Summary

संयोजन कंप्यूटर खेल आधारित उच्च घनत्व ईईजी और इन्फ्रारेड टकटकी ट्रैकिंग के साथ व्यवहार प्रयोगों

Published: December 16, 2010
doi:

Summary

कंप्यूटर खेल आधारित संज्ञानात्मक कार्य के दौरान उच्च घनत्व ईईजी और टकटकी डेटा रिकॉर्डिंग के लिए प्रक्रिया का वर्णन कर रहे हैं. एक वीडियो गेम का उपयोग करने के लिए संज्ञानात्मक कार्यों वर्तमान प्रयोगात्मक नियंत्रण त्याग के बिना पारिस्थितिक वैधता को बढ़ाता है.

Abstract

Experimental paradigms are valuable insofar as the timing and other parameters of their stimuli are well specified and controlled, and insofar as they yield data relevant to the cognitive processing that occurs under ecologically valid conditions. These two goals often are at odds, since well controlled stimuli often are too repetitive to sustain subjects’ motivation. Studies employing electroencephalography (EEG) are often especially sensitive to this dilemma between ecological validity and experimental control: attaining sufficient signal-to-noise in physiological averages demands large numbers of repeated trials within lengthy recording sessions, limiting the subject pool to individuals with the ability and patience to perform a set task over and over again. This constraint severely limits researchers’ ability to investigate younger populations as well as clinical populations associated with heightened anxiety or attentional abnormalities. Even adult, non-clinical subjects may not be able to achieve their typical levels of performance or cognitive engagement: an unmotivated subject for whom an experimental task is little more than a chore is not the same, behaviourally, cognitively, or neurally, as a subject who is intrinsically motivated and engaged with the task. A growing body of literature demonstrates that embedding experiments within video games may provide a way between the horns of this dilemma between experimental control and ecological validity. The narrative of a game provides a more realistic context in which tasks occur, enhancing their ecological validity (Chaytor & Schmitter-Edgecombe, 2003). Moreover, this context provides motivation to complete tasks. In our game, subjects perform various missions to collect resources, fend off pirates, intercept communications or facilitate diplomatic relations. In so doing, they also perform an array of cognitive tasks, including a Posner attention-shifting paradigm (Posner, 1980), a go/no-go test of motor inhibition, a psychophysical motion coherence threshold task, the Embedded Figures Test (Witkin, 1950, 1954) and a theory-of-mind (Wimmer & Perner, 1983) task. The game software automatically registers game stimuli and subjects’ actions and responses in a log file, and sends event codes to synchronise with physiological data recorders. Thus the game can be combined with physiological measures such as EEG or fMRI, and with moment-to-moment tracking of gaze. Gaze tracking can verify subjects’ compliance with behavioural tasks (e.g. fixation) and overt attention to experimental stimuli, and also physiological arousal as reflected in pupil dilation (Bradley et al., 2008). At great enough sampling frequencies, gaze tracking may also help assess covert attention as reflected in microsaccades – eye movements that are too small to foveate a new object, but are as rapid in onset and have the same relationship between angular distance and peak velocity as do saccades that traverse greater distances. The distribution of directions of microsaccades correlates with the (otherwise) covert direction of attention (Hafed & Clark, 2002).

Protocol

1. एक मनोरंजक और वैज्ञानिक जानकारीपूर्ण वीडियो गेम डिज़ाइन लागू करें एक खेल डिजाइन की प्रक्रिया में जो वैज्ञानिक मान और playability की चिंताओं को एक अन्य को सूचित पुनरावृत्त. एक experimenter के रूप में, आप उ?…

Discussion

शायद एकल सबसे महत्वपूर्ण बाधा एकीकृत अध्ययन समय की राशि है कि एक एकल प्रायोगिक विषय (विशेष रूप से एक नैदानिक ​​आबादी से एक) काफी थका हुआ बनने से पहले प्रदर्शन की उम्मीद की जा सकती है पर व्यावहारिक सीमा ह…

Declarações

The authors have nothing to disclose.

Acknowledgements

इस परियोजना द्वारा वित्त पोषित है Autism अनुसंधान अनुदान पायलट बोलती 2597 # और अमेरिका के राष्ट्रीय विज्ञान फाउंडेशन संकाय जल्दी कैरियर विकास पुरस्कार द्वारा # BCS – +०८,४६,८९२.

Materials

Material Name Tipo Company Catalogue Number Comment
128-channel BioSemi ActiveTwo measurement system   BioSemi   http://www.biosemi.com
32 channel A-set + CMS/DRL   BioSemi P32-ABC-ACMS  
32 channel B-set   BioSemi P32-ABC-B  
32 channel C-set   BioSemi P32-ABC-C  
32 channel D-set   BioSemi P32-ABC-D  
EX1-EX8 electrodes   BioSemi 8 x TP PIN  
128-channel cap   BioSemi CAP M 128  
EyeLink 1000 infrared gaze tracker   SR Research    
EyeLink 1000 Remote Camera Upgrade   SR Research n/a Allows for target sticker tracking
SignaGel electrode gel   Parker Labs n/a  
0.05% KCl electrolytic (NaCl) gel   n/a n/a Purchased from compounding pharmacy
Intensity Pro   Blackmagic Design    

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Yoder, K. J., Belmonte, M. K. Combining Computer Game-Based Behavioural Experiments With High-Density EEG and Infrared Gaze Tracking. J. Vis. Exp. (46), e2320, doi:10.3791/2320 (2010).

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