how our individual biases influence the way we think about everything from climate change to gun control, I have periodically been overcome with a sense of futility. I blame Dan Kahan for this. His research at Yale, along with the pioneering work of Nobel Laureate Daniel […]The post The Limits to Explanatory Journalism appeared first on Collide-a-Scape.

April 06, 2014

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1:37 AM | Blue Brain Red Brain: Science predicts political preference
Which way does your moral compass point? When you read the news and suddenly feel a sense of injustice. Or outrage. Or more rarely, objectivity? When you write a check supporting the party of your choice. When you confidently select a box come election time. Why do you feel so strongly you have made the right choice? Science suggests we don’t have much choice, after all.

Kanai, R., Feilden, T., Firth, C. & Rees, G. (2011). Political Orientations Are Correlated with Brain Structure in Young Adults, Current Biology, 21 (8) 677-680. DOI:

Schreiber, D., Fonzo, G., Simmons, A., Dawes, C., Flagan, T., Fowler, J. & Paulus, M. (2013). Red Brain, Blue Brain: Evaluative Processes Differ in Democrats and Republicans, PLoS ONE, 8 (2) DOI:

Citation
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1:37 AM | Blue Brain Red Brain: Science predicts political preference
Which way does your moral compass point? When you read the news and suddenly feel a sense of injustice. Or outrage. Or more rarely, objectivity? When you write a check supporting the party of your choice. When you confidently select a box come election time. Why do you feel so strongly you have made the right choice? Science suggests we don’t have much choice, after all.

Kanai, R., Feilden, T., Firth, C. & Rees, G. (2011). Political Orientations Are Correlated with Brain Structure in Young Adults, Current Biology, 21 (8) 677-680. DOI:

Schreiber, D., Fonzo, G., Simmons, A., Dawes, C., Flagan, T., Fowler, J. & Paulus, M. (2013). Red Brain, Blue Brain: Evaluative Processes Differ in Democrats and Republicans, PLoS ONE, 8 (2) DOI:

Citation

April 05, 2014

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2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
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2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
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2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
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2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
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2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
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2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
+
2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
+
2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

Citation
+
2:23 PM | The man with 1000 children: the limit of male fertility
By Greg Downey; (long read: 5500 words) Moulay Ismail ibn Sharif succeeded to the sultanate of Morocco after his brother fell from a horse and died in 1672. Twenty-six when he became the Sharifian Emperor, Moulay Ismael “the Bloodthirsty” — …The post The man with 1000 children: the limit of male fertility appeared first on Neuroanthropology.

Betzig L. (1992). Roman polygyny, Ethology and Sociobiology, 13 (5-6) 309-349. DOI:

Confer J.C., Easton J.A., Fleischman D.S., Goetz C.D., Lewis D.M.G., Perilloux C. & Buss D.M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations., American Psychologist, 65 (2) 110-126. DOI:

Cooper T.G., Noonan E., von Eckardstein S., Auger J., Baker H.W.G., Behre H.M., Haugen T.B., Kruger T., Wang C. & Mbizvo M.T. & (2010). World Health Organization reference values for human semen characteristics, Human Reproduction Update, 16 (3) 231-245. DOI:

Einon D. (1998). How Many Children Can One Man Have?, Evolution and Human Behavior, 19 (6) 413-426. DOI:

FREUND M. (1963). Effect of frequency of emission on semen output and an estimate of daily sperm production in man, Reproduction, 6 (2) 269-286. DOI:

Gould R.G. (2000). How many children could Moulay Ismail have had?, Evolution and Human Behavior, 21 (4) 295-296. DOI:

Oberzaucher E., Grammer K. & Szolnoki A. (2014). The Case of Moulay Ismael - Fact or Fancy?, PLoS ONE, 9 (2) e85292. DOI:

Oldereid N.B., Gordeladze J.O., Kirkhus B. & Purvis K. (1984). Human sperm characteristics during frequent ejaculation, Reproduction, 71 (1) 135-140. DOI:

Shackelford T. & Goetz A. (2009). Sexual conflict in humans: evolutionary consequences of asymmetric parental investment and paternity uncertainty, Animal Biology, 59 (4) 449-456. DOI:

Valsa J., Skandhan K.P., Gusani P.H., Sahab Khan P. & Amith S. (2013). Quality of 4-hourly ejaculates - levels of calcium and magnesium, Andrologia, 45 (1) 10-17. DOI:

Woods D.C., Telfer E.E., Tilly J.L. & Barsh G.S. (2012). Oocyte Family Trees: Old Branches or New Stems?, PLoS Genetics, 8 (7) e1002848. DOI:

