Evidence for a dual-process account of over-imitation: Children imitate anti- and prosocial models equally, but prefer prosocial models once they become aware of multiple solutions to a task

Children imitate actions that are perceivably unnecessary to achieve the instrumental goal of an action sequence, a behavior termed over-imitation. It is debated whether this behavior is based on the motivation to follow behavioral norms and affiliate with the model or whether it can be interpreted in terms of a behavioral heuristic to copy observed intentional actions without questioning the purpose of each action step. To resolve this question, we tested whether preschool-aged children (N = 89) over-imitate a prosocial model, a helper in a prior third-party moral transgression, but refuse to over-imitate an antisocial model, the perpetrator of the moral transgression. After first observing an inefficient way to extract a reward from a puzzle box from either a perpetrator or a helper, children over-imitated the perpetrator to the same degree as they over-imitated the helper. In a second phase, children were then presented the efficient solution by the respective other model, i.e. the helper or the perpetrator. Over-imitation rates then dropped in both conditions, but remained significantly higher than in a baseline condition only when children had observed the prosocial model demonstrate the inefficient action sequence and the perpetrator performed the efficient solution. In contrast, over-imitation dropped to baseline level when the perpetrator had modelled the inefficient actions and the prosocial model subsequently showed children the efficient solution. In line with a dual-process account of over-imitation, results speak to a strong initial tendency to imitate perceivably irrelevant actions regardless of the model. Imitation behavior is then adjusted according to social motivations after deliberate consideration of different options to attain the goal.

The evolution of social dominance through reinforcement learning

Groups of social animals are often organised into dominance hierarchies that are formed through pairwise interactions. There is much experimental data on hierarchies, examining such things as winner, loser, and bystander effects, as well as the linearity and replicability of hierarchies, but there is a lack evolutionary analyses of these basic observations. Here I present a game-theory model of hierarchy formation in which individuals adjust their aggressive behaviour towards other group members through reinforcement learning. Individual traits such as the tendency to generalise learning between interactions with different individuals, the rate of learning, and the initial tendency to be aggressive are genetically determined and can be tuned by evolution. I find that evolution favours individuals with high social competence, making use of individual recognition, bystander learning and, to a limited extent, generalising learned behaviour between opponents when adjusting their behaviour towards other group members. The results are in good agreement with experimental data, for instance in finding weaker winner effects compared to loser effects.

Does Honesty Require Time? Two Preregistered Direct Replications of Experiment 2 of Shalvi, Eldar, and Bereby-Meyer (2012)

Shalvi, Eldar, and Bereby-Meyer (2012) found across two studies ( N = 72 for each) that time pressure increased cheating. These findings suggest that dishonesty comes naturally, whereas honesty requires overcoming the initial tendency to cheat. Although the study’s results were statistically significant, a Bayesian reanalysis indicates that they had low evidential strength. In a direct replication attempt of Shalvi et al.’s Experiment 2, we found that time pressure did not increase cheating, N = 428, point biserial correlation ( rpb) = .05, Bayes factor (BF)01 = 16.06. One important deviation from the original procedure, however, was the use of mass testing. In a second direct replication with small groups of participants, we found that time pressure also did not increase cheating, N = 297, rpb = .03, BF01 = 9.59. These findings indicate that the original study may have overestimated the true effect of time pressure on cheating and the generality of the effect beyond the original context.

Does honesty require time? Two preregistered replications of Experiment 2 of Shalvi, Eldar, and Bereby-Meyer (2012)

Shalvi, Eldar, and Bereby-Meyer (2012) found across two studies (each N = 72) that time-pressure increased cheating. These findings suggest that dishonesty comes naturally, while honesty requires overcoming the initial tendency to cheat. While statistically significant, a Bayesian reanalysis indicates that the original results had low evidential strength. In a replication attempt of their Experiment 2, time-pressure did not increase cheating (N = 428, rpb = 0.05, BF01 = 16.06). One important deviation from the original procedure, however, was the use of mass testing. In a second - direct - replication with small groups of participants, time pressure also did not increase cheating (N = 297, rpb = 0.03, BF01 = 9.59). These findings indicate that the original study may have overestimated the true effect of time pressure on cheating and/or the generality of the effect beyond the original context.

