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291.
We consider latent variable models for an infinite sequence (or universe) of manifest (observable) variables that may be discrete, continuous or some combination of these. The main theorem is a general characterization by empirical conditions of when it is possible to construct latent variable models that satisfy unidimensionality, monotonicity, conditional independence, andtail-measurability. Tail-measurability means that the latent variable can be estimated consistently from the sequence of manifest variables even though an arbitrary finite subsequence has been removed. The characterizing,necessary and sufficient, conditions that the manifest variables must satisfy for these models are conditional association and vanishing conditional dependence (as one conditions upon successively more other manifest variables). Our main theorem considerably generalizes and sharpens earlier results of Ellis and van den Wollenberg (1993), Holland and Rosenbaum (1986), and Junker (1993). It is also related to the work of Stout (1990).The main theorem is preceded by many results for latent variable modelsin general—not necessarily unidimensional and monotone. They pertain to the uniqueness of latent variables and are connected with the conditional independence theorem of Suppes and Zanotti (1981). We discuss new definitions of the concepts of true-score and subpopulation, which generalize these notions from the stochastic subject, random sampling, and domain sampling formulations of latent variable models (e.g., Holland, 1990; Lord & Novick, 1968). These definitions do not require the a priori specification of a latent variable model.The authors made equivalent contributions to the results of this article. Ellis' research was supported by the Dutch Interuniversitary Graduate School of Psychometrics and Sociometrics. Junker's research was supported by ONR Grant N00014-87-K-0277, NIMH Grant MH15758, and a Carnegie Mellon University Faculty Development Grant. In addition Junker would like to acknowledge the hospitality of the Nijmegen Institute for Cognition and Information during his visit to the University of Nijmegen in August 5–10, 1993. 相似文献
292.
293.
Thirteen master pigeons were exposed to multiple schedules in which reinforcement frequency (Experiment I) or duration (Experiment II) was varied. In Phases 1 and 3 of Experiment I, the values of the first and second components' random-interval schedules were 33 and 99 seconds, respectively. In Phase 2, these values were 99 seconds for both components. In Experiment II, a random-interval 33-second schedule was associated with each component. During Phases 1 and 3, the first and second components had hopper durations of 7.5 and 2.5 seconds respectively. During Phase 2, both components' hopper durations were 2.5 seconds. In each experiment, positive contrast obtained for about half the master subjects. The rest showed a rate increase in both components (positive induction). Each master subject's key colors and reinforcers were synchronously presented on a response-independent basis to a yoked control. Richer component key-pecking occurred during each experiment's Phases 1 and 3 among half these subjects. However, none responded during the contrast condition (unchanged component of each experiment's Phase 2). From this it is inferred that autoshaping did not contribute to the contrast and induction findings among master birds. Little evidence of local contrast (highest rate at beginning of richer component) was found in any subject. These data show that (a) contrast can occur independently from autoshaping, (b) contrast assays during equal-valued components may produce induction, (c) local contrast in multiple schedules often does not occur, and (d) differential hopper durations can produce autoshaping and contrast. 相似文献
294.
内隐和外显记忆测验的信度比较研究及思考 总被引:1,自引:0,他引:1
任务分离的实验范式以功能分离和随机独立性等证据说明不同记忆任务的底层系统或加工机制。近期研究发现,两种记忆测量重测信度、复本信度和分半信度差异显著,内隐测验的信度更低一些,因而对变量效果缺乏足够的敏感性。两种测验信度差异对任务分离提出了区别于系统说或加工观点的另外解释。以后在研究外显和内隐记忆分离的时候应该慎重考虑测验信度的检验问题,还应通过各种方法来提高内隐记忆测验的信度,使两种记忆测验的信度具有可比性。 相似文献
295.
Abstract: This study explored object processing associated with attention level dependent on task, using a paradigm of negative priming. Participants were required to identify target characters that appeared at either the global or local level in hierarchically structured patterns. Two experiments were conducted to examine how the global and local characters were processed in the attended and unattended levels. In the results of Experiment 1, where stimuli were presented for 10 ms, negative priming was observed in a local‐directed task, but not in a global‐directed one. These results suggested that the inhibition of local characters in the unattended level did not occur during global attention. The results of Experiment 2 revealed that negative priming was observed in both global‐ and local‐directed tasks in the 500 ms presentation, showing that inhibition in the unattended level occurred. As a result, the exposure duration influences inhibition in the unattended, especially the local level. At short exposure duration, the local characters are not inhibited when one directs attention to the global characters, whereas these are inhibited at long exposure duration. 相似文献
296.