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April 04, 2014

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2:00 AM | Resonant Brain: How you "feel" music
Foot taps. Head nods. You might smile. Or Cry. You might get goose bumps. You might feel sadness, joy or even reverence. For a second, the face of someone you seldom think about flashes. You close your eyes to get closer. You sing along.  Loudly.  You feel a kinship with the person now staring from the adjoining car. Surely they approve. They do not.  What on Earth is happening to you?  Neurologically, you are having a strong emotional reaction to structured […]

Koelsch S (2014). Brain correlates of music-evoked emotions., Nature reviews. Neuroscience, 15 (3) 170-80. PMID:

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April 03, 2014

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7:26 PM | Are The Mafia Psychopaths?
The view that the Mafia is an organization of especially ruthless psychopaths is wrong – in fact, members of ‘Cosa Nostra’ have lower psychopathic traits than other criminals. That’s according to a new study from Italian researchers Schimmenti and colleagues, who, appropriately enough, are based in Sicily, the Mafia’s birthplace. Schimmenti et al went to […]The post Are The Mafia Psychopaths? appeared first on Neuroskeptic.

Schimmenti, A., Caprì, C., La Barbera, D. & Caretti, V. (2014). Mafia and psychopathy, Criminal Behaviour and Mental Health, DOI:

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April 02, 2014

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4:34 AM | The Connection Between Conspiracy Theories and Ambivalence
It’s a good time to be in the conspiracy theory business, and not just because the birthplace of the U.S. President has been verified only 72 times. Thanks to the internet, it’s easier than ever to track down potentially suspicious information and discuss it with like-minded gumshoes. While certain people may be predisposed to believing in certain kinds […]

van Harreveld, F., Rutjens, B., Schneider, I., Nohlen, H. & Keskinis, K. (2014). In Doubt and Disorderly: Ambivalence Promotes Compensatory Perceptions of Order., Journal of Experimental Psychology: General, DOI:

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April 01, 2014

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9:30 AM | How to protect yourself from Zombie Dolphins without violating the Marine Mammal Protection Act
They rise from the deep with gnashing teeth and hissing blowholes. They stagger through the shallows, hunting for human flesh, piercing the air with their high pitched moan. They are dead but not dead. They are Zombie Dolphins. And you can’t fight them, because they are protected. The Marine Mammal Protection Act is an impressive […]

March 31, 2014

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9:36 PM | Trust the “trust hormone”? Oxytocin can increase deceit
Oxytocin has perhaps the best reputation of any molecule on the planet. In a culture of chemophobia where any compound is fair game for attack, oxytocin has been heralded as “The Source of Love and Prosperity“. If you listen to the tales, this “moral” molecule—the “trust hormone“—is the “most amazing molecule in the world,” and […]The post Trust the “trust hormone”? Oxytocin can increase deceit appeared first on […]

Shalvia S. & De Dreub C. (2014). Oxytocin promotes group-serving dishonesty , PNAS, DOI:

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Editor's Pick
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11:52 AM | Dutch Men are not Nordic Men
There are reasons to appreciate Hanna Rosin’s ‘The End of Men’: it was pleasantly written, contains various entertaining anecdotes, and holds an attractive promise of increased gender equality – although, to trumpet the demise of men (to paraphrase page 285) might be somewhat less desirable. It would have made for a relevant book, were it… Continue Reading

Philip Cohen (2013). The “End of Men” Is Not True: What Is Not and What Might Be on the Road Toward Gender Equality, BOSTON UNIVERSITY LAW REVIEW, 1159-1184. Other: Link

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March 29, 2014

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11:31 AM | Climate sensitivity wrangles don’t change the big picture on emissions
Modelling studies from Joeri Rogelj at the Swiss Federal Institute of Technology, ETH Zurich show we still need to release fewer greenhouse gases even if the world does warm more slowly in response to them than today’s best estimates suggest.

Rogelj, J., Meinshausen, M., Sedláček, J. & Knutti, R. (2014). Implications of potentially lower climate sensitivity on climate projections and policy, Environmental Research Letters, 9 (3) 31003. DOI:

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11:31 AM | Climate sensitivity wrangles don’t change the big picture on emissions
Modelling studies from Joeri Rogelj at the Swiss Federal Institute of Technology, ETH Zurich show we still need to release fewer greenhouse gases even if the world does warm more slowly in response to them than today’s best estimates suggest.

Rogelj, J., Meinshausen, M., Sedláček, J. & Knutti, R. (2014). Implications of potentially lower climate sensitivity on climate projections and policy, Environmental Research Letters, 9 (3) 31003. DOI:

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