Genetic Change and Continuity from Fourteen to Twenty Months: The MacArthur Longitudinal Twin Study

Genetic change as well as continuity was investigated within the domains of temperament, emotion, and cognition/language for 200 pairs of twins assessed at 14 and 20 months of age in the laboratory and home. The second year of life is marked by change rather than continuity: correlations from 14 to 20 months averaged about .30 for observational measures of temperament and emotion, about .40 for language measures, and about .50 for mental development. 2 types of genetic change were examined: changes in the magnitude of genetic influence (heritability) and genetic contributions to change from 14 to 20 months. In general, heritability estimates were similar at 14 and 20 months. Evidence for genetic influence on change from 14 to 20 months emerged for several measures, implying that heritability cannot be equated with stability. Analyses of continuity indicated that genetic factors are largely responsible for continuity from 14 to 20 months.     

由3-氨基-2-卤代-2-烯亚胺制备3-卤代喹啉

紫外光照射3-氨基-2-卤代-2-烯亚胺生成3-卤代喹啉,该反应对氯代衍生物是定量反应(>95％),溴代和碘代喹啉可以较高产率从反应粗产物中容易地分离出来,由于这一反应温和、简便、干净和快速,我们预期这一反应过程将被广泛应用。     

Educational Neuromyths Among Teachers in Latin America

Neuroscientific knowledge has undeniably gained interest among educators worldwide. However, not all “brain facts” believed by teachers are supported by science. This study sought to evaluate the belief in these so‐called neuromyths among 3,451 Latin American teachers. We found that, consistent with prior research among teachers in other geographic areas, teachers in Latin America hold major misconceptions about neuroscience, especially as it relates to factual information about its structure and functioning. Differences across South American nations were observed with moderate and slight effect sizes for general knowledge of the brain and neuromyths, respectively. Teachers working in higher education had slightly superior performance. Teachers at all levels who reported knowing more about the brain, however, were more likely to believe invalid assertions known as neuromyths. These results shed light on trends in the field of education, hoping to encourage the development of strategies aimed at correcting the use of science as it relates to education. The implications regarding teaching practice, policy, and teacher training are discussed.     

Rediscovering Development in Infancy

This commentary endorses J. Kagan’s (2008) conclusion that many of the most dramatic findings on early perceptual, cognitive, and social competencies are ambiguous. It supports his call for converging research operations to disambiguate findings from single paradigms and single response indices. The commentary also argues that early competencies must be placed into a longitudinal framework, thereby allowing researchers to (a) identify whether regressive phenomena play a role in skill development, (b) understand what functions (if any) given skills play in their precocious manifestations and whether these functions are comparable in later instantiations of skills, and (c) avoid rich interpretations by identifying how robust a suspected competency is across contexts.     

The role of domain knowledge in cognitive modeling of information search

Computational cognitive models developed so far do not incorporate individual differences in domain knowledge in predicting user clicks on search result pages. We address this problem using a cognitive model of information search which enables us to use two semantic spaces having a low (non-expert semantic space) and a high (expert semantic space) amount of medical and health related information to represent respectively low and high knowledge of users in this domain. We also investigated two different processes along which one can gain a larger amount of knowledge in a domain: an evolutionary and a common core process. Simulations of model click behavior on difficult information search tasks and subsequent matching with actual behavioral data from users (divided into low and high domain knowledge groups based on a domain knowledge test) were conducted. Results showed that the efficacy of modeling for high domain knowledge participants (in terms of the number of matches between the model predictions and the actual user clicks on search result pages) was higher with the expert semantic space compared to the non-expert semantic space while for low domain knowledge participants it was the other way around. When the process of knowledge acquisition was taken into account, the effect of using a semantic space based on high domain knowledge was significant only for high domain knowledge participants, irrespective of the knowledge acquisition process. The implications of these outcomes for support tools that can be built based on these models are discussed.     

