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Social and Behavioral Sciences Commons™

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Dartmouth College

2013

Articles 1 - 26 of 26

Full-Text Articles in Social and Behavioral Sciences

Enrichment And Training Improve Cognition In Rats With Cortical Malformations, Kyle R. Jenks, Marcella M. Lucas, Ben A. Duffy, Ashlee A. Robbins, Barjor Gimi, Jeremy M. Barry, Rod C. Scott Dec 2013

Enrichment And Training Improve Cognition In Rats With Cortical Malformations, Kyle R. Jenks, Marcella M. Lucas, Ben A. Duffy, Ashlee A. Robbins, Barjor Gimi, Jeremy M. Barry, Rod C. Scott

Dartmouth Scholarship

Children with malformations of cortical development (MCD) frequently have associated cognitive impairments which reduce quality of life. We hypothesized that cognitive deficits associated with MCD can be improved with environmental manipulation or additional training. The E17 methylazoxymethanol acetate (MAM) exposure model bears many anatomical hallmarks seen in human MCDs as well as similar behavioral and cognitive deficits. We divided control and MAM exposed Sprague-Dawley rats into enriched and non-enriched groups and tested performance in the Morris water maze. Another group similarly divided underwent sociability testing and also underwent Magnetic Resonance Imaging (MRI) scans pre and post enrichment. A third group …

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Balancing The Presentation Of Information And Options In Patient Decision Aids: An Updated Review, Purva Abhyankar, Robert J. Volk, Jennifer Blumenthal-Barby, Paulina Bravo, Angela Buchholz, Elissa Ozanne, Dale C. Vidal, Nananda Col, Peep Stalmeier Nov 2013

Balancing The Presentation Of Information And Options In Patient Decision Aids: An Updated Review, Purva Abhyankar, Robert J. Volk, Jennifer Blumenthal-Barby, Paulina Bravo, Angela Buchholz, Elissa Ozanne, Dale C. Vidal, Nananda Col, Peep Stalmeier

Dartmouth Scholarship

Standards for patient decision aids require that information and options be presented in a balanced manner; this requirement is based on the argument that balanced presentation is essential to foster informed decision making. If information is presented in an incomplete/non-neutral manner, it can stimulate cognitive biases that can unduly affect individuals’ knowledge, perceptions of risks and benefits, and, ultimately, preferences. However, there is little clarity about what constitutes balance, and how it can be determined and enhanced. We conducted a literature review to examine the theoretical and empirical evidence related to balancing the presentation of information and options.

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Socially Excluded Individuals Fail To Recruit Medial Prefrontal Cortex For Negative Social Scenes, Katherine E. Powers, Dylan D. Wagner, Catherine J. Norris, Todd F. Heatherton Nov 2013

Socially Excluded Individuals Fail To Recruit Medial Prefrontal Cortex For Negative Social Scenes, Katherine E. Powers, Dylan D. Wagner, Catherine J. Norris, Todd F. Heatherton

Dartmouth Scholarship

Converging behavioral evidence suggests that people respond to experiences of social exclusion with both defensive and affiliative strategies, allowing them to avoid further distress while also encouraging re-establishment of positive social connections. However, there are unresolved questions regarding the cognitive mechanisms underlying people's responses to social exclusion. Here, we sought to gain insight into these behavioral tendencies by using functional magnetic resonance imaging (fMRI) to examine the impact of social exclusion on neural responses to visual scenes that varied on dimensions of sociality and emotional valence. Compared to socially included participants, socially excluded participants failed to recruit dorsomedial prefrontal cortex …

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The Dartmouth Database Of Children’S Faces: Acquisition And Validation Of A New Face Stimulus Set, Kirsten A. Dalrymple, Jesse Gomez, Brad Duchaine Nov 2013

The Dartmouth Database Of Children’S Faces: Acquisition And Validation Of A New Face Stimulus Set, Kirsten A. Dalrymple, Jesse Gomez, Brad Duchaine

