Vrednotenje kognitivnega napora prostoročnih uporabniških vmesnikov na osnovi subjektivne ocene in analize EEG meritev s pomočjo naprave emotiv EPOC+

Janko, Aleš

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Title:	Vrednotenje kognitivnega napora prostoročnih uporabniških vmesnikov na osnovi subjektivne ocene in analize EEG meritev s pomočjo naprave emotiv EPOC+
Authors:	ID Janko, Aleš (Author) ID Šumak, Boštjan (Mentor) More about this mentor... ID Jaušovec, Norbert (Comentor)
Files:	MAG_Janko_Ales_2017.pdf (4,02 MB) MD5: 5638E3291DE0DAC5618C7FF44C2844EC
Language:	Slovenian
Work type:	Master's thesis/paper
Typology:	2.09 - Master's Thesis
Organization:	FERI - Faculty of Electrical Engineering and Computer Science
Abstract:	Potreba po bolj intuitivni interakciji je privedla do nastanka naravnega uporabniškega vmesnika. Ta prinaša številne nove načine prostoročne interakcije, ki pa še niso tako razširjeni, kot je na primer stični način interakcije z miško in s tipkovnico. Ker gre tu predvsem za novo tehnologijo, se morajo neizkušeni uporabniki naučiti upravljanja tovrstnih naprav, da jih lahko uporabljajo hitro, preprosto in podzavestno. Trud, ki ga vloži uporabnik v to, je odvisen od predhodnega znanja, kar je povezano tudi s kognitivno obremenitvijo. V magistrskem delu smo izvedli raziskavo, na podlagi katere smo ugotavljali, ali je stopnja kognitivne obremenitve pri uporabnikih prostoročne interakcije večja od stopnje obremenitve pri stični interakciji. Kognitivno obremenitev smo vrednotili na osnovi subjektivne ocene udeleženca eksperimenta in meritev možganskih aktivnosti (EEG). Meritve možganskih aktivnosti smo izvedli s komercialno dostopno napravo Emotiv EPOC+. V raziskavi smo primerjali prostoročni interakciji na osnovi prepoznavanja gest za napravi Kinect in Myo ter stično interakcijo z miško in s tipkovnico. V raziskavi je sodelovalo 26 udeležencev brez daljših ali naprednejših izkušenj s prostoročno interakcijo, so pa redni uporabniki računalnika. Rezultati analize možganskega valovanja so pokazali, da je bila obremenitev udeležencev pri napravah prostoročne interakcije nekoliko večja kot pri stični interakciji, vendar pa razlike niso bile signifikantne. Z analizo subjektivnih ocen so bile ugotovljene signifikantne razlike med obremenitvijo pri napravah prostoročne in stične interakcije. Ugotovljeno je bilo tudi, da obstajajo povezave med kognitivno obremenitvijo in uporabnostjo, preprostostjo uporabe in čustvenim doživljanjem.
Keywords:	prostoročni uporabniški vmesnik, prostoročna interakcija, kognitivna obremenitev, EEG, Emotiv Epoc+, Kinect, Myo
Place of publishing:	[Maribor
Publisher:	A. Janko
Year of publishing:	2017
PID:	20.500.12556/DKUM-65938
UDC:	004.514(043.2)
COBISS.SI-ID:	20640022
NUK URN:	URN:SI:UM:DK:BB91QG8Y
Publication date in DKUM:	16.06.2017
Views:	1633
Downloads:	132
Metadata:
Categories:	KTFMB - FERI
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Secondary language

Language:	English
Title:	Measuring the cognitive effort of touch-free user interfaces based on subjective assessment and EEG signals analysis using emotiv EPOC+
Abstract:	The need for a more intuitive interaction was leading to the formation of a natural user interface. Natural user interface brings many new ways of hands-free interaction, which are not so widespread yet as contact interaction with mouse and keyboard. Because the focus is mainly on new technologies, inexperienced users will have to learn to use these devices, so they can use them quickly, easily and unconsciously. The user's effort depends on his prior knowledge, which is also associated with cognitive load. In this master's thesis, we conducted a survey on the basis of which we tried to determine whether the degree of cognitive load for user hands-free interaction is greater than the level of effort in the contact interaction. Cognitive load was evaluated based on subjective assessments of students in experiments and measurements of brain activity (EEG). Measurements of brain activity were performed using commercially available device Emotiv EPOC +. In the study, we compared the hands-free interaction based on the recognition of gestures by the device Kinect and Myo and contact interaction with the mouse and keyboard. The study involved 26 participants who did not have longer or more advanced experience with hands-free interaction, rather they were regular users with contact interaction experiences. The results of the analysis of brain waves showed that the effort for participants in hands-free devices interactions were a little bit higher than the results in the contact interaction, but these differences were not significant features. In the analysis of subjective evaluation, it was found that there are significant differences between the effort on the device hands-free interaction and contact interaction. Connections between cognitive load and usability, ease of use and emotional experience were also found.
Keywords:	Touch-free user interface, touch-free interaction, cognitive load, EEG, Emotiv EPOC+, Kinect, Myo

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