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Visualizing spatial material is a cornerstone of human problem solving, but human visualization capacity is sharply limited. To investigate the sources of this limit, we developed a new task to measure visualization accuracy for verbally-described spatial paths (similar to street directions), and implemented a computational process model to perform it. In this model, developed within the Adaptive Control of Thought-Rational (ACT-R) architecture, visualization capacity is limited by three mechanisms. Two of these (associative interference and decay) are longstanding characteristics of ACT-R’s declarative memory. A third (spatial interference) is a new mechanism motivated by spatial proximity effects in our data. We tested the model in two experiments, one with parameter-value fitting, and a replication without further fitting. Correspondence between model and data was close in both experiments, suggesting that the model may be useful for understanding why visualizing new, complex spatial material is so difficult. 相似文献
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Stacy L. Frazier Marc S. Atkins Laura Hess Olson Aaron R. Lyon 《Journal of psychopathology and behavioral assessment》2009,31(3):152-158
The present study proposed to understand how same-sex and other-sex peer nominations relate differently to teacher reports
of children’s behaviors and measures of children’s friendships. Students provided peer nominations, mutual friend data, and
social network data. Teachers rated students’ antisocial behavior and social competence. As expected, other-sex peer social
preference scores predicted teacher ratings of antisocial behavior, while same-sex peer social preference scores predicted
data on friendships and social groups. Unexpectedly, both same and other sex peer nominations predicted children’s teacher-rated
social competence. Findings suggest that other-sex peers offer a unique perspective on children’s social behavior that is
neither superfluous nor unimportant to understanding children’s psychosocial adjustment. 相似文献
15.
Subjects discriminate letters in words better than letters in nonwords. The sophisticated guessing hypothesis attributes this word advantage to a guessing strategy. In words, the possible letters at each letter position are constrained by letters at other positions, whereas letters in nonwords are not restricted in this manner. A critical test of this hypothesis is that if subjects are givenexplicit knowledge of the letters in nonwords before the trial, the word advantage would disappear. We investigated the effect of preknowledge of the alternatives in the word-detection effect. In the word-detection effect, subjects decide which of two character strings contains letters and which contains pseudoletters. In four experiments, subjects were more accurate with words than with nonwords, and subjects were more accurate when they were told the word or nonword before the trial. However, even with foreknowledge of the alternatives, subjects were more accurate with words than with nonwords. 相似文献
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This study examined differences in K-ABC performance between at-risk (n = 44) and normal (n = 49) preschool children. For the group at-risk, all of the mean global scores on the K-ABC clustered around a standard score of approximately 90. The normal group's mean scores were 15 to 21 standard-score points higher and clustered near 110. The results of t tests for independent samples indicated that the normal group's scores on both the global scales and K-ABC subtests were significantly higher than the at-risk group's scores in nearly every instance. Correlations among scores were consistent with previous findings for preschoolers on the K-ABC. For the normal group, correlations obtained among the global scales were nearly identical to those reported for the standardization sample. For the at-risk group, however, the correlation of .75 between Sequential processing and Achievement was higher than that (.58) between Simultaneous processing and Achievement. 相似文献
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The threat of separation from a parent theoretically increases the risk of adolescent suicide attempts. The present study evaluated this and other hypothesized risk factors in a sample of adolescent suicide attempters and nonsuicidal controls, using the Psychiatric Consultation Checklist (Lyon, 1987). Stepwise logistic regression was used to predict group membership. It was found that threat of separation from a parental figure, insomnia, neglect, substance abuse, suicidal ideation, and failing grades were the strongest predictors of suicide attempt. Ten predictor variables correctly identified 97% of suicide attempters and 86% of nonattempters. Unexpected findings included high levels of truancy, threatening others, and separation from a parent before the age of 12 among nonattempters. 相似文献
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Steinberg PI Rosie JS Joyce AS O'Kelly JG Piper WE Lyon D Bahrey F Duggal S 《International journal of group psychotherapy》2004,54(4):521-538
This paper describes the Psychodynamic Psychiatry Service (PPS) of the University of Alberta Hospital over its 30 years of development. This psychiatric organization consists of three clinical programs-an outpatient clinic and intensive day and evening programs-and an integral evaluation and research unit. The PPS is unique in its group therapy clinical orientation, its psychodynamic theoretical orientation, and its integration of an ongoing research program that establishes empirical validation of its clinical work. The productivity and longevity of this psychiatric organization appear to derive from several strengths, including cooperation between leaders of the clinical and research programs; the institution of staff relations groups in the three clinical programs; the operation of the fully integrated evaluation and research program that serves to provide empirical support for the treatments offered; and a unifying ideology characterized by the valuing of both psychodynamic and group oriented work. Other important factors to the success of the PPS include the strengths of the founder of the service and financial and other support of the academic department in which it is housed. This paper describes the historical development and present structure and functioning of the PPS, the challenges it has been confronted with, and the responses to those challenges. We conclude with factors contributing to its survival and productivity and with thoughts about the future. 相似文献
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Thomas D. Lyon Shanna Williams Stacia N. Stolzenberg 《Behavioral sciences & the law》2020,38(6):630-647
The New Jersey Supreme Court held in New Jersey v. J.L.G. (2018) that experts can no longer explain to juries why sexually abused children might deny abuse. The court was influenced by expert testimony that “methodologically superior” studies find lower rates of denial. Examining the studies in detail, we argue that the expert testimony was flawed due to three problems with using child disclosure studies to estimate the likelihood that abused children are reluctant to disclose abuse: the ground truth problem, disclosure suspicion bias, and disclosure substantiation bias. Research identifying groups of children whose abuse can be proven without reliance on disclosure reveals that denial of sexual abuse is common among abused children. 相似文献
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Elizabeth C. Ahern Stacia N. Stolzenberg Thomas D. Lyon 《Behavioral sciences & the law》2015,33(4):476-492
This study examined the quality of interview instructions and rapport-building provided by prosecutors to 168 children aged 5–12 years testifying in child sexual abuse cases, preceding explicit questions about abuse allegations. Prosecutors failed to effectively administer key interview instructions, build rapport, or rely on open-ended narrative producing prompts during this early stage of questioning. Moreover, prosecutors often directed children's attention to the defendant early in the testimony. The productivity of different types of wh- questions varied, with what/how questions focusing on actions being particularly productive. The lack of instructions, poor quality rapport-building, and closed-ended questioning suggest that children may not be adequately prepared during trial to provide lengthy and reliable reports to their full ability. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献