Dartmouth Scholarship

Facial identity and expression play critical roles in our social lives. Faces are therefore frequently used as stimuli in a variety of areas of scientific research. Although several extensive and well-controlled databases of adult faces exist, few databases include children’s faces. Here we present the Dartmouth Database of Children’s Faces, a set of photographs of 40 male and 40 female Caucasian children between 6 and 16 years-of-age. Models posed eight facial expressions and were photographed from five camera angles under two lighting conditions. Models wore black hats and black gowns to minimize extra-facial variables. To validate the images, independent raters …

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Profiting From Regulation: Evidence From The European Carbon Market, James B. Bushnell, Howard Chong, Erin T. Mansur Nov 2013

Profiting From Regulation: Evidence From The European Carbon Market, James B. Bushnell, Howard Chong, Erin T. Mansur

Dartmouth Scholarship

We investigate how cap-and-trade regulation affects profits. In late April 2006, the EU CO2 allowance price dropped 50 percent, equating to a €28 billion reduction in the value of aggregate annual allowances. We examine daily returns for 552 stocks from the EUROSTOXX index. Despite reductions in environmental costs, we find that stock prices fell for firms in both carbon- and electricity-intensive industries, particularly for firms selling primarily within the EU. Our results imply that investors focus on product price impacts, rather than just compliance costs and the nominal value of pollution permits.

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Corruption Dynamics: The Golden Goose Effect, Paul Niehaus, Sandip Sukhtankar Nov 2013

Corruption Dynamics: The Golden Goose Effect, Paul Niehaus, Sandip Sukhtankar

Dartmouth Scholarship

Theoretical work on disciplining corrupt agents has emphasized the role of expected future rents -- for example, efficiency wages. Yet taken seriously this approach implies that illicit future rents should also deter corruption. We study this "golden goose" effect in the context of a statutory wage increase in India's employment guarantee scheme, comparing official microrecords to original household survey data to measure corruption. We estimate large golden goose effects that reduced the total impact of the wage increase on theft by roughly 64 percent. In short, rent expectations matter. (JEL D73, D82, H83, J41, K42, O17, O21)

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Residual Fmri Sensitivity For Identity Changes In Acquired Prosopagnosia, Christopher J. Fox, Giuseppe Iaria, Bradley C. Duchaine, Jason J. S. Barton Oct 2013

Residual Fmri Sensitivity For Identity Changes In Acquired Prosopagnosia, Christopher J. Fox, Giuseppe Iaria, Bradley C. Duchaine, Jason J. S. Barton

Dartmouth Scholarship

While a network of cortical regions contribute to face processing, the lesions in acquired prosopagnosia are highly variable, and likely result in different combinations of spared and affected regions of this network. To assess the residual functional sensitivities of spared regions in prosopagnosia, we designed a rapid event-related functional magnetic resonance imaging (fMRI) experiment that included pairs of faces with same or different identities and same or different expressions. By measuring the release from adaptation to these facial changes we determined the residual sensitivity of face-selective regions-of-interest. We tested three patients with acquired prosopagnosia, and all three of these patients …

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Too Good To Be True: Rhesus Monkeys React Negatively To Better-Than-Expected Offers, Emily J. Knight, Kristen M. Klepac, Jerald D. Kralik Oct 2013

Too Good To Be True: Rhesus Monkeys React Negatively To Better-Than-Expected Offers, Emily J. Knight, Kristen M. Klepac, Jerald D. Kralik

Dartmouth Scholarship

To succeed in a dynamically changing world, animals need to predict their environments. Humans, in fact, exhibit such a strong desire for consistency that one of the most well-established findings in social psychology is the effort people make to maintain consistency among their beliefs, attitudes, and behavior. However, displeasure with unpredictability leads to a potential paradox, because a positive outcome that exceeds one’s expectations often leads to increased subjective value and positive affect, not the opposite. We tested the hypothesis that two evolutionarily-conserved evaluation processes underlie goal-directed behavior: (1) consistency, concerned with prediction errors, and (2) valuation, concerned with outcome …

