The Experts below are selected from a list of 11748 Experts worldwide ranked by ideXlab platform
Leonard A Rosenblum - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of video of conspecifics as a reward for socially housed bonnet macaques macaca radiata
Perceptual and Motor Skills, 2004Co-Authors: Elizabeth M Brannon, Michael W Andrews, Leonard A RosenblumAbstract:Two experiments were conducted to examine the effectiveness of presenting brief video of conspecifics to socially housed bonnet macaques as a reward for performing a Joystick task. Using a Joystick, subjects tracked a moving target with the cursor on a computer monitor. In Exp. 1, subjects completed significantly more Joystick trials for food reward than for video reward or no reward. Subjects also preferred viewing video of another group (Other Group Video) to receiving no reward or to viewing video of their own group (Own Group Video). In Exp. 2, subjects were given two reward conditions, video of a familiar social group or video of a new social group. Two monkeys contributed the vast majority of trials, and both responded more frequently when the reward was video of the new social group. Results of these two experiments suggest that viewing video of conspecifics may serve as an effective reward for at least some socially housed primates and suggests that novelty of the individuals depicted in the video is an important factor contributing to the reward value of video.
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automated recording of individual performance and hand preference during Joystick task acquisition in group living bonnet macaques macaca radiata
Journal of Comparative Psychology, 1994Co-Authors: Michael W Andrews, Leonard A RosenblumAbstract:A microchip that provided a unique identification number was injected into each forearm of all 8 members of a bonnet macaque (Macaca radiata) social group. The group was then given computer-controlled Joystick tasks of increasing difficulty. The identification number of the arm used on each trial was input into the computer and used to determine individual performance and hand preference in more than 23,000 trials. Three subjects reversed hand preference as task difficulty was increased over time. All subjects exhibited nearly exclusive use of a single hand on the most difficult task; 6 used the right hand, and 2 used the left. Daily patterns of Joystick activity for the group members differed somewhat from that of our individually housed monkeys.
Hironao Yamada - One of the best experts on this subject based on the ideXlab platform.
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haptic interaction in tele operation control system of construction robot based on virtual reality
International Conference on Mechatronics and Automation, 2009Co-Authors: Xinxing Tang, Dingxuan Zhao, Hironao YamadaAbstract:In this paper, a tele-operation control system of construction robot (TCSCR) with the master-slave control form is presented, which consists of a construction robot controlled by servo valve, and two Joysticks for operating the robot from a remote place, and 3-dimensional virtual working environment based on the virtual reality technology. The tele-operation technology employing virtual reality, improves the task efficiency of a conventional TCSCR by giving the operator a feeling of being at the actual operate site in real-time. However, for those without experience person, it is dangerous to operate and manipulate a remote construction robot (RCR). It is reported that the toppling accident of RCR rose especially. The reason that toppling accident occurs is that the reception desk of RCR continues working even though it is unstable state or comes in contact with an obstacle. To prevent RCR from falling into the unstable state or coming in contact with the obstacle and enhance the security of the operation, the haptic interaction is introduced into TCSCR based on the virtual reality technology. The reaction force will be calculated using the preprogrammed rules and conveyed to the operator by the Joystick once a haptic interaction happens, which suggest that a danger exists in the operating of RCR. At last, an experiment is carried out on the tele-operation construction robot test-bed, the experiment results indicate that the tele-operation construction robot system with the haptic interaction can improve operability, security and reduce the toppling accident.
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development of a hydraulic tele operated construction robot using virtual reality new master slave control method and an evaluation of a visual feedback system
International journal of fluid power, 2003Co-Authors: Hironao Yamada, Takayoshi MutoAbstract:AbstractIn this study, we have developed a bilateral telerobotics system for a construction robot using virtual reality. The system consists of a servo-controlled construction robot, two Joysticks for operation of the robot from a remote place, and a three degrees of freedom motion base. The operator of the robot sits on the motion base and controls the robot bilaterally from a remote place. The role of the motion base is to realistically simulate the motion of the construction robot. In this study, firstly, we propose a new method of master-slave control in order to make better feedback feeling of the reaction force to the Joystick for the tele-operated construction robot. Secondly, we tested the visual feedback system for the construction robot using CCD video camera and computer graphics. For tele-operations, a video image of the operation field is normally projected onto a screen to assist the operator. In this study, an additional computer graphics (CG) was generated as a virtual robot to the real vi...
Michael W Andrews - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of video of conspecifics as a reward for socially housed bonnet macaques macaca radiata
Perceptual and Motor Skills, 2004Co-Authors: Elizabeth M Brannon, Michael W Andrews, Leonard A RosenblumAbstract:Two experiments were conducted to examine the effectiveness of presenting brief video of conspecifics to socially housed bonnet macaques as a reward for performing a Joystick task. Using a Joystick, subjects tracked a moving target with the cursor on a computer monitor. In Exp. 1, subjects completed significantly more Joystick trials for food reward than for video reward or no reward. Subjects also preferred viewing video of another group (Other Group Video) to receiving no reward or to viewing video of their own group (Own Group Video). In Exp. 2, subjects were given two reward conditions, video of a familiar social group or video of a new social group. Two monkeys contributed the vast majority of trials, and both responded more frequently when the reward was video of the new social group. Results of these two experiments suggest that viewing video of conspecifics may serve as an effective reward for at least some socially housed primates and suggests that novelty of the individuals depicted in the video is an important factor contributing to the reward value of video.
