Browsing by Author "Quezada, Vanetza E."

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    Identifying Fear-evoking Pictures from the International Affective Picture System (IAPS) in a Chilean Sample
    (2016) Moreno, Carolina P.; Quezada, Vanetza E.; Antivilo, Andres
    The goal of this study was to identify a valid set of fear-evoking pictures from IAPS images (Lang, Bradley, & Cuthbert, 2008) in a Chilean Sample. To do so, categorical and dimensional ratings of pictures made by our participants were analyzed, considering potential sex differences. We also evaluated potential transcultural differences by comparing our results with the results of Barke, Stahl, & Kroner-Herwig (2012), whose methodology was followed in the present study, but incorporating new statistical criteria for the valid identification of pictures that evoke fear. Sixty Chilean volunteers (30 women) with a mean age of 22.3 years rated 146 pictures of the IAPS regarding to the choice of discrete emotions and the ratings of valence, arousal and dominance. Six pictures were identified that evoked fear significantly more than any other emotion. Compared to the German sample, the Chilean group evaluated images with more arousal and valence.
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    Sergio Yulis : Pasado y presente del enfoque conductual en Chile
    (2014) Quezada, Vanetza E.; Vergés, Álvaro; Laborda, Mario A.
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    Sergio Yulis: Pasado y presente del enfoque conductual en Chile.
    (2014) Vergés, Álvaro; Quezada, Vanetza E.; Laborda, Mario A.
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    THE EFFECT OF MASSIVE EXTINCTION TRIALS ON THE RECOVERY OF HUMAN FEAR CONDITIONING
    (SOC MEXICANA PSICOLOGIA, 2017) Diaz, Marcela C.; Quezada, Vanetza E.; Navarro, Victor M.; Laborda, Mario A.; Betancourt, Ronald
    Given the mixed results in literature and the lack of human studies, a fear conditioning paradigm was used to evaluate whether the use of massive or moderate extinction trials have a differential effect on the recovery of extinguished fear, when assessed outside of the extinction context (an ABC renewal design), and after a delay (spontaneous recovery). 32 college students were randomly assigned to massive (80 conditioned stimulus presentations) and moderate extinction (10 conditioned stimulus presentations) groups. Results showed that massive extinction produced a significantly lower spontaneous recovery than moderate extinction, but that effect decreased when tested outside of the extinction context (renewal). These results question the applicability of this technique in the therapeutic context.