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41.
This study investigated global versus local pitch pattern perception in children with dyslexia aged between 8 and 11 years. Children listened to two consecutive 4-tone pitch sequences while performing a same/different task. On the different trials, sequences either preserved the contour (local condition) or they violated the contour (global condition). Compared to normally developing children, dyslexics showed robust pitch perception deficits in the local but not the global condition. This finding was replicated in a simple pitch direction task, which minimizes sequencing and short term memory. Results are consistent with a left-hemisphere deficit in dyslexia because local pitch changes are supposedly processed by the left hemisphere, whereas global pitch changes are processed by the right hemisphere. The present data suggest a link between impaired pitch processing and abnormal phonological development in children with dyslexia, which makes pitch pattern processing a potent tool for early diagnosis and remediation of dyslexia. 相似文献
42.
Jannati A Spalek TM Lagroix HE Di Lollo V 《Journal of experimental psychology. Human perception and performance》2012,38(1):161-168
Identification of the second of two targets (T2) is impaired when presented shortly after the first (T1). This attentional blink (AB) is thought to arise from a delay in T2 processing during which T2 is vulnerable to masking. Conventional studies have measured T2 accuracy which is constrained by the 100% ceiling. We avoided this problem by using a dynamic threshold-tracking procedure that is inherently free from ceiling constraints. In two experiments we examined how AB magnitude is affected by three masking-related factors: (a) presence/absence of T2 mask, (b) T2-mask stimulus onset asynchrony (SOA), and (c) level of T2 impoverishment (signal-to-noise ratio [SNR]). In Experiment 1, overall accuracy decreased with T2-mask SOA. The magnitude of the AB, however, was invariant with SOA and with mask presence/absence. Experiment 2 further showed that the AB was invariant with T2 SNR. The relationship among mask presence/absence, SOA, and T2 SNR and the AB is encompassed in a qualitative model. 相似文献
43.
We describe a multiple-route model of reading development in which coarse-grained orthographic processing plays a key role in optimizing access to semantics via whole-word orthographic representations. This forms part of the direct orthographic route that gradually replaces phonological recoding during the initial phases of reading acquisition. The model predicts distinct developmental trajectories for pseudo-homophone and transposed-letter effects - two benchmark phenomena associated with phonological recoding and coarse-grained orthographic processing, respectively. Pseudo-homophone effects should decrease over the first years of reading acquisition, whereas transposed-letter effects should initially increase. These predictions were tested in a lexical decision task with 334 children in grades 1-5, and 29 skilled adult readers. In line with the predictions, we found that the pseudo-homophone effect diminished as reading level increased, whereas the transposed-letter effect first increased and then diminished. 相似文献
44.
Dufau S Grainger J Ziegler JC 《Journal of experimental psychology. Learning, memory, and cognition》2012,38(4):1117-1128
We describe a leaky competing accumulator (LCA) model of the lexical decision task that can be used as a response/decision module for any computational model of word recognition. The LCA model uses evidence for a word, operationalized as some measure of lexical activity, as input to the YES decision node. Input to the NO decision node is simply a constant value minus evidence for a word. In this way, evidence for a nonword is a function of time from stimulus onset (as in standard deadline models) modulated by lexical activity via the competitive dynamics of the LCA. We propose a simple mechanism for determining the value of this constant online during the first trials of a lexical decision experiment, such that the model can rapidly optimize speed and accuracy in discriminating words from nonwords. Further optimization is achieved via trial-by-trial adjustments in response criteria as a function of task demands and list context. We show that the LCA model can simulate mean response times and response distributions for correct and incorrect YES and NO decisions for a number of benchmark experiments that have been shown to be fatal for deadline models of lexical decision. Finally, using lexical activity calculated by a computational model of word recognition as input to the LCA decision module, we provide the first item-level simulation of both word and nonword responses in a large-scale database. 相似文献
45.
Besharat MA 《Psychological reports》2011,108(1):317-328
This study aimed to examine factorial and cross-cultural validity of a Farsi version of the Anger Rumination Scale. 933 undergraduate students (388 men, 545 women) from the University of Tehran participated. The Farsi version of the Anger Rumination Scale, the Tehran Multidimensional Anger Scale, and the Mental Health Inventory were completed by all participants. Results supported the four-factor structure, convergent and discriminant validity, internal consistency, and test-retest reliability of the Farsi version of the Anger Rumination Scale. The factors found in the Farsi version of the Anger Rumination Scale are similar to the factors found in previous studies and were accordingly labeled as Angry Afterthoughts, Thoughts of Revenge, Angry Memories, and Understanding Causes. The results also provided evidence for applicability of the Farsi version of the Anger Rumination Scale and its cross-cultural validity. 相似文献
46.
Ibrahim AM 《Psychological reports》2011,109(1):252-258
Previous research on the effect of class size on student ratings of instruction has primarily investigated the effect of class size on the favorableness of these ratings rather than its effect on their reliability (dependability). A few studies have used "generalizability theory" to demonstrate the relative effect of class size on the dependability of student ratings of instruction. The purpose of the present study was to test the validity of the findings of these studies in a different cultural setting using a different student ratings questionnaire. Using a random-effect analysis of variance to estimate the variance components for a design in which students were nested within classes and crossed with items, it was found that the variance component for class size was appreciably larger than that for items. At least 20 students were needed to obtain a generalizability coefficient for relative decisions of .70 or more. Increasing the number of students has a greater effect on generalizability coefficients than increasing the number of items. 相似文献
47.
Purpose
To find out what information children, parents and education staff feel would be important to know to support a child who stutters in the educational environment, in order to develop appropriate resources.Method
A Delphi study was carried out to seek the opinions of experts about the information to include. A structured six stage process was completed in order to gain consensus within four expert panels: children who stutter (CWS) aged 7-11 (n = 25); young people who stutter aged 12-18 (n = 27); parents of children and young people who stutter aged 2-18 (n = 67); and members of the education workforce (n = 35).Results
In response to the questions, 538 statements were generated across the four expert panels, categorised and reduced to 276. Of the 154 rating questionnaires sent out, 99 were returned (64.2% response rate). The top 32 statements, which were those most highly rated and with the greatest consensus, were retained to inform the resources.Conclusions
This study demonstrates the value of including service users when devising materials aimed for the benefit of CWS. The methodology employed ensured that ideas, perceptions and needs were representative of a range of people who experience stuttering from different perspectives. The results indicated that each expert panel had different priorities of what should be included. The resulting resources may therefore be considered to have high content validity and would be predicted to meet the needs of those who require them.Educational Objectives: The reader will be able to (1) define the Delphi Approach (2) discuss the development of a user led resource for raising awareness about stuttering. 相似文献48.
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