Sex differences during visual scanning of occlusion events in infants

A growing number of sex differences in infancy have been reported. One task on which they have been observed reliably is the event-mapping task. In event mapping, infants view an occlusion event involving 1 or 2 objects, the occluder is removed, and then infants see 1 object. Typically, boys are more likely than girls to detect an inconsistency between a 2-object occlusion event and a 1-object display. The current research investigated underlying reasons for this sex difference. Three eye-tracking experiments were conducted with infants at 9 and 4 months (mean age). Infants saw a ball-box or ball-ball occlusion event followed by a 1-ball display; visual scanning of the occlusion event and the 1-ball display was recorded. Older boys were more likely than older girls to visually track the objects through occlusion and more likely to detect an inconsistency between the ball-box event and the 1-ball display. In addition, tracking objects through occlusion was related to infants' scanning of the 1-ball display. Both younger boys and girls failed to track the objects through occlusion and to detect an inconsistency between the ball-box event and the 1-ball display. These results suggest that infants' capacity to track objects through occlusion facilitates extraction of the structure of the initial event (i.e., the number of distinct objects involved) that infants can map onto the final display and that sex differences in the capacity emerge between 4 and 9 months. Possible explanations for how the structure of an occlusion event is extracted and mapped are considered.     

Describing Spiritual Growth in an Online Religious Education Course

This research examined the phenomenon of spiritual growth in students taking an online religious education course at Brigham Young University–Idaho. Semi-structured interviews were conducted with 10 students who reported positive gains in spirituality as a result of the course. Students described their experience in the online course and the factors that contributed to their success.

Results suggest participants took a great deal of ownership in their own spiritual growth. Although it seems likely participants were already highly self-directed, aspects of the online experience appeared to encourage self-direction. The course design was flexible enough for research participants to explore ideas on their own while also being structured enough to provide a guided experience. Online instructors acted as guides and facilitators, playing a less prominent role than face-to-face instructors. Frequent engagement in and reflection through writing appeared to be important for students’ spiritual growth, whereas online interactions with other students seemed to have minimal impact. However, some responses suggested online interaction with peers was an area with potential for greater influence.     

Longitudinal Effects of Reading Intervention on Below Grade Level,Preadolescent, Title I Students

Some claim that good and poor readers continue their trajectories despite intervention. This quasi-experimental study examined whether the READ 180 program helps general education, below-grade-level, Title I preadolescent readers improve. Participants included 82 students, grades 4–8, in public Title I elementary and middle schools. Results showed that below grade-level readers improved after intervention and attained grade-level status. Differences remained between participants and their nonintervention peers during follow-up testing. However, when examining growth trajectories, a reversal in performance between the two groups was manifested. The below-grade-level students’ mean growth between years 1 and 2 after intervention was actually greater than that of their on-grade-level peers with no intervention. The performance trajectory narrowed over time after successful intervention.     

Support for religio-political aggression among teenaged boys in Gaza: part II: neuroendocrinological findings

Hormones seem to play important roles in the regulation of human aggression. Multiple studies have confirmed that testosterone (T) levels exhibit complex relationships with aggression, dominance, and/or risk-taking behavior. Some evidence suggests that cortisol (CORT) interacts with T and may also be associated with aspects of mood and aggression. However, almost no research to date has investigated the possibility that these neuroendocrine factors are associated with variations in political attitudes or with political aggression. During the second intifada, we tested the hypothesis that morning salivary T and/or salivary CORT levels might be associated with self-rated aggression or with support for religio-political aggression (RPA) among 14-year-old Palestinian boys living in Gaza. We obtained and averaged weekly 09:00 hr salivary measures of T and CORT for more than 1 month. Averaged morning T levels did not correlate with self-rated aggression, but were positively associated with agreement with the statement "religious ends justify any means," (r = .355, P = .014) and marginally associated with a composite measure of support for RPA (r = .247, P = .094). Average CORT levels were inversely correlated with self-rated aggression (r = -.328, P = .037) and with anger (r = -.373, P = .016), but CORT levels were not associated with support for RPA or with the statement "religious ends justify any means." Acknowledging that a modest sample size and methodological issues necessarily limit confidence in our conclusions, these results may represent the first findings regarding neurobiological correlates of support for political aggression.     

Psychometric properties of reverse-scored items on the CES-D in a sample of ethnically diverse older adults

Reverse-scored items on assessment scales increase cognitive processing demands and may therefore lead to measurement problems for older adult respondents. In this study, the objective was to examine possible psychometric inadequacies of reverse-scored items on the Center for Epidemiologic Studies Depression Scale (CES-D) when used to assess ethnically diverse older adults. Using baseline data from a gerontologic clinical trial (n = 460), we tested the hypotheses that the reversed items on the CES-D (a) are less reliable than nonreversed items, (b) disproportionately lead to intraindividually atypical responses that are psychometrically problematic, and (c) evidence improved measurement properties when an imputation procedure based on the scale mean is used to replace atypical responses. In general, the results supported the hypotheses. Relative to nonreversed CES-D items, the 4 reversed items were less internally consistent, were associated with lower item-scale correlations, and were more often answered atypically at an intraindividual level. Further, the atypical responses were negatively correlated with responses to psychometrically sound nonreversed items that had similar content. The use of imputation to replace atypical responses enhanced the predictive validity of the set of reverse-scored items. Among older adult respondents, reverse-scored items are associated with measurement difficulties. It is recommended that appropriate correction procedures such as item readministration or statistical imputation be applied to reduce the difficulties.     

