Effects of luminance contrast on color spreading and illusory contour in the neon color spreading effect

The present study examined whether color spreading and illusory contours in the neon color spreading effect of Ehrenstein figures are governed by different mechanisms. In the experiment, Ehrenstein figures with colored crosses inserted in the central gaps were used. There were three luminance conditions: the luminance of the Ehrenstein figures was lower than, the same as, or higher than the luminance of the background. In each condition, 16 trials (2 sets of instructions X 8 repetitions) were conducted in a random order. Subjects were required to adjust the luminance of the colored crosses according to one of the two sets of instruction given before each trial. One was to adjust the upper and lower thresholds in the luminance of the colored crosses such that their color was seen to spread out of the crosses. The other was to adjust the thresholds such that circular illusory contours were visible. It was found that illusory contours disappeared and the color spreading remained when the crosses and the Ehrenstein figures were in or nearly in isoluminance or when the Ehrenstein figures and the background were in isoluminance. These results suggest that color spreading and illusory contours are governed by different mechanisms.     

Parallel Processing Response Times and Experimental Determination of the Stopping Rule

It was formerly demonstrated that virtually all reasonable exhaustive serial models, and a more constrained set of exhaustive parallel models, cannot predict critical effects associated with self-terminating models. The present investigation greatly generalizes the parallel class of models covered by similar "impossibility" theorems. Specifically, we prove that if an exhaustive parallel model is not super capacity, and if targets are processed at least as fast as non-targets, then it cannot predict such (self-terminating) effects. Such effects are ubiquitous in the experimental literature, offering strong confirmation for self-terminating processing. Copyright 1997 Academic Press. Copyright 1997 Academic Press     

Scales,diagnoses, and child psychopathology: II. Comparing the CBCL and the DISC against external validators

Using a multimethod multistage screening procedure, the authors interviewed 201 parents and their children with the Diagnostic Interview Schedule for Children (DISC 2.1). In addition, parents completed the Child Behavior Checklist (CBCL) and other survey measures, while their children completed self-report scales. Receiver operating characteristic (ROC) analyses were done to determine optimal cutpoints on the CBCL, referenced to DISC diagnostic caseness. DISC diagnoses, DISC stem symptoms, CBCL scores, and CBCL ROC-cutpoints were compared against external validators, in order to determine the comparative advantages of each approach for assessing child psychopathology. Overall findings suggest that the controversies about best assessment strategies may be artificial: When both assessment approaches are compared using similar methods, they are reasonably comparable. However, highly specific diagnostic categories may show fewer relationships with external validators and may therefore need more systematic validational studies.The opinions and assertions contained in this paper are the private views of the authors and are not to be construed as official or as reflecting the views of the Department of Health and Human Services, the National Institute of Mental Health, the Walter Reed Army Institute of Research, or the Department of the Army.     

The type A behavior pattern and immune reactivity to brief stress: change of volume of secretory immunoglobulin A in saliva

This article presents findings of a laboratory experiment on the association of the Type A behavior pattern with reactivity of secretory immune functioning to brief stress. 38 female undergraduate students classified as Type A (n = 19) or as Type B (n = 19) on the basis of their scores on the Kwansei Gakuin Type A scale performed a continuous arithmetic task in a situation in which they were exposed to aversive loud noise. Secretory immunoglobulin A (s-IgA) in saliva and autonomic measures (heart rate and frequency of eyeblink) were evaluated before and after the manipulation of stress. The volume of s-IgA at baseline was significantly higher for the Type A group than for the Type B group, suggesting that the former relative to the latter might be chronically higher in mucosal immune functioning. Also, the volume of s-IgA significantly increased after exposure to a brief stress for the Type B group but did not change for the Type A group, a finding which might indicate that the Type A group may have less immune reactivity to a brief stress.     

Texture and motion spreading,the aperture problem,and transparency

When a cross of either static or moving texture is inserted in the intersection of an Ehrenstein figure, we find that the texture and its motion appear to spread outside of the cross. We suggest that these phenomena are analogous to neon color spreading, wherein an interpretation of a transparent surface makes the properties of that surface, which are physically visible only inside the cross, appear to spread over its apparent extent. In our experiments, the texture and the motion of the cross are attributed to the transparent surface. In addition, the spreading changes the apparent aperture within which the texture and its motion are seen, leading to a corresponding change in the apparent direction of motion.     

