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261.
Sheila E. Blumstein Bonnie Katz Harold Goodglass Robin Shrier Barbara Dworetsky 《Brain and language》1985,24(2):246-265
The present study investigates the effects of slowed speech on auditory comprehension in aphasia. Specifically, an attempt was made to isolate the effects of added time on comprehension at the language processing stages of auditory perception, by increasing the duration of the vowel segments in each word; word recognition and semantic analysis, by adding silences between words; and syntactic analysis, by adding silences at constituent phrase boundaries. Sentences were also read at a slow rate to see the effects of naturally slowed speech on sentence comprehension. Test sentences consisted of simple active and passive declarative sentences, and complex sentences with embedded medial and final relative clauses. Sentences were either semantically reversible or nonreversible. Thirty-four aphasic patients who varied in both severity and type of aphasia were tested on a picture verification task. Results indicated that slowing facilitated language comprehension significantly only in the syntactic condition. Neither syntactic complexity nor semantic reversibility interacted with slowed speech to facilitate auditory language comprehension. Further, it was only the Wernicke's aphasics who showed significant improvement with time added at constituent boundaries. These results suggest that time alone does not facilitate language comprehension in aphasia, but that rather it is the interaction of time with syntactic processing which improves comprehension. 相似文献
262.
Francisco J. Donis Eric G. Heinemann Sheila Chase 《Attention, perception & psychophysics》1994,55(6):676-688
In the experiments described in this paper we examined the effects of contextual stimuli on pigeons’ recognition of visual patterns. Experiment z showed acontext-superiority effect. Specifically, two target forms that were identical except for location in the visual field were not discriminated when presented alone, but the compounds formed when each of these targets was placed between a nearby pair of flanking stimuli were readily discriminated. The size of the context-superiority effect decreased with increasing target-flanker separation. In Experiments 2 and 3 the two targets differed in form rather than spatial location and were readily discriminated in the absence of Hankers. Under these circumstances, adding an identical pair of flankers to each target resulted in a content-inferiority effect; that is, the two target-plus-Hankers compounds were less readily discriminated than the targets atone. The size of the context-inferiority effect decreased with increasing target-flanker separation. The observed effects of context are predictable from the Heinemann-Chase (1990) model of pattern recognition. 相似文献
263.
Josep Demestre Sheila Meltzer José E. García-Albea Andreu Vigil 《Journal of psycholinguistic research》1999,28(3):293-312
Event-related brain potentials (ERPs) were recorded during spoken language comprehension to study the on-line effects of gender agreement violations in controlled infinitival complements. Spanish sentences were constructed in which the complement clause contained a predicate adjective marked for syntactic gender. By manipulating the gender of the antecedent (i.e., the controller) of the implicit subject while holding constant the gender of the adjective, pairs of grammatical and ungrammatical sentences were created. The detection of such a gender agreement violation would indicate that the parser had established the coreference relation between the null subject and its antecedent. The results showed a complex biphasic ERP (i.e., an early negativity with prominence at anterior and central sites, followed by a centroparietal positivity) in the violating condition as compared to the non-violating conditions. The brain reacts to NP-adjective gender agreement violations within a few hundred milliseconds of their occurrence. The data imply that the parser has properly coindexed the null subject of an infinitive clause with its antecedent. 相似文献
264.
265.
Ann Marie Ryan Mark J. Schmit Diane L. Daum Stephane Brutus Sheila A. McCormick Michelle Haff Brodke 《Journal of business and psychology》1997,12(1):67-83
Pre-employment integrity tests assume differences between honest and dishonest individuals in their perceptions of the degree of dishonesty of given behaviors. This exploratory study investigated whether individuals classified as dishonest by an overt integrity test had different perceptions of the honesty of behaviors than those classified as honest. Differences in perceptions of situational factors promoting or deterring honesty were also examined. Dishonest individuals had different perceptions of behaviors and situations than honest individuals, suggesting that the relative influence of situational interventions may vary with the general integrity of a workforce. 相似文献
266.
267.
Sheila Redfern Christine P. Dancey Windy Dryden 《British Journal of Guidance & Counselling》1993,21(3):300-309
The importance of sex of counsellor, ethnicity, empathy and client-counsellor sex-pairings on clients' perceptions of the counsellor was investigated. 96 students were asked to rate black or white, male or female, and empathic or non-empathic counsellors, on attractiveness, expertness and trustworthiness. Contrary to previous research, sex of the counsellor, and sex of student-counsellor pairings, had no significant effect on counsellor ratings. Ethnicity of counsellor - which has been largely ignored in research until recently - was found to be a highly signifcant factor in students' ratings of the counsellor: black counsellors were rated significantly higher than white counsellors on attractiveness, expertness and trustworthiness. The importance of empathy as a requisite for the counselling process was supported: counsellors were rated higher on all three variables if they used an empathic approach. There were no interaction effects between the variables. 相似文献
268.
Wernicke's and Broca's-Conduction aphasics and a Global aphasic were presented with a lexical-decision task in which English words and pronounceable nonwords were preceded by semantically related, unrelated, or nonword primes. The patients were also given a simple semantic-judgment task using the word pairs from the lexical-decision task. Wernicke's aphasics performed similar to normals and Broca's-Conduction aphasics showing significantly shorter latencies in making real-word identifications when preceded by a semantically related word. In addition, both superordinate and coordinate associates showed semantic-priming effects. Performance on the semantic-judgment task showed significantly more impairment in the aphasic group than in the normal controls. These results suggest that aphasics with even severe language impairments retain stored semantic information that may be automatically activated, yet is inaccessible to conscious semantic decision during metalinguistic tasks. 相似文献
269.
270.
In this study, we attempted to determine whether phonetic disintegration of speech in Broca's aphasia affects the spectral characteristics of speech sounds as has been shown for the temporal characteristics of speech. To this end, we investigated the production of place of articulation in Broca's aphasics. Acoustic analysis of the spectral characteristics for stop consonants were conducted. Results indicated that the static aspects of speech production were preserved, as Broca's aphasics seemed to be able to reach the articulatory configuration for the appropriate place of articulation. However, the dynamic aspects of speech production seemed to be impaired, as their productions reflected problems with the source characteristics of speech sounds and with the integration of articulatory movements in the vocal tract. Listener perceptions of the aphasics' productions were compared with acoustic analyses for these same productions. The two measures were related; that is, the spectral characteristics of the utterances provided salient cues for place of articulation perception. An analysis of the occurrences of errors along the dimensions of voicing and place showed that aphasics rarely produce utterances containing both voice and place substitutions. 相似文献