Early genome activation in Drosophila is extensive with an initial tendency for aborted transcripts and retained introns

Control of metazoan embryogenesis shifts from maternal to zygotic gene products as the zygotic genome becomes transcriptionally activated. In Drosophila, zygotic genome activation (ZGA) begins with a minor wave, but technical challenges have hampered the identification of early transcripts or obscured the onset of their transcription. Here, we develop an approach to isolate transcribed mRNAs and apply it over the course of the minor wave and the start of the major wave of Drosophila ZGA. Our results increase known genes of the minor wave by 10 fold and show that this wave is continuous and gradual. Transposable-element mRNAs are also produced, but discontinuously. Genes in the early and middle part of the minor wave are short with few if any introns, and their transcripts are frequently aborted and tend to have retained introns, suggesting that inefficient splicing as well as rapid cell divisions constrain the lengths of early transcripts.

The Evolution of Primate Body Size: Left-skewness, Maximum Size, and Cope’s Rule

Body size is a key physiological, ecological, and evolutionary characteristic of species. Within most major clades, body size distributions follow a right-skewed pattern where most species are relatively small while a few are orders of magnitude larger than the median size. Using a novel database of 742 extant and extinct primate species’ sizes over the past 66 million years, we find that primates exhibit the opposite pattern: a left-skewed distribution. We investigate the long-term evolution of this distribution, first showing that the initial size radiation is consistent with plesiadapiformes (an extinct group with an uncertain ancestral relationship to primates) being ancestral to modern primates. We calculate the strength of Cope’s Rule, showing an initial tendency for descendants to increase in size relative to ancestors until the trend reverses 40 million years ago. We explore when the primate size distribution becomes left-skewed and study correlations between body size patterns and climactic trends, showing that across Old and New World radiations the body size distribution initially exhibits a right-skewed pattern. Left-skewness emerged early in Old World primates in a manner consistent with a previously unidentified possible maximum body size, which may be mechanistically related to primates’ encephalization and complex social groups.

Pilihan Judul Tesis (Kajian Deskripsi Tesis Pada Universitas XYZ Di Jakarta)

<p>This study discusses the difference between thesis and dissertation according to <br />various sources. Then how to determine a good title, especially for a thesis title. <br />Furthermore, based on a sample of 1052 titles in a graduate program in Jakarta XYZ studied with methods of descriptive findings indicate that the initial tendency to use the word, then the dependent variable and the independent variables are in use. Besides, there is a tendency that is less varied methodologies, and new allegations of an error derived sequentially. There are still relatively thin presence of plagiarism that marked the memorable quote rewrite its source in the bibliography. However, they all meet the weight requirements assessed as scientific papers thesis. Based on the interim findings <br />made several suggestions for improvement in order to improve the quality of the content of the research on the above thesis. <br /> <br /><br /></p>

Psychopathic traits in adolescence: a review

Currently, and throughout the history of mental healthcare, the literature highlights that there is no agreement on the use of the terms "antisocial personality disorder" and "psychopathic personality". This paper aims to promote a debate over these concepts and their evaluation for both adults and adolescents. With this aim, a systematic review was conducted in the MedLine data base between 1968 and March 2011 using the terms "adolescent", "antisocial personality disorder", and "personality assessment". From the 59 identified articles 29 were selected to further analysis. The discussion of these terms was confirmed, as well as the importance of assessing psychopathic traits during adolescence. An initial tendency to disregard the term psychopathy and its affective implications was evidenced. However, the latest psychological instruments return to the discussion regarding the use of this diagnosis and its implications.

The role of environmental non-governmental organizations in fisheries: scientific knowledge, its value in lobbying, and its underestimation in debates aimed at solving contingent issues

Despite an initial tendency to disregard Non-Governmental Organizations (NGOs) contributions, NGOs have now entered the fishery world, where debates should be carried out on the basis of different interpretations of sound scientific data. Such an approach is expected to be obvious, but this does not prove to be always true. NGOs and the research body that produced the scientific data are confused by other stakeholders and understanding scientific publications is regarded as not necessary. Further, there is a gap between the progress of scientific knowledge and the scientific approach adopted in policy resolutions. This opens new opportunities to carry out focused scientific communication.