Electrophysiological correlates of the startle response during exposure to emotional film clips (EMDBV2)

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Date de début: 09/04/2018
Date d'achèvement: 13/04/2020


clips are an important tool for evoking emotional responses in the laboratory.
When compared with other emotionally visual stimuli such as pictures, film
clips seem to be more effective in eliciting emotions for longer periods of
time at both the subjective and physiological levels (Ray 2007).
The impact of emotional laden pictures in the Laboratory seem to be attenuated
as exposure time increases (Koukounas and Over 2000).
That is why sustained tasks use blocks of several pictures, where each picture
only lasts for 6 seconds (Smith, Bradley et al. 2005).
The use of emotionally arousing film clips instead of pictures might overcome
this limitation. First, film clips seem to be more effective in sustained
affective processing for longer periods of time at both the subjective and
physiological levels. Second, film clips produce effects similar to exposing
individuals to real-life situations without the ethical problems that this
procedure might create (Schaefer, Nils et al. 2010). 

Our group created the emotional
movie database - EMDB (Carvalho, Leite et al. 2012)
based on self-report and psychophysiological responses. Therefore,
the first experiment had three distinct phases: (1) the pre-selection and
editing of 52 film clips (2) the normative rating of these film clips by a
sample of 113 participants and (3) psychophysiological assessment (Skin
conductance Level (SCL) and the Heart rate (HR)) on 32 volunteers. 

The main objective of this study is to expand the EMDB, by validating
new emotional categories. Therefore, we aim to validate the following emotional
categories: positive high arousing (e.g., extreme sports); negative high
arousing (e.g., social pain, starvation, bullying); positive low arousing
(e.g., social inclusion), negative low arousing (e.g., social
discrimination/social pain; child labour, pollution), and neutral (e.g.,
ordinary tasks) (see figure 1). These video stimuli will be collected and
analysed based on a dimensional approach to emotional stimuli (valence, arousal
and dominance). We believe that these categories are relevant to various empirical
questions and may give an important support to multi-domain researches. 


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Dernière mise à jour le 2018-09-04 à 15:23