Methodology for Detection of ERD/ERS EEG Patterns Produced by Cut Events in Film Fragments

Aznar, Javier Sanz; Aguilar-Paredes, Carlos; Sánchez, Lydia; Bruni, Luis Emilio; Wulff-Abramsson, Andreas

doi:10.1007/978-3-030-50353-6_12

Cited by 4 publications

(9 citation statements)

References 28 publications

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“…Tras este primer paso realizamos señales modelo para cada fragmento audiovisual, a partir de agrupar las señales procedentes de diferentes sujetos de estudio y agrupar los diferentes cortes. Este proceso se explica con más detalle en una publicación previa (Sanz-Aznar et al, 2020).…”

Section: Análisis De Resultadosunclassified

“…Una vez localizadas estas reacciones neuronales se realiza un análisis de pendientes para detectar todas aquellas que suponen una variación significativa en la excitación o inhibición neuronal. Este proceso estadístico que se aplicó de forma automatizada mediante el software MatLab se explica con detalle en la publicación previa antes mencionada (Sanz-Aznar et al, 2020).…”

Section: Análisis De Resultadosunclassified

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Metodología para el estudio neurocinemático del cambio de plano por corte a través del electroencefalograma

Aznar

Sánchez

Bruni

2020

C&M

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El objetivo de este artículo es exponer el planteamiento metodológico para desarrollar un estudio neurocinemático del cambio de plano por corte. Concretamente, el estudio se realiza mediante el análisis del event-related desynchronization/synchronization del electroencefalograma registrado sobre espectadores. Se parte desde una perspectiva general describiendo las implicaciones de aplicar las metodologías neurocinemáticas al análisis fílmico, para finalizar con la peculiaridades que implica nuestra investigación. En nuestro caso trabajamos a partir de fragmentos cinematográficos extraídos de largometrajes ya existentes, realizamos un registro neuronal con 31 electrodos y aplicamos un análisis estadístico basado en el test de permutaciones, el test de correlación de Spearman y el análisis de pendientes sobre la señal registrada transformada al dominio de la frecuencia.

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Section: Análisis De Resultadosunclassified

Metodología para el estudio neurocinemático del cambio de plano por corte a través del electroencefalograma

Aznar

Sánchez

Bruni

2020

C&M

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“…Taking into consideration that the EEG has registered 256 samples per second, we obtain a total of 16 samples for each second in the frequency domain, assuming each frequency sample a time interval of 62.5 milliseconds [ 31 ]. This process to obtain the ASFs is explained in more detail in a previous publication [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

“…If the six possible comparisons showed significant values of dependence (p-value <0.05) and correlation (Rho> 0.5), it would be considered that this time window, for that electrode and in that frequency range, reflected a neuronal response triggered by the shot change by cut. This analytic process is explained in detail in a previous publication dedicated exclusively to expose the signal analysis methodology applied [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

“…As we needed to study the slope in the time windows with the assurance that these slopes were monotonous, we needed to determine the thresholds for the vectors of six and three contiguous samples in the timeline. We would confirm the occurrence of a monotonous slope if inside the six samples comprising a time window we had a three-sample slope with the same signal and a representative inclination [ 32 ]. This baseline process was applied to 20,460 slope values for time windows of six samples and 26,040 slope values for time windows of three samples.…”

Section: Methodsmentioning

confidence: 99%

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Neural responses to shot changes by cut in cinematographic editing: An EEG (ERD/ERS) study

et al. 2021

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In order to analyze and detect neural activations and inhibitions in film spectators to shot changes by cut in films, we developed a methodology based on comparisons of recorded EEG signals and analyzed the event-related desynchronization/synchronization (ERD/ERS). The aim of the research is isolating these neuronal responses from other visual and auditory features that covary with film editing. This system of comparing pairs of signals using permutation tests, the Spearman correlation, and slope analysis is implemented in an automated way through sliding windows, analyzing all the registered electrodes signals at all the frequency bands defined. Through this methodology, we are able to locate, identify, and quantify the variations in neuronal rhythms in specific cortical areas and frequency ranges with temporal precision. Our results detected that after a cut there is a synchronization in theta rhythms during the first 188 ms with left lateralization, and also a desynchronization between 250 ms and 750 ms in the delta frequency band. The cortical area where most of these neuronal responses are detected in both cases is the parietal area.

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Differentiating types of cinematographic shot changes by cut through an EEG power spectral analysis.

Aznar¹,

Sánchez²,

Aguilar-Paredes³

et al. 2024

Psychology of Aesthetics, Creativity, and the Arts

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Films are composed of different sequentially ordered shots limited by cuts, which bound the last frame of the outcoming shot and the first frame of the incoming shot. In turn, film editing is known to impact its aesthetics, and has been widely studied in film theory. The objective of this research was to locate and identify neuronal response patterns that make it possible to differentiate between specific types of shot changes by cut. The analysis was conducted on the neuronal rhythms of the electroencephalogram (EEG) by means of an EEG power spectral analysis. This enabled us to identify changes in neuronal excitation and inhibition based on the type of shot changes by cut. Specifically, we compared the neuronal records to locate the time windows for each electrode and frequency range exhibiting differences for various types of shot changes by cut. We combined this method with the permutation test and Spearman correlation to determine when the time windows for each electrode by frequency band are reacting to the cut event in a correlated manner among the different films. This analysis revealed that the neuronal responses to the cut depend on the variation between shots, rather than solely on the new input. Secondly, the findings allowed us to differentiate between shot changes according to the variation of the shot scale and changes due to the filming angle, or the absence thereof (i.e., cut on axis). The results expand our understanding of viewers' neurological sensitivity to and comprehension of an important film feature.

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Methodology for Detection of ERD/ERS EEG Patterns Produced by Cut Events in Film Fragments

Cited by 4 publications

References 28 publications

Metodología para el estudio neurocinemático del cambio de plano por corte a través del electroencefalograma

Metodología para el estudio neurocinemático del cambio de plano por corte a través del electroencefalograma

Neural responses to shot changes by cut in cinematographic editing: An EEG (ERD/ERS) study

Differentiating types of cinematographic shot changes by cut through an EEG power spectral analysis.

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