This study investigated the effectiveness of spatial-visualization-based instruction on the mathematical problem-solving performance of 35 mathematics education students using one-group pretest-posttest quasi-experime...This study investigated the effectiveness of spatial-visualization-based instruction on the mathematical problem-solving performance of 35 mathematics education students using one-group pretest-posttest quasi-experimental design. It also aimed to describe how spatial visualization is applied in solving mathematical problems. The findings of the study revealed that spatial-visualization-based instruction improved the mathematical problem-solving performance of students. The spatial-visualization ability can be applied in solving mathematical problems.展开更多
Recent studies describe a number of difficulties associated with attention deficit in children with reading disabilities. Information about visual-spatial attention mainly arises from studies using event-related poten...Recent studies describe a number of difficulties associated with attention deficit in children with reading disabilities. Information about visual-spatial attention mainly arises from studies using event-related potentials (ERPs) during Posner’s spatial cueing paradigm. This study aims to use neurofeedback with a special protocol for treating children with reading disabilities, and moreo-ver, to evaluate visual-spatial attention ability by means of Posner paradigm task and ERPs. The study was conducted in a single subject design in 20 sessions. Participants were 2 male children, aged between 10 - 12 years old, who completed twelve 30-min neurofeedback sessions. Repeated measurements were performed during the baseline, treatment, and post treatment phases. Results showed some improvement in Posner paradigm parameters (correct response, valid and invalid reaction times). Furthermore, grand average ERPs for both of the participants in each of the four conditions (Valid-right, Invalid-right, Valid-left and Invalid-left) were analyzed. The analysis of P3 component showed a reduction in latency, indicating an improvement in the timing of cognitive processes. In addition, the graphs showed a decrease in amplitude level, which meant easier processing than before.展开更多
Screening patients for psychotic features can pose a problem when using verbal based tests. Establishment of validity of non-verbal psychotic screening scale can enhance diagnostic specificity and address challenges a...Screening patients for psychotic features can pose a problem when using verbal based tests. Establishment of validity of non-verbal psychotic screening scale can enhance diagnostic specificity and address challenges associated with verbal based tests. The goal of this study is to check whether Bender Visual Motor Gestalt Test-II will serve as a diagnostic specific tool for distinguishing between psychotic patients and healthy population. A total of 40 participants 22 males and 18 females were employed in the study. They were made of 10 patients diagnosed with schizophrenia, another 10 with depressions associated with psychotic features, 10 with substance/medication induced disorders and 10 healthy adults as the control. Their ages ranged from 20 - 65 with a mean age of 35.70 and standard deviation of 6.04. The healthy control group was staff of the hospital that was comparable to the patients in terms of age, gender and studies. All participants available who met the inclusive criteria who were willing to participate were selected. The instruments were (BVMGT-II) and (WHODAS 2.0). The design of the study was between group designs and One Way ANOVA was employed for data analysis. The findings of the study showed that BVMGT-II discriminated between patients with psychotic disorder and healthy population. It is recommended that BVMGT-II should be employed as screening instrument by the clinical/neuropsychologists in clinical psychological assessment for distinguishing psychotic patients from healthy population.展开更多
