National Repository of Grey Literature 83 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Memory Functions in Children with Intellectual Disability
Hanzlíčková, Lucie ; Maulisová, Alice (advisor) ; Lukavský, Jiří (referee)
The diploma thesis called Memory functions in children with intellectual dissability is devoted to mapping cognitive functions, specifically with a focus on memory functions in children with diagnostically confirmed the mild mental retardation. The origin of the thesis is associated and based on the standardization of incipient Neuropsychological Battery for Children (NB-C) and with the necessity to validate the method in different clinical groups. The aim was to assess how children with cognitive deficits, especially with the mild mental retardation, react and score in the memory's subtests. The main goal of this thesis is to assess the level of memory functions of these children. Furthermore, attention is focused on the comparison of key memory's domains based on the administration of the Neuropsychological Battery for Children and the inteligence test WISC- III in comparison with a comparative group of children without cognitive deficits. The theoretical and literary review section is focused on three key areas. The first of them presents the topic of memory, its distribution within the framework of the processes and systems, currently diagnostic methods, and also the development of memory functions. The following chapter focuses on disorders of the intellect, the terminological background of...
Emotion Recognition based on Visual and Auditory Cues
Hrdličková, Kristýna ; Lukavský, Jiří (advisor) ; Pešout, Ondřej (referee)
In its theoretical part, this paper examines the ability to recognize emotions and its ontogenetic development across modalities, including the influences affecting this ability. Attention is paid to the most used research designs and stimulus selection. It also presents findings on possible sensory dominance in children. The method and results of the quantitative research conducted are also described. Children aged 4-7 years (N = 18), 8-11 years (N = 18) and adults (N = 24) participated in the experiment. They were sequentially presented with four blocks of emotional stimuli depicting the emotions of joy and fear: separate video recordings of facial expressions; separate audio recordings of sentences in English; simultaneously video and audio recordings with instructions to ignore the video; and simultaneously video and audio recordings with instructions to ignore the audio. The groups did not differ in their ability to recognize emotions from facial expressions (in both the unimodal and multimodal conditions) and emotions from voice in the congruent multimodal condition. Younger children were less successful than older children and adults in recognizing emotions from voice in the unimodal condition, and younger children and older children were less successful than adults in recognizing emotions...
Space maps for human-like agents
Kotrla, Jakub ; Brom, Cyril (advisor) ; Lukavský, Jiří (referee)
The goal of this thesis is to create model of spatial map for human-like agent living in virtual world. The model will increase agent's ability to mimic some aspects of human behaviour. These includes inaccuracy of spatial memories, gradual learning and forgetting. In thesis we introduce model based on results of research of places cells. Spatial map consists of nodes that are at rst distributed uniformly in the world. Virtual agent wanders through world and perceive surrounding objects. Spatial map gradually changes distribution of nodes in world according to agent's perceptions. Model is able to recognize areas with higher count of objects and create concepts of places. Algorithms of model are described including their time complexity. Model was implemented in Python and tested. At the end of thesis we present several possible extensions and future work.
Modelling eye movements during Multiple Object Tracking
Děchtěrenko, Filip ; Lukavský, Jiří (advisor) ; Toth, Peter Gabriel (referee)
In everyday situations people have to track several objects at once (e.g. driving or collective sports). Multiple object tracking paradigm (MOT) plausibly simulate tracking several targets in laboratory conditions. When we track targets in tasks with many other objects in scene, it becomes difficult to discriminate objects in periphery (crowding). Although tracking could be done only using attention, it is interesting question how humans plan their eye movements during tracking. In our study, we conducted a MOT experiment in which we presented participants repeatedly several trials with varied number of distractors, we recorded eye movements and we measured consistency of eye movements using Normalized scanpath saliency (NSS) metric. We created several analytical strategies employing crowding avoidance and compared them with eye data. Beside analytical models, we trained neural networks to predict eye movements in MOT trial. The performance of the proposed models and neuron networks was evaluated in a new MOT experiment. The analytical models explained variability of eye movements well (results comparable to intraindividual noise in the data); predictions based on neural networks were less successful.
