Comparing Word Processing Times in Naming, Lexical Decision, and Progressive Demasking: Evidence from Chronolex

We report performance measures for lexical decision (LD), word naming (NMG), and progressive demasking (PDM) for a large sample of monosyllabic monomorphemic French words (N = 1,482). We compare the tasks and also examine the impact of word length, word frequency, initial phoneme, orthographic and phonological distance to neighbors, age-of-acquisition, and subjective frequency. Our results show that objective word frequency is by far the most important variable to predict reaction times in LD. For word naming, it is the first phoneme. PDM was more influenced by a semantic variable (word imageability) than LD, but was also affected to a much greater extent by perceptual variables (word length, first phoneme/letters). This may reduce its usefulness as a psycholinguistic word recognition task

MEGALEX:A megastudy of visual and auditory word recognition

Using the megastudy approach, we report a new database (MEGALEX) of visual and auditory lexical decision times and accuracy rates for tens of thousands of words. We collected visual lexical decision data for 28,466 French words and the same number of pseudowords, and auditory lexical decision data for 17,876 French words and the same number of pseudowords (synthesized tokens were used for the auditory modality). This constitutes the first large-scale database for auditory lexical decision, and the first database to enable a direct comparison of word recognition in different modalities. Different regression analyses were conducted to illustrate potential ways to exploit this megastudy database. First, we compared the proportions of variance accounted for by five word frequency measures. Second, we conducted item-level regression analyses to examine the relative importance of the lexical variables influencing performance in the different modalities (visual and auditory). Finally, we compared the similarities and differences between the two modalities. All data are freely available on our website ( https://sedufau.shinyapps.io/megalex/ ) and are searchable at www.lexique.org , inside the Open Lexique search engine

Metabarcoding data reveal vertical multitaxa variation in topsoil communities during the colonization of deglaciated forelands

Ice-free areas are expanding worldwide due to dramatic glacier shrinkage and are undergoing rapid colonization by multiple lifeforms, thus representing key environments to study ecosystem development. It has been proposed that the colonization dynamics of deglaciated terrains is different between surface and deep soils but that the heterogeneity between communities inhabiting surface and deep soils decreases through time. Nevertheless, tests of this hypothesis remain scarce, and it is unclear whether patterns are consistent among different taxonomic groups. Here, we used environmental DNA metabarcoding to test whether community diversity and composition of six groups (Eukaryota, Bacteria, Mycota, Collembola, Insecta, and Oligochaeta) differ between the surface (0–5 cm) and deeper (7.5–20 cm) soil at different stages of development and across five Alpine glaciers. Taxonomic diversity increased with time since glacier retreat and with soil evolution. The pattern was consistent across groups and soil depths. For Eukaryota and Mycota, alpha-diversity was highest at the surface. Time since glacier retreat explained more variation of community composition than depth. Beta-diversity between surface and deep layers decreased with time since glacier retreat, supporting the hypothesis that the first 20 cm of soil tends to homogenize through time. Several molecular operational taxonomic units of bacteria and fungi were significant indicators of specific depths and/or soil development stages, confirming the strong functional variation of microbial communities through time and depth. The complexity of community patterns highlights the importance of integrating information from multiple taxonomic groups to unravel community variation in response to ongoing global changes

Regioisomeric and substituent effects upon the outcome of the reaction of 1-borodienes with nitrosoarene compounds

A study of the reactivity of 1-borodienes with nitrosoarene compounds has been carried out showing an outcome that differs according to the hybridization state of the boron moiety. Using an sp2 boron substituent, a one-pot hetero-Diels–Alder/ring contraction cascade occurred to afford N-arylpyrroles with low to good yields depending on the electronic properties of the substituents on the borodiene, whereas an sp3 boron substituent led to the formation of stable boro-oxazines with high regioselectivity in most of the cases, in moderate to good yields. 1H and 11B NMR studies on two boro-oxazine regioisomers showed that selective deprotection can be performed. Formation of either the pyrrole or the furan derivative is pH- and regioisomer-structure-dependent. The results obtained, together with previous B3LYP calculations, support mechanistic proposals which suggest that pyrrole, or furan, formation proceeds via oxazine formation, followed by a boryl rearrangement and an intramolecular addition–elimination sequence

Dynamique d'acteurs ( agriculteurs et institutions) et innovation agro-écologique pour la gestion des risques environnementaux en Guadeloupe

[Departement_IRSTEA]Territoires [TR1_IRSTEA]DTAM [TR2_IRSTEA]SYNERGIEDans le contexte de crise économique et environnementale qui touche la filière banane à la Guadeloupe, l'objectif de cette contribution est d'engager une réflexion sur l'organisation d'acteurs à l'origine des innovations agro-écologiques. Nous interrogeons les dynamiques d'acteurs face aux crises et perturbations qui touchent l'agriculture antillaise, par le biais de l'organisation qu'ils mettent en place pour accompagner le changement. Des entretiens menés d'une part auprès d'un groupe de planteurs de bananes, d'autre part auprès des institutions en charge de la question environnementale sur l'île, ont permis de faire émerger trois principales conclusions sur la nature des innovations mises en oeuvre face aux crises environnementale et économique, leur échelle d'application et les forces motrices qui les sous-tendent : du point de vue technique, la mise en oeuvre de nouvelles pratiques indépendamment des échanges entre agriculteurs ; du point de vue stratégique, des changements d'orientation productive en liaison avec une forte dynamique d'échanges ; au niveau des institutions, de nouveaux lieux de dialogue. D'une manière générale, il apparaît qu'il y a un décalage dans la dynamique de concertation selon les niveaux d'organisation (agriculteurs vs institutions) et le lien entre ces deux niveaux d'organisation semble peu existant. / The aim of our research is to urge a reflexion on the agro-ecological innovations to manage the environmental risks. We analyse the organization that the stakeholders (farmers and institutions) set up facing the crises and disturbances which touch the agriculture of French West Indies. To do this, we enquired a group of farmers of banana production in Guadeloupe, and also the agricultural and environmental institutions of this island. This made it possible to identify three principal conclusions on the nature of the innovations, their scale of application and the driving forces which underlie them: from a technical point of view, new practices are implemented independently of the exchanges between farmers; from a strategic point of view, changes of production are made, depending on exchanges dynamic; on the level of the institutions, new places of dialogue are created. In conclusion, there is a shift in the dynamics of dialogue according to the levels of organization (farmers versus institutions) and the bond between these two levels of organization seems to be very thin

Dynamique d’acteurs (agriculteurs et institutions) et innovation agro-écologique pour la gestion des risques environnementaux en Guadeloupe

The aim of our research is to urge a reflexion on the agro-ecological innovations to manage the environmental risks. We analyse the organization that the stakeholders (farmers and institutions) set up facing the crises and disturbances which touch the agriculture of French West Indies. To do this, we enquired a group of farmers of banana production in Guadeloupe, and also the agricultural and environmental institutions of this island. This made it possible to identify three principal conclusions on the nature of the innovations, their scale of application and the driving forces which underlie them: from a technical point of view, new practices are implemented independently of the exchanges between farmers; from a strategic point of view, changes of production are made, depending on exchanges dynamic; on the level of the institutions, new places of dialogue are created. In conclusion, there is a shift in the dynamics of dialogue according to the levels of organization (farmers versus institutions) and the bond between these two levels of organization seems to be very thin