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991.
Four measurement designs are presented for use with correlation coefficients corrected, in one variable, for attenuation due to unreliability—coefficients that we term partially disattenuated correlation coefficients. Asymptotic expressions are derived for the variances and covariances of the estimates accompanying each design. Empirical simulation results that bear on the preceding mathematical developments are then presented. In addition to providing insights into the distributions of the estimates, the empirical results demonstrate satisfactory Type I error control for typical inferential applications. Power is shown to be equal to or greater than that of corresponding product-moment correlations in three of the four designs. Implications for practice are discussed.Support for the research reported in this article was provided by the Natural Sciences and Engineering Research Council of Canada. The authors acknowledge with thanks the contributions of Nancy E. Heckman to some of the theoretical aspects of the study. 相似文献
992.
Three experiments are reported in which conditioned lick suppression by water-deprived rats was used as an index of associative strength. In Experiment 1, overshadowing of a light by a tone was observed when the light-tone compound stimulus was paired with foot shock. After initial compound pairings, the tone-shock association was extinguished in one group of subjects. Subsequently, these animals demonstrated significantly higher levels of suppression to the light relative to a control group in which the tone had not been extinguished. Experiment 2 replicated this effect while failing to find evidence to support the possibilities that extinction presentations of the overshadowing tone act as retrieval cues for the light-shock association, or that, via second-order conditioning, the light-shock association is actually formed during extinction of the tone. Experiment 3 determined that the recovery from overshadowing observed in Experiments 1 and 2 was specific to the extinction of the overshadowing stimulus rather than the extinction of any excitatory cue. Collectively, these results suggest that the debilitated response to an overshadowed stimulus does not represent an acquisition failure, but rather the failure of an acquired association to be manifest in behavior. 相似文献
993.
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995.
The interdependence of knowledge and strategic behavior is becoming increasingly well established. The purpose of this research was to determine whether young children could use spatial categorization--a cognitive skill well within the repertoire of even 2-year-olds--as a mnemonic strategy. The results of three studies revealed that young children are capable of spatially organizing objects as a strategy in the service of future retrieval. There were clear developmental trends in the strategic deployment of categorization. Although there was some evidence of the mnemonic use of perceptually defined categories by 2- and 3-year-olds, these children rarely executed the strategy effectively. Four-year-old children were quite successful at exploiting perceptually defined categories to aid retrieval. By five years of age, children were able, in addition, to actively construct physical categories based on an internal representation and use them in the service of memory. 相似文献
996.
997.
This article applies formal modeling to study a terrorist group's choice of whether to attack or not, and, in the case of an attack, which of two potential targets to strike. Each potential target individually takes protective measures that influence the terrorists' perceived success and failure, and, hence, the likelihood of attack. For domestic terrorism, a tendency for potential targets to overdeter is indicated. For transnational terrorism, cases of overdeterrence and underdeterrence are identified. We demonstrate that increased information about terrorists' preferences, acquired by the targets, may exacerbate inefficiency when deterrence efforts are not coordinated. In some cases, perfect information may eliminate the existence of a noncooperative solution.Yet the need for improved international cooperation is growing. Terrorism is inherently international in character, so that, paradoxically, the more individual states improve their national measures, the more it becomes attractive for the terrorists to cross frontiers ... (Wilkinson 1986, p. 49) 相似文献
998.
Carvajal Howard McVey Susan Sellers Todd Weyand Kimberley McKnab Paul 《The Psychological record》1987,37(1):127-130
This study investigated the correlations among the “General Purpose Abbreviated Battery” of the Stanford-Binet IV: Fourth Edition, the Peabody Picture Vocabulary Test-Revised, the Columbia Mental Maturity Scale, and the Goodenough-Harris Drawing Test. A third-grade class of 23 children (11 boys, 12 girls) took all four of the tests, and the intercorrelations of the total scores of the four tests were calculated. The Binet IV and Peabody correlation was statistically significant (p < .01) as was the correlation between Binet IV and Columbia (p < .05). The correlation between Binet IV and Goodenough-Harris was not statistically significant (p > .05).
相似文献999.
Todd and Greenberg use a co-supervisory model with predoctoral psychology family therapy interns, but with Todd using a structural/strategic model and Greenberg a symbolic-experiential model. They focus on the isomorph of cotherapist trainees replaying family problems and the traineers replaying trainee problems. Their model involves using the trainee's creative confusion/tension to help each of them to integrate individually appropriate configurations as their training continues over a year.The authors wish to acknowledge the editorial comments and helpful advice of Carl A. Whitaker, MD, and Milton L. Greenberg, MFT, in the development of this paper from earlier drafts. They would also like to acknowledge significant contributions from Drs. Glenn Bronley, Paul Coleman, Chad Glang, Beverly Keith, Tracy Lewis, Charles Lock-wood, Wesley Matsui, Rita McKenzie, Timothy Weber, Ms. Holly DeVore, Lee Ann Lockwood, and Misty Weber. Christopher Weber made a special contribution as the program's first child therapist. 相似文献
1000.
Paul F. Spangler Todd R. Risley Donald D. Bilyew 《Journal of applied behavior analysis》1984,17(3):397-401
We evaluated a health care routine designed to decrease incontinence and improve the hydration level of nonambulatory nursing home patients. To implement this routine, a 3′ × 4′ cart was equipped with liquids and toileting equipment. A nurse's aid was assigned the task of taking the cart to each nonambulatory resident in a nursing home and offering specified assistance on a regular basis. Data demonstrated a decrease in physical dehydration, as well as in fecal and urinary incontinence. 相似文献