When looks are everything: appearance similarity versus kind information in early induction

The goal of this research was to examine mechanisms underlying early induction--specifically, the relation between induction and categorization. Some researchers argue that even early in development, induction is based on category-membership information, whereas others argue that early induction is based primarily on similarity. Children 4 and 5 years of age participated in two types of tasks: categorization and induction. Both tasks were performed with artificial animal-like categories in which appearance was pitted against category membership. Although the children readily acquired category-membership information and subsequently used this information in categorization tasks, they ignored category membership during the induction task, relying instead on the appearance of items. These results support the idea that early in development, induction is similarity based.     

Mental representation of symbols as revealed by vocabulary errors in two bonobos (<Emphasis Type="Italic">Pan paniscus</Emphasis>)

Error analysis has been used in humans to detect implicit representations and categories in language use. The present study utilizes the same technique to report on mental representations and categories in symbol use from two bonobos (Pan paniscus). These bonobos have been shown in published reports to comprehend English at the level of a two-and-a-half year old child and to use a keyboard with over 200 visuographic symbols (lexigrams). In this study, vocabulary test errors from over 10 years of data revealed auditory, visual, and spatio-temporal generalizations (errors were more likely items that looked like sounded like, or were frequently associated with the sample item in space or in time), as well as hierarchical and conceptual categorizations. These error data, like those of humans, are a result of spontaneous responding rather than specific training and do not solely depend upon the sample mode (e.g. auditory similarity errors are not universally more frequent with an English sample, nor were visual similarity errors universally more frequent with a photograph sample). However, unlike humans, these bonobos do not make errors based on syntactical confusions (e.g. confusing semantically unrelated nouns), suggesting that they may not separate syntactical and semantic information. These data suggest that apes spontaneously create a complex, hierarchical, web of representations when exposed to a symbol system. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

A preliminary investigation of the relationship between emotion regulation difficulties and posttraumatic stress symptoms

This study examined the relationship between posttraumatic stress (PTS) symptoms and particular aspects of emotion regulation difficulties among trauma-exposed individuals. Participants were an ethnically diverse sample of 108 undergraduates from an urban university. PTS symptom severity was found to be associated with lack of emotional acceptance, difficulty engaging in goal-directed behavior when upset, impulse-control difficulties, limited access to effective emotion regulation strategies, and lack of emotional clarity. Further, overall difficulties in emotion regulation were associated with PTS symptom severity, controlling for negative affect. Finally, individuals exhibiting PTS symptoms indicative of a PTSD diagnosis reported greater difficulties with emotion regulation than those reporting PTS symptoms at a subthreshold level. The implications of these findings for research and treatment are discussed.     

Maternal depression and early positive parenting predict future conduct problems in young children with attention-deficit/hyperactivity disorder

Children with attention-deficit/hyperactivity disorder (ADHD) are at risk for adverse outcomes such as substance abuse and criminality, particularly if they develop conduct problems. Little is known about early predictors of the developmental course of conduct problems among children with ADHD, however. Parental psychopathology and parenting were assessed in 108 children who first met Diagnostic and Statistical Manual of Mental Disorders (4th ed.) criteria for ADHD at 4-7 years old. When demographic variables and baseline ADHD and conduct problems were controlled, maternal depression predicted conduct problems 2-8 years following the initial assessment, whereas positive parenting during the structured parent- child interaction task predicted fewer future conduct problems. These findings suggest that maternal depression is a risk factor, whereas early positive parenting is a protective factor, for the developmental course of conduct problems among children with ADHD.     

Repetition of Parasuicide: A Predictive Study

Medically treated parasuicides in a Norwegian county were monitored for more than 6 years, and variables predicting repetition of the parasuicide were identified. Numerous variables were found to be associated with repetition of the parasuicide when studied retrospectively. In prospective analyses of patients with no history of parasuicide, only sexual abuse (both sexes), alcohol abuse, and report of own psychiatric problems as the main concern at the time of the parasuicide (females only) were significant predictors of repetition. The results indicated that predictors of repetition are highly dependent upon the stage of the “suicidal career” the patients are in.     

Building Models for the Relationship Between Attitudes Toward Suicide and Suicidal Behavior: Based on Data from General Population Surveys in Sweden,Norway, and Russia

Our aim was to build a model delineating the relationship between attitudes toward suicide and suicidal behavior and to assess equivalence by applying the model on data from different countries. Representative samples from the general population were approached in Sweden, Norway, and Russia with the Attitudes Toward Suicide (ATTS) questionnaire. Data on experience of suicidal behavior among significant others and self‐reported suicidal expressions were also collected. Structural equation modeling resulted in gender and country specific models where experience of suicidal behavior among significant others and self‐reported suicidal expressions earlier in life predicted attitudes, and attitudes predicted current suicidal expressions. The models included the attitude factors acceptance of suicide, condemnation, and preventability; age and level of education were also incorporated. The different models reveal possible ways to better understand gender and culture‐specific paths between attitudes and suicidal behaviors, and their relevance in a suicide prevention context is considered.     

