The Effects of Family and Neighborhood Characteristics on the Behavioral and Cognitive Development of Poor Black Children: A Longitudinal Study

Using data from an ongoing study of 178 single-mother, Black families, this study investigates the relations among family resources (mothers' employment, income from employment, and educational attainment), maternal depressive symptoms, neighborhood quality in the preschool years and over time, and child developmental outcomes (behavior problems, broad reading, calculation) in the early school years. Results indicate that behavior problems in school-age children were associated with behavior problems early on, the child's gender, the mother's depressive symptoms and, to some extent, her employment status. However, these findings were conditioned by the mother's educational attainment and her evaluation of neighborhood problems early on. Better broad reading scores were associated with higher maternal educational attainment, especially for school-age girls of employed mothers, whereas higher calculation scores were predicted by fewer school-age behavior problems and, in the presence of higher neighborhood problems in the preschool years, mothers' higher educational attainment.     

Self-Reported Depression Is Taxonic

Using the Sample-specific simulation method proposed by J. Ruscio, A. M. Ruscio, and T. M. Keane (2004), the S. R. H. Beach and N. Amir (2003) data are re-analyzed. The results for the MAXEIG and MAMBAC procedures are compared across simulated dimensional, simulated taxonic, and original distributions. The comparison indicates that depression is taxonic in the S. R. H. Beach and N. Amir (2003) sample but has a lower base (.06) than previously reported. This result indicates the need to use a relatively high cut point on total Beck Depression Inventory (i.e., BDI>21; A. T. Beck, 1978) when creating groups using the BDI. That is, the data support the presence of a discontinuity between “depressed” and “nondepressed” undergraduates at a relatively high level of depressive symptomatology. At the same time, it is noted that researchers should remain cautious about the interpretation of taxometric procedures used with low base rate taxa until they have been further investigated using Monte Carlo simulations.

Alternative Employment Arrangements: A Gender Perspective

In this study we drew on national-level data to investigate the gendered nature of two alternative employment arrangements (independent contractors and temporary agency help), preferences for such arrangements, and the extent to which such arrangements accommodate work/family career quandaries of contemporary workers. Multivariate analyses revealed the perpetuation of gender schema and gendered structures, but this varied by type of alternative employment arrangement. Greater preference for temporary agency employment by married women than by married men derived from women not having to be the primary source of family income, rather than from an effort to balance work and child-rearing responsibilities. There were also gender differences in the tendency of married men and women to be independent contractors; women were less likely to be contractors. However, this alternative employment arrangement offers potential for both men and women to satisfy or challenge other gendered family structures and schema.     

Gender,Employment Status,and Abortion: A Longitudinal Analysis

Building upon extant literature, we examine the influence gender and employment status exert on abortion attitudes among the mass public. Specifically, we assess if men, employed women, and homemaker women view the abortion issue differently and if the same factors account for variation in each group's attitudes toward abortion. Analysis of General Social Survey data from 1973 to 2000 indicates that although homemaker women tend to be more pro-life than do men or working women, the attitudes of all 3 groups exhibit similar changes over time. In addition, our results suggest that the same variables account for variation in abortion attitudes for all 3 groups. Our results suggest that the causes and effects of abortion attitudes do not appear to be gender-specific, but rather are relatively uniform across genders and employment statuses.     

Effects of cocaine on fixed-interval responding reinforced by the opportunity to run

Rate-dependent drug effects have been observed for operant responding maintained by food, water, heat, light onset, electrical brain stimulation, shock-stimulus termination, and shock presentation. The present study sought to determine if the effects of cocaine on lever pressing maintained by the opportunity to run could also be described as rate dependent. Seven male Wistar rats were trained to respond on levers for the opportunity to run in a wheel. The schedule of reinforcement was fixed-interval 60 s, and the reinforcing consequence was the opportunity to run for 60 s. On this schedule, overall rates of responding were low, usually below six presses per minute, and pauses frequently exceeded the 60-s interval. Despite these differences, an overall scalloped pattern of lever pressing was evident for each rat. Doses of 1, 2, 4, 8, and 16 mg/kg cocaine were administered 10 min prior to a session. Only at the 16 mg/kg dose did the responding of the majority of rats change in a manner suggestive of a rate-dependent drug effect. Specifically, lower response rates at the beginning of the intervals increased and higher rates at the end of the intervals decreased, as indicated by the fact that slopes from the regression of drug rates on control rates decreased. These data provide tentative support for the generalization of rate-dependent effects to operant responding maintained by wheel running. Differences in the baseline performance maintained by wheel running compared to those for food and water point to the need for further experimentation before this effect can be firmly established.     

