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251.
Previous research comparing detection times for syllables and for phonemes has consistently found that syllables are responded to faster than phonemes. This finding poses theoretical problems for strictly hierarchical models of speech recognition, in which smaller units should be able to be identified faster than larger units. However, inspection of the characteristics of previous experiments’ stimuli reveals that subjects have been able to respond to syllables on the basis of only a partial analysis of the stimulus. In the present experiment, five groups of subjects listened to identical stimulus material. Phoneme and syllable monitoring under standard conditions was compared with monitoring under conditions in which near matches of target and stimulus occurred on no-response trials. In the latter case, when subjects were forced to analyze each stimulus fully, phonemes were detected faster than syllables. 相似文献
252.
Dennis Norris James M. Mcqueen Anne Cutler Sally Butterfield 《Cognitive psychology》1997,34(3):191-243
We propose that word recognition in continuous speech is subject to constraints on what may constitute a viable word of the language. This Possible-Word Constraint (PWC) reduces activation of candidate words if their recognition would imply word status for adjacent input which could not be a word - for instance, a single consonant. In two word-spotting experiments, listeners found it much harder to detectapple,for example, infapple(where [f] alone would be an impossible word), than invuffapple(wherevuffcould be a word of English). We demonstrate that the PWC can readily be implemented in a competition-based model of continuous speech recognition, as a constraint on the process of competition between candidate words; where a stretch of speech between a candidate word and a (known or likely) word boundary is not a possible word, activation of the candidate word is reduced. This implementation accurately simulates both the present results and data from a range of earlier studies of speech segmentation. 相似文献
253.
Anne Cutler Brit Van Ooijen Dennis Norris Rosa Sánchez-Casas 《Attention, perception & psychophysics》1996,58(6):807-822
In four experiments, listeners’ response times to detect vowel targets in spoken input were measured. The first three experiments were conducted in English. In two, one using real words and the other, nonwords, detection accuracy was low, targets in initial syllables were detected more slowly than targets in final syllables, and both response time and missed-response rate were inversely correlated with vowel duration. In a third experiment, the speech context for some subjects included all English vowels, while for others, only five relatively distinct vowels occurred. This manipulation had essentially no effect, and the same response pattern was again observed. A fourth experiment, conducted in Spanish, replicated the results in the first three experiments, except that miss rate was here unrelated to vowel duration. We propose that listeners’ responses to vowel targets in naturally spoken input are effectively cautious, reflecting realistic appreciation of vowel variability in natural context. 相似文献
254.
Dennis Norris 《Cognition》1982,11(1):97-101
A criterion which has been proposed for distinguishing minds from computing systems is examined from the point of view of some current work on computer induction. 相似文献
255.
Jasmin K. Riad Fran H. Norris R. Barry Ruback 《Journal of applied social psychology》1999,29(5):918-934
The complex and somewhat bewildering phenomenon of why people sometimes decide not to evacuate from a dangerous situation is influenced by a combination of individual characteristics and 3 basic social psychological processes: (a) risk perception, (b) social influence, and (c) access to resources. This study used a combined sample of 777 adults interviewed after Hurricanes Hugo and Andrew. Although numerous variables significantly predicted evacuation, much variance in this behavior still remained unexplained. Different population subgroups gave different reasons for not evacuating (e.g., severeness of storm, territoriality). A multifaceted and tailored approach to both individuals and communities is needed; a simple warning is often not enough. 相似文献
256.
A dual-route approach was used as an initial framework to examine the relation between presentation format and lexical processing in a naming task. In Experiments 1 and 3, words were presented in lowercase versus case-alternated format. Presentation format interacted with word frequency and regularity: For irregular words (e.g., pint), case alternation was additive with frequency, whereas for regular words (e.g., mint), case alternation and frequency interacted. Experiment 2 dissociated the locus of case-alternation effects from those of stimulus intensity. Stimulus intensity was additive with frequency and regularity, suggesting that whereas stimulus intensity affects encoding, case alternation affects lexical processing at a postencoding stage in the word recognition system. It was concluded that a dual-route approach provides a suggestive but incomplete account of how case alternation influences lexical processing. As an alternative to a dual-route approach, we show that the present results can be addressed and successfully simulated using an implemented version of Norris's (1994) multilevel model. 相似文献
257.
Fran H. Norris 《Journal of applied social psychology》1990,20(20):1704-1715
A short screening instrument for detecting the occurrence and impact of traumatic events is presented. It is proposed that a relevant event population for assessing exposure to traumatic events comprises “violent encounters with nature, technology, or humankind” and that loss, scope, threat, blame, familiarity, and post-traumatic stress are the dimensions of the experience that are most critical to assess. It is estimated that 8% of the U.S. adult population will experience one or more of the selected events within a year's time. Potential uses and contributions of the instrument are discussed. 相似文献
258.
As part of a larger panel study, interviews were obtained from 3 samples of older adults: 45 persons who had recently lost a spouse, 40 who had lost a parent or child, and 45 who were not bereaved. Assessments were conducted before and after the deaths. In the widowed sample, health remained quite stable, but depression increased sharply, then remained elevated. Changes were minimal in the sample who had lost a parent or child and in the nonbereaved sample. Multiple regression procedures were used to identify factors that contribute to depression and health 9 months after the spouse's death. Postbereavement depression was associated with higher prebereavement depression, higher financial pressures, higher global stress, fewer new interests, and lower social support. Health was a function of prebereavement health, new interests, financial pressures, and global stress. In general, life events and resources had stronger effects in the widowed sample than in the comparison samples. 相似文献
259.
A path model illustrating the relationships between church attendance, delinquent peer association, tendency to neutralize delinquency, and self-reported delinquent behavior was compared between males and females and between Mexican-American and Anglo college students (N = 694). The structure of the relationships among these variables was found to be similar across all four subsamples, although there was some variation in the strength of the relationships. In all four subsamples, the strongest paths were between neutralization and delinquent behavior, especially among Anglos and among males, and the weakest paths were between church attendance and delinquent behavior. On the other hand, church attendance was more strongly related to having fewer delinquent peers among Anglos and females. The path models explained substantial amounts of variation in delinquent behavior: 38% among Anglos, 32% among females, 31% among males, and 30% among Mexican-Americans. 相似文献
260.
Kimberley Brennan-Parks Murray Goddard Alexander E. Wilson Lori Kinnear 《Sex roles》1991,24(5-6):375-382
Previous research suggests females smile more than males in a picture taking task (Mills, 1984; Morse, 1982; Ragan, 1982). Experiment 1 sought to replicate this effect and, in addition, investigate if the gender of the photographer or instructions to smile would influence smiling in females and males. Subjects were told that their picture would be used in a subsequent facial perception study. Results showed that subjects instructed to smile smiled more than subjects given no instructions. There were no main effects for subject's or photographer's gender and no interactions. In Experiment 2, graduating students from the University of New Brunswick, Saint John, completed a questionnaire which assessed how much subjects wanted to smile for their yearbook picture, whether subjects selected a picture of themselves smiling for their yearbook, and how much the photographer encouraged them to smile. Experiment 2 showed that females wished to smile significantly more than males, and females selected a picture of themselves smiling significantly more than males. Males and females did not differ in the reported degree to which the photographer encouraged them to smile. Results from Experiments 1 and 2 suggest that sex differences in smiling as measured in a picture taking task depend critically on the situation in which the picture is taken. 相似文献