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581.
Jeff Douglas 《Psychometrika》1997,62(1):7-28
The simultaneous and nonparametric estimation of latent abilities and item characteristic curves is considered. The asymptotic properties of ordinal ability estimation and kernel smoothed nonparametric item characteristic curve estimation are investigated under very general assumptions on the underlying item response theory model as both the test length and the sample size increase. A large deviation probability inequality is stated for ordinal ability estimation. The mean squared error of kernel smoothed item characteristic curve estimates is studied and a strong consistency result is obtained showing that the worst case error in the item characteristic curve estimates over all items and ability levels converges to zero with probability equal to one. 相似文献
582.
In two experiments, we used response signals (RSs) to control processing time and trace out speed--accuracy trade-off(SAT) functions in a difficult perceptual discrimination task. Each experiment compared performance in blocks of trials with constant and, hence, temporally predictable RS lags against performance in blocks with variable, unpredictable RS lags. In both experiments, essentially equivalent SAT functions were observed with constant and variable RS lags. We conclude that there is little effect of advance preparation for a given processing time, suggesting that the discrimination mechanisms underlying SAT functions are driven solely by bottom-up information processing in perceptual discrimination tasks. 相似文献
583.
In a visual simple reaction time paradigm with attention divided between the left and right visual fields, redundancy gain refers to the finding of faster responses to stimuli presented in both fields than to single stimuli. The present study investigated whether the effects of low-level perceptual processing affect the redundancy gain by comparing the detection of onsets versus offsets. In different blocks, participants responded to left and right visual field stimuli that either appeared (onset) or disappeared (offset), with a single stimulus change in some trials and two redundant stimulus changes in others. With onset stimuli, the results replicated previous redundancy gain effects. In contrast, there was much less redundancy gain when participants responded to stimulus offsets. This finding suggests that redundancy gain is sensitive to low-level perceptual characteristics, such as onset versus offset presentation of stimuli. 相似文献
584.
585.
The authors examined the association between psychopathy and identification of facial expressions of emotion. Previous research in this area is scant and has produced contradictory findings (Blair et. al., 2001, 2004; Glass & Newman, 2006; Kosson et al., 2002). One hundred and forty-five male jail inmates, rated using the Hare Psychopathy Checklist: Screening Version participated in a facial affect recognition task. Participants were shown faces containing one of five emotions (happiness, sadness, fear, anger, or shame) displayed at one of two different levels of intensity of expression (100% or 60%). The authors predicted that psychopathy would be associated with decreased affect recognition, particularly for sad and fearful emotional expressions, and decreased recognition of less intense displays of facial affect. Results were largely consistent with expectations in that psychopathy was negatively correlated with overall facial recognition of affect, sad facial affect, and recognition of less intense displays of affect. An unexpected negative correlation with recognition of happy facial affect was also found. These results suggest that psychopathy may be associated with a general deficit in affect recognition. 相似文献
586.
Anderson RB Doherty ME Friedrich JC 《Journal of experimental psychology. Learning, memory, and cognition》2008,34(4):929-944
In 4 studies, the authors examined the hypothesis that the structure of the informational environment makes small samples more informative than large ones for drawing inferences about population correlations. The specific purpose of the studies was to test predictions arising from the signal detection simulations of R. B. Anderson, M. E. Doherty, N. D. Berg, and J. C. Friedrich (2005). The results of a simulation study in the present article confirmed and extended previous theoretical claims (R. B. Anderson et al., 2005) that in a yes/no correlation detection task, small-sample advantages should occur but should be restricted to particular decision conditions. In 3 behavioral studies, participants viewed larger or smaller samples of data pairs and judged whether each sample had been drawn from a population characterized by a zero correlation or from one characterized by a greater-than-zero correlation. Consistent with traditional statistical theory, accuracy tended to be greater for larger than for smaller samples, though there was a small-sample advantage in 1 experimental condition. The results are discussed in relation to alternative theoretical and behavioral paradigms such as those of Y. Kareev (e.g., 2005) and K. Fiedler and Y. Kareev (2006). 相似文献
587.
Heath A. Grames Richard B. Miller W. David Robinson Derrel J. Higgins W. Jeff Hinton 《Contemporary Family Therapy》2008,30(4):183-198
Few studies have examined the theoretical underpinning of contextual theory. Using structural equation modeling, the relationship
among relational ethics (recognized as the most important aspect of contextual theory), marital satisfaction, depression,
and illness was examined. Data came from a national sample of 632 mid-life, married individuals. Results supported Nagy’s
contextual theory. The total score of the Relational Ethics Scale was a significant predictor of marital satisfaction, and
marital satisfaction was significantly associated with depression and health problems. Vertical and horizontal subscales of
relational ethics also were significant predictors of depression and health problems through the mediating variable of marital
satisfaction. 相似文献
588.
A man with multiple disabilities using a head‐turning response to reduce the effects of his drooling
Giulio E. Lancioni Nirbhay N. Singh Mark F. O'Reilly Jeff Sigafoos Doretta Oliva Francesca Campodonico Jop Groeneweg 《Behavioral Interventions》2008,23(4):285-290
A man with multiple disabilities was taught to perform a head‐turning response to activate optic sensors embedded in a small spongy structure at his shoulder and produce preferred stimuli. By touching the spongy structure with chin and mouth (i.e., to activate the sensors), the man would clean these areas thus curbing the effects of his drooling. Data showed that the man increased the frequency of his head‐turning responses and reduced drooling effects (chin wetness) through the intervention and a 3‐month follow‐up. Forty university students, who were involved in a social validation assessment, indicated that the intervention was suitable and enjoyable to the man, had a social/educational function, and represented an approach that they supported. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
589.
Andy Martens Jeff Greenberg John J B Allen 《Personality and social psychology review》2008,12(4):370-389
In this article a potential physiological connection to self-esteem is suggested: cardiac vagal tone, the degree of influence on the heart by the vagus, a primary nerve of the parasympathetic nervous system. This hypothesis emerges from parallels between the two literatures that suggest both self-esteem and cardiac vagal tone function to provide protection from threat responding. This article reviews these literatures and evidence and preliminary findings that suggest in some contexts self-esteem and cardiac vagal tone may exert an influence on each other. Last, the article discusses theoretical and applied health implications of this potential physiological connection to self-esteem. 相似文献
590.