Effects of Mothers' Locus of Control for Child Improvement in a Developmentally Delayed Sample

A potentially important variable that has received little attention in the literature is the locus of control (LOC) a caregiver holds for child improvement, including its influence on the caregiver's treatment compliance and on actual child improvement. In this study, 131 mother-child dyads were assessed across 1 year, to evaluate the utility of the LOC construct in a practice setting. Children were approximately 4 years old at the first assessment, and all of them had been diagnosed with a developmental disability. Mothers' compliance with treatment (mothers' attendance at sessions; teachers' ratings of mothers' support and knowledge) was tracked, and measures of child development status and mothers' locus of control were administered. Statistical results indicated that mothers' locus of control was not significantly correlated with children's gains in development over the year. The mothers' beliefs about whether the child or chance would be responsible for improvement were associated with lower compliance with treatment, whereas the mothers' beliefs that child improvement was attributable to professional intervention were associated with enhanced involvement in treatment.     

Childhood anxiety associated with low BMI in women with Anorexia Nervosa

Objective

Extremely low body mass index (BMI) values are associated with increased risk for death and poor long-term prognosis in individuals with anorexia nervosa (AN). The present study explores childhood personality characteristics that could be associated with the ability to attain an extremely low BMI.

Methods

Participants were 326 women from the Genetics of Anorexia Nervosa (GAN) Study who completed the Structured Interview for Anorexia Nervosa and Bulimic Syndromes and whose mother completed the Child Behavioral Checklist and/or Revised Dimensions of Temperament Survey.

Results

Children who were described as having greater fear or anxiety by their mothers attained lower BMIs during AN (p < 0.02). Path analysis in the GAN and a validation sample, Price Foundation Anorexia Nervosa Trios Study, confirmed the relation between early childhood anxiety, caloric restriction, qualitative food item restriction, excessive exercise, and low BMI. Path analysis also confirmed a relation between childhood anxiety and caloric restriction, which mediated the relation between childhood anxiety and low BMI in the GAN sample only.

Conclusion

Fearful or anxious behavior as a child was associated with the attainment of low BMI in AN and childhood anxiety was associated with caloric restriction. Measures of anxiety and factors associated with anxiety-proneness in childhood may index children at risk for restrictive behaviors and extremely low BMIs in AN.     

Loose and Tight: Creative Formation but Rigid Use of Nominal Compounds in Conspiracist Texts

Conspiracy theories (CTs) are spectacular narratives, widely spread, that pose societal threats. We test whether CTs might be linguistically creative products, which would facilitate their transmission and thereby account for their widespread popularity. We analyzed nominal compounds (e.g., mind control, carbon dioxide; N = 1,713,568) from a large corpus of conspiracist and mainstream texts matched by topic. In conspiracist texts, compounds showed greater originality, divergence, and sophistication, but they were used with lower frequency and were more often repeated in different contexts. This pattern suggests a creative aspect in the generation of compounds, coupled with rigidity in their use. We interpret these findings as an effect of loosely defined conceptual boundaries among conspiracist writers, in conjunction with social functions like status or group signaling. Our findings not only contribute to the discourse on creativity in CTs but also provide insights into the communicative advantage of CTs.     

Locus of control as a mediator of the association between attachment and children’s mental health

Locus of control—the expectation that one is in control of one’s outcomes in life—is linked to well-being. The authors explored one of the possible antecedents of locus of control such as secure children’s attachment. The hypothesis was that locus of control acts as a mediator of the association between children’s attachment and their mental health, in terms of depression, anxiety (internalizing problems), and aggression (externalizing problems). Participants were 206 children with ages ranging from 8 to 14 years. The authors obtained data from teachers as well as by self-report. Structural equations modelling yielded significant results for both a direct path from insecure attachment to internalizing problems and an indirect pathway in which locus of control functions as a mediating variable between children’s attachment and internalizing problems. Although the data were consistent with the mediated pathway with regard to internalizing problems, different findings emerged for aggression. Insecure attachment was a significant predictor of aggressive behavior, while locus of control was not a mediator between attachment and aggressive behavior. The authors’ findings confirm the mediating role of the locus of control between attachment and internalizing problems, but not between attachment and externalizing ones.     

Conversation analysis at work: detection of conflict in competitive discussions through semi-automatic turn-organization analysis

This study proposes a semi-automatic approach aimed at detecting conflict in conversations. The approach is based on statistical techniques capable of identifying turn-organization regularities associated with conflict. The only manual step of the process is the segmentation of the conversations into turns (time intervals during which only one person talks) and overlapping speech segments (time intervals during which several persons talk at the same time). The rest of the process takes place automatically and the results show that conflictual exchanges can be detected with Precision and Recall around 70% (the experiments have been performed over 6 h of political debates). The approach brings two main benefits: the first is the possibility of analyzing potentially large amounts of conversational data with a limited effort, the second is that the model parameters provide indications on what turn-regularities are most likely to account for the presence of conflict.     

Different involvement of type 1, 2, and 3 ryanodine receptors in memory processes

The administration of the ryanodine receptor (RyR) agonist 4-Cmc (0.003-9 nmol per mouse intracerebroventricularly [i.c.v.]) ameliorated memory functions, whereas the RyR antagonist ryanodine (0.0001-1 nmol per mouse i.c.v.) induced amnesia in the mouse passive avoidance test. The role of the type 1, 2, and 3 RyR isoforms in memory processes was then evaluated by inhibiting the expression of the three RyR proteins in the mouse brain. A selective knockdown of the RyR isoforms was obtained by the i.c.v. administration of antisense oligonucleotides (aODNs) complementary to the sequence of RyR1, RyR2 and RyR3 proteins, as demonstrated by immunoblotting experiments. RyR1 (5-9 nmol per mouse i.c.v.) knockdown mice did not show any memory dysfunction. Conversely, RyR2 (1-7 nmol per mouse i.c.v.) and RyR3 (1-7 nmol per mouse i.c.v.) knockdown animals showed an impairment of memory processes. This detrimental effect was temporary and reversible, disappearing 7 d after the end of the aODN treatment. At the highest effective doses, none of the compounds used impaired motor coordination, as revealed by the rota rod test, nor modified spontaneous mobility and inspection activity, as revealed by the hole-board test. In conclusion, the lack of any involvement of cerebral RyR1 was demonstrated. These findings also showed the involvement of type 2 and type 3 RyR in the modulation of memory functions identifying these cerebral RyR isoforms as critical targets underlying memory processes.