Kavaklıoğlu, Efsun
Multisensory processing and crossmodal interactions in the temporal domain are crucial for survival in a dynamic environment. Temporal ventriloquism illusion demonstrates the importance of the crossmodal interactions in the temporal domain and the influences of the auditory signals (e.g., auditory time intervals) on visual perception. Attention is another mechanism playing a critical role in sensory processing, and it allows us to prioritize relevant information in the visual field. Previous studies have shown that attention can modulate multisensory processing and crossmodal interactions. The current thesis was focused on understanding whether spatial attention modulates audiovisual interactions in the temporal domain. An apparent motion paradigm of temporal ventriloquism illusion was used. The experimental design was based on auditory time interval effects on perceived visual speed. Besides speed judgment, participants performed a secondary task on discriminating static clicks. Using endogenous cues, we manipulated attention in the auditory domain and systematically changed the difficulty level of the secondary task. The results revealed a significant effect of task difficulty on audiovisual interactions in the temporal domain, such that the effects of auditory time intervals on perceived speed became larger with an increasing level of task difficulty. Moreover, the cueing effect became significant when the difficulty level of the secondary task was low, suggesting that the participants might have more resources available to process informative cues. Future studies aimed to determine the effects of task difficulty on attention and audiovisual processes may provide further insights on the involvement of attention in multisensory processing.


Computational Design Emergence by Complexity and Morphogenesis
Gürsel Dino, İpek (null; 2016-12-17)
Emergence is the form or behavior of natural or artificial systems, which materializes due to the system components’ interactions with each other and their environment. Emergent properties are a result of processes of self-organization of complex systems such as swarming behavior of birds, insect colonies, immune systems, cities, the World Wide Web, social interactions, etc., as well as processes of natural morphogenesis that exhibit behavior of growth and adaptation. Emergent systems are also closely relat...
Distance-based Indexing of Residue Contacts for Protein Structure Retrieval and Alignment
Sacan, Ahmet; Toroslu, İsmail Hakkı; Ferhatosmanoglu, Hakan (2008-10-10)
New protein structures are continuously being determined with the hope of deriving insights into the function and mechanisms of proteins, and consequently, protein structure repositories are growing by leaps and bounds. However, we are still far from having the right methods for sensitive and effective use of the available structural data. The fact that current structural analysis tools are impractical for large-scale applications have given rise to several approaches that try to quickly identify candidate ...
Predictive models in ecology: Comparison of performances and assessment of applicability
Tan, Can Ozan; Ozesmi, Uygar; Beklioğlu, Meryem; Per, Esra; Kurt, Bahtiyar (Elsevier BV, 2006-04-01)
Ecological systems are governed by complex interactions which are mainly nonlinear. In order to capture the inherent complexity and nonlinearity of ecological, and in general biological systems, empirical models recently gained popularity. However, although these models, particularly connectionist approaches such as multilayered backpropagation networks, are commonly applied as predictive models in ecology to a wide variety of ecosystems and questions, there are no studies to date aiming to assess the perfo...
Classical analysis of time behavior of radiation fields associated with biophoton signals
Choi, Jeong Ryeol; Kim, Daeyeoul; Menouar, Salah; Sever, Ramazan; Abdalla, M. Sebawe (2016-01-01)
BACKGROUND: Propagation of photon signals in biological systems, such as neurons, accompanies the production of biophotons. The role of biophotons in a cell deserves special attention because it can be applied to diverse optical systems.
Examination of Computer Supported Collaborative Business Process Modeling with Activity Theory
FINDIK COŞKUNÇAY, DUYGU; Çakır, Murat Perit (2014-09-10)
Activity Theory provides a framework to examine and explain human-human and human-computer interactions. In this study, Activity Theory was used to examine both interactions in depth in the context of Computer Supported Collaborative Business Process Modeling (CSCBPM) in which geographically dispersed multiple users interact with each other and with the system. This framework enabled us to examine the activities of CSCBPM in detail and understand the process of CSCBPM. During the CSCBPM, some difficulties w...
Citation Formats
E. Kavaklıoğlu, “SPEED PERCEPTION IN MULTISENSORY PROFILES: WHAT IS THE EFFECT OF ATTENTION?,” M.S. - Master of Science, Middle East Technical University, 2022.