Infant Brain Responses to Object Weight: Exploring Goal‐Directed Actions and Self‐Experience

Recent work has suggested the value of electroencephalographic (EEG) measures in the study of infants' processing of human action. Studies in this area have investigated desynchronization of the sensorimotor mu rhythm during action execution and action observation in infancy. Untested but critical to theory is whether the mu rhythm shows a differential response to actions which share similar goals but have different motor requirements or sensory outcomes. By varying the invisible property of object weight, we controlled for the abstract goal (reach, grasp, and lift the object), while allowing other aspects of the action to vary. The mu response during 14‐month‐old infants' own executed actions showed a differential hemispheric response between acting on heavier and lighter objects. EEG responses also showed sensitivity to “expected object weight” when infants simply observed an experimenter reach for objects that the infants' prior experience indicated were heavier vs. lighter. Crucially, this neural reactivity was predictive—during the observation of the other reaching toward the object, before lifting occurred. This suggests that infants' own self‐experience with a particular object's weight influences their processing of others' actions on the object, with implications for developmental social‐cognitive neuroscience.     

Whose history should be dealt with in a pluricultural context – immigrant adolescents’ approach

This study focuses on migrant adolescents’ perspective on history education with special reference to their families’ home country. The data consist of qualitative interviews with 36 students from various migrant groups (aged 14–16 years). The history of the home country seemed to be significant for the students and they would have wanted to hear about it in school; but in most cases, the main source of information had been family or media.     

The persistence of skin color discrimination for immigrants

Under Title VII of the Civil Rights Act of 1964, discrimination in employment on the basis of color is prohibited, and color is a protected basis independent from race. Using data from the spouses of the main respondents to the New Immigrant Survey 2003, this paper shows that immigrants with the lightest skin color earn on average 16-23% more than comparable immigrants with the darkest skin color. These estimates control for years of legal permanent residence in the US, education, English language proficiency, occupation in source country, Hispanic or Latino ethnicity, race, country of birth, as well as for extensive current labor market characteristics that may be themselves influenced by discrimination. Furthermore, the skin color penalty does not diminish over time. These results are consistent with persistent skin color discrimination affecting legal immigrants to the United States.     

Analyzing the Cost of Screening Selectee and Non-Selectee Baggage

Determining how to effectively operate security devices is as important to overall system performance as developing more sensitive security devices. In light of recent federal mandates for 100% screening of all checked baggage, this research studies the trade-offs between screening only selectee checked baggage and screening both selectee and non-selectee checked baggage for a single baggage screening security device deployed at an airport. This trade-off is represented using a cost model that incorporates the cost of the baggage screening security device, the volume of checked baggage processed through the device, and the outcomes that occur when the device is used. The cost model captures the cost of deploying, maintaining, and operating a single baggage screening security device over a one-year period. The study concludes that as excess baggage screening capacity is used to screen non-selectee checked bags, the expected annual cost increases, the expected annual cost per checked bag screened decreases, and the expected annual cost per expected number of threats detected in the checked bags screened increases. These results indicate that the marginal increase in security per dollar spent is significantly lower when non-selectee checked bags are screened than when only selectee checked bags are screened.     

Gender,Income Levels,and the Demand for Cigarettes

Journal of Risk and Uncertainty - This paper uses data from the Current Population Survey to analyze determinants of cigarette demand. Price elasticities for smoking participation and quantity of...     

Learning to teach history in culturally diverse classrooms

This paper examines prospective history teachers’ thinking about ethnic and cultural diversity and their experiences of learning to teach about history in multicultural classrooms. The paper reviews the findings of a follow‐up study of 22 Finnish student teachers during their nine‐month teacher education programme. The data consist of questionnaire data and various written assignments of this sample, plus interviews with nine selected persons. According to the results, signs of continuity and transformation are apparent in the student teachers’ thinking. The informants frequently described problems related to diversity, although most of them did not see diversity as changing their way of teaching history as such.