Toddlers’ referential understanding of pictures

Pictures are referential in that they can represent objects in the real world. Here we explore the emergence of understanding of the referential potential of pictures during the second year of life. In Study 1, 15-, 18-, and 24-month-olds learned a word for a picture of a novel object (e.g., “blicket”) in the context of a picture book interaction. Later they were presented with the picture of a blicket along with the real object it depicted and asked to indicate the blicket. Many of the 24-, 18-, and even 15-month-olds indicated the real object as an instance of a blicket, consistent with an understanding of the referential relation between pictures and objects. In Study 2, children were tested with an exemplar object that differed in color from the depicted object to determine whether they would extend the label they had learned for the depicted object to a slightly different category member. The 15-, 18-, and 24-month-old participants failed to make a consistent referential response. The results are discussed in terms of whether pictorial understanding at this age is associative or symbolic.     

Young Australian Women’s Aspirations for Work and Family: Individual and Sociocultural Differences

The arguments underlying Hakim’s Lifestyle Preference Theory have initiated debate over the importance of individual preferences, versus social and structural constraints, in women’s work and family patterns. This paper investigates the role of sociocultural factors in lifestyle preferences. A total of 6,929 Australian women, aged 25–30 years, from the Australian Longitudinal Study on Women’s Health (ALSWH), were categorised into Hakim’s Lifestyle Preference Groups, based on their aspirations for work and family. Rather than cutting across social groups, membership into Lifestyle Preference Groups was significantly related to sociodemographic variables. Further, the findings suggested that Hakim’s definition of ‘adaptive’ women may be too limited to capture the variability of the large number of young Australian women aspiring to combine paid work and family.     

Maternal and Paternal Parenting Styles in Adolescents: Associations with Self-Esteem,Depression and Life-Satisfaction

Our study examined variations in adolescent adjustment as a function of maternal and paternal parenting styles. Participants included 272 students in grades 9 and 11 from a public high school in a metropolitan area of the Northeastern US. Participants completed measures of maternal and paternal parenting styles and indices of psychological adjustment. Authoritative mothering was found to relate to higher self-esteem and life-satisfaction and to lower depression. Paternal parenting styles was also related to psychological adjustment, however, although the advantage of authoritative mothering over permissive mothering was evident for all outcomes assessed, for paternal styles the advantage was less defined and only evident for depression. Our study highlights the importance of examining process-oriented agents as part of the broader interest in well-being variations in adolescents.     

Role of matrix metalloproteinases in the acquisition and reconsolidation of cocaine-induced conditioned place preference

Persistent drug seeking/taking behavior involves the consolidation of memory. With each drug use, the memory may be reactivated and reconsolidated to maintain the original memory. During reactivation, the memory may become labile and susceptible to disruption; thus, molecules involved in plasticity should influence acquisition and/or reconsolidation. Recently, matrix metalloproteinases (MMPs) have been shown to influence neuronal plasticity, presumably by their regulation of extracellular matrix (ECM) molecules involved in synaptic reorganization during learning. We hypothesized that inhibition of MMP activity would impair the acquisition and/or reconsolidation of cocaine-conditioned place preference (CPP) in rats. Intracerebral ventricular (i.c.v.) microinjection of a broad spectrum MMP inhibitor, FN-439, prior to cocaine training suppressed acquisition of CPP and attenuated cocaine-primed reinstatement in extinguished animals. In a separate experiment, the cocaine memory was reactivated on two consecutive days with a cocaine priming injection. On these two days, artificial cerebral spinal fluid (aCSF) or FN-439 was administered either 30 min prior to or 1 min after cocaine-primed reinstatement sessions. Infusion of FN-439 partially impaired retrieval of the cocaine-associated context when given 30 min prior to cocaine. In both groups, however, FN-439 suppressed reinstatement compared with controls on the third consecutive test for cocaine-primed reinstatement, when no FN-439 was given. Control experiments demonstrated that two injections of FN-439 + cocaine given in the home cage, or of FN-439 + saline priming injections in the CPP chambers did not disrupt subsequent cocaine-primed reinstatement. These results show for the first time that (1) MMPs play a critical role in acquisition and reconsolidation of cocaine-induced CPP, and (2) rats demonstrate apparent disruption of reconsolidation by an MMP inhibitor after extinction and while they are under the influence of cocaine during reinstatement.     

