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31.
This study investigated the effect of different types of distractions related to use of a hands-free phone on driving performance. The study used three types of verbal distractors: casual conversation, simple arithmetic number guessing, and number adding, in the phone conversation. 12 adults were instructed to follow a lead vehicle on a closed-course highway in a fixed-based driving simulator. The results showed that use of a hands-free cellular phone involving verbal and cognitive distractions impaired driving performance and skill. Types of distraction produced significantly different effects on several dependent variables: the driving speed, headway (distance between the lead car and the manipulated car), brake reaction time, and number of collisions with the lead car. In general, the higher the cognitive load involved in the dialogue, the worse the driving performance. 相似文献
32.
This study investigated the association between cerebrovascular risk factors (CVRFs), physical activity limitations, and depressed mood. The 12-item Short-Form Health Survey (SF-12) was administered to 1,034 urban African American older adults. A chi-square analysis demonstrated that the prevalence of depressed mood among those with high CVRF burden (13.4%) was significantly higher than among those with low vascular burden (7.6%). Physical activity limitations also predicted depressed mood, but this relationship did not mediate the relationship between cerebrovascular burden and depression. These findings highlight the relationships among cerebrovascular burden, physical activity limitations, and depressed mood among African American older adults. 相似文献
33.
Maydeu-Olivares and Joe (J. Am. Stat. Assoc. 100:1009–1020, 2005; Psychometrika 71:713–732, 2006) introduced classes of chi-square tests for (sparse) multidimensional multinomial data based on low-order marginal proportions.
Our extension provides general conditions under which quadratic forms in linear functions of cell residuals are asymptotically
chi-square. The new statistics need not be based on margins, and can be used for one-dimensional multinomials. We also provide
theory that explains why limited information statistics have good power, regardless of sparseness. We show how quadratic-form
statistics can be constructed that are more powerful than X
2 and yet, have approximate chi-square null distribution in finite samples with large models. Examples with models for truncated
count data and binary item response data are used to illustrate the theory. 相似文献
34.
This study examined demographic and denominational differences in religious involvement (i.e., organizational, non-organizational, subjective) among Caribbean Blacks (Black Caribbeans) residing in the U.S. using data from the National Survey of American Life. Caribbean Blacks who were born in the U.S. had lower levels of religious involvement than those who immigrated and respondents originating from Haiti (as compared to Jamaica) had higher levels of religious involvement, while persons from Trinidad-Tobago reported lower service attendance than did Jamaicans. Older persons, women and married persons generally demonstrated greater religious involvement than their counterparts, while highly educated respondents expressed lower levels of self-rated religiosity. Denominational differences indicated that Baptists reported high levels of religious involvement; however, in several cases, Pentecostals and Seventh Day Adventists reported greater involvement. 相似文献
35.
We discuss the female sexual response with a recognition of the distinction between sensuality and sexuality and an account of the development of femininity; present an account of the sexual response of women as a varied but describable experience; and consider the successes and problems female and male therapists have in empathic perception of a woman's account of her sexual experiences. 相似文献
36.
Joseph D. Lichtenberg M.D. 《Psychoanalytic Inquiry》2013,33(3):498-520
The ability to communicate, to share information about intentions, thoughts, and feelings with others and with one's self, is a unique and necessary capacity of humans. In this paper, I summarize a large body of research and observation that helps to explain the development of communication in infancy. Babies are “bathed” in the chatter of their mothers. This provides infants and toddlers entry into the symbolic realm when a full range of communication—preverbal, gestural, imagistic, and the syntactic and metaphoric use of language—is gradually developed and integrated. 相似文献
37.
A family of Root Mean Square Error of Approximation (RMSEA) statistics is proposed for assessing the goodness of approximation in discrete multivariate analysis with applications to item response theory (IRT) models. The family includes RMSEAs to assess the approximation up to any level of association of the discrete variables. Two members of this family are RMSEA2, which uses up to bivariate moments, and the full information RMSEAn. The RMSEA2 is estimated using the M2 statistic of Maydeu-Olivares and Joe (2005, 2006), whereas for maximum likelihood estimation, RMSEAn is estimated using Pearson's X2 statistic. Using IRT models, we provide cutoff criteria of adequate, good, and excellent fit using the RMSEA2. When the data are ordinal, we find a strong linear relationship between the RMSEA2 and the Standardized Root Mean Squared Residual goodness-of-fit index. We are unable to offer cutoff criteria for the RMSEAn as its population values decrease as the number of variables and categories increase. 相似文献
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40.
Benjamin T. Mast Susan E. MacNeill Peter A. Lichtenberg 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2013,20(1):21-37
The goal of the current study is to demonstrate a new methodology that can be used in neuropsychological research concerning differential diagnosis research. The multiple indicators, multiple causes (MIMIC) model is a latent variable methodology which can examine group differences on individual tests while controlling group differences in global cognitive impairment. As a demonstration, neuropsychological data from 217 dementia patients were incorporated into a MIMIC model to examine the influence of cerebrovascular disease (CVD) upon (1) dimensions of global cognitive impairment and (2) upon individual tests after controlling for global impairment. The presence of CVD in dementia (i.e., vascular dementia [VaD]) was not significantly related to dimensions of global impairment. In addition, the presence of CVD within dementia did not significantly contribute to impairment on 9 out of 10 neuropsychological tests/subscales examined after controlling global cognitive impairment. These results are discussed in the context of current vascular dementia research, and are focused primarily upon the MIMIC model methodology and suggestions for its use in future research. 相似文献