目的:研究单眼屈光参差性弱视患者对一阶光栅锐度和二阶纹理敏感度的感知能力。方法:收集2018-01/2022-12于我院确诊的单眼屈光参差性弱视儿童715例715眼作为弱视组,另选取矫正视力正常儿童745例745眼作为正常对照组。分别检测最佳矫正...目的:研究单眼屈光参差性弱视患者对一阶光栅锐度和二阶纹理敏感度的感知能力。方法:收集2018-01/2022-12于我院确诊的单眼屈光参差性弱视儿童715例715眼作为弱视组,另选取矫正视力正常儿童745例745眼作为正常对照组。分别检测最佳矫正视力(BCVA)、一阶光栅锐度和(或)二阶纹理敏感度,并分析不同程度弱视患者对一阶光栅锐度和二阶纹理敏感度的感知能力。结果:弱视组与正常对照组一阶光栅锐度(11.58±6.10 vs 20.27±3.47,P<0.001)、二阶纹理敏感度(0.33±0.16 vs 0.12±0.04,P<0.001)均有明显差异,且轻中度弱视患者与重度弱视患者一阶光栅锐度(12.10±6.23 vs 8.13±3.70,P<0.001)和二阶纹理敏感度(0.32±0.16 vs 0.37±0.17,P<0.05)均有明显差异。结论:单眼屈光参差性弱视患者大脑皮层一阶视觉通路和二阶视觉通路均存在不同程度的损伤,重度弱视患者较轻中度弱视患者损伤更为严重。展开更多
随着机器人技术的发展,仿人机器人在多个领域展现出应用潜力和价值。针对仿人机器人,基于机器视觉进行自主抓取研究,旨在提高仿人机器人在自然环境中的抓取适应能力和动作仿人性。在机器视觉方面,硬件采用Realsense-D435深度摄像头,利用...随着机器人技术的发展,仿人机器人在多个领域展现出应用潜力和价值。针对仿人机器人,基于机器视觉进行自主抓取研究,旨在提高仿人机器人在自然环境中的抓取适应能力和动作仿人性。在机器视觉方面,硬件采用Realsense-D435深度摄像头,利用YOLO(You Only Look Once)物体检测模型实现目标物体的识别、空间定位、深度图裁切和目标点云生成,并根据目标点云与标准点云的配准算法(ICP)获取物体的姿态,通过D-H法对机器人头部进行建模,将物体的位置和姿态由相机坐标系转换为机器人坐标系。在运动规划上,参照人手臂的抓取规律,将抓取过程分为9个基础动作:初始位、移动至预抓取位、抓取物体、提起物体、搬运物体、移动至放置位、放置物体、退出位和回到初始位,针对不同物体确定对应抓取姿态,以提高抓取成功率,根据视觉获取的抓取点和放置点,自主计算余下的关键点,并以空间弧形作为抓取轨迹,通过Matlab仿真,验证抓取过程机械臂末端运动轨迹和关节轨迹的合理性。最后进行物体抓取实验,结果表明,仿人机器人在自然环境中能够快速准确地识别和定位不同物体,并能成功进行抓取和搬运,成功率均在80%以上,并且能够兼顾动作的仿人性,验证了所提出方案的有效性。本研究可促进仿人机器人在人类日常生活中的应用和普及。展开更多
文摘This study investigated the effectiveness of spatial-visualization-based instruction on the mathematical problem-solving performance of 35 mathematics education students using one-group pretest-posttest quasi-experimental design. It also aimed to describe how spatial visualization is applied in solving mathematical problems. The findings of the study revealed that spatial-visualization-based instruction improved the mathematical problem-solving performance of students. The spatial-visualization ability can be applied in solving mathematical problems.
文摘Recent studies describe a number of difficulties associated with attention deficit in children with reading disabilities. Information about visual-spatial attention mainly arises from studies using event-related potentials (ERPs) during Posner’s spatial cueing paradigm. This study aims to use neurofeedback with a special protocol for treating children with reading disabilities, and moreo-ver, to evaluate visual-spatial attention ability by means of Posner paradigm task and ERPs. The study was conducted in a single subject design in 20 sessions. Participants were 2 male children, aged between 10 - 12 years old, who completed twelve 30-min neurofeedback sessions. Repeated measurements were performed during the baseline, treatment, and post treatment phases. Results showed some improvement in Posner paradigm parameters (correct response, valid and invalid reaction times). Furthermore, grand average ERPs for both of the participants in each of the four conditions (Valid-right, Invalid-right, Valid-left and Invalid-left) were analyzed. The analysis of P3 component showed a reduction in latency, indicating an improvement in the timing of cognitive processes. In addition, the graphs showed a decrease in amplitude level, which meant easier processing than before.
