Measuring differential nodal distance using the function acquisition speed test

Increasing evidence suggests that the relatedness of stimuli within the Function Acquisition Speed Test (FAST) methodology is sensitive to the learning histories of participants. For example, this method is sensitive to differences in the amount of baseline training provided to establish stimulus equivalence relations using arbitrary stimuli (Cummins et al., 2018a). However, it has not yet been investigated whether the relatedness of stimuli within the FAST varies based on differential nodal distances between stimuli within stimulus classes. If so, the FAST could serve an important adjunct assessment procedure for researchers who wish not only to assess the formation of stimulus classes using traditional methods, such as matching-to-sample, but also the relative relatedness of stimuli within complex stimulus classes (i.e., nodal distance). The current study sought to investigate this possibility. Participants (n = 16) were trained in the formation of two 4-member equivalence classes consisting of arbitrary nonsense syllables. Following this, participants completed three FAST assessments, each of which probed for the relatedness of stimulus pairs of differing nodal distance. Group- and individual-level analyses broadly demonstrated that relatedness varied as a function of nodal distances in pre-trained stimulus classes. However, results also highlighted some limitations of the FAST at the individual level.

The Function Acquisition Speed Test (FAST) as a Measure of Verbal Stimulus Relations in the Context of Condom Use

10.1007/s40732-018-0321-0 ◽

2018 ◽

Vol 69 (1) ◽

pp. 107-115 ◽

Cited By ~ 1

Author(s):

Jamie Cummins ◽

Ian Tyndall ◽

Amy Curtis ◽

Bryan Roche

Keyword(s):

Condom Use ◽

Verbal Stimulus ◽

Stimulus Relations ◽

Speed Test ◽

Acquisition Speed ◽

A Function Acquisition Speed Test for Equivalence Relations (FASTER)

10.11133/j.tpr.2013.63.4.001 ◽

2013 ◽

Vol 63 (4) ◽

pp. 707-724 ◽

Cited By ~ 6

Author(s):

Anthony O'Reilly ◽

Bryan Roche ◽

Amanda Gavin ◽

Maria Ruiz ◽

Aoife Ryan ◽

...

Keyword(s):

Equivalence Relations ◽

Speed Test ◽

Acquisition Speed ◽

Using a Modified Function Acquisition Speed Test (FAST) for Assessing Implicit Gender Stereotypes

10.1007/s40732-016-0164-5 ◽

2016 ◽

Vol 66 (2) ◽

pp. 223-233 ◽

Cited By ~ 7

Author(s):

Aoife Cartwright ◽

Bryan Roche ◽

Michelle Gogarty ◽

Anthony O’Reilly ◽

Ian Stewart

Keyword(s):

Gender Stereotypes ◽

Speed Test ◽

Acquisition Speed ◽

The Function Acquisition Speed Test (FAST): A Behavior Analytic Implicit Test for Assessing Stimulus Relations

10.1007/bf03395817 ◽

2012 ◽

Vol 62 (3) ◽

pp. 507-528 ◽

Cited By ~ 11

Author(s):

Anthony O’Reilly ◽

Bryan Roche ◽

Maria Ruiz ◽

Ian Tyndall ◽

Amanda Gavin

Keyword(s):

Implicit Test ◽

Stimulus Relations ◽

Speed Test ◽

Acquisition Speed ◽

Accuracy Improvement of Stator Inductance Identification Method Based on Low-Frequency Current Injection for Three-Level NPC Inverter-Fed IM Drives in Locked-Rotor Standstill Condition

Electronics ◽

10.3390/electronics10040488 ◽

2021 ◽

Vol 10 (4) ◽

pp. 488

Author(s):

Yerganat Khojakhan ◽

Kyoung-Min Choo ◽

Junsin Yi ◽

Chung-Yuen Won

Keyword(s):

