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A linguistic and cognitive process that has received scant attention in mainstream developmental psychology is the use of a geocentric frame of spatial reference, which amounts to using a large-scale orientation system (such as cardinal directions) in describing and encoding the location of objects on table space, inside a room. As part of a larger cross-cultural study of the development of this process, in India, Indonesia and Nepal, we present here a study on the possible implications of using a geocentric frame of reference in developing an accurate dead-reckoning skill. Children aged 11 to 15 years in two types of schools in Varanasi, India, who were known from a pretest to use a geocentric frame in language and cognition, were blindfolded, spun around and led blindfolded to a second room. A majority of them were able to keep track of cardinal directions despite these disorienting procedures. They were interviewed about the processes and sources of their skill. [ABSTRACT FROM AUTHOR]

The study of the orientation systems that people use in different cultures to describe the location of objects in space has drawn some interest of researchers in the fields of anthropology, psycholinguistics, and cognitive psychology. There has been a rethinking of the "linguistic relativity hypothesis," and some empirical studies tend to support the notion that language is the major determinant of encoding and cognitive performance on spatial tasks. This paper reports a crosscultural study carried out with 545 children aged 4 to 14 years, both schooled and unschooled, in India and Nepal. The field sites were selected taking into consideration how reference to spatial locations is organized in the language as well as in the local cultural practices. In a village near Varanansi in India, people organize spatial locations mainly with reference to cardinal directions, but in the city of Varanasi, relative references are also used, although people in both the locations speak the same language (i.e., Hindi). In a village in Nepal, on the other hand, the "uphill-downhill" geocentric frame of reference is the most compelling. We test the relationship between ecology, culture, and language, encoding of spatial information, and performance on some Piagetian spatial tasks, taking age and schooling into account. Berry's eco-cultural model is used to discuss the findings that support linguistic relativism at the group but not at the individual level. [ABSTRACT FROM AUTHOR]

Infection of the skin or throat by Streptococcus dysgalactiae subspecies equisimilis (SDSE) may result in a number of human diseases. To understand mechanisms that give rise to new genetic variants in this species, we used multi-locus sequence typing (MLST) to characterise relationships in the SDSE population from India, a country where streptococcal disease is endemic. The study revealed Indian SDSE isolates have sequence types (STs) predominantly different to those reported from other regions of the world. Emm-ST combinations in India are also largely unique. Split decomposition analysis, the presence of emm-types in unrelated clonal complexes, and analysis of phylogenetic trees based on concatenated sequences all reveal an extensive history of recombination within the population. The ratio of recombination to mutation (r/m) events (11:1) and per site r/m ratio (41:1) in this population is twice as high as reported for SDSE from non-endemic regions. Recombination involving the emm-gene is also more frequent than recombination involving housekeeping genes, consistent with diversification of M proteins offering selective advantages to the pathogen. Our data demonstrate that genetic recombination in endemic regions is more frequent than non-endemic regions, and gives rise to novel local SDSE variants, some of which may have increased fitness or pathogenic potential.