The Impact of Migration and Remittances on Household Welfare: Evidence from Vietnam

This paper examines the pattern and the impact of migration and remittances on household welfare in Vietnam using fixed-effects regressions and panel data from Vietnam Household Living Standard Surveys 2010 and 2012. Overall, the effect of migration as well as remittances on employment of remaining members of home households is small. People in households with migration and remittances tend to work less than people in other households. The effect of migration on household welfare happens mainly through remittances. If migrants do not send remittances to their home households, there are no effects of migration on welfare of home households. Remittances, especially international remittances, help receiving households increase per capita income and per capita expenditure and reduce poverty.     

Procrastination's Impact in the Workplace and the Workplace's Impact on Procrastination

Procrastination is a self‐regulatory failure, whose costs are debated. Here, we establish its impact in the workplace. Using an Internet sample, we assessed 22,053 individuals in terms of their sex, employment status, employment duration, income, occupational attainment and level of procrastination. High levels of procrastination is associated with lower salaries, shorter durations of employment, and a greater likelihood of being unemployed or under employed rather than working full‐time. Also, procrastination partially mediates sex's relationship with these work variables. Women tend to procrastinate less than men, evidently giving women an employment advantage. If women procrastinated the same as men, there should be 1.5 million fewer women in full‐time employment in the US. alone. Determining the causes of procrastination in the workplace, we also examined it at an occupational level. The results strongly support the gravitational hypothesis: jobs that require higher levels of motivational skills are less likely to retain procrastinators. However, there was some support that jobs can foster procrastination. Procrastinators tend to have jobs that are lower in intrinsically rewarding qualities.     

The ubiquity of common method variance: The case of the Big Five

The factor structures of the International Personality Item Pool (IPIP) and NEO-FFI Big Five questionnaires were examined via confirmatory factor analyses. Analyses of IPIP data for five samples and NEO data for one sample showed that a CFA model with three method bias factors, one influencing all items, one influencing negatively worded items, and one influencing positively worded items fit the data significantly better than models without method factors or models with only one method factor . With the method factors estimated, our results indicated that the Big Five dimensions may be more nearly orthogonal than previously demonstrated. Implications of the presence of method variance in Big Five scales are discussed.     

Fragile X mental retardation protein regulates heterosynaptic plasticity in the hippocampus

Silencing of a single gene, FMR1, is linked to a highly prevalent form of mental retardation, characterized by social and cognitive impairments, known as fragile X syndrome (FXS). The FMR1 gene encodes fragile X mental retardation protein (FMRP), which negatively regulates translation. Knockout of Fmr1 in mice results in enhanced long-term depression (LTD) induced by metabotropic glutamate receptor (mGluR) activation. Despite the evidence implicating FMRP in LTD, the role of FMRP in long-term potentiation (LTP) is less clear. Synaptic strength can be augmented heterosynaptically through the generation and sequestration of plasticity-related proteins, in a cell-wide manner. If heterosynaptic plasticity is altered in Fmr1 knockout (KO) mice, this may explain the cognitive deficits associated with FXS. We induced homosynaptic plasticity using the β-adrenergic receptor (β-AR) agonist, isoproterenol (ISO), which facilitated heterosynaptic LTP that was enhanced in Fmr1 KO mice relative to wild-type (WT) controls. To determine if enhanced heterosynaptic LTP in Fmr1 KO mouse hippocampus requires protein synthesis, we applied a translation inhibitor, emetine (EME). EME blocked homo- and heterosynaptic LTP in both genotypes. We also probed the roles of mTOR and ERK in boosting heterosynaptic LTP in Fmr1 KO mice. Although heterosynaptic LTP was blocked in both WT and KOs by inhibitors of mTOR and ERK, homosynaptic LTP was still enhanced following mTOR inhibition in slices from Fmr1 KO mice. Because mTOR will normally stimulate translation initiation, our results suggest that β-AR stimulation paired with derepression of translation results in enhanced heterosynaptic plasticity.     

The mediating effects of time structure on the relationships between time management behaviour,job satisfaction,and psychological well‐being

This article examined the relationship between time structure and Macan's process model of time management. This study proposed that time structure—‘appraisal of effective time usage’—would be a more parsimonious mediator than perceived control over time in the relationship between time management behaviours and outcome variables, such as job satisfaction and psychological well‐being. Alternative structure models were compared using a sample of 111 university students. Model 1 tested Macan's process model of time management with perceived control over time as the mediator. Model 2 replaced perceived control over time by the construct of time structure. Model 3 examined the possibility of perceived control over time and time structure as being parallel mediators of the relationships between time management and outcomes. Results of this study showed that Model 1 and Model 2 fitted the data equally well. On the other hand, the mediated effects were small and partial in both models. This pattern of results calls for reassessment of the process model.     

