PURPOSE To evaluate the effect of perspective distortion of wide-angle lenses in laparoscopes on hand-eye coordination during endoscopic manipulation. METHODS Sixteen subjects repeatedly performed a standardized positioning task in a pelvi-trainer under two conditions. The subjects had no prior experience with endoscopic manipulation. In one condition, a wide-angle lens with considerable pers...

This paper proposes a shared task for the identification of the argumentative structure in newspaper editorials. By the term “argumentative structure” we refer to the sequence of argumentative units in the text along with the relations between them. The main contribution is a large-scale dataset with more than 200 annotated editorials, which shall help argumentation mining researchers to evalua...

In the current study, we used a multi-method approach to understand quality of math homework-helping interactions between parents and their children how parents’ children’s own achievement anxiety relate interaction. Forty Canadian (ages 10–12 years; grades 5 7) completed self-report measures general anxiety. Parents standardized assessments were then recorded as they engaged in simulated homew...

The measures that are currently used to evaluate users' performances on interaction tasks in virtual environments often do not provide sufficient information for how to improve these interactions. The current paper proposes a new method for analyzing 3D goal-directed movements based on dividing them into meaningful phases. We apply the method to experimental data that we have collected earlier ...

Task persistence, measured by a composite score of independent teacher, tester and observer reports, was examined using behavioral genetic analysis. Participants included 92 monozygotic and 137 same-sex dizygotic twin pairs in Kindergarten or 1st grade (4.3 to 7.9 years old). Task persistence was widely distributed, higher among older children, positively associated with standardized tests of c...

Attentional control in children and adolescents with unilateral temporal-lobe excisions was examined using two experimental tasks, a lexical-decision and a spatial-cue task, and a standardized vigilance task. Experiment 1 tested healthy aduits on the experimental tasks to confirm that the tasks elicited expected response-time differences in valid, neutral, and invalid conditions. Experiment 2 c...

Relations between parent-child emotion talk and children's emotion understanding were examined in 63 Spanish mothers and fathers and their 4- (M = 53.35 months, SD = 3.86) and 6-year-old (M = 76.62 months, SD = 3.91) children. Parent-child emotion talk was analyzed during two storytelling tasks: a play-related storytelling task and a reminiscence task (conversation about past experiences). Chil...

The accomplishment model of average mental workload--a formal axiomatic measurement theory--was used as a basis for developing and testing secondary task indices of mental workload (H. A. Colle & G. B. Reid, 1997). Its cancellation axiom implies global sensitivity, which is an important theoretical and practical criterion for mental workload indices. Performance levels of different secondary ta...

I-Ming Chen and Joel W. Burdick Dept. of Mechanical Engineering, Mail Code 104-44, CALTECH, Pasadena, CA 91125 Abstract. A \modular" robotic system consists of standardized joint and link units that can be assembled into a number of di erent kinematic con gurations in order to meet di erent task requirements. Given a predetermined set of modules, this paper considers the problem of nding an \op...