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Using micro-video cameras attached to the heads of 2 dogs, we examined their optical behavior while catching Frisbees. Our findings reveal that dogs use the same viewer-based navigational heuristics previously found with baseball players (i.e., maintaining the target along a linear optical trajectory, LOT, with optical speed constancy). On trials in which the Frisbee dramatically changed direction, the dog maintained an LOT with speed constancy until it apparently could no longer do so and then simply established a new LOT and optical speed until interception. This work demonstrates the use of simple control mechanisms that utilize invariant geometric properties to accomplish interceptive tasks. It confirms a common interception strategy that extends both across species and to complex target trajectories. 相似文献
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Grace E. Giles Julie A. Cantelon Marianna D. Eddy Tad T. Brunyé Heather L. Urry Holly A. Taylor Caroline R. Mahoney Robin B. Kanarek 《Motivation and emotion》2018,42(4):482-496
Emotion regulation may influence psychological responses to exercise. We examined whether the emotion regulation strategies, cognitive reappraisal and distraction, influenced psychological state and prefrontal cortex oxygenation during endurance exercise. Twenty-four endurance runners ran for 90 min at 75–85% maximum heart rate in three separate sessions with no instruction or with instructions to use cognitive reappraisal or distraction. Participants rated their emotional arousal, emotional valence, and perceived exertion before, every 30 min during, and after exercise. Functional near-infrared spectroscopy quantified changes in prefrontal cortex oxygenation. Participants felt lower emotional arousal and physical exertion when instructed to utilize cognitive reappraisal than when given no emotion regulation instruction. Such responses to distraction did not differ from the other conditions. Emotion regulation strategies did not influence emotional valence or prefrontal cortex oxygenation. Participants’ analytical interpretation of the cognitive reappraisal instruction could contribute to small effect sizes and limited effects. Further research should determine contexts under which emotion regulation strategies most benefit endurance exercise experience. 相似文献
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Patterson hypothesized that aggressive behavior develops in families when parents use coercion as the primary mode for controlling their children. The model has been tested with boys and older children. In this paper, through confirmatory factor analysis, we examine how well the coercion model generalizes to 5‐year‐old children (boys and girls). Our results suggest that the model fits the data similarly for boys and girls. Few sex differences in child antisocial behavior were found on observed or parent‐rated measures, nor were differences found in observed parent aversive responses to child behavior. This implies that similar coercion processes apply to both boys and girls. Aggr. Behav. 27:14–25, 2001. © 2001 Wiley‐Liss, Inc. 相似文献
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Gwendolyn M. Lawson Jenelle Nissley-Tsiopinis Allison Nahmias Stephanie H. McConaughy Ricardo Eiraldi 《Journal of psychopathology and behavioral assessment》2017,39(3):426-440
Parent and teacher reports of symptoms of Attention Deficit Hyperactivity Disorder (ADHD) in children often differ from each other. These informant report differences may occur in systematic ways that vary by child socioeconomic status (SES) and race, but little is known about how SES and race together relate to parent and teacher report of ADHD symptoms in school-aged children. We examined the relationship between child SES, child race and parent and teacher reports of ADHD symptoms in two samples of school-aged Caucasian and African American children being evaluated for ADHD (N = 1056; N = 317). Multivariate regression was used to predict parent and teacher reports of ADHD symptoms from child SES, race, age, gender and interaction terms. The Wald test of parameter constraints was used to test the contrast between the predictors of interest and parent and teacher report of symptoms. In the second sample, we also examined observer report measures of ADHD symptoms during one-to-one testing and in the classroom. In both samples, lower SES was associated with higher levels of inattention symptoms, as reported by teachers, but not by parents. Lower SES was also associated with higher levels of hyperactivity/impulsivity symptoms, as reported by both teachers and parents. African American race was associated with higher levels of inattention and hyperactivity/impulsivity symptoms reported by teachers than reported by parents. Observer report measures showed a different pattern of associations with SES and race. Investigating how children’s SES and race influence cross-informant agreement on ratings of children’s behavior might lead to the development of better assessment practices and more accurate diagnoses for diverse child populations. 相似文献