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121.
An acoustic-perceptual investigation of a phonological phenomenon in which stress is retracted in double-stressed words (e.g., thirTEEN vs THIRteen MEN) was undertaken to identify the locus of functional impairments in speech prosody. Subjects included left-hemisphere-damaged (LHD) and right-hemisphere-damaged (RHD) patients and nonneurological controls. They were instructed to read sentences containing double-stressed target words in the presence of a clause boundary or its absence. Whereas all three groups of subjects were capable of manipulating the acoustic parameters that signal a shift in stress, there were some differences between the performance of the patient groups and that of the normal controls. Further, stress production deficits were more severe in LHD aphasic patients than in RHD patients. LHD speakers exhibited deficits in the control of both temporal and F0 cues. Their F0 disturbance appears to be secondary to a primary deficit in temporal control at the phase or sentence level, as an increased number of continuation rises found for the LHD patients seemed to arise from lengthy pauses within sentences. Findings are highlighted to address the nature of breakdown in speech prosody and the competing views of prosodic lateralization. 相似文献
122.
Adolescents (N = 107; M = 12.23 years, SD = 1.09 months) participated in a two-part study examining peer victimization, neuroendocrine functioning, and physical health. In phase 1, adolescents completed questionnaires assessing peer victimization and health. They returned for phase 2 which consisted of two sessions. In session 1, adolescents learned to collect salivary cortisol samples; they collected four samples over 2 non-sports school days. In session 2, adolescents completed the Trier Social Stress Test (TSST) in which they prepared and delivered a speech while cortisol was collected. Peer victimization predicted poor health outcomes and a flattened cortisol awakening response (CAR); this CAR was linked with health problems. During the TSST, victims reported more stress and exhibited altered cortisol levels. Higher cortisol immediately after the stressor and lower cortisol 30 min after the stressor were associated with more health problems. This study provides evidence that the relationship between peer victimization and poor physical health may be explained by differences in neuroendocrine functioning. 相似文献
123.
Baum WM 《The Behavior analyst / MABA》2011,34(2):185-200
Viewing the science of behavior (behavior analysis) to be a natural science, radical behaviorism rejects any form of dualism, including subjective-objective or inner-outer dualism. Yet radical behaviorists often claim that treating private events as covert behavior and internal stimuli is necessary and important to behavior analysis. To the contrary, this paper argues that, compared with the rejection of dualism, private events constitute a trivial idea and are irrelevant to accounts of behavior. Viewed in the framework of evolutionary theory or for any practical purpose, behavior is commerce with the environment. By its very nature, behavior is extended in time. The temptation to posit private events arises when an activity is viewed in too small a time frame, obscuring what the activity does. When activities are viewed in an appropriately extended time frame, private events become irrelevant to the account. This insight provides the answer to many philosophical questions about thinking, sensing, and feeling. Confusion about private events arises in large part from failure to appreciate fully the radical implications of replacing mentalistic ideas about language with the concept of verbal behavior. Like other operant behavior, verbal behavior involves no agent and no hidden causes; like all natural events, it is caused by other natural events. In a science of behavior grounded in evolutionary theory, the same set of principles applies to verbal and nonverbal behavior and to human and nonhuman organisms. 相似文献
124.
125.
The relationship of entrepreneurial traits, skill, and motivation to subsequent venture growth 总被引:4,自引:0,他引:4
Previous research on entrepreneurship as well as goal, social-cognitive, and leadership theories has guided hypotheses regarding the relationship between entrepreneurial traits and skill (passion, tenacity, and new resource skill) and situationally specific motivation (communicated vision, self-efficacy, and goals) to subsequent venture growth. Data from 229 entrepreneur-chief executive officers and 106 associates in a single industry were obtained in a 6-year longitudinal study. Structural equation modeling revealed a web of relationships that impact venture growth. Goals, self-efficacy, and communicated vision had direct effects on venture growth, and these factors mediated the effects of passion, tenacity, and new resource skill on subsequent growth. Furthermore, communicated vision and self-efficacy were related to goals, and tenacity was related to new resource skill. 相似文献
126.
