Fitts’ Theorem in Oculomotor Control: Dissociable Movement Times for Amplitude and Width Manipulations

The authors examined whether movement times (MT) for discrete saccades are constant given equivalent index of difficulty (ID) values (i.e., unitary nature of Fitts’ theorem). To that end, we contrasted ID/MT relations for saccades equated for ID but differing with respect to their target amplitudes and widths. Results showed that MT increased with increasing ID within amplitude and width conditions; however, the ID/MT slope was markedly steeper in the former condition. Thus, the amplitude condition imposed greater information processing demands than the width condition—a result indicating that the constituent elements of Fitts’ theorem are dissociable (i.e., nonunitary). Further, examination of saccade kinematics demonstrated that the optimal MT for a given target amplitude was largely independent of target width.     

Associations of Identity Dimensions with Big Five Personality Domains and Facets

Personality is among the most important factors contributing to individual differences in identity formation. However, previous studies mainly focused on broad personality domains and neglected more specific facets. In addition, it has only recently been recognized that identity formation is guided by multiple types of commitment and exploration. The present study aimed to remedy these limitations by relating the 30 personality facets of the NEO‐PI‐3 to five identity dimensions. In general, identity formation was especially facilitated by high levels of Conscientiousness and, to a lesser extent, also by high levels of Extraversion and low levels of Neuroticism. Openness and Agreeableness predicted greater involvement in both the positive side (i.e. exploration in breadth and depth) and negative side (i.e. ruminative exploration) of the exploration process. Personality facets and their overarching domains, as well as facets underlying the same domain, were often differentially associated with identity dimensions. Additionally, we found that some personality facets both have bright and dark sides, as they predicted both proactive identity work and a weakened sense of identity. Overall, the present study underscores the utility of multidimensional models of identity formation and points to the benefits of considering personality facets in addition to broad domains. Copyright © 2012 John Wiley & Sons, Ltd.     

Psychiatric Symptom Impairment in Children with Autism Spectrum Disorders

The general aim of this study was to examine the relation of psychiatric symptom-induced impairment with other common parameters of mental health in children with autism spectrum disorder (ASD). Prevalence rates are used to illustrate the implications of different criteria for caseness. Parents/teachers completed DSM-IV-referenced rating scales for 6–12 year old children with ASD (N?=?115), the majority of whom were boys (86 %). Most children were rated by parents (81 %) or teachers (86 %) as being socially or academically impaired by symptoms of at least one psychiatric disorder. The most common impairing conditions (parent/teacher) were attention-deficit/hyperactivity disorder (67 %/71 %), oppositional defiant disorder (35 %/33 %), and anxiety disorder (47 %/34 %), and the combined rates based on either informant were generally much higher. Agreement between symptom cutoff and impairment cutoff was acceptable for most disorders. A larger percentage of youth were impaired by psychiatric symptoms than met symptom cutoff criteria, and the discrepancy between impairment cutoff and clinical cutoff (impairment cutoff plus symptom cutoff) was even greater. Impairment was moderately to highly correlated with both number and severity of symptoms. Parents’ and teachers’ ratings indicated little agreement as to whether a child was impaired. Findings for youth with ASD were similar to non ASD child psychiatry outpatient referrals, but clearly different in several ways from comparable studies of community-based samples.     

Attractiveness and cost as mediating variables in the performer-judge relation: An extension of the reward-cost model

An attempt was made to extend social exchange theory to a situation in which the outcomes available for exchanges were of qualitatively different sorts. Male Ss judged the creativity of sentences constructed by female accomplices under conditions of high versus low ‘attractiveness’ (presence or absence of smiling and eye contact) of the accomplice and high versus low cost of judgemental accuracy to the S. An interaction between Attractiveness × Cost was predicted and found in experiment 1. Experiment 2 replicated that finding and added two control conditions. The results indicated that for the high attractiveness manipulation the positive reciprocity tendency which occurred under low cost was not found under higher cost. In addition, both studies showed a non-significant negative reciprocity tendency under high attractiveness and high cost. Jones' theory of ingratiation was examined for its relevancy, but it does not appear to be more appropriate in this situation than the reward-cost model.     

The puzzle of language evolution

Zusammenfassung. Die Sprachwissenschaft muß sich wieder auf den evolutionären Aspekt der Sprache konzentrieren, damit Sprachmodelle in bezug auf menschliche natürliche Sprachen realistischer und überzeugungskräftiger werden. Multiagent-Systeme werden als ein möglicher Weg zur Entwicklung solcher evolutionärer Modelle vorgeschlagen, und es wird ein Beispiel eines konkreten Experiments über Ursprung und Entwicklung der Semantik auf der Grundlage einer Multi-agent-Methode gegeben. Abstract. Linguistics must again concentrate on the evolutionary nature of language, so that language models are more realistic with respect to human natural languages and have a greater explanatory force. Multi-agent systems are proposed as a possible route to develop such evolutionary models and an example is given of a concrete experiment in the origins and evolution of word-meaning based on a multi-agent approach.     

Lonely Adolescents and Their Best Friend: An Examination of Loneliness and Friendship Quality in Best Friendship Dyads

Friendship experiences have been shown to be important predictors of adolescents’ loneliness. The current study examined selection and socialization effects of loneliness within reciprocal best friendships, while controlling for friendship quality. Analyses were conducted on a sample of 884 adolescents (42.08% boys), making up 442 dyads, who were on average 13.51 years old (SD?=?1.37). Adolescents completed the peer-related loneliness subscale of the Loneliness and Aloneness Scale for Children and Adolescents as well as the Friendship Qualities Scale. A longitudinal actor-partner interdependence model, which accounts for the interdependencies in the data of best friends, suggested the presence of a selection effect for loneliness but no socialization effect. This finding within best friendships contrasts with studies on friendship networks where both selection and socialization were established.