Japanese north–south gradient in IQ predicts differences in stature,skin color,income, and homicide rate

Regional differences in IQ are estimated for 47 prefectures of Japan. IQ scores obtained from official achievement tests show a gradient from north to south. Latitudes correlate with height, IQ, and skin color at r = 0.70, 0.44, 0.47, respectively. IQ also correlates with height (0.52), skin color (0.42), income (0.51) after correction, less homicide rate (− 0.60), and less divorce (− 0.69) but not with fertility infant mortali'ty. The lower IQ in southern Japanese islands could be attributable to warmer climates with less cognitive demand for more than fifteen hundred years.     

Emotional expression and heart rate in high-risk infants during the face-to-face/still-face

In infants, eye constriction—the Duchenne marker—and mouth opening appear to index the intensity of both positive and negative facial expressions. We combined eye constriction and mouth opening that co-occurred with smiles and cry-faces (respectively, the prototypic expressions of infant joy and distress) to measure emotional expression intensity. Expression intensity and heart rate were measured throughout the face-to-face/still-face (FFSF) in a sample of infants with prenatal cocaine exposure who were at risk for developmental difficulties. Smiles declined and cry-faces increased in the still-face episode, but the distribution of eye constriction and mouth opening in smiles and cry-faces did not differ across episodes of the FFSF. As time elapsed in the still face episode potential indices of intensity increased, cry-faces were more likely to be accompanied by eye constriction and mouth opening. During cry-faces there were also moderately stable individual differences in the quantity of eye constriction and mouth opening. Infant heart rate was higher during cry-faces and lower during smiles, but did not vary with intensity of expression or by episode. In sum, infants express more intense negative affect as the still-face progresses, but do not show clear differences in expressive intensity between episodes of the FFSF.     

Intelligence and selective attrition in a nationally representative and longitudinal sample of Americans

Selective attrition is a potentially serious problem that can bias the findings that are generated from longitudinal samples. Although the extent to which IQ might be involved in selective attrition has been studied, the results from these studies have been decidedly mixed. The current study adds to the literature examining the link between IQ and selective attrition by examining four waves of data from the National Longitudinal Study of Adolescent Health. Analysis of these data revealed that IQ is related to attrition, with lower IQ respondents more likely to drop out of the study when compared against higher IQ respondents. The evidence suggests that dropouts score about 4.5 IQ points lower than subjects who did not drop out. Limitations of the study are noted and directions for future research are discussed.     

Thermal stability and glass-forming ability of Se80− x Te20Ag x (x = 0, 3, 5, 7 and 9) chalcogenide glasses

The thermal stability and glass-forming ability (GFA) of Se_{80? x} Te₂₀Ag _x (x?=?0,?3,?5,?7 and 9) chalcogenide glasses have been investigated using differential scanning calorimetry (DSC). The DSC runs have been taken at five different heating rates (10, 20, 30, 40 and 50?K/min) under non-isothermal condition. The thermal stability and GFA are monitored through determination of the temperature difference ΔT?=?T _c???T _g, where T _c is the onset crystallization temperature, T _g is the glass transition temperature, H ^l is the stability parameter, ΔH _c is the enthalpy released during crystallization and F _i is the fragility index. The activation energy of crystallization E _c and crystallization rate factor K have also been determined as indicators of the thermal stability of the above-mentioned samples. It is found that Se₇₁Te₂₀Ag₉ is the most stable among all the samples of the series.     

Children's responses to cognitive challenge and links to self-reported rumination

We tested the hypothesis that less effective responses during a cognitive challenge would relate to higher levels of self-reported rumination in children. The sample was 100 children (55 boys, 45 girls), aged 7 to 14 years. A portion (n=65) was at high risk for depression due to having a parent with a childhood-onset mood disorder, and 35 were a low-risk comparison group. Using an impossible puzzle task, we assessed children's responses following failure across several domains: emotions (expressed anger, sadness, and negative self-statements), performance (being off-task, the time to solve subsequent puzzles, and the number solved), and physiology (heart rate, respiratory sinus arrhythmia). Results indicated that making negative self-blaming statements during the solvable puzzles and taking more time to solve the puzzles were associated with higher levels of self-reported rumination. Our findings advance the understanding of potential correlates of children's tendency to ruminate and may have implications for children's performance on cognitive tasks.