The present investigation focussed on the neural substrates underlying linguistic distinctions that are signalled by prosodic cues. A production experiment was conducted to examine the ability of left- (LHD) and right- (RHD) hemisphere-damaged patients and normal controls to use temporal and fundamental frequency cues to disambiguate sentences which include one or more Intonational Phrase level prosodic boundaries. Acoustic analyses of subjects' productions of three sentence types-parentheticals, appositives, and tags-showed that LHD speakers, compared to RHD and normal controls, exhibited impairments in the control of temporal parameters signalling phrase boundaries, including inconsistent patterns of pre-boundary lengthening and longer-than-normal pause durations in non-boundary positions. Somewhat surprisingly, a perception test presented to a group of normal native listeners showed listeners experienced greatest difficulty in identifying the presence or absence of boundaries in the productions of the RHD speakers. The findings support a cue lateralization hypothesis in which prosodic domain plays an important role. 相似文献
127.
Two experiments were conducted to examine the ability of left- (LHD) and right-hemisphere-damaged (RHD) patients and normal controls to use temporal cues in rendering phrase grouping decisions. The phrase "pink and black and green" was manipulated to signal a boundary after "pink" or after "black" by altering pre-boundary word durations and pause durations at the boundary in a stepwise fashion. Stimuli were presented to listeners auditorily along with a card with three alternative groupings of colored squares from which to select the presented alternative. Results revealed that normal controls were able to use both temporal cues to identify the intended grouping. In contrast, LHD patients required longer than normal pause durations to consistently identify the intended grouping, suggesting a higher than normal threshold for perception of temporal prosodic cues. Surprisingly, the RHD patients exhibited great difficulty with the task, perhaps due to the limited acoustic cues available in the stimuli. 相似文献
128.
Baum N 《Family process》2003,42(1):117-131
This study examines the association between two sets of divorce process variables, a) initiation of and responsibility for the divorce and b) difficulty and duration of the legal procedure, and divorced spouses' co-parental relationship and parental functioning. In a random sample of 50 former couples, in Israel, findings showed that the longer and more conflictual the legal proceedings, the worse the coparental relationship in the view of both parents. They also showed that mothers' parental functioning was not significantly associated with any of the divorce variables, but fathers' were. The more responsibility the father assumed for the divorce and the more he viewed himself as the initiator, the more he fulfilled his parental functions. The findings are interpreted in the discussion, and their theoretical and practical implications considered. 相似文献
129.
S R Baum 《Brain and language》1989,37(2):327-338
Seven agrammatic Broca's aphasics and ten normal control subjects performed a word-monitoring task to determine the degree to which violations of syntax would affect word-monitoring performance. Both local and long-distance dependencies were explored, as well as the effects of additional interceding words. Results indicated that normal subjects' word-monitoring latencies were significantly slower to target words in ungrammatical contexts for both local and long-distance dependencies. Aphasic subjects showed a significant sensitivity to ungrammaticality in the local dependency condition; for the long-distance dependencies, however, no reaction time difference emerged between grammatical and ungrammatical stimuli. Results are discussed in relation to current theories of the nature of agrammatic deficits. 相似文献
130.
This study examined the hypothesis that chronic stress contributes to heightened cardiovascular reactivity. Chronic stress was operationalized as crowding stress associated with commercial-residential mixes in high-density neighborhoods. Seventeen residents of crowded neighborhoods and 24 residents of uncrowded neighborhoods worked on a challenging task while blood pressure and heart rate were measured. Self-report and biochemical measures indicated that the two groups differed in level of chronic stress. Results also indicated that chronic stress contributes to cardiovascular reactivity. Crowded residents showed greater increases in systolic and diastolic blood pressure and heart rate and took longer to return to baseline than did uncrowded residents. The few differences found between Type A and Type B residents were found only in the low-stress group. 相似文献