Territorial invasion and aggression in young children

Forty black first- and second-grade children were given instructions intended to induce possessiveness for both a designated toy and a play area, along with an opportunity to play with the toy in the area. Each subject then surreptitiously observed an experimental confederate dressed in a clown costume play with either the designated toy or another toy, while either within or outside the child's play area. While observing the invasion, the child had 10 opportunities (trials) to deliver shock to the confederate. Girls who observed the confederate playing with the designated toy delivered more shocks and waited fewer trials to deliver the first shock than did the other girls. Similar effects were produced by the confederate's use of the subject's play area. The manipulations produced no significant effects upon the boys' aggression.     

Effect of insult upon personal space preferences

After sixty male undergraduates individually were either insulted or not insulted by the experimenter, each was tested for body-buffer zone (the physical distance between themselves and an approaching person at which they first reported being uncomfortable) by either the experimenter or an assistant. The body-buffer zones of the insulted subjects were larger when tested by the experimenter than when tested by his assistant; but for those not insulted, there were no differences in body-buffer zone produced by the identity of the tester. The results are discussed in terms of the interaction between affect and interpersonal proxemics.This project was facilitated by the senior author's Margaret Bosshardt Pace and Paul David Pace Research Fellowship.     

Hip Hop Perceptions and Exposure as Predictors of School Outcomes for Black and Latino Adolescents

This study examines the relationship between rap music exposure and perceptions of 351 Black and Latino adolescents and their academic and behavioral outcomes. Findings suggest that adolescents in this study were able to identify both positive and negative aspects of rap music genre. Adolescents who perceived rap music as having socially relevant and empowering qualities had better school outcomes. Exposure to rap videos had a more negative relationship with school outcomes than exposure to rap music lyrics. Implications for research and practice within urban schools and other community settings are discussed.     

Selection,context, or both? The English fluency of Mexican immigrants in the American Midwest and Southwest

Population Research and Policy Review -     

Breastfeeding as a means of contraception

The University of the Philippines Institute of Public Health (UPIPH) and the Family Health International (FHI) brought together health professionals, nutritionists, and family planning experts from different parts of the world to share and gain insights into the issue of breastfeeding and contraception. The participants met in Manila in 1983 and analyzed research findings on breastfeeding and discussed their implications relevant to nutrition and family planning policies and programs. Studies conducted in several countries show a general decline of breastfeeding practice in both urban and rural areas. The issue appears to be not whether women in developing countries breastfeed their infants but for how long. Popkin cites a study in Thailand, which showed very little change in the proportion of babies ever breastfed but large declines in the duration of breastfeeding from 1969-79. In the Philippines, national surveys since 1973 indicate that mothers throughout the country practice breastfeeding but do so for a relatively short period. Scientific data supporting the folk belief that breastfeeding delays the return of fertility after childbirth is growing. The phenomenon is believed to be governed by a sophisticated control mechanism in the female reproductive system. Some researchers suggest that prolactin may be responsible for the delay of fertility in breastfeeding mothers. In a series of studies done in the Philippines and Australia, researchers Barbara Gross and C.J. Eastman found that high prolactin levels were almost always associated with proloned amenorrhea during lactation. A decline in prolactin concentrations accompanied the resumption of menstruation. Gross and Eastman found evidence of ovulation before the 1st menses in only 1 out of 54 fully breastfeeding mothers, or less than 2%. This implies that at least the first few menses of most fully breastfeeding mothers are not accompanied by ovulation, suggesting that breastfeeding continues to affect fertility even after the resumption of breastfeeding. Zablan's study in the Philippine analyzed the various factors contributing to fertility reduction. Breastfeeding appeared to have the greatest impact on the Filipino woman's level of fertility. Zablan points out that, while breastfeeding is a major factor influencing fertility in the Philippines, it "can be relied upon only to postpone childbearing (and then only at the aggregate level), but not to prevent childbearing altogether." Much work needs to be done to help people realize the value of breastfeeding, to encourage mothers to practice it, and to do so for as long as possible.     

The Hispanic population: 1990–2000 growth and change

Data sources indicate that there were significant changes in the Hispanic populationbetween 1990 and 2000. Using short-form data from the 1990 and 2000 censuses,we explore changes in the size and distribution of the Latino population. The mostimportant shifts in the Hispanic population are the continued increase of the Latinopopulation in the United States, the significant growth of Hispanic population whoidentify as `other' Latino, and the growing importance of the Midwest and South aspopular receiving areas for Latinos. Additionally, our comparison of householdcomposition over the ten-year period shows little change. We offer potentialexplanations, both substantive and methodological, for these important transitionsin the Latino population over the decade.