Can Infants Use a Nonhuman Agent's Gaze Direction to Establish Word–Object Relations?

Adopting a procedure developed with human speakers, we examined infants' ability to follow a nonhuman agent's gaze direction and subsequently to use its gaze to learn new words. When a programmable robot acted as the speaker (Experiment 1), infants followed its gaze toward the word referent whether or not it coincided with their own focus of attention, but failed to learn a new word. When the speaker was human, infants correctly mapped the words (Experiment 2). Furthermore, when the robot interacted contingently, this did not facilitate infants' word mapping (Experiment 3). These findings suggest that gaze following upon hearing a novel word is not sufficient to learn the referent of the word when the speaker is nonhuman.     

Combining Forecasts: Multiple Regression versus a Bayesian Approach*

Simple linear combinations of forecasts have consistently been found to be more accurate than individual forecasts. Several recent studies have found that combination forecasts derived by constrained or unconstrained multiple regression are more accurate than a simple average of individual forecasts. This study uses macroeconomic data to compare the accuracy of combination forecasts derived by a Bayesian methodology with the accuracy of composite forecasts derived by multiple regression. Using the forecasts of four macroeconomic variables from five well-known econometric models, the study finds that the Bayesian combination procedure produces more accurate composite forecasts than does the regression combination procedure, based on a version of Theil's U² statistic.     

Race still matters: preparing culturally relevant teachers

This qualitative study explores racial identity development of teacher candidates during a teacher preparation program dedicated to preparing teachers for diverse classrooms. Two black teacher candidates in the US demonstrate their racial identity development through critical reflections offered throughout the program. Findings suggest that teachers’ racial identities shaped their constructions of culturally relevant (CR) pedagogy. Implications for teacher education programs include considering how the development of CR pedagogues is influenced by teacher candidates’ racial identities and experiences.     

Relighting the Fire: Visualizing the Lesbian in Contemporary India

This article revisits the controversy surrounding Deepa Mehta's Fire (1996), India's first publicly released film depicting female same-sex desire. The film has become a touchstone for discussions of the representation of queer and lesbian, gay, bisexual, and transgender (LGBT) lives in India. While the majority of critical accounts of the film have rejected the use of “lesbian” on the basis of its Anglo-American specificity, this article seeks to recast lesbians at the heart of Fire by filtering them through the lens of transnational protest, and by offering a close reading of the film's own play on religious and cultural symbolism. Viewed almost two decades after its release, in the light of the Delhi rape case of December 2012 and subsequent events, including the upholding of a law criminalizing gay sex in November 2013, the film now more than ever seems to offer a fantasy of the future, rather than a viable reality in the present day. Within Fire, the circumnavigation of heteronormative power and desire is certainly queer, but the film's labeling as “lesbian” subsequent to its release in India opened up an important public forum for a debate about female desire and independence that continues to resonate today. This article does not attempt to offer a conclusive argument about the use of the term “lesbian” to label the relationship between women that is depicted within the film, but it does examine the way in which the film itself visualizes desire between women, and in particular the use of Hindu narratives, imagery and motifs. The film's interpellation into lesbian politics is facilitated by the strong emphasis on a female-centered desire that is not defined by motherhood, that cannot be contained, and that demands to be seen.     

“Knowing Your Status and Knowing Your Partner’s Status Is Really Where It Starts”: A Qualitative Exploration of the Process by Which a Sexual Partner’s HIV Status Can Influence Sexual Decision Making

Gay and bisexual men are at disproportionate risk for human immunodeficiency virus (HIV) infection. While prevention efforts often emphasize consistent condom use, there is growing evidence that men are using seroadaptive safer-sex strategies, such as serosorting and seropositioning. This qualitative analysis of 204 HIV-negative and HIV-positive gay and bisexual men explored the ways that a sexual partner’s HIV status can influence safer-sex strategies and sexual decisions. The majority of the respondents reported that they were influenced by their partners’ HIV status. Those respondents who reported no influence discussed adhering to safer-sex rules that were not dependent on partner status and a lack of concern about HIV. Conversely, respondents who reported influence identified three primary areas of influence: psychological impacts, partner preference and selection, and specific behavioral intentions and strategies. A conceptual model explicating a potential process by which respondents use partner serostatus information in shaping sexual decisions is presented.     

Assessing Variations in Developmental Outcomes Among Teenage Offspring of Teen Mothers: Maternal Life Course Correlates

This study investigated potential heterogeneity in development among offspring (age 17) of teen mothers and maternal life course as correlates of variation. Using latent class analysis, subgroups of developmental outcomes were identified. Maternal standing in two life course realms (i.e., socioeconomic and domestic) was considered as a potential explanation for heterogeneity in offspring's development. Offspring reported on measures assessing their psychological, academic, and behavioral development. Teen mothers reported on measures of life course realms. Three subgroups of developmental outcomes were identified: on track (52%), at risk (37%), and troubled (11%). Findings suggest that economic hardship and number of pregnancies among teen mothers distinguish developmental patterns among teenage offspring, whereas teen mothers' educational attainment and marital status do not.     

Drivers of variability in water use of native and non-native urban trees in the greater Los Angeles area

Trees in urban ecosystems are valued for shade and cooling effects, reduction of CO₂ emissions and pollution, and aesthetics. However, in arid and semi-arid regions, urban trees must be maintained through supplemental irrigation, in competition with other water needs. Currently, a comprehensive understanding of the factors which influence water use of urban tree species is lacking. In order to study the drivers of whole tree water use of two common species in the Los Angeles Basin urban forest, four sites in Los Angeles and Orange County were instrumented with sap flow and meteorological sensors. These sites allowed comparisons of the water use of a native riparian (Platanus racemosa Nutt.; California sycamore) and non-native (Pinus canariensis C. Sm.; Canary Island pine) Mediterranean species, as well as the spatial variability in water use under different environmental and management conditions. We found higher rates of sapflux (J _O ) in native California sycamore as compared to non-native Canary Island pine. Within each species, we found considerable site-to-site variability in the magnitude and seasonality of J _O . For Canary Island pine, the majority of inter-site variability derived from differences in water availability: response to vapor pressure deficit was similar during a period without water limitations. In contrast, California sycamore did not appear to experience water limitation at any site; however, there was considerable spatial variability in water use, potentially linked to differences in nutrient availability. Whole tree transpiration (E) was similar for the two species when water was not limiting, but Canary Island pine was able to withstand unirrigated conditions with a very low E. These results add to the currently small pool of data on urban tree water use and ecophysiology, and contribute to establishing a more quantitative understanding of urban tree function.     

A representative measure of psychological aggression and its severity

Surveys of psychological aggression have been plagued by a variety of conceptual and measurement problems. A new measure was devised to more systematically cover a full range of psychologically aggressive actions; to include items for each dimension/category at a milder, moderate, and severe level; to be applicable to dating as well as marital relationships; and to utilize items that were broader in nature to capture all instances of particular types of psychological aggression. Three hundred and eighty-three college students rated the 51 items as to their degree of "psychological abusiveness." The 17 categories were rated as mostly distinct from each other; almost every category had statistically distinct mild, moderate and severe items; the overall scale yielded basically normal psychometric properties; and the total score, as well as the scores for the mild, moderate, and severe items, all had very high internal consistency. Ratings of these items appear to be distinct from social desirability as well as from a number of attitudinal response sets, and only sex of the participant was significantly, although weakly, correlated with overall ratings of the psychological aggression items. This measure may provide for more systematic investigation into the concept of psychological aggression.