Facial patterning and infant emotional expression: happiness, surprise, and fear

Although recent studies have convincingly demonstrated that emotional expressions can be judged reliably from actor-posed facial displays, there exists little evidence that facial expressions in lifelike settings are similar to actor-posed displays, are reliable across situations designed to elicit the same emotion, or provide sufficient information to mediate consistent emotion judgments by raters. The present study therefore investigated these issues as they related to the emotions of happiness, surprise, and fear. 27 infants between 10 and 12 months of age (when emotion masking is not likely to confound results) were tested in 2 situations designed to elicit hapiness (peek-a-boo game and a collapsing toy), 2 to elicit surprise (a toy-switch and a vanishing-object task), and 2 to elicit fear (the visual cliff and the approach of a stranger. Dependent variables included changes in 28 facial response components taken from previous work using actor poses, as well as judgments of the presence of 6 discrete emotions. In addition, instrumental behaviors were used to verify with other than facial expression responses whether the predicted emotion was elicited. In contrast to previous conclusions on the subject, we found that judges were able to make all facial expression judgments reliably, even in the absence of contextual information. Support was also obtained for at least some degree of specificity of facial component response patterns, especially for happiness and surprise. Emotion judgments by raters were found to be a function of the presence of discrete facial components predicted to be linked to those emotions. Finally, almost all situations elicited blends, rather than discrete emotions.     

On the necessary relation between moral development and worldview

In this article we elaborate on the relationship between morality, moral development, moral education and capitalism. Based on Narvaez’s correct critique of the Western way of life, which is destroying the environment and may one day lead to extinction of life on Earth, we argue that this critique should not be stripped of its political side, meaning that it will not be complete if does not explicitly include capitalism as one of its roots. In the remainder of our commentary, we will try to show that in addition to heart, reason has a strong place in indigenous peoples’ life that is frequently misunderstood. Finally, and taking all this into account, we maintain that moral and citizenship education need to be critical and intercultural, and explicitly discuss economic and political issues that underlie and affect human moral development.     

Development and evaluation of a biomechanics concept inventory

To help instructors in evaluating innovations in biomechanics instruction, a standardised test of the key concepts taught in the introductory biomechanics course was developed. The Biomechanics Concept Inventory (BCI) consists of 24 questions that test four prerequisite competencies and eight biomechanics competencies. Three hundred and sixty seven students from ten universities throughout the United States took the test at the beginning and the end of the introductory biomechanics course. Analysis of a sub‐sample of the students showed that the BCI was reliable with typical errors in internal consistency and test‐retest conditions of 1.4 and 2.0 questions, respectively. Mean pre‐test scores (8.5 ± 2.0) significantly (p < 0.0001) improved to 10.5 ± 3.2 in the post‐test (n = 305). Typical biomechanics students could correctly answer half of the prerequisite questions on the pre‐test. Instruction resulted in a mean normalised gain (g) of 13.0% of maximum possible improvement that was consistent with research on traditional instruction in introductory physics courses. It was concluded that the BCI could be an effective tool to evaluate the overall effect of pedagogical strategies on student learning of key biomechanical concepts in the introductory biomechanics course.     

Student Reciprocal Peer Teaching as a Method for Active Learning: An Experience in an Electrotechnical Laboratory

Active learning is one of the most efficient mechanisms for learning, according to the psychology of learning. When students act as teachers for other students, the communication is more fluent and knowledge is transferred easier than in a traditional classroom. This teaching method is referred to in the literature as reciprocal peer teaching. In this study, the method is applied to laboratory sessions of a higher education institution course, and the students who act as teachers are referred to as “laboratory monitors.” A particular way to select the monitors and its impact in the final marks is proposed. A total of 181 students participated in the experiment, experiences with laboratory monitors are discussed, and methods for motivating and training laboratory monitors and regular students are proposed. The types of laboratory sessions that can be led by classmates are discussed. This work is related to the changes in teaching methods in the Spanish higher education system, prompted by the Bologna Process for the construction of the European Higher Education Area