Siegel is correct that, in its current form, the specific constructs underlying the Demands and Capacities Model cannot be adequately defined. However, substituting observable behavior (performance) for presumed underlying weaknesses in the speech production systems of those who stutter (capacity) does not appear to solve the problem of circularity identified. Rather, demands have not been adequately defined, either.
There is much to agree with in Siegel's note. However, it is not clear to me that the Demands and Capacities Model is salvaged by substituting the term “Performance” for “Capacity.” Rather, the problem with the Model is one of defining terms precisely enough so that the Model is not circular (as Ingham & Cordes (1997) have noted), or the logical inverse of Procruste's bed, as I have stated elsewhere (Bernstein Ratner, 1997), a model that fits all interpretations simply because it stretches to fit all possibilities. 相似文献
Religious socialization occurs within the immediate family as well as in the broader social context. Previous research has shown that parents’ religiosity matters less for the transmission of religious beliefs in devout than in secular nations, implying smaller costs of religious socialization. In this article we test which other societal factors affect the transmission of religious beliefs: anti‐religious policies in formerly socialist countries, economic development, and income inequality. Our results indicate that societies with high levels of income inequality seem to provide the most favorable context for religious socialization. Individuals develop strong religious beliefs even if they only received little religious socialization within the family. Formerly socialist nations increased socialization costs through the overall suppression of religious practice. Economic development has no impact on socialization effects, suggesting that inequality is a more important driver of religious change than previously thought. 相似文献
There has recently been much interest in computerized adaptive testing (CAT) for cognitive diagnosis. While there exist various item selection criteria and different asymptotically optimal designs, these are mostly constructed based on the asymptotic theory assuming the test length goes to infinity. In practice, with limited test lengths, the desired asymptotic optimality may not always apply, and there are few studies in the literature concerning the optimal design of finite items. Related questions, such as how many items we need in order to be able to identify the attribute pattern of an examinee and what types of initial items provide the optimal classification results, are still open. This paper aims to answer these questions by providing non‐asymptotic theory of the optimal selection of initial items in cognitive diagnostic CAT. In particular, for the optimal design, we provide necessary and sufficient conditions for the Q ‐matrix structure of the initial items. The theoretical development is suitable for a general family of cognitive diagnostic models. The results not only provide a guideline for the design of optimal item selection procedures, but also may be applied to guide item bank construction. 相似文献
Although many studies have examined performance improvements of ballistic movement through practice, it is still unclear how performance advances while maintaining maximum velocity, and how the accompanying triphasic electromyographic (EMG) activity is modified. The present study focused on the changes in triphasic EMG activity, i.e., the first agonist burst (AG1), the second agonist burst (AG2), and the antagonist burst (ANT), that accompanied decreases in movement time and error. Twelve healthy volunteers performed 100 ballistic wrist flexion movements in ten 10-trial sessions under the instruction to "maintain maximum velocity throughout the experiment and to stop the limb at the target as fast and accurately as possible". Kinematic parameters (position and velocity) and triphasic EMG activities from the agonist (flexor carpi radialis) and antagonist (extensor carpi radialis) muscles were recorded. Comparison of the results obtained from the first and the last 10 trials, revealed that movement time, movement error, and variability of amplitudes reduced with practice, and that maximum velocity and time to maximum velocity remained constant. EMG activities showed that AG1 and AG2 durations were reduced, whereas ANT duration did not change. Additionally, ANT and AG2 latencies were reduced. Integrated EMG of AG1 was significantly reduced as well. Analysis of the alpha angle (an index of the rate of recruitment of the motoneurons) showed that there was no change in either AG1 or AG2. Correlation analysis of alpha angles between these two bursts further revealed that the close relationship of AG1 and AG2 was kept constant through practice. These findings led to the conclusion that performance improvement in ballistic movement is mainly due to the temporal modulations of agonist and antagonist muscle activities when maximum velocity is kept constant. Presumably, a specific strategy is consistently applied during practice. 相似文献
Divorce has been conceptualized as a process. Research has extensively demonstrated that it is pre/postdivorce family environment factors that primarily account for the variability in children’s adaptation over parental divorce process rather than the legal divorce per se. Amongst various factors, interparental conflict has been consistently identified as a prominent one. Surprisingly, a single source is still lacking that comprehensively synthesizes the extant findings. This review fills this gap by integrating the numerous findings across studies into a more coherent Divorce Process and Child Adaptation Trajectory Typology (DPCATT) Model to illustrate that pre/postdivorce interparental conflict plays crucial roles in shaping child adaptation trajectories across parental divorce process. This review also summarizes the mechanisms (e.g., child cognitive and emotional processes, coparenting, parent–child relations) via which pre/postdivorce interparental conflict determines these trajectories and the factors (e.g., child gender and age, child coping, grandparental support) that interact with pre/postdivorce interparental conflict to further complicate these trajectories. In addition, echoing the call of moving beyond the monolithic conceptualization of pre/postdivorce interparental conflict, we also review studies on the differential implications of different aspects (e.g., frequency versus intensity) and types (e.g., overt versus covert) of interparental conflict for child adjustment. Last, limitations of prior studies and avenues for future research are discussed. The proposed framework may serve as a common knowledge base for researchers to compare/interpret results, detect cutting edges of the fields, and design new studies. The specificity, complexity, nuance, and diversity inherent within our proposed model await to be more fully revealed.
Social Psychology of Education - Job exhaustion is not uncommon among Chinese middle school teachers, but the key antecedents of job exhaustion and the underlying mechanisms in this historically... 相似文献