High-quality audio and video recordings were obtained for the analysis of phonetic accuracy. Simultaneously, three-dimensional kinematic data were collected at 250 samples/second using a three-camera Optotrak 3020 motion capture system or 3D Investigator motion capture system (both Northern Digital Inc., Waterloo, Ontario, Canada). Small (6 mm) infrared light emitting diodes (IREDs) were attached with anti-allergenic medical adhesive to each participant’s upper lip, lower lip, and a lightweight splint under the chin at midline to approximate jaw movement. Five additional IREDs were used to create a three-dimensional head coordinate system in order to subtract head motion artifact (Smith, Johnson, McGillem, & Goffman, 2000 ). A time-locked acoustic signal was collected at 16,000 samples/second to confirm that movement records aligned with target nonword productions.
3d investigator motion capture system
Manufactured by Northern Digital
Sourced in Canada
The 3D Investigator is a motion capture system designed for high-precision tracking of human movement. It utilizes multiple cameras to capture detailed 3D data in real-time, providing accurate measurements of joint positions and trajectories.
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Lab products found in correlation
3 protocols using 3d investigator motion capture system
1
Three-Dimensional Kinematic Analysis of Lip and Jaw Movements
2
Synchronized Autonomic and Acoustic Signals
3
Social Attitude Priming and Self-Monitoring
Check if the same lab product or an alternative is used in the 5 most similar protocols
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The stimulus display was back-projected (Hitachi CP-X345) on a flat white screen (2.74 x 3.66 m) at a viewing distance of 1.9 m. Pre-recorded video-clips were edited using Adobe Premier CS5 software, and later presented using the COGENT toolbox implemented in MATLAB (Mathworks, Inc). Movements were recorded at 200Hz from an infrared sensor positioned on the tip of the right index finger using a 3D Investigator Motion Capture system (Northern Digital Inc., Ontario, Canada). The first and last 5 s of data recordings were discarded to minimize asynchrony around movement onset, and the potential influence of attentional and fatigue effects (see Hardwick & Edwards, 2012; (link)Roberts, Hayes et al., 2015) (link).
A scrambled-sentence task was used to prime a social attitude and consisted of an A4 four-page booklet with six partially formed sentences on each page. Self-monitoring was measured using the 18-item self-monitoring scale (Snyder & Gangestad, 1986) (link). Participants responded to each item with true ('T') or false ('F'). Before calculating the sum of the scores for each participant, ten items were reverse-scored, with high scores indicating high selfmonitoring, and low scores indicating low-self-monitoring. The groups were differentiated by a median split of the self-monitoring scores (e.g., Cheng & Chartrand, 2003) (link).
A scrambled-sentence task was used to prime a social attitude and consisted of an A4 four-page booklet with six partially formed sentences on each page. Self-monitoring was measured using the 18-item self-monitoring scale (Snyder & Gangestad, 1986) (link). Participants responded to each item with true ('T') or false ('F'). Before calculating the sum of the scores for each participant, ten items were reverse-scored, with high scores indicating high selfmonitoring, and low scores indicating low-self-monitoring. The groups were differentiated by a median split of the self-monitoring scores (e.g., Cheng & Chartrand, 2003) (link).
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