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Visual Perspective And The Characteristics Of Mind Wandering, Brittany M. Christian, Lynden K. Miles, Carolyn Parkinson, C. Neil Macrae Oct 2013

Visual Perspective And The Characteristics Of Mind Wandering, Brittany M. Christian, Lynden K. Miles, Carolyn Parkinson, C. Neil Macrae

Dartmouth Scholarship

When the mind wanders away from the here-and-now toward imaginary events, it typically does so from one of two visual vantage points—a first-person perspective (i.e., the world is seen as it is in everyday life) or a third-person perspective (i.e., the world is seen from the viewpoint of an outside observer). While extant evidence has detailed consequences that ensue from the utilization of these distinct points of view, less is known about their more basic properties. Here, we investigated the prevalence, demographics and qualities associated with the visual perspective that people spontaneously adopt when the mind wanders. The results from …

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Old Cortex, New Contexts: Re-Purposing Spatial Perception For Social Cognition, Carolyn Parkinson, Thalia Wheatley Oct 2013

Old Cortex, New Contexts: Re-Purposing Spatial Perception For Social Cognition, Carolyn Parkinson, Thalia Wheatley

Dartmouth Scholarship

Much of everyday mental life involves information that we cannot currently perceive directly, from contemplating the strengths of friendships to reasoning about the contents of other minds. Despite their primacy to everyday human functioning, and in particular, to human sociality, the mechanisms that support abstract thought are poorly understood. An explanatory framework that has gained traction recently in cognitive neuroscience is exaptation, or the re-purposing of evolutionarily old circuitry to carry out new functions. We argue for the utility of applying this concept to social cognition. Convergent behavioral and neuroscientific evidence suggests that humans co-opt mechanisms originally devoted to spatial …

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Understanding Less Than Nothing: Children's Neural Response To Negative Numbers Shifts Across Age And Accuracy, Margaret M. Gullick, George Wolford Sep 2013

Understanding Less Than Nothing: Children's Neural Response To Negative Numbers Shifts Across Age And Accuracy, Margaret M. Gullick, George Wolford

Dartmouth Scholarship

We examined the brain activity underlying the development of our understanding of negative numbers, which are amounts lacking direct physical counterparts. Children performed a paired comparison task with positive and negative numbers during an fMRI session. As previously shown in adults, both pre-instruction fifth-graders and post-instruction seventh-graders demonstrated typical behavioral and neural distance effects to negative numbers, where response times and parietal and frontal activity increased as comparison distance decreased. We then determined the factors impacting the distance effect in each age group. Behaviorally, the fifth-grader distance effect for negatives was significantly predicted only by positive comparison accuracy, indicating that …

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Mapping Disease At An Approximated Individual Level Using Aggregate Data: A Case Study Of Mapping New Hampshire Birth Defects, Xun Shi, Stephanie Miller, Kevin Mwenda, Akikazu Onda Sep 2013

Mapping Disease At An Approximated Individual Level Using Aggregate Data: A Case Study Of Mapping New Hampshire Birth Defects, Xun Shi, Stephanie Miller, Kevin Mwenda, Akikazu Onda

Dartmouth Scholarship

Limited by data availability, most disease maps in the literature are for relatively large and subjectively-defined areal units, which are subject to problems associated with polygon maps. High resolution maps based on objective spatial units are needed to more precisely detect associations between disease and environmental factors. Method: We propose to use a Restricted and Controlled Monte Carlo (RCMC) process to disaggregate polygon-level location data to achieve mapping aggregate data at an approximated individual level. RCMC assigns a random point location to a polygon-level location, in which the randomization is restricted by the polygon and controlled by the background (e.g., …

