In this contribution it is shown that Gilbert Gottlieb's theoretical contributions to developmental science, in particular his focus on individual development and his discussion of the limitations of developmental behavior genetics in this respect, are vindicated by recent theoretical developments in mathematical biology and psychometrics.

The Behavior Flexibility Rating Scale (BFRS) is designed to assess insistence on sameness or lack of behavioral flexibility, which is often associated with autism and other developmental disabilities. This study was designed to assess the factor structure of this scale for a sample of 968 individuals with autism, Asperger's syndrome, and Down…

Is infant looking behavior in ambiguous situations best described in terms of information seeking (social referencing) or as attachment behavior? Twelve-month-old infants were assigned to 1 of 2 conditions (Study 1); each infant's mother provided positive information about an ambiguous toy and an experimenter provided positive information. In…

This article presents new methods for modeling the strength of association between multiple behaviors in a behavioral sequence, particularly those involving substantively important interaction patterns. Modeling and identifying such interaction patterns becomes more complex when behaviors are assigned to more than two categories, as is the case…

Common in the research literature on bullying is the dichotomy of bullying and victim behavior. The present definition of a bully is a person who has engaged in repeated acts of aggression or harm to persons over whom he or she has power. The literature on bullies examines gender differences at length. However, the bully-victim literature has yet…

Current psychometric models of choice behavior are strongly influenced by Thurstone's (1927, 1931) experimental and statistical work on measuring and scaling preferences. Aided by advances in computational techniques, choice models can now accommodate a wide range of different data types and sources of preference variability among respondents…

Several theoretical views of automaticity are discussed. Most of these suggest that automaticity should be diagnosed by looking at the presence of features such as unintentional, uncontrolled/uncontrollable, goal independent, autonomous, purely stimulus driven, unconscious, efficient, and fast. Contemporary views further suggest that these…

General linear model procedures were used to investigate the association between financial behavior and sources of financial information, the association between savings and investing knowledge and financial information sources, and the association between financial behavior and savings and investing knowledge. The study participants were 253…

Background: In addition to the core symptoms, children with Pervasive Developmental Disorders (PDD) often exhibit other problem behaviors such as aggression, hyperactivity, and anxiety, which can contribute to overall impairment and, therefore, become the focus of clinical attention. Limited data are available on the prevalence of anxiety in these…

Many studies have documented the ways in which shyness can be a barrier to personal well-being and social adjustment throughout childhood and adolescence; however, less is known regarding shyness in emerging adulthood. Shyness as experienced during emerging adulthood may continue to be a risk factor for successful development. The purpose of this…

This study investigated the psychometric properties and predictive validity of three self-report scales (the Psychopathy Content Scale, the Psychopathy-16 scale, and the Egotistic scale) derived from the Millon Adolescent Clinical Inventory (MACI) to screen for the presence of psychopathic and narcissistic personality characteristics. Exploratory…

The attention deficit hyperactivity disorder (ADHD) symptom presentation of young adolescents with ADHD was examined in association with the transition to middle school. This study used data collected in the Multimodal Treatment Study of ADHD, which included children between 7 and 9 years of age with a diagnosis of ADHD (n = 258) and grade- and…

In this investigation mixed methods were used to examine flow within the context of a writing task. Forty-four secondary students aged between 15 and 18 years completed a computer-based writing task requiring them to examine information and then write on one of two topical issues. We examined the level of agreement between end-of-task ratings…

This study aimed at investigating the relations between students' strategic behaviour during problem solving, task performance and domain-specific self-concept. A total of 167 first- and second-graders were individually examined in tasks involving cubes assembly and in academic self-concept in mathematics. Students' cognitive, metacognitive, and…

More than five million children suffer from brain injuries each year. While the majority of these children are treated and released without permanent consequences, many children return to the classroom with lasting effects. Symptoms of brain injury can be misconstrued as common behaviour or academic problems. Therefore, teachers need to recognize…