Developmental Psychobiology, 57(7 2015)). One is a set of ‘non-social’ videos depicting moving toys without human interference, earlier used in a study by Emily Jones and colleagues (Developmental changes in infant brain activity during naturalistic social experiences. Quit task : 122 (but cancelling the quit-command will give you 123).Attention grabbers: sound (120) or video clip (121).Begin and end of a pause (124, 125 respectively).General markers: - begin and end of a task (250, 251 respectively) Roy van Koten was the person who programmed all tasks. Tasks were programmed in Matlab using Psych-Toolbox 3 (Brainard & Vision, 1997) from a second laptop (MacBookPro 11,1 13 inch retina OSX 10.9.5 Intel Core i7 2,8 GHz 16GB 1600 MHz DDR3).
#Coherence pro windows 10
Continuous EEG was acquired at a 2048Hz sample rate using Actiview (version 7.05) from a Dell latitude E5540 laptop (operating system Windows 10 Professional in lab 0.41 version details: i5-4310U CPU 2,00 GHz 2,60GHz 8GB in lab 0.42, version details: i3-4010U CPU 1,70 GHz 1,70GHz 4GB). The EEG data were recorded relative to common mode sense and driven right leg (CMS/DRL) electrodes placed near Cz. For some children, an additional eye-electrode was placed behind the child’s left eye (Ex3), and/or additional loose electrodes were positioned at the mastoids (Ex1-2). (Note that we have home-build software to accomplish this ‘videocoder’).Ĭontinuous EEG was recorded using a 32-channel ActiveTwo BioSemi system (Amsterdam, Netherlands), configured to the standard International 10-20 System (channels: 28 lateral channels FP1/2 F7/8 F3/4 AF3/4 FC1/2, FC5/6, C3/4, T7/8, CP1/2, CP5/6, P3/4, P7/8, O1/2, PO3/4, plus 4 midline channels Fz, Cz, Pz, Oz). By using ffmpeg tools through the Matlab and recording laptop interface, we could timestamp frames from the video to correspond with the onset of each trial: the video also ‘received' a binary code block in the top left of the video, which allows for (automatic) trial trigger code lookup to scroll to only task-relevant video-frames.
) sampling at 15Hz placed below the screen recorded the child’s behaviour.
Parents were instructed not to interact with their child during the experiment. Each testing room is semi-dark and controlled for luminance (between 8-20 lux, usually around 12 ± 2) and temperature (between 18-25°). There are two possible infant labs: room 0.41 and room 0.42.
#Coherence pro full
During the study infants sat on their parent’s lap or on a highchair facing at approximately 65 cm distance a 23-inch Full HD IPS LG black computer monitor (refresh rate 60 Hz, 1920 x 1080 resolution, full details: LG 23MB35PM-B dimensions in cm 51.3 (w) * 28.7 (h) screen calibrated at 120 candela/m2).
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