Response Inhibition in Preschoolers at Familial Risk for Attention Deficit Hyperactivity Disorder: A Behavioral and Electrophysiological Stop‐Signal Study

Children participating in the Ben‐Gurion Infant Development Study were assessed with a dynamic‐tracking version of the stop‐signal task at the age of 5 years. The sample consisted of 60 males. Stop‐signal reaction time (SSRT) was correlated with concurrent ratings of the child's attention deficit hyperactivity disorder (ADHD) symptoms. Paternal symptoms measured in the child's early infancy predicted the child's performance in the stop‐signal task: Paternal inattentiveness predicted SSRT, whereas hyperactivity predicted error proportion. Maternal symptoms were not correlated with the performance of the child in the task. A subsample of children, who were tested while electrophysiological brain activity was measured, showed that having higher ADHD symptomatology, especially hyperactivity, correlated with less activity in the brain areas that are usually recruited by children for successful inhibition.     

The Caregiving Environment and Developmental Outcomes of Preterm Infants: Diathesis Stress or Differential Susceptibility Effects?

The interactions between premature birth and the caregiving environment on infants' cognitive and social functioning were examined. Participants were 150 infants (83 preterm, 67 full‐term) and their parents. When infants were 6 months old, parents reported on their levels of emotional distress, and triadic family interactions were filmed and coded. At 12 months of age, the infants' cognitive and social functioning was assessed. Prematurity moderated the effects of maternal (but not paternal) emotional distress and triadic interactions on infants' cognitive and social outcomes. Whereas for cognitive functioning the interactions were consistent with a diathesis–stress approach, for social functioning the interactions were consistent with a differential susceptibility approach. The differential effects of the caregiving environment between groups and outcomes are discussed.     

Does Augmented Visual Feedback from Novel,Multicolored, Three-Dimensional-Printed Teeth Affect Dental Students' Acquisition of Manual Skills?

Although three-dimensional (3D) printing technology is increasingly used in dental education, its application regarding the provision of online visual augmented feedback has not been tested. Thus, this study aimed to: (1) develop two generations of multicolored 3D-printed teeth that provide visual augmented feedback for students conducting the cavity preparation process, (2) assess students' clinical performance after training on the 3D models, and (3) acquire student feedback. For the first-generation model, augmented feedback was obtained from five 3D-printed teeth models for five cavity preparation procedures. Each model comprised three layers printed in green, yellow, and red indicating whether preparation was acceptable, limited, or unacceptable, respectively. The study used a crossover design in which the experimental group trained on five multicolored models and 10 standard plastic teeth, and the control group trained on 15 standard plastic teeth. Students gave positive feedback of the methodology but complained about the printed material's hardness. Therefore, a second-generation model was developed: the model's occlusal plane was replaced with a harder printed acrylic material, and the experiment was repeated. During training, instructors provided external terminal feedback only for performance on standard plastic teeth. Manual grades for cavity preparations on standard plastic teeth were compared. No significant differences were found between the control and experimental groups in both generations' models. However, less instructor time was needed, and similar clinical results were obtained after training with both generations. Thus, multicolored 3D-printed teeth models promote self-learning during the process of acquiring manual skills and reduce student dependency on instructors.     

Prematurity,maternal emotional distress,and infant social responsiveness among Arab-Bedouin families: The role of social support as a resilience factor

This study investigated predictors of early infant social development and the role of social support as a resilience factor among Arab-Bedouin families. We propose a mediation model in which social support will be related to maternal postpartum emotional distress (PPED), which in turn will be related to infant social responsiveness. One hundred five Arab-Bedouin mothers (age range = 17–44 years) and their preterm (n = 48) and full-term (n = 57) infants were recruited shortly after birth and were followed up at age 12 months. Findings demonstrate that, among the preterm group, higher levels of social support predicted lower levels of maternal PPED, and this, in turn, predicted higher levels of infant social responsiveness.     

Opting in and Creating Demand: Why Young People Choose to Teach Mathematics to Each Other

Journal of Science Education and Technology - Access to science, technology, engineering, and mathematics fields serves as a key entry point to economic mobility and civic enfranchisement. Such...     

Is the disappointment in the implementation of a new science curricula justified?: A study quantifying descriptive data

This study investigated the reasons behind the lack of enthusiasm among teachers in implementing a new biology curriculum in Israel. Classroom observations of 42 junior high school teachers in 28 schools revealed that the curriculum developers succeeded in transmitting most of their curriculum objectives. The data indicated three possible reasons, however, for teachers' disappointment: (a) The high expectations set at the ideal level regarding the inquiry approach; (b) The greater role given to verbalization in a biology curriculum, and (c) Dull implementation (routine and nonenthusiastic), which occurs when teachers are too faithful to the teaching text. Four variables—objectives, materials, strategy, and activities—were chosen in order to analyze the learning materials. The variables, and their sub-variables, were scored in terms of the ideal, formal, and operational levels of the curriculum. To score the qualitative implementation data, two new instruments were developed. The first, an analytical instrument, analyzed instructional materials in terms of the frequency and intensity of their use. The second instrument, an observational one, was used to estimate classroom implementation fidelity.