The Perverse Effects of Competition on Scientists’ Work and Relationships

Competition among scientists for funding, positions and prestige, among other things, is often seen as a salutary driving force in U.S. science. Its effects on scientists, their work and their relationships are seldom considered. Focus-group discussions with 51 mid- and early-career scientists, on which this study is based, reveal a dark side of competition in science. According to these scientists, competition contributes to strategic game-playing in science, a decline in free and open sharing of information and methods, sabotage of others’ ability to use one’s work, interference with peer-review processes, deformation of relationships, and careless or questionable research conduct. When competition is pervasive, such effects may jeopardize the progress, efficiency and integrity of science.     

Development and Validation of the Weekly Stress Inventory-Short Form

The Weekly Stress Inventory (WSI) has been used both in research and in clinical settings to measure minor stress. Although this tool offers a reliable and valid measure to assess minor stress, it lacks brevity that would make it more feasible for rapid assessments of stress needed in many research and clinical settings. The current study assessed the psychometrics of the newly developed Weekly Stress Inventory Short Form (WSI-SF), a 25-item scale to measure minor stress. Adults attending general medicine clinics (n = 171) at a public teaching hospital completed the WSI-SF and the WSI. The WSI-SF was found to have good internal consistency for both the events score (.92) and impact score (.91) and good convergent validity with the WSI. The results of the present study suggest that the WSI-SF is a reliable and valid instrument for use in assessing minor stress.     

Postpartum Daily Stress,Relationship Quality,and Depressive Symptoms

This study explored the relationships among daily stresses, specifically interpersonal conflict, the quality of supportive spousal relationships, and the experience of postpartum depressive symptoms. In our sample of 51 women nearly 30% reported symptoms consistent with postpartum depression. Using regression analysis and controlling for depression during pregnancy, results suggested that arguments with family members and the depth of the spousal relationship acted as significant predictors of the severity of reported postpartum depressive symptoms. Results of the regression were in the expected direction, but due to the small sample size, the findings should be interpreted with caution. Post-hoc analyses were conducted separating the women into three groups based on their depression scores. Therapeutic interventions to reduce postpartum depressive symptoms are considered. An erratum to this article can be found at     

Changes in children's appraisals of marital discord from childhood through adolescence.

The study examined how children's appraisals of marital conflict (threat and self-blame) changed across development, whether changes in exposure to marital conflict were associated with corresponding changes in appraisals, and whether the appraisal process was different for boys and girls. Data were collected on 112 families (224 children) at 4 time points. At each wave, children (mean ages ranged from 8 to 19) provided information on their appraisals of marital conflict, and parents provided information on children's exposure to marital conflict. Results indicated that appraisals of threat declined rapidly from childhood to adolescence and then declined less rapidly across adolescence; appraisals of self-blame showed little change over time. Second, changes in exposure to marital discord covaried with changes in threat over time, but not with changes in self-blame. Finally, boys experienced more self-blame than girls on average, and gender moderated the association between exposure to marital discord and threat. Results suggest that development, exposure to marital conflict, and gender are important in determining why some children appraise their parents' disputes negatively.     

Differences in visual orienting between persons with Down or fragile X syndrome

The voluntary and reflexive orienting abilities of persons with Down syndrome and fragile X syndrome, at average MA levels of approximately 4 and 7 years, were compared with an RT task. Reflexive orienting abilities appeared to develop in accordance with MA for the participants with Down syndrome but not for those with fragile X syndrome. However, both groups showed delayed voluntary orienting. The group differences in reflexive orienting at the low MA level reinforce the practice of separating etiologies and highlight the contribution of rudimentary attentional processes in the study of individuals with mental retardation.