Time perception and time perspective differences between adolescents and adults

The present experiment aimed to investigate the differences in time perception and time perspective between subjects representing two developmental stages, namely adolescence and middle adulthood. Twenty Chinese adolescents aged 15–25 and twenty Chinese adults aged 35–55 participated in the study. A time discrimination task and a time reproduction task were implemented to measure the accuracy of their time perception. The Zimbardo Time Perspective Inventory (Short-Form) was adopted to assess their time orientation. It was found that adolescents performed better than adults in both the time discrimination task and the time reproduction task. Adolescents were able to differentiate different time intervals with greater accuracy and reproduce the target duration more precisely. For the time reproduction task, it was also found that adults tended to overestimate the duration of the target stimuli while adolescents were more likely to underestimate it. As regards time perspective, adults were more future-oriented than adolescents, whereas adolescents were more present-oriented than adults. No significant relationship was found between time perspective and time perception.     

Differences in practices of body stimulation during the first 3 months: Ethnotheories and behaviors of Italian mothers and West African immigrant mothers

This study investigated cultural differences, continuity and change of practices concerning body stimulation in a context of immigration. Parenting behaviors during the interaction with infants at 4, 8 and 12 weeks, and parenting ethnotheories at 12 weeks of first-generation West African immigrant mothers in Italy and autochthonous Italian mothers were compared. A qualitative inspection of ethnotheories using a thematic approach was included. As expected, results showed that immigrant mothers placed more emphasis on motor stimulation and showed longer durations of rhythmic motor and rhythmic tactile behaviors than Italian mothers; the latter placed more emphasis on tactile stimulation than immigrant mothers. The practice of motor stimulation in immigrant mothers was also adapted to values of the new context of life, becoming a positive interaction game with a mutual exchange of positive emotions. Findings express the complexity of a multidimensional process of acculturation.     

Commentary: Bashful Boys and Coy Girls: A Review of Gender Differences in Childhood Shyness

In this commentary we argue that subjective reviews of gender differences, as opposed to empirical meta-analyses, can be more affected by influences which may not yield an objective evaluation of the available evidence, including the potential overrepresentation of articles that do versus do not find gender differences and lack of a systematic evaluation of factors that influence findings. We consider theoretical bases for considering shyness to be detrimental to the development and wellbeing of girls. These include perspectives that characterize girls as being particularly affected by their personal relationships and children of both genders as influenced by patterns of same-gender interaction. Some perspectives are helpful in conceptualizing why gender difference patterns can be nuanced over the course of development, across different outcomes, contexts, and historical periods. We also briefly consider the utility of diathesis × stress and differential susceptibility models in understanding gendered patterns of adjustment. We argue that reviews of gender differences in childhood shyness should address the gender difference paradox in childhood shyness and anxiety. That is, why are gender differences in the prevalence of shyness typically absent in early to middle childhood (as concluded in the review article), but girls and women consistently demonstrate higher rates of anxiety disorders, including social anxiety disorder, than their male counterparts in adolescence and adulthood? Finally, we conclude with comments encouraging researchers to consider the potential consequences of how they convey messages about gender differences in childhood shyness. We suggest how such information can be communicated in a responsible manner.     

Influence of personality,age, sex,and estrous state on chimpanzee problem-solving success

Despite the importance of individual problem solvers for group- and individual-level fitness, the correlates of individual problem-solving success are still an open topic of investigation. In addition to demographic factors, such as age or sex, certain personality dimensions have also been revealed as reliable correlates of problem-solving by animals. Such correlates, however, have been little-studied in chimpanzees. To empirically test the influence of age, sex, estrous state, and different personality factors on chimpanzee problem-solving, we individually tested 36 captive chimpanzees with two novel foraging puzzles. We included both female (N = 24) and male (N = 12) adult chimpanzees (aged 14–47 years) in our sample. We also controlled for the females’ estrous state—a potential influence on cognitive reasoning—by testing cycling females both when their sexual swelling was maximally tumescent (associated with the luteinizing hormone surge of a female’s estrous cycle) and again when it was detumescent. Although we found no correlation between the chimpanzees’ success with either puzzle and their age or sex, the chimpanzees’ personality ratings did correlate with responses to the novel foraging puzzles. Specifically, male chimpanzees that were rated highly on the factors Methodical, Openness (to experience), and Dominance spent longer interacting with the puzzles. There was also a positive relationship between the latency of females to begin interacting with the two tasks and their rating on the factor Reactivity/Undependability. No other significant correlations were found, but we report tentative evidence for increased problem-solving success by the females when they had detumescent estrous swellings.