We present a microgenetic analysis of the gestures that children produce as they talk about a balance task. Children gesture spontaneously on this task and here their hand gestures are considered in relation to the accompanying speech. By close examination of 21 children’s single sessions, and the 163 iconic gestures they produced (a mean of 7.6 gestures per child), it was found that gestures a...

This microgenetic study examined social influences on children's development of analogical reasoning during peer-led small-group discussions of stories about controversial issues. A total of 277 analogies were identified among 7,215 child turns for speaking during 54 discussions from 18 discussion groups in 6 fourth-grade classrooms (N = 120; age M=10.0, SD=0.6). Use of analogy was found to spr...

Does using our hands help us to add the value of a set of coins? We test the benefits and costs of direct interaction with a mental arithmetic task in a computerized yoked design in which groups of participants vary in their interactive mode (move vs. look) and the initial configuration of coins (pseudo-random vs. another mover’s final layout). By assessing performance and conducting a microgen...

There are plausible academic as well as social indicators that qualitative research has become an indispensable part of the methodological repertoire of the social sciences. Relying upon the tenets of the qualitative approach which require a priority of subject matter over method and a necessary socio-historical contextualization, I reconstruct some aspects of a social history that have shaped ...

Hydatid cyst caused by Echinococcus granulosus is one of the most important parasitic diseases around the world and many countries in Asia, including Iran, are involved with this infection. This disease can cause high mortality in humans as well as economic losses in livestock. To date, several molecular methods have been used to determine the genetic diversity of E. granulosus. So far, identif...

This paper expands upon previous work of the authors in the field of fiber tracking in diffusion tensor (DT) fields acquired via magnetic resonance (MR) imaging. Specifically, we now focus on tuningup a previously developed probabilistic tracking algorithm by making use of a novel genetic algorithm which helps to optimize most of the adjustable parameters of the tracking algorithm. Since the ad...