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Eye Movement Patterns (eye + movement_pattern)
Selected AbstractsEye movements in German-speaking children with and without dyslexia when reading aloudACTA OPHTHALMOLOGICA, Issue 6 2010Susanne Trauzettel-Klosinski Acta Ophthalmol. 2010: 88: 681,691 Abstract. Purpose:, The phonological difficulty and orthographic regularity of a language influence reading strategies. Only a few studies have been conducted in readers of German, which has a high grapheme,phoneme correspondence. The aim of this study was to investigate, firstly, the influence of different levels of phonological difficulty of reading material in German on reading in children and, secondly, to compare the reading strategies of German children with findings in English-speaking readers. Methods:, Eye movements in 16 German children with dyslexia and 16 age-matched control children (mean age 9.5 ± 0.35 years) in the third and fourth grades of school were recorded by scanning laser ophthalmoscope while they read aloud two texts of differing levels of difficulty. Results:, In the dyslexia group, reading speed was slowed, and the number of saccades and regressions was raised markedly, although the percentage of regressions only slightly. The number of eye movements increased in both groups with increasing text difficulty, although much more in the dyslexia group than in the control group, whereas fixation duration was not influenced. Conclusions:, Phonological difficulty influences reading speed and eye movement pattern: children with dyslexia markedly increase their number of eye movements and analyse the text in smaller units per fixation, but keep fixation duration constant. This strategy reflects their favouring of the indirect, sublexical route of grapheme,phoneme conversion, whereas readers of English-language texts are more likely to prefer the whole-word approach, i.e. the direct, lexical route that is associated with orthographic memory. [source] Validity of ,post-traumatic stress disorder with secondary psychotic features': a review of the evidenceACTA PSYCHIATRICA SCANDINAVICA, Issue 1 2009M. H. Braakman Objective:, To review the evidence from empirical studies regarding the validity of ,post-traumatic stress disorder with secondary psychotic features' (PTSD-SP) as a separate diagnostic entity. Method:, The authors performed a review tracing publications between 1980 and January 2008. Results:, Twenty-four comparative studies were included. These studies indicate that PTSD-SP is a syndrome that comprises PTSD-symptoms followed in time by the additional appearance of psychotic features. The psychotic features are not confined to episodes of re-experiencing, but remain present continuously. PTSD-SP seems to have some biological features differentiating it from schizophrenia and PTSD, e.g. there are differences in smooth pursuit eye movement patterns, concentrations of corticotropin-releasing factor and dopamine ,-hydroxylase activity. Conclusion:, There is currently not yet full support for PTSD-SP as a nosological entity. However, the delineation of PTSD-SP from other psychiatric syndromes is notable and biological studies seem to support the validity as a separate diagnostic entity. [source] The relationship between indecisiveness and eye movement patterns in a decision making informational search taskJOURNAL OF BEHAVIORAL DECISION MAKING, Issue 4 2010Andrea L. Patalano Abstract Indecisiveness is a trait-related general tendency to experience decision difficulties across a variety of situations, leading to decision delay, worry, and regret. Indecisiveness is proposed (Rassin, 2007) to be associated with an increase in desire for information acquisition and reliance on compensatory strategies,as evidenced by alternative-based information search,during decision making. However existing studies provide conflicting findings. We conducted an information board study of indecisiveness, using eye tracking methodology, to test the hypotheses that the relationship between indecisiveness and choice strategy depends on being in the early stage of the decision making process, and that it depends on being in the presence of an opportunity to delay choice. We found strong evidence for the first hypothesis in that indecisive individuals changed shift behavior from the first to the second half of the task, consistent with a move from greater to lesser compensatory processing, while the shift behavior of decisive individuals suggested lesser compensatory processing over the whole task. Indecisiveness was also related to time spent viewing attributes of the selected course, and to time spent looking away from decision information. These findings resolve past discrepancies, suggest an interesting account of how the decision process unfolds for indecisive versus decisive individuals, and contribute to a better understanding of this tendency. Copyright © 2009 John Wiley & Sons, Ltd. [source] Measuring attentional bias to peripheral facial deformitiesTHE LARYNGOSCOPE, Issue 3 2009Lisa Ishii MD Abstract Objectives: Introduce a novel method for objectively evaluating attentional bias to peripheral facial deformities using an established metric of attention. Methods: The SMI eye-tracker system (SensoMotoric Inc., Boston, MA) was used to record the eye movement patterns, called scanpaths, of eight naïve observers gazing at pictures of faces with or without peripheral surgical deformities. The scanpaths of observers gazing on those novel faces were compared, and the fixation durations for different facial regions were compared between faces. Results: There were statistically significant differences in the mean fixation times between the faces considered normal and those considered abnormal (those with an obvious defect). When multivariate analysis of variance was performed with dependent variables total fixation time, fixation time in central triangle, and fixation time in the defect region and the independent variable face, all four tests were highly statistically significant. When univariate analysis of variance was performed to test the hypothesis that defect fixation times varied by face, the results were highly statistically significant (F = 8.79, P = .0003). Conclusions: Observers gazing on faces typically focus their attention on discriminating features, such as eyes, nose, and mouth. The well-established method of eye movement recordings was applied in a novel way to provide quantitative data showing changes in observer gaze patterns to focus on deformities. These gaze patterns are a direct reflection of observer attention. This is the first objective method to quantify the amount of distraction caused by peripheral facial deformities and may provide insight into the perception of facial deformity. Laryngoscope, 119:459,465, 2009 [source] | ||||||||||