Changes in dichotomous data caused by treatments can be analyzed by means of the so-called linear logistic model with relaxed
assumptions (LLRA). The LLRA does not require observable criteria representing a single underlying latent trait, but it postulates
the generalizability of the treatment effects over criteria and subjects. To test this latter crucial assumption, the mixture
LLRA was proposed that allows directly unobservable types of subjects to have different treatment effects. As the earlier
methods for estimating the parameters of the mixture LLRA have specific drawbacks, a further method based on the conditional
maximum likelihood principle will be presented here. In contrast to the earlier conditional methods, it uses all of the dichotomous
change data while having fewer parameters. Further, its goodness-of-fit tests become more sensitive to a falsely specified
number of change-types even though the treatment effects are biased. For typically occurring small to moderate sample sizes,
however, parametric bootstrapping of the distributions of the fit statistics is recommended for performing hypotheses tests.
Finally, three applications of the new method to empirical data are described: first, about the effect of the so-called Trager
psychophysical integration, second, about the effect of autogenic therapy on patients with psychosomatic symptoms, and, third,
about the effect of religious education on the attitude towards sects.
The mixture LLRA is implemented in the menu-driven program MIXLLRA which can be obtained from Ivo Ponocny via e-mail (ivo.ponocny@univie.ac.at). 相似文献
297.
Manfusa Shams 《Asian Journal of Social Psychology》2005,8(1):39-50
The present paper endeavours to discuss some of the potential issues inherent in the developmental work for indigenous psychologies, especially in the Western context. The discussion is made around two topical issues, sustainability and local knowledge. The developmental processes in indigenous psychologies are influenced by the inter- and intracommunity environment. It is important to trace the development of local knowledge in a sustained community environment. The cross-fertilization of ecological perspectives with indigenous psychological knowledge can enlighten our understandings of global issues in psychology as well as the applications of psychological knowledge to a local context. A theoretical model is proposed to highlight major social psychological processes in a participatory community environment − the model is expected to address essential contentious issues to the future of a globalized psychology, especially the way integrated local knowledge can lay the foundations of a globalized indigenous psychology. 相似文献
298.
ALPHABETICALLY NADIA BRUSCHWEILER‐STERN ALEXANDRA M. HARRISON KARLEN LYONS‐RUTH ALEXANDER C. MORGAN JEREMY P. NAHUM LOUIS W. SANDER DANIEL N. STERN EDWARD Z. TRONICK 《The International journal of psycho-analysis》2002,83(5):1051-1062
This paper proposes a method of examining the micro-events of the analytic process that borrows heavily from developmental research. The increasing importance of illuminating the microprocess of interaction to understanding the process of change in analytic treatment is emphasised. A set of constructs and terminology is proposed for the study of the moment-to-moment interactive process in psychoanalytic therapy referred to as the local level. A theory of therapeutic action based on 'local-level' process is then explicated. Its central element involves a step-by-step process of 'fitting together', which leads to changes in implicit knowing through alteration of emotional procedures. 相似文献
299.
研究对203名脑卒中患者的家庭照料者进行了问卷调查,以探讨患者的功能独立性对家庭照料者负担感的作用机制。结果显示,82.3%脑卒中患者的家庭照料者有明显的负担感;患者的功能独立性与家庭照料者的负担感显著负相关;来自患者的社会支持在患者功能独立性与家庭照料者负担感之间起中介作用,而来自患者之外的社会支持则起调节作用。结果表明,在家庭照料负担的干预实践中,应注意区分来源不同的社会支持及其作用机制。 相似文献
300.
This study sought to examine the effects of training mands on the emergence of tacts with the same response forms. Results indicated that training adjective sets as mands resulted in the emergence of adjective sets as tacts under modified, but not standard, antecedent conditions. The findings suggested that the apparent functional independence of mands and tacts may be explained by a lack of appropriate antecedent control over responding. 相似文献