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How Television Fast Food Marketing Aimed At Children Compares With Adult Advertisements, Amy M. Bernhardt, Cara Wilking, Anna M. Adachi-Mejia, Elaina Bergamini, Jill Marijnissen, James D. Sargent Aug 2013

How Television Fast Food Marketing Aimed At Children Compares With Adult Advertisements, Amy M. Bernhardt, Cara Wilking, Anna M. Adachi-Mejia, Elaina Bergamini, Jill Marijnissen, James D. Sargent

Dartmouth Scholarship

Objectives: Quick service restaurant (QSR) television advertisements for children’s meals were compared with adult advertisements from the same companies to assess whether self-regulatory pledges for food advertisements to children had been implemented. Methods: All nationally televised advertisements for the top 25 US QSR restaurants from July 1, 2009 to June 30, 2010 were obtained and viewed to identify those advertising meals for children and these advertisements were compared with adult advertisements from the same companies. Content coding included visual and audio assessment of branding, toy premiums, movie tie-ins, and depictions of food. For image size comparisons, the diagonal length of …

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Self-Regulatory Depletion Increases Emotional Reactivity In The Amygdala, Dylan D. Wagner, Todd F. Heatherton Aug 2013

Self-Regulatory Depletion Increases Emotional Reactivity In The Amygdala, Dylan D. Wagner, Todd F. Heatherton

Dartmouth Scholarship

The ability to self-regulate can become impaired when people are required to engage in successive acts of effortful self-control, even when self-control occurs in different domains. Here, we used functional neuroimaging to test whether engaging in effortful inhibition in the cognitive domain would lead to putative dysfunction in the emotional domain. Forty-eight participants viewed images of emotional scenes during functional magnetic resonance imaging in two sessions that were separated by a challenging attention control task that required effortful inhibition (depletion group) or not (control group). Compared to the control group, depleted participants showed increased activity in the left amygdala to …

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The U.S. Federal Trade Commission’S Line Of Business Program And Innovation Research, John T. Scott Aug 2013

The U.S. Federal Trade Commission’S Line Of Business Program And Innovation Research, John T. Scott

Dartmouth Scholarship

This paper examines how the resources of the Line of Business (LB) Program of the U.S. Federal Trade Commission (FTC) leveraged academic research to develop understanding of science and technology policy and to point to new directions for both research and policy. The paper provides an overview and discussion of the birth and death of the FTC LB Program and its unique LB data, the innovation research using the LB data, and the legacy of the program.

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The Drug Facts Box: Improving The Communication Of Prescription Drug Information, Lisa M. Schwartz, Steven Woloshin Aug 2013

The Drug Facts Box: Improving The Communication Of Prescription Drug Information, Lisa M. Schwartz, Steven Woloshin

Dartmouth Scholarship

Communication about prescription drugs ought to be a paragon of public science communication. Unfortunately, it is not. Consumers see $4 billion of direct-to-consumer advertising annually, which typically fails to present data about how well drugs work. The professional label—the Food and Drug Administration's (FDA) mechanism to get physicians information needed for appropriate prescribing—may also fail to present benefit data. FDA labeling guidance, in fact, suggests that industry omit bene

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Colour And Odour Drive Fruit Selection And Seed Dispersal By Mouse Lemurs, Kim Valenta, Ryan J. Burke, Sarah A. Styler, Derek A. Jackson, Amanda D. Melin, Shawn M. Lehman Aug 2013

Colour And Odour Drive Fruit Selection And Seed Dispersal By Mouse Lemurs, Kim Valenta, Ryan J. Burke, Sarah A. Styler, Derek A. Jackson, Amanda D. Melin, Shawn M. Lehman

