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  1. Pedro R. Montoro, Dolores Luna & Juan J. Ortells (2014). Subliminal Gestalt Grouping: Evidence of Perceptual Grouping by Proximity and Similarity in Absence of Conscious Perception. Consciousness and Cognition 25 (1):1-8.
    Previous studies making use of indirect processing measures have shown that perceptual grouping can occur outside the focus of attention. However, no previous study has examined the possibility of subliminal processing of perceptual grouping. The present work steps forward in the study of perceptual organization, reporting direct evidence of subliminal processing of Gestalt patterns. In two masked priming experiments, Gestalt patterns grouped by proximity or similarity that induced either a horizontal or vertical global orientation of the stimuli were presented as (...)
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  2. Juan J. Ortells, Christian Frings & Vanesa Plaza-Ayllon (2012). Influence of Spatial Attention on Conscious and Unconscious Word Priming. Consciousness and Cognition 21 (1):117-138.
    We used a qualitative dissociation procedure to assess semantic priming from spatially attended and unattended masked words. Participants categorized target words that were preceded by parafoveal prime words belonging to either the same or the opposite category as the target. Using this paradigm, only non-strategic use of the prime would result in facilitation of the target responses in related trials. Primes were immediately masked or masked with a delay, while spatial attention was allocated to the primes’ location or away from (...)
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  3. Juan J. Ortells, María Teresa Daza & Elaine Fox (2003). Semantic Activation in the Absence of Perceptual Awareness. Perception and Psychophysics 65 (8):1307-1317.
  4. Juan J. Ortells, Maria T. Daza, Carmen Noguera, Encarna Carmona, Elaine Fox & Maria J. F. Abad (2002). Perception Without Awareness: The Qualitative Differences Approach. In Serge P. Shohov (ed.), Advances in Psychology Research, Vol. 14. Nova Science Publishers 119-142.
     
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