Induction Motor ◽

Low Frequency ◽

Current Injection ◽

Heavy Load ◽

Injection Test ◽

Low Speed ◽

Injection Speed ◽

Speed Test ◽

Identification Method ◽

Drive Systems

In this paper, a stator inductance identification process is proposed. The process is based on a three-level neutral-point-clamped (NPC) inverter-fed induction motor (IM) drive with a standstill condition. Previously, a low-speed alternating current (AC) injection test for stator inductance identification was proposed to overcome practical problems in conventional identification methods for three-level NPC inverter-based IM drives. However, the low-speed AC injection test-based identification method has some problems if a heavy load or mechanical brake is connected, as these can forcibly bring the rotor to a standstill during parameter identification. Since this low-speed testing-based identification assumes the motor torque is considerably lower in low-speed operations, some inaccuracy is inevitable in this kind of standstill condition. In this paper, the proposed current injection speed generator is based on the previously studied low-speed test-based stator inductance identification method, but the proposed approach gives more accurate estimates under the aforementioned standstill conditions. The proposed method regulates the speed for sinusoidal low-frequency AC injection on the basis of the instantaneous reactive and air-gap active power ratio. This proposed stator inductance identification method is more accurate than conventional fixed low-frequency AC signal injection identification method for three-level NPC inverter-fed IM drive systems with a locked-rotor standstill condition. The proposed method’s accuracy and reliability were verified by simulation and experiment using an 18.5 kW induction motor.

A V-SLAM Guided and Portable System for Photogrammetric Applications

Remote Sensing ◽

10.3390/rs13122351 ◽

2021 ◽

Vol 13 (12) ◽

pp. 2351

Author(s):

Alessandro Torresani ◽

Fabio Menna ◽

Roberto Battisti ◽

Fabio Remondino

Keyword(s):

Low Cost ◽

Cost Effective ◽

Motion Blur ◽

Guidance System ◽

Prototype System ◽

Active Sensors ◽

Localization And Mapping ◽

Acquisition Speed ◽

Mobile Mapping System ◽

Slam Algorithm

Mobile and handheld mapping systems are becoming widely used nowadays as fast and cost-effective data acquisition systems for 3D reconstruction purposes. While most of the research and commercial systems are based on active sensors, solutions employing only cameras and photogrammetry are attracting more and more interest due to their significantly minor costs, size and power consumption. In this work we propose an ARM-based, low-cost and lightweight stereo vision mobile mapping system based on a Visual Simultaneous Localization And Mapping (V-SLAM) algorithm. The prototype system, named GuPho (Guided Photogrammetric System) also integrates an in-house guidance system which enables optimized image acquisitions, robust management of the cameras and feedback on positioning and acquisition speed. The presented results show the effectiveness of the developed prototype in mapping large scenarios, enabling motion blur prevention, robust camera exposure control and achieving accurate 3D results.

Cognitive, physical and disability trajectories in community-dwelling elderly people

Aging Clinical and Experimental Research ◽

10.1007/s40520-021-01804-3 ◽

2021 ◽

Cited By ~ 1

Author(s):

Ottavia Eleonora Ferraro ◽

Antonio Guaita ◽

Simona Villani

Keyword(s):

Physical Function ◽

Cumulative Incidence ◽

Female Gender ◽

Community Dwelling ◽

Study Cohort ◽

Carrier Status ◽

Speed Test ◽

Health Trajectories ◽

Severe Group ◽

Incidence Of Dementia

Abstract Backgrounds and aims Health trajectories in aging, rather than single time-point assessments, could be early indicators of the onset of conditions such as dementia. The aim of this study was to identify different aging trajectories and to investigate their influence on the cumulative incidence of dementia. Methods We evaluated data referring to 993 elders from the InveCe.Ab study cohort. All subjects were free from dementia at baseline and re-assessed on at least one other occasion thereafter. Cognitive function was assessed using the Mini-Mental State Examination (MMSE), physical function using the Walking Speed Test (WST), and disability on the basis of the Activities of Daily Living (ADL) score. To describe the different courses of the three outcomes combined, the Group-Based Trajectory Model (GBTM) method was applied. We looked for differences in age, gender, education, ApoE-e4 carrier status and obesity, and then investigated the influence of the observed trajectories on the incidence of dementia. Results Three trajectories were identified: a “good” scenario was observed in 703 (70.2%) individuals, who showed substantially stable cognitive and physical function and no disability; an “intermediate” scenario in 248 subjects (25.5%), who recorded a longer walking time, lower MMSE score, and a one-point higher ADL score; and a “severe” scenario in 42 elders (4.3%), who recorded declines in all the outcomes. Female gender, obesity and low education were most represented in the “severe” group. ApoE-e4 carrier status showed no difference between groups. The estimated cumulative incidence of dementia was higher in the “severe” (37%) than in the “intermediate” (7%) and “good” (< 1%) scenarios. Conclusions Using simple measurements, we built different aging trajectories, and observed that the worst performers had the highest incidence of dementia. Better knowledge of trajectories of aging would be useful for preventive interventions aimed at promoting healthier aging.