Dartmouth Scholarship

Animals and fruiting plants are involved in a complex set of interactions, with animals relying on fruiting trees as food resources, and fruiting trees relying on animals for seed dispersal. This interdependence shapes fruit signals such as colour and odour, to increase fruit detectability, and animal sensory systems, such as colour vision and olfaction to facilitate food identification and selection. Despite the ecological and evolutionary importance of plant-animal interactions for shaping animal sensory adaptations and plant characteristics, the details of the relationship are poorly understood. Here we examine the role of fruit chromaticity, luminance and odour on seed dispersal by …

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Local Responses To Federal Grants: Evidence From The Introduction Of Title I In The South, Elizabeth U. Cascio, Nora Gordon, Sarah Reber Aug 2013

Local Responses To Federal Grants: Evidence From The Introduction Of Title I In The South, Elizabeth U. Cascio, Nora Gordon, Sarah Reber

Dartmouth Scholarship

We analyze the effects of the introduction of Title I of the 1965 Elementary and Secondary Education Act, a large federal grants program designed to increase poor students' educational services and achievement. We focus on the South, the poorest region of the country. Title I increased school spending by $0.50 on the dollar in the average southern school district and by more in districts with less ability to offset grants through local tax reductions. Title I-induced increases in school budgets appear to have reduced high school dropout rates of whites, but not blacks.

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Testing For Factor Price Equality With Unobserved Differences In Factor Quality Or Productivity, Andrew B. Bernard, Stephen J. Redding, Peter K. Schott May 2013

Testing For Factor Price Equality With Unobserved Differences In Factor Quality Or Productivity, Andrew B. Bernard, Stephen J. Redding, Peter K. Schott

Dartmouth Scholarship

We develop a method for identifying departures from relative factor price equality that is robust to unobserved variation in factor productivity. We implement this method using data on the relative wage bills of nonproduction and production workers across 170 local labor markets comprising the continental United States for 1972, 1992, and 2007. We find evidence of statistically significant differences in relative wages in all three years. These differences increase in magnitude over time and are related to industry structure in a manner that is consistent with neoclassical models of production. (JEL J31, J61, R23)

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The Poverty Gap In School Spending Following The Introduction Of Title I, Elizabeth U. Cascio, Sarah Reber May 2013

The Poverty Gap In School Spending Following The Introduction Of Title I, Elizabeth U. Cascio, Sarah Reber

Dartmouth Scholarship

Title I of the 1965 Elementary and Secondary Education Act explicitly directed more federal aid for K-12 education to poorer areas for the first time in US history, with a goal of promoting regional convergence in school spending. Using newly collected data, we find some evidence that Title I narrowed the gap in per-pupil school spending between richer and poorer states in the short- to medium-run. However, the program was small relative to then-existing poverty gaps in school spending; even in the absence of crowd-out by local or state governments, the program could have reduced the gap by only 15 …

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Geographic Variation In Chin Shape Challenges The Universal Facial Attractiveness Hypothesis, Zaneta M. Thayer, Seth D. Dobson Apr 2013

Geographic Variation In Chin Shape Challenges The Universal Facial Attractiveness Hypothesis, Zaneta M. Thayer, Seth D. Dobson

Dartmouth Scholarship

The universal facial attractiveness (UFA) hypothesis proposes that some facial features are universally preferred because they are reliable signals of mate quality. The primary evidence for this hypothesis comes from cross-cultural studies of perceived attractiveness. However, these studies do not directly address patterns of morphological variation at the population level. An unanswered question is therefore: Are universally preferred facial phenotypes geographically invariant, as the UFA hypothesis implies? The purpose of our study is to evaluate this often overlooked aspect of the UFA hypothesis by examining patterns of geographic variation in chin shape. We collected symphyseal outlines from 180 recent human …

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Implicitly Priming The Social Brain: Failure To Find Neural Effects, Katherine E. Powers, Todd F. Heatherton Feb 2013

Implicitly Priming The Social Brain: Failure To Find Neural Effects, Katherine E. Powers, Todd F. Heatherton