Infants' representations of three-dimensional occluded objects

Infants' ability to represent objects has received significant attention from the developmental research community. With the advent of eye-tracking technology, detailed analysis of infants' looking patterns during object occlusion have revealed much about the nature of infants' representations. The current study continues this research by analyzing infants' looking patterns in a novel manner and by comparing infants' looking at a simple display in which a single three-dimensional (3D) object moves along a continuous trajectory to a more complex display in which two 3D objects undergo trajectories that are interrupted behind an occluder. Six-month-old infants saw an occlusion sequence in which a ball moved along a linear path, disappeared behind a rectangular screen, and then a ball (ball-ball event) or a box (ball-box event) emerged at the other edge. An eye-tracking system recorded infants' eye-movements during the event sequence. Results from examination of infants' attention to the occluder indicate that during the occlusion interval infants looked longer to the side of the occluder behind which the moving occluded object was located, shifting gaze from one side of the occluder to the other as the object(s) moved behind the screen. Furthermore, when events included two objects, infants attended to the spatiotemporal coordinates of the objects longer than when a single object was involved. These results provide clear evidence that infants' visual tracking is different in response to a one-object display than to a two-object display. Furthermore, this finding suggests that infants may require more focused attention to the hidden position of objects in more complex multiple-object displays and provides additional evidence that infants represent the spatial location of moving occluded objects.     

The development of infants’ use of property-poor sounds to individuate objects

There is evidence that infants as young as 4.5 months use property-rich but not property-poor sounds as the basis for individuating objects (Wilcox, Woods, Tuggy, & Napoli, 2006). The current research sought to identify the age at which infants demonstrate the capacity to use property-poor sounds. Using the task of Wilcox et al., infants aged 7 and 9 months were tested. The results revealed that 9- but not 7-month-olds demonstrated sensitivity to property-poor sounds (electronic tones) in an object individuation task. Additional results confirmed that the younger infants were sensitive to property-rich sounds (rattle sounds). These are the first positive results obtained with property-poor sounds in infants and lay the foundation for future research to identify the underlying basis for the developmental hierarchy favoring property-rich over property-poor sounds and possible mechanisms for change.     

Spiritual Maturity and Social Support in a National Study of a Male Religious Order

This national study analyzed the relationship of spiritual maturity and valued relationships with social support and life satisfaction using a random sample of male religious from one Roman Catholic order (N = 251). Four measures were used: (a) NEO-Five Factor Inventory (NEO-FFI; Costa & McCrae, 1992), (b) Spiritual Maturity Index (SMI; Ellison, 1983), (c) Social Support Appraisals Scale (SS-A; Vaux, et al., 1986), and (d) Satisfaction With Life Scale (SWLS; Diener, Emmons, Larsen, & Griffin, 1985). Hierarchical regression results showed that Spiritual Maturity was a significant predictor of Perceived Social Support (F (1, 237) = 20.662, p ≤ .001) and Life Satisfaction (F(1, 237) = 13.205, p ≤ .001). The study also showed that valued relationships inside (versus outside) the order predicted Life Satisfaction (F(1, 236) = 4.722, p ≤ .05). These findings demonstrate the importance of spiritual development and peer relationships as a way of enhancing vocational stability and satisfaction in male religious.     

Public Opinion on Church-State Issues in a Changing Environment

The recent waves of Muslim, Sikh, Buddhist, and other non-Judeo-Christian immigrants in American cities have increased religious diversity. This article examines changes in public attitudes on church-state issues in the Washington, D.C. metro area—a region that has experienced significant religious diversification. We find that between 1993 and 2000, aggregate support for public displays of Christianity decreased in the Washington area, and support for free exercise of minority religions increased. Yet the changing structure of church-state attitudes suggests that many residents are beginning to think of religious issues in a more polarized way.     

Robust regression: Testing global hypotheses about the slopes when there is multicollinearity or heteroscedasticity

A well-known concern regarding the usual linear regression model is multicollinearity. As the strength of the association among the independent variables increases, the squared standard error of regression estimators tends to increase, which can seriously impact power. This paper examines heteroscedastic methods for dealing with this issue when testing the hypothesis that all of the slope parameters are equal to zero via a robust ridge estimator that guards against outliers among the dependent variable. Included are results related to leverage points, meaning outliers among the independent variables. In various situations, the proposed method increases power substantially.