'Silent' priming of translation-dependent LTP by ß-adrenergic receptors involves phosphorylation and recruitment of AMPA receptors

The capacity for long-term changes in synaptic efficacy can be altered by prior synaptic activity, a process known as "metaplasticity." Activation of receptors for modulatory neurotransmitters can trigger downstream signaling cascades that persist beyond initial receptor activation and may thus have metaplastic effects. Because activation of β-adrenergic receptors (β-ARs) strongly enhances the induction of long-term potentiation (LTP) in the hippocampal CA1 region, we examined whether activation of these receptors also had metaplastic effects on LTP induction. Our results show that activation of β-ARs induces a protein synthesis-dependent form of metaplasticity that primes the future induction of late-phase LTP by a subthreshold stimulus. β-AR activation also induced a long-lasting increase in phosphorylation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) GluA1 subunits at a protein kinase A (PKA) site (S845) and transiently activated extracellular signal-regulated kinase (ERK). Consistent with this, inhibitors of PKA and ERK blocked the metaplastic effects of β-AR activation. β-AR activation also induced a prolonged, translation-dependent increase in cell surface levels of GluA1 subunit-containing AMPA receptors. Our results indicate that β-ARs can modulate hippocampal synaptic plasticity by priming synapses for the future induction of late-phase LTP through up-regulation of translational processes, one consequence of which is the trafficking of AMPARs to the cell surface.     

Éléments de validité de contenu des questionnaires d’intérêts Inforizon et exploration de dimensions sous-jacentes à l’organisation de facteurs d’intérêts

This study concerns the confirmatory factorial analysis test of the correspondence between a theory of the definition of the interests proposed in a list of factors and the responses from 5304 subjects in two self-evaluation questionnaires. The questionnaires were provided by a professional advice and support IT tool, Inforizon. It allows the user to explore professional worlds, according to his particular interests. The principles at work are designed to overcome difficulties regularly encountered in the use of interest scores. The empirical structure of the responses to the questionnaires appears to be compatible with the definition model. A second stage is the exploratory research of the explanatory and parsimonious dimensions of the approximately circular organisation of the interest factors.     

The Relation Between Eating- and Weight-Related Disturbances and Depression in Adolescence: A Review

Depression often emerges during adolescence and persists into adulthood. Thus, it is critical to study risk factors that contribute to the development of depression in adolescence. One set of risk factors that has been recently studied in adolescent depression research is eating- and weight-related disturbances (EWRDs). EWRDs encompass negative cognitions related to one’s body or physical appearance, negative attitudes toward eating, and unhealthy weight control behaviors. However, there have been no comprehensive reviews of EWRDs and depression research that are contextualized within developmental frameworks of adolescent depression. Thus, this review will summarize research findings on the relation between EWRDs and depression in adolescence using a cognitive vulnerability developmental framework. First, a brief overview of epidemiological findings on depression is provided in order to highlight the importance of examining depression in adolescence. Second, a cognitive vulnerability developmental framework that can be used to conceptualize depression in adolescence is described. Next, theories and findings on EWRDs and depression in adolescence are summarized within this framework. Research limitations and suggestions for future research are provided. Finally, implications of this review related to the assessment, intervention, and prevention of depression in adolescence are provided.     

Event valence and estimates of own, average person's, and randomly chosen person's risk

People typically believe they have a lower likelihood of experiencing negative events and a greater likelihood of experiencing positive events than does the average person. This effect is greater for negative than positive events. It has been proposed that this is a by-product of a tendency for estimates of the average person's likelihood to increase with the size of the group concerned. If so, event valence should affect estimates of the average person's likelihood, but not estimates of one's own likelihood or estimates of the likelihood of a person selected at random. These predictions were tested for a single event using a student sample (N = 113). Results were not in accord with the proposal. An explanation in terms of motivational processes is offered instead.     

Computer‐assisted learning for adults with profound multiple disabilities

Five adults with profound physical and intellectual disabilities were taught to respond to photographs of preferences embedded in Microsoft PowerPoint (Microsoft, 1997 ) presentations by operating microswitches that functioned as mouse clicks. Rate of responding was generally correlated with changes in types of presentation, although variability in rate was often high, and session durations were quite short. Two participants showed substantial increases in responding when fitted with switches that were easier to manipulate. This exploratory study demonstrates that people with extremely limited physical and cognitive abilities can be taught to operate switches that produce changes in visual arrays on a computer screen and sometimes differentially so. Implications for responding to photographic representations of preferences, rather than the tangible preferences themselves, are discussed. Copyright © 2004 John Wiley & Sons, Ltd.