Post Traumatic Stress,Context, and the Lingering Effects of the Hurricane Katrina Disaster among Ethnic Minority Youth

This study examined the stability of post traumatic stress disorder (PTSD) symptoms in a predominantly ethnic minority sample of youth exposed to Hurricane Katrina. Youth (n = 191 grades 4th thru 8th) were screened for exposure to traumatic experiences and PTSD symptoms at 24 months (Time 1) and then again at 30 months (Time 2) post-disaster. PTSD symptoms did not significantly decline over time and were higher than rates reported at earlier time points for more ethnically diverse samples. Younger age, female sex, and continued disrepair to the child’s home predicted stable elevated PTSD symptoms. Findings are consistent with predictions from contextual theories of disaster exposure and with epidemiological data from adult samples suggesting that the incidence of PTSD post Katrina is showing an atypical pattern of remittance. Theoretical, applied, and policy implications are discussed.     

Memory-enhancing corticosterone treatment increases amygdala norepinephrine and Arc protein expression in hippocampal synaptic fractions

Considerable evidence indicates that glucocorticoid hormones enhance the consolidation of memory for emotionally arousing events through interactions with the noradrenergic system of the basolateral complex of the amygdala (BLA). We previously reported that intra-BLA administration of a β-adrenoceptor agonist immediately after inhibitory avoidance training enhanced memory consolidation and increased hippocampal expression of the protein product of the immediate early gene activity-regulated cytoskeletal-associated protein (Arc). In the present experiments corticosterone (3 mg/kg, i.p.) was administered to male Sprague-Dawley rats immediately after inhibitory avoidance training to examine effects on long-term memory, amygdala norepinephrine levels, and hippocampal Arc expression. Corticosterone increased amygdala norepinephrine levels 15 min after inhibitory avoidance training, as assessed by in vivo microdialysis, and enhanced memory tested at 48 h. Corticosterone treatment also increased expression of Arc protein in hippocampal synaptic tissue. The elevation in BLA norepinephrine appears to participate in corticosterone-influenced modulation of hippocampal Arc expression as intra-BLA blockade of β-adrenoceptors with propranolol (0.5 μg/0.2 μL) attenuated the corticosterone-induced synaptic Arc expression in the hippocampus. These findings indicate that noradrenergic activity at BLA β-adrenoceptors is involved in corticosterone-induced enhancement of memory consolidation and expression of the synaptic-plasticity-related protein Arc in the hippocampus.     

Helping students acquire belief-inconsistent and belief-consistent science facts: Comparisons between individual and dyad study using elaborative interrogatin,self-selected study and repetitious-reading

One hundred and eighty four grade 6 and 7 students processed 32 factual statements in one of two studies reported here. Half the statements were consistent with the students' prior knowledge, whereas the remaining facts were inconsistent with it. Students studied the facts alone, or with a partner, by: (1) answering 'why' questions; (2) reading the information for understanding; or (3) selecting their own method of study. Recall (free and cued) and recognition measures (immediate, 30-day, and 60-day) were used to assess learning (immediate, 30-day, and 60-day). Instructions to use elaborative interrogation produced superior learning gains relative to instructing students to read information for understanding or to select their own study strategy. Overall, there were no performance differneces as a function of individual versus dyad study. The quality of the elaborative interrogation study response affected learning. When students generated or listened to a partner's response that clarified the target facts, learning of that information was superior to when students generated or listened to other types of study responses.     

Cell phone usage relational regulation strategies of older South Africans

This study explored older South Africans’ relational regulation strategies in using their cell phones to address their social goals and psychosocial needs. Nineteen older South Africans (17 female; 2 male), aged 60 and older, who had access to a cell phone and represented different socio-economic levels based on the Living Standard Measurement (LSM) scale, participated in the Mmogo-method®, a visual data-collection method. Thematic and visual analysis revealed that the subjective assessment of cell phone users’ competence determined the type of relational regulation strategy they apply. Findings revealed older persons to adopt three relational regulation strategies in their cell phone use: (i) postponement of need satisfaction; (ii) asking directly; or (iii) negotiating for needs satisfaction. The findings might facilitate programmes that promote cell phone use in older persons to address their social needs and promote healthy intergenerational interactions.     

Changing people’s views of outgroups through individual-to-group generalisation: meta-analytic reviews and theoretical considerations

Through individual-to-group generalisation, information about individual members of stigmatised social groups changes the outgroup judgment. This article reports meta-analytic reviews of over 30 years of experimental, lab-based research on individual-to-group generalisation (107 independent tests; 5393 participants). In a first meta-analysis, a positive, medium-size generalisation effect was detected (r = .28, p < .001), reflecting significant generalisation of outgroup exemplar information to the outgroup judgment. This effect was moderated by the number of exemplars and exemplar typicality, with more moderately atypical exemplars maximising generalisation effects. Several other design parameters—including type of control condition, generalisation measures, mode of information provision, type of target outgroup and origin of study—did not moderate the positive generalisation effect. A second meta-analysis investigated the interplay between metacognitions and generalisation and found assimilation effects with metacognitive triggers encouraging exemplar inclusion, and contrast effects with metacognitive cues encouraging exemplar exclusion. These results demonstrate that the same outgroup exemplar can lead to bias reduction or bias exacerbation, depending on available meta-cognitive cues. Findings are discussed in terms of implications for intergroup psychology, generalisation theory and bias reduction interventions.