Elp sc21b

Manufactured by Epson

Sourced in Canada

The ELP-SC21B is a spectrophotometer designed for laboratory use. It is capable of measuring the absorbance or transmittance of samples across a range of wavelengths. The device features a compact and durable design, making it suitable for various laboratory applications.

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Lab products found in correlation

Matlab 2015a, by MathWorks (2 mentions) Propixx color projector, by VPixx Technologies (2 mentions) Matlab r2020b, by MathWorks (1 mentions) Propixx projector, by VPixx Technologies (1 mentions) Psychotoolbox, by MathWorks (1 mentions) Eyelink 1000 system, by SR Research (1 mentions) Hd 380 pro, by Sennheiser (1 mentions)

3 protocols using elp sc21b

Eye Tracking in Dimly Lit Visual Experiments

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Experimental measures were performed in a quiet and dimly lit room. Stimuli were generated with Psychotoolbox in MATLAB r2020b (The MathWorks) and presented with PROPixx projector (VPixx Technologies Inc., Canada) by back projection onto a matte white PVC screen (Epson ELP-SC21B, 180 × 100 cm) with a resolution of 1920 × 1080 pixels and a refresh rate of 120 Hz. Participants sat 1 m from the screen, which subtended 90 × 50 cm. Head position was stabilized by a chin and headrest.
The position of one eye was monitored at 1000 Hz with the EyeLink 1000 system (SR Research, Kanata, Canada). A nine-point calibration and validation sequence was made at the beginning of each session, and eye drift corrected at the beginning of each block.

Xie X.Y., Morrone M.C, & Burr D.C. (2023). Serial dependence in orientation judgments at the time of saccades. Journal of Vision, 23(7), 7.

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Detailed Multimodal Experimental Setup

Cited 1 time

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The apparatus is the same as used in our published study of behavioral oscillations (Zhang et al., 2019 (link)). For readability, it is described here again as follows. The experiment was run in a dimly lit room (ambient luminance, 2.1 cd/m²⁾. A PROPixx color projector (VPixx Technologies Inc., Bruno-de-Montarville, Quebec, Canada) was used to present visual stimuli on a matte white PVC screen (Epson ELP-SC21B, 1771 × 996 mm) with a resolution of 1920 × 1080, a frame rate of 120 Hz, and it cast an area of 117 × 66 cm (45.4° × 26.5° of visual angle). The projector was set to quadrant mode, thereby resulting in a resolution of 960 × 540 pixels and a frame rate of 480 Hz when displaying images. The luminance output of the projector was linearized. Participants’ heads were maintained as stationary by using a chin-and-forehead rest at a viewing distance of 1.4 m. The sound stimuli were delivered bilaterally through headphones (Sennheiser HD 380 pro; Sennheiser, Wedemark, Germany). All the experimental programs were developed with Matlab 2015a (MathWorks Inc., Natick, MA, USA) and Psychophysics Toolbox.

Zhang H, & Alais D. (2020). Individual difference in serial dependence results from opposite influences of perceptual choices and motor responses. Journal of Vision, 20(8), 2.

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Visual Perception Experiment in Controlled Lighting

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The experiment was run in a dimly lit room. The ambient luminance was 2.1 cd/m². Participants were seated in front of a matte white PVC screen (Epson ELP-SC21B, 1771 × 996 mm) with a viewing distance of 1.4 m. We used a PROPixx color projector (VPixx Technologies Inc.) to present visual stimuli on a casted area of 117 × 66 cm (45.4 × 26.5° of visual angle) at a resolution of 1920 × 1080 pixels at a refresh rate of 120 Hz. The projector was set to quadrant mode, resulting in a resolution of 960 × 540 pixels at a frame rate of 480 Hz when displaying images. The luminance output of the projector was linearized. Participants’ heads were maintained as stationary by using a chin-rest. We used headphones to deliver sound stimuli. Experimental programs for this study were developed with Matlab 2015a (MathWorks Inc., Natick, MA) and Psychophysics Toolbox^{52 (link),53 (link)}.

Zhang H., Morrone M.C, & Alais D. (2019). Behavioural oscillations in visual orientation discrimination reveal distinct modulation rates for both sensitivity and response bias. Scientific Reports, 9, 1115.

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