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automated recording of individual performance and hand preference during Joystick task acquisition in group living bonnet macaques macaca radiata
Journal of Comparative Psychology, 1994Co-Authors: Michael W Andrews, Leonard A RosenblumAbstract:A microchip that provided a unique identification number was injected into each forearm of all 8 members of a bonnet macaque (Macaca radiata) social group. The group was then given computer-controlled Joystick tasks of increasing difficulty. The identification number of the arm used on each trial was input into the computer and used to determine individual performance and hand preference in more than 23,000 trials. Three subjects reversed hand preference as task difficulty was increased over time. All subjects exhibited nearly exclusive use of a single hand on the most difficult task; 6 used the right hand, and 2 used the left. Daily patterns of Joystick activity for the group members differed somewhat from that of our individually housed monkeys.
Bart Fjm Koopman - One of the best experts on this subject based on the ideXlab platform.
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J N E R JOURNAL OF NEUROENGINEERINGAND REHABILITATIONLobo-Prat et al. Journal of NeuroEngineering and Rehabilitation 2014, 11:68http://www.jneuroengrehab.com/content/11/1/68 RESEARCH Open Access Evaluation of EMG, force and Joystick as control interfaces
2016Co-Authors: Joan Lobo-prat, Arvid Ql Keemink, Arno Ha Stienen, Alfred C Schouten, Peter H Veltink, Bart Fjm KoopmanAbstract:Background: The performance capabilities and limitations of control interfaces for the operation of active movement-assistive devices remain unclear. Selecting an optimal interface for an application requires a thorough understanding of the performance of multiple control interfaces. Methods: In this study the performance of EMG-, force- and Joystick-based control interfaces were assessed in healthy volunteers with a screen-based one-dimensional position-tracking task. The participants had to track a target that was moving according to a multisine signal with a bandwidth of 3 Hz. The velocity of the cursor was proportional to the interface signal. The performance of the control interfaces were evaluated in terms of tracking error, gain margin crossover frequency, information transmission rate and effort. Results: None of the evaluated interfaces was superior in all four performance descriptors. The EMG-based interface was superior in tracking error and gain margin crossover frequency compared to the force- and the Joystick-based interfaces. The force-based interface provided higher information transmission rate and lower effort than the EMG-based interface. The Joystick-based interface did not present any significant difference with the force-based interface for any of the four performance descriptors. We found that significant differences in terms of tracking error and information transmission rate were present beyond 0.9 and 1.4 Hz respectively
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Evaluation of EMG, force and Joystick as control interfaces for active arm supports
Journal of NeuroEngineering and Rehabilitation, 2014Co-Authors: Joan Lobo-prat, Arvid Ql Keemink, Arno Ha Stienen, Alfred C Schouten, Peter H Veltink, Bart Fjm KoopmanAbstract:Background The performance capabilities and limitations of control interfaces for the operation of active movement-assistive devices remain unclear. Selecting an optimal interface for an application requires a thorough understanding of the performance of multiple control interfaces. Methods In this study the performance of EMG-, force- and Joystick-based control interfaces were assessed in healthy volunteers with a screen-based one-dimensional position-tracking task. The participants had to track a target that was moving according to a multisine signal with a bandwidth of 3 Hz. The velocity of the cursor was proportional to the interface signal. The performance of the control interfaces were evaluated in terms of tracking error, gain margin crossover frequency, information transmission rate and effort. Results None of the evaluated interfaces was superior in all four performance descriptors. The EMG-based interface was superior in tracking error and gain margin crossover frequency compared to the force- and the Joystick-based interfaces. The force-based interface provided higher information transmission rate and lower effort than the EMG-based interface. The Joystick-based interface did not present any significant difference with the force-based interface for any of the four performance descriptors. We found that significant differences in terms of tracking error and information transmission rate were present beyond 0.9 and 1.4 Hz respectively. Conclusions Despite the fact that the EMG-based interface is far from the natural way of interacting with the environment, while the force-based interface is closer, the EMG-based interface presented very similar and for some descriptors even a better performance than the force-based interface for frequencies below 1.4 Hz. The classical Joystick presented a similar performance to the force-based interface and holds the advantage of being a well established interface for the control of many assistive devices. From these findings we concluded that all the control interfaces considered in this study can be regarded as a candidate interface for the control of an active arm support.
Jiaxiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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The validity and consistency of continuous Joystick response in perceptual decision-making
Behavior Research Methods, 2019Co-Authors: Maciej J. Szul, Aline Bompas, Petroc Sumner, Jiaxiang ZhangAbstract:A computer Joystick is an efficient and cost-effective response device for recording continuous movements in psychological experiments. Movement trajectories and other measures from continuous responses have expanded the insights gained from discrete responses (e.g., button presses) by providing unique information about how cognitive processes unfold over time. However, few studies have evaluated the validity of Joystick responses with reference to conventional key presses, and how response modality can affect cognitive processes. Here we systematically compared human participants’ behavioral performance of perceptual decision-making when they responded with either Joystick movements or key presses in a four-alternative motion discrimination task. We found evidence that the response modality did not affect raw behavioral measures, including decision accuracy and mean response time, at the group level. Furthermore, to compare the underlying decision processes between the two response modalities, we fitted a drift-diffusion model of decision-making to individual participants’ behavioral data. Bayesian analyses of the model parameters showed no evidence that switching from key presses to continuous Joystick movements modulated the decision-making process. These results supported continuous Joystick actions as a valid apparatus for continuous movements, although we highlight the need for caution when conducting experiments with continuous movement responses.