文摘Screening patients for psychotic features can pose a problem when using verbal based tests. Establishment of validity of non-verbal psychotic screening scale can enhance diagnostic specificity and address challenges associated with verbal based tests. The goal of this study is to check whether Bender Visual Motor Gestalt Test-II will serve as a diagnostic specific tool for distinguishing between psychotic patients and healthy population. A total of 40 participants 22 males and 18 females were employed in the study. They were made of 10 patients diagnosed with schizophrenia, another 10 with depressions associated with psychotic features, 10 with substance/medication induced disorders and 10 healthy adults as the control. Their ages ranged from 20 - 65 with a mean age of 35.70 and standard deviation of 6.04. The healthy control group was staff of the hospital that was comparable to the patients in terms of age, gender and studies. All participants available who met the inclusive criteria who were willing to participate were selected. The instruments were (BVMGT-II) and (WHODAS 2.0). The design of the study was between group designs and One Way ANOVA was employed for data analysis. The findings of the study showed that BVMGT-II discriminated between patients with psychotic disorder and healthy population. It is recommended that BVMGT-II should be employed as screening instrument by the clinical/neuropsychologists in clinical psychological assessment for distinguishing psychotic patients from healthy population.
文摘目的:研究单眼屈光参差性弱视患者对一阶光栅锐度和二阶纹理敏感度的感知能力。方法:收集2018-01/2022-12于我院确诊的单眼屈光参差性弱视儿童715例715眼作为弱视组,另选取矫正视力正常儿童745例745眼作为正常对照组。分别检测最佳矫正视力(BCVA)、一阶光栅锐度和(或)二阶纹理敏感度,并分析不同程度弱视患者对一阶光栅锐度和二阶纹理敏感度的感知能力。结果:弱视组与正常对照组一阶光栅锐度(11.58±6.10 vs 20.27±3.47,P<0.001)、二阶纹理敏感度(0.33±0.16 vs 0.12±0.04,P<0.001)均有明显差异,且轻中度弱视患者与重度弱视患者一阶光栅锐度(12.10±6.23 vs 8.13±3.70,P<0.001)和二阶纹理敏感度(0.32±0.16 vs 0.37±0.17,P<0.05)均有明显差异。结论:单眼屈光参差性弱视患者大脑皮层一阶视觉通路和二阶视觉通路均存在不同程度的损伤,重度弱视患者较轻中度弱视患者损伤更为严重。
文摘随着机器人技术的发展,仿人机器人在多个领域展现出应用潜力和价值。针对仿人机器人,基于机器视觉进行自主抓取研究,旨在提高仿人机器人在自然环境中的抓取适应能力和动作仿人性。在机器视觉方面,硬件采用Realsense-D435深度摄像头,利用YOLO(You Only Look Once)物体检测模型实现目标物体的识别、空间定位、深度图裁切和目标点云生成,并根据目标点云与标准点云的配准算法(ICP)获取物体的姿态,通过D-H法对机器人头部进行建模,将物体的位置和姿态由相机坐标系转换为机器人坐标系。在运动规划上,参照人手臂的抓取规律,将抓取过程分为9个基础动作:初始位、移动至预抓取位、抓取物体、提起物体、搬运物体、移动至放置位、放置物体、退出位和回到初始位,针对不同物体确定对应抓取姿态,以提高抓取成功率,根据视觉获取的抓取点和放置点,自主计算余下的关键点,并以空间弧形作为抓取轨迹,通过Matlab仿真,验证抓取过程机械臂末端运动轨迹和关节轨迹的合理性。最后进行物体抓取实验,结果表明,仿人机器人在自然环境中能够快速准确地识别和定位不同物体,并能成功进行抓取和搬运,成功率均在80%以上,并且能够兼顾动作的仿人性,验证了所提出方案的有效性。本研究可促进仿人机器人在人类日常生活中的应用和普及。