The Mediating Effects of Benefit Finding on the Relationship Between the Identity Centrality of Negative Stressful Events and Identity Achievement

Which types of benefit finding in negative events central to identity lead to higher identity achievement? This study examined the relationships between the identity centrality of negative events, benefit finding, and identity achievement, with consideration of differences between benefit-finding domains. Participants included 245 undergraduates, who recalled a previous negative event and completed the Identity Scale, Centrality of Event Scale, and items regarding benefit finding. Path analysis showed that benefit finding regarding personal growth consistently correlated with identity achievement, while the effects of recognizing warmth in others were unstable depending on event category. The findings demonstrated the role of benefit finding regarding personal growth in promoting identity achievement and buffering the original adverse impact of negative events on identity.     

Planning over the day span: memory for the content of plans

The purpose of this study was to clarify the effect of the time of day on memory for the content of plans, and to examine the influence of knowledge of daily activities on it. Twenty‐four undergraduates participated as subjects in the experiment. Participants were told to memorize 24 plans of one day (e.g. ‘13:00’, ‘making a telephone call’), and were then asked to recall them in the test phase. Furthermore, we tried to explore their knowledge of everyday activities using a questionnaire. The result showed that plans of night, morning, and evening were recalled better than that of afternoon. This result was explained by the notion that knowledge of one's personal daily activities might affect memory of plans. Copyright © 2002 John Wiley & Sons, Ltd.     

Discrimination of moving video images of self by pigeons (<Emphasis Type="Italic">Columba livia</Emphasis>)

The ability to recognize self has been known to be limited to some animal species, but previous research has focused almost exclusively on the animal's reaction to a mirror. Recent studies suggest that the temporal contingency between a subject's action and the corresponding visual scene reflected in a mirror plays an important role in self-recognition. To assess the roles of visual-proprioceptive contiguity in self-recognition, we explored whether pigeons are able to discriminate videos of themselves with various temporal properties. We trained five pigeons to respond to live video images of themselves (live self-movies) and not to video filmed during previous training sessions (pre-recorded self-movies). Pigeons learned to peck trial-unique live self-movies more frequently than pre-recorded self-movies. We conducted two generalization tests after pigeons learned to discriminate between the two conditions. First, discrimination acquired during training sessions was transferred to a test session involving live self-movies and new pre-recorded self-movies. Second, the same pigeons were tested in extinction procedure using delayed live self-movies and new pre-recorded self-movies. Although pigeons responded to delayed presentations of live self-movies more frequently than to new pre-recorded self-movies, the relative response rate to delayed presentation of live self-movies gradually decreased as the temporal discrepancy between pigeons' own behavior and the corresponding video increased. These results indicate that pigeons' discrimination of self-movies with various temporal properties was based on the temporal contiguity between their behavior and its visual feedback. The methodology used in the present experiment is an important step toward improving the experimental analysis of self-recognition in non-human animals.     

Application of the behavioral investigative support system for profiling perpetrators of serial sexual assaults

The authors developed a data-based profiling system in order to support offender profiling. The system stored incident records of prior offenders. Inputting offence details of an unsolved incident, a probability score was assigned to each prior offender in the system; the score represented the behavioral similarity with the unsolved incident. The system then ranked all offenders in the system according to the probability scores, and prioritized the high-ranked offenders as possible suspects. Moreover, the system inferred the characteristics of unknown offenders by accumulating characteristics of the high-ranked offenders. The system achieved promising accuracy, especially for linking crimes to perpetrators. In 45 out of 81 simulation trials, the target offenders were retrieved as a rank score of 1 from among 868 sex offenders.     

Somatic and social: Chinese Americans talk about emotion

Empirical findings suggest that Chinese and Americans differ in the ways that they describe emotional experience, with Chinese using more somatic and social words than Americans. No one, however, has investigated whether this variation is related to differences between Chinese and American conceptions of emotion or to linguistic differences between the English and Chinese languages. Therefore, in two studies, the authors compared the word use of individuals who varied in their orientation to Chinese and American cultures (European Americans [EA], more acculturated Chinese Americans [CA], and less acculturated CA) when they were speaking English during emotional events. Across both studies, less acculturated CA used more somatic (e.g., dizzy) and more social (e.g., friend) words than EA. These findings suggest that even when controlling for language spoken, cultural conceptions of emotion may shape how people talk about emotion.