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401.
The legibility of the letters in the Latin alphabet has been measured numerous times since the beginning of experimental psychology. To identify the theoretical mechanisms attributed to letter identification, we report a comprehensive review of literature, spanning more than a century. This review revealed that identification accuracy has frequently been attributed to a subset of three common sources: perceivability, bias, and similarity. However, simultaneous estimates of these values have rarely (if ever) been performed. We present the results of two new experiments which allow for the simultaneous estimation of these factors, and examine how the shape of a visual mask impacts each of them, as inferred through a new statistical model. Results showed that the shape and identity of the mask impacted the inferred perceivability, bias, and similarity space of a letter set, but that there were aspects of similarity that were robust to the choice of mask. The results illustrate how the psychological concepts of perceivability, bias, and similarity can be estimated simultaneously, and how each make powerful contributions to visual letter identification. 相似文献
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This article presents GazeAlyze, a software package, written as a MATLAB (MathWorks Inc., Natick, MA) toolbox developed for the analysis of eye movement data. GazeAlyze was developed for the batch processing of multiple data files and was designed as a framework with extendable modules. GazeAlyze encompasses the main functions of the entire processing queue of eye movement data to static visual stimuli. This includes detecting and filtering artifacts, detecting events, generating regions of interest, generating spread sheets for further statistical analysis, and providing methods for the visualization of results, such as path plots and fixation heat maps. All functions can be controlled through graphical user interfaces. GazeAlyze includes functions for correcting eye movement data for the displacement of the head relative to the camera after calibration in fixed head mounts. The preprocessing and event detection methods in GazeAlyze are based on the software ILAB 3.6.8 Gitelman (Behav Res Methods Instrum Comput 34(4), 605-612, 2002). GazeAlyze is distributed free of charge under the terms of the GNU public license and allows code modifications to be made so that the program's performance can be adjusted according to a user's scientific requirements. 相似文献
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Dettenborn L Muhtz C Skoluda N Stalder T Steudte S Hinkelmann K Kirschbaum C Otte C 《Stress (Amsterdam, Netherlands)》2012,15(3):348-353
Depression has been linked to increased cortisol concentrations using point measures taken from urine, blood, or saliva samples. However, with regard to hypercortisolism-induced consequences, long-term cumulative cortisol burden is of relevance. Our objective was to use hair analysis as a new method to assess cortisol exposure over 6 months in depressed patients and healthy controls. We examined 23 depressed patients (8 men and 15 women, mean age: 41.6 years (?±?standard deviation (SD), 13.1 years); mean duration of current depressive episode 9 months (?±?SD, 13 months)) and 64 healthy controls, matched for age and gender. Cortisol concentrations in two 3-cm hair segments from near to the scalp were analyzed, representing cortisol secretion during the 6 months prior to sampling. Compared with healthy individuals, depressed patients had higher hair cortisol concentrations in the first (mean?±?SD: 26.7?±?20.8 vs. 18.7?±?11.5?pg/mg, p?0.05) and second hair segment (mean ± SD: 21.9?±?23.7 vs. 13.4?±?9.6?pg/mg, p?0.05). In conclusion, hair cortisol analysis confirmed enhanced cortisol secretion in depressed patients over a prolonged time period. Because of the retrospective and cumulative nature of cortisol in hair, the assessment of hair cortisol concentration may help in addressing unanswered questions regarding hypothalamic-pituitary-adrenal axis overactivity and associated health consequences in psychiatric disorders. 相似文献
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AbstractThe present meta-analysis investigates gender differences in the 24 VIA character strengths. Based on a literature search on quantitative studies that assessed character strengths, 65 samples consisting of both published and unpublished data were included (total N = 1,189,924). A random-effects model yielded significant gender differences for 17 of the 24 character strengths, although only four of these differences showed at least small effects: Females scored higher than males in appreciation of beauty and excellence, kindness, love, and gratitude. Thus, males and females were mostly similar in their character strengths. The size of the gender differences did not vary with nationality (i.e. the US, Switzerland, Germany, and Israel), while age and type of measure were significant moderators for 13-14 character strengths. The most pronounced differences emerged between children/adolescents and the VIA-Youth in comparison to adults and the VIA-IS as well as the short measures. 相似文献
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