Individual differences in cognitive plasticity: an investigation of training curves in younger and older adults

To date, cognitive intervention research has provided mixed but nevertheless promising evidence with respect to the effects of cognitive training on untrained tasks (transfer). However, the mechanisms behind learning, training effects and their predictors are not fully understood. Moreover, individual differences, which may constitute an important factor impacting training outcome, are usually neglected. We suggest investigating individual training performance across training sessions in order to gain finer-grained knowledge of training gains, on the one hand, and assessing the potential impact of predictors such as age and fluid intelligence on learning rate, on the other hand. To this aim, we propose to model individual learning curves to examine the intra-individual change in training as well as inter-individual differences in intra-individual change. We recommend introducing a latent growth curve model (LGCM) analysis, a method frequently applied to learning data but rarely used in cognitive training research. Such advanced analyses of the training phase allow identifying factors to be respected when designing effective tailor-made training interventions. To illustrate the proposed approach, a LGCM analysis using data of a 10-day working memory training study in younger and older adults is reported.     

Beyond Numbers Versus Rights: Shifting the Parameters of Debate on Temporary Labour Migration

This paper seeks to move beyond what Martin and Ruhs described as the numbers versus rights equation in temporary labour migration programs. We do this by examining the ideology of temporary labour migration. This ideology has three key elements: temporariness, labour markets and rights. The paper describes how these concepts obscure key features of temporary labour migration programs. The argument is developed by examining points of contrast between current programs in place in the USA, Canada, Australia and the UK. The paper concludes by demonstrating how unmasking the power imbalances of this ideology will lead to new policy directions.     

Separating cue encoding from target processing in the explicit task-cuing procedure: are there "true" task switch effects?

Six experiments were conducted to separate cue encoding from target processing in explicitly cued task switching to determine whether task switch effects could be separated from cue encoding effects and to determine the nature of the representations produced by cue encoding. Subjects were required to respond to the cue, indicating which cue was presented (Experiments 1, 3a, and 4a) or which task was cued (Experiments 2, 3b, and 4b), before performing the cued task on the target. Cue encoding was successfully separated from target processing when the cue response indicated which task was cued but not when it indicated which cue was presented. Task switch effects were found when this separation was successful, suggesting that there are "true" task switch effects independent of cue encoding. Analysis of the conditions required for successful separation suggested that cue encoding results in a semantic categorical representation of the task to be performed rather than verbal or phonological representations of individual cues. Implications for the authors' past modeling of task-switching performance are discussed.     

The synergy of working memory and inhibitory control: behavioral, pharmacological and neural functional evidences

Concomitant deficits in working memory and behavioral inhibition in several psychiatric disorders like attention-deficit/hyperactivity disorder, addiction or mania, suggest that common brain mechanisms may underlie their etiologies. Based on the theoretical assumption that a continuum exists between health and mental disorders, we explored the relationship between working memory and inhibition in healthy individuals, through spontaneous inter individual differences in behavior, and tested the hypothesis of a functional link through the fronto-striatal dopaminergic system. Rats were classified into three groups, showing good, intermediate and poor working memory and were compared for their inhibitory abilities. These two functions were simultaneously modulated by a dose-effect of d-amphetamine and in situ hybridization was used to quantify dopaminergic receptor (RD1) mRNAs in prefrontal cortex and striatal areas. A functional relationship between working memory and inhibition abilities was revealed. Both functions were similarly modulated by d-amphetamine according to an inverted-U shaped relationship and depending on initial individual performances. D-amphetamine selectively improved working memory and inhibition of poor and intermediate performers at low doses whereas it impaired both processes in good performers at a higher dose. D1 receptors were less expressed in prelimbic, infralimbic and anterior cingulate cortices of good compared to intermediate and poor performers, whereas no difference was observed between groups in striatal areas. The synergy of working memory and inhibitory abilities, observed in both healthy and psychiatric populations, may originate from endogenous variability in dopaminergic prefrontal cortex activity. Such findings confirm the validity of a dimensional approach, based on the concept of continuity between health and mental disorders for identifying endophenotypes of mental disorders.     

Impact of the new system of resource allocation on French public healthcare establishments

The reform of the tarification according to activity is now in place with a "T2A" rate said to be 100%, ie the hospitals are paid based on the national tariffs for a stay in hospital. The reform will continue with a list of stays for which, each year, a single tariff between the public sector and the private sector is applied. This single tariff results from the "inter-sector tariff convergence" policy which is applied.     

Addressing Challenges in Individual Psychotherapy with Delusional Patients: A Case Study

Although cognitive-behavioral treatments for schizophrenia and other psychotic disorders demonstrate strong results in clinical trials, not all patients respond to these treatments. Common challenges in psychotherapy with delusional patients include a mismatch between the therapist’s and the patient’s expectations about the purpose of therapy, the patient’s lack of motivation to reduce delusional beliefs in service of other goals, and the patient’s dependence on the delusions in order to preserve an intact sense of self. This case highlights the value of integrating a psychodynamic perspective with cognitive-behavioral interventions to address challenges in psychotherapy with chronically delusional patients.     

Working Memory Effects of Gap-Predictions in Normal Adults: An Event-Related Potentials Study

The current study examined the relationship between verbal memory span and the latency with which a filler-gap dependency is constructed. A previous behavioral study found that low span listeners did not exhibit antecedent reactivation at gap sites in relative clauses, in comparison to high verbal memory span subjects (Roberts et?al. in J Psycholinguist Res 36(2):175-188, 2007), which suggests that low span subjects are delayed at gap filling. This possibility was examined in the current study. Using an event-related potentials paradigm, it was found that low span subjects have an onset latency delay of about 200?ms in brain responses to violations of syntactic expectancies after the gap site, thus providing a time course measure of the delay hypothesized by previous literature.     

Global and local pitch perception in children with developmental dyslexia

This study investigated global versus local pitch pattern perception in children with dyslexia aged between 8 and 11 years. Children listened to two consecutive 4-tone pitch sequences while performing a same/different task. On the different trials, sequences either preserved the contour (local condition) or they violated the contour (global condition). Compared to normally developing children, dyslexics showed robust pitch perception deficits in the local but not the global condition. This finding was replicated in a simple pitch direction task, which minimizes sequencing and short term memory. Results are consistent with a left-hemisphere deficit in dyslexia because local pitch changes are supposedly processed by the left hemisphere, whereas global pitch changes are processed by the right hemisphere. The present data suggest a link between impaired pitch processing and abnormal phonological development in children with dyslexia, which makes pitch pattern processing a potent tool for early diagnosis and remediation of dyslexia.     

Birth order, sex of child, and perceptions of parental favoritism

Many studies have examined factors that influence discriminative parental solicitude. Sex, birth order, and age of the mother are a few factors demonstrated to influence levels of parental investment (especially as measured by offspring self-report). One indicator of a high level of parental investment is being a parental favorite. Using self-reports from a sample of several hundred young adults, we secured support for two hypotheses related to the influence of birth order and sex on parental favoritism. Fathers are not perceived as having a favorite child more often than are mothers, but are more likely to favor female children than are mothers. Mothers are perceived to be more likely to favor female children in blended sibships. Both mothers and fathers are perceived as favoring genetically-related children. The results also suggest that the birth order of the parental favorite varies with the birth order of the participant. Firstborns and lastborns report a pattern of favoritism that suggests parents favor firstborn and lastborn children. The discussion addresses limitations of the methodology and presents directions for future research.