Comparison of scan patterns in dynamic tasks
Děchtěrenko, Filip ; Lukavský, Jiří (advisor) ; Nyström, Marcus (referee) ; Paluš, Milan (referee)
Eye tracking is commonly used in many scientific fields (experimental psychology, neuroscience, behavioral economics, etc.) and can provide us with rigorous data about current allocation of attention. Due to the complexity of data processing and missing methodology, experimental designs are often limited to static stimuli; eye tracking data is analyzed only with respect to basic types of eye movements - fixation and saccades. In dynamic tasks (e.g. with dynamic stimuli, such as showing movies or Multiple Object Tracking task), another type of eye movement is commonly present: smooth pursuit. Importantly, eye tracking data from dynamic tasks is often represented as raw data samples. It requires a different approach to analyze the data, and there are a lot of methodological gaps in analytical tools. This thesis is divided into three parts. In the first part, we gave an overview of current methods for analyzing scan patterns, followed by four simulations, in which we systematically distort scan patterns and measure the similarity using several commonly used metrics. In the second part, we presented the current approaches to statistical testing of differences between groups of scan patterns. We present two novel strategies for analyzing statistically significant differences between groups of scan patterns and...
Cognitive Mechanisms Associated with Proneness to Halutinations
Say, Nicolas ; Lukavský, Jiří (advisor) ; Raudenská, Jaroslava (referee)
Hallucinations are often seen as a serious symptom of mental illness. Nonetheless, recent decades have produced a body of evidence that documented the presence of hallucinations even in non-clinical samples. Therefore, focusing on these samples is critical for improving understanding of processes underlying auditory hallucinations. The present study examines cognitive mechanisms that have been proposed to influence proneness to auditory hallucinations. A battery of experimental measures is implemented to assess some of the mechanisms implicated in the aetiology of hallucinations. Source monitoring, cognitive inhibition, bottom-up processes, working memory and traumatic experiences were measured in a laboratory study of 52 participants. Findings suggest that proneness to hallucinations is associated with impaired top-down processing and early traumatic experiences. No association between other cognitive mechanisms and hallucination proneness, contrary to previous evidence, has been found. This indicates that impaired source memory, working memory and bottom-up processing impairments might distinguish clinical and non-clinical hallucinators. An alternative implication of these findings points at issues with reproducibility in the hallucination research. Keywords: Auditory verbal hallucinations,...
Possible ratings for photographs
Kubát, Petr ; Lukavský, Jiří (advisor) ; Smolík, Filip (referee)
This thesis addresses the question of the perception of photographs. It is based on the work of R. Greene and A. Oliva (2008) and further expands it. These authors investigated which global properties people identify on photographs of natural scenes and how consistent their evaluation of these properties is. In this paper I used general photographs without any thematic limitations. In the first part of the research I examined what global properties people determine during a quick viewing of a general photograph. The obtained general properties (movement limitation and fun) were added to the properties found in R. Greene's and A. Oliva's work. In the second part of the research I used a computer program for hierarchical grouping to determine how consistent the rating of these global properties is when different people rate the photographs. The resulting consistency is expressed as the average of all interobserver correlations for a given property. The experiment revealed that the transience property has the highest consistency rate (r=0,516), followed by movement in the scene (r=0,457) and openness (r=0,450). Fun (r=0,283) and navigability (r=0,245) exhibit the lowest rate of consistency. Lower concordance observed with general photographs is in my opinion caused by the higher complexity of the...

National Repository of Grey Literature : 83 records found   1 - 10nextend  jump to record:
See also: similar author names
1 Lukavský, Jakub
19 Lukavský, Jaromír
1 Lukavský, Jindřich
Interested in being notified about new results for this query?
Subscribe to the RSS feed.