Dartmouth Scholarship

Humans have a fundamental need for social relationships. Rejection from social groups is especially detrimental, rendering the ability to detect threats to social relationships and respond in adaptive ways critical. Indeed, previous research has shown that experiencing social rejection alters the processing of subsequent social cues in a variety of socially affiliative and avoidant ways. Because social perception and cognition occurs spontaneously and automatically, detecting threats to social relationships may occur without conscious awareness or control. Here, we investigated the automaticity of social threat detection by examining how implicit primes affect neural responses to social stimuli. However, despite using a …

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An Activity-Generating Theory Of Regulation, Joshua Schwartzstein, Andrei Shleifer Feb 2013

An Activity-Generating Theory Of Regulation, Joshua Schwartzstein, Andrei Shleifer

Dartmouth Scholarship

We propose an activity-generating theory of regulation. When courts make errors, tort litigation becomes unpredictable and as such imposes risk on firms, thereby discouraging entry, innovation, and other socially desirable activity. When social returns to activity are higher than private returns, it may pay the society to generate some information ex ante about how risky firms are and to impose safety standards based on that information. In some situations, compliance with such standards should entirely preempt tort liability; in others, it should merely reduce penalties. By reducing litigation risk, this type of regulation can raise welfare.

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Effects Of Terms Of Trade Gains And Tariff Changes On The Measurement Of Us Productivity Growth, Robert C. Feenstra, Benjamin R. Mandel, Marshall B. Reinsdorf, Matthew J. Slaughter Feb 2013

Effects Of Terms Of Trade Gains And Tariff Changes On The Measurement Of Us Productivity Growth, Robert C. Feenstra, Benjamin R. Mandel, Marshall B. Reinsdorf, Matthew J. Slaughter

Dartmouth Scholarship

The acceleration in US productivity growth since 1995 is often attributed to declining prices for information technology (IT ) goods, and therefore enhanced productivity growth in that sector. We investigate an alternative explanation for these IT price movements: gains in the US terms of trade and tariff reductions, especially for IT products, which led to greater gains than shown by official indexes. We do not, however, investigate the indexes used to deflate the domestic absorption components of GDP, and if upward biases are present in those indexes that could offset some of the effects of mismeasured export and import indexes. …

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Tree Climbing And Human Evolution, Vivek V. Venkataraman, Thomas S. Kraft, Nathaniel J. Dominy Jan 2013

Tree Climbing And Human Evolution, Vivek V. Venkataraman, Thomas S. Kraft, Nathaniel J. Dominy

Dartmouth Scholarship

Paleoanthropologists have long argued—often contentiously—about the climbing abilities of early hominins and whether a foot adapted to terrestrial bipedalism constrained regular access to trees. However, some modern humans climb tall trees routinely in pursuit of honey, fruit, and game, often without the aid of tools or support systems. Mortality and morbidity associated with facultative arboreality is expected to favor behaviors and anatomies that facilitate safe and efficient climbing. Here we show that Twa hunter–gatherers use extraordinary ankle dorsiflexion (>45°) during climbing, similar to the degree observed in wild chimpanzees. Although we did not detect a skeletal signature of dorsiflexion …

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Music And Movement Share A Dynamic Structure That Supports Universal Expressions Of Emotion, Beau Sievers, Larry Polansky, Michael Casey, Thalia Wheatley Jan 2013

Music And Movement Share A Dynamic Structure That Supports Universal Expressions Of Emotion, Beau Sievers, Larry Polansky, Michael Casey, Thalia Wheatley

Dartmouth Scholarship

Music moves us. Its kinetic power is the foundation of human behaviors as diverse as dance, romance, lullabies, and the military march. Despite its significance, the music-movement relationship is poorly understood. We present an empirical method for testing whether music and movement share a common structure that affords equivalent and universal emotional expressions. Our method uses a computer program that can generate matching examples of music and movement from a single set of features: rate, jitter (regularity of rate), direction, step size, and dissonance/visual spikiness. We applied our method in two experiments, one in the United States and another in …

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