The effects of varying fins in Müller-Lyer and Holding illusions

Summary Five experiments were conducted to determine how distortion of spatial position induced by unidirectional Müller-Lyer fins varied as a function of angle and length of fins. Research employing Cornsweet's staircase method yielded ambiguous results, but psychophysical methods of magnitude estimation, paired comparisons, and production showed conclusively that distortions of position are affected by angle and length of fins in a manner similar to that found in distortions of length. It was concluded that similar strategies are employed in processing attributes of length and position and that a theory based on averaging of attributes within an attentional field describes the performance of real observers.Experiments 1 and 2 were reported in a Master's thesis submitted by Nancy Smith to the University of Manitoba in 1987.     

Referenzsemantik in der Partnermodellierung

How can we explain that an assertion on something perceived can be understood in the same manner by somebody who cannot perceive that scene? This problem bases the interest in computational linguistics in how listener modeling could possibly be harmonized with reference semantics. Mental images substituting real perception appear as a way out. The architecture of the listener model has to be adapted to the creation and use of such pictorial data structures. Furthermore, the relation between the latter and a verbal (i. e., propositional) representation must be understood. The resulting architecture of a listener model with reference semantics can be employed to solve communicational problems from three general classes in a better way, as is demonstrated by an example implementation.     

Cognitive Biases and Political Party Affiliation in Intergroup Conflict

Employing the motivational basis of the false consensus bias, this study hypothesized that the degree of assumed similarity to in-group attitudes would differ among supporters of various political groups in intergroup conflict. We defined a conflict-maintaining bias, the adversary's extremity bias, and examined how the degree of the bias would also differ among supporters of various political groups. Data were gathered from Arab and Jewish high school and university students in Israel. Our hypotheses, that in intergroup conflict assumed similarity to in-group attitudes and the adversary's extremity bias would be greater among supporters of less conciliatory political parties than among supporters of more conciliatory political parties, were supported for one group in the conflict but not the other. Explanations of our findings are based on the differential power status of the 2 groups in the particular conflict.     

Coping Strategies as Predictors of Distress in Survivors of Single and Multiple Sexual Victimization and Nonvictimized Controls

This study investigated the relationship between coping strategies and distress symptomatology in survivors of sexual revictimization. Coping strategies were assessed with the revised Ways of Coping Scale (Aldwin & Revenson, 1987). Distress symptoms included global distress, depression, anxiety, and somatization. Subjects were 44 survivors of sexual victimization in both childhood and adulthood; 54 survivors of a single incident of sexual victimization in childhood; and 256 nonvictimized individuals. All were drawn from a subject pool of female undergraduate students. Multivariate analysis of variance revealed significant differences between groups on reported symptomatology and coping strategies. Victimized groups reported more distress than did the nonvictimized group. The multiple victimization group indicated greater use of coping strategies than did the nonvictimized group, and both victimized groups reported greater use of the escapism strategy than did the nonvictimized group. Multiple backward regression analysis found that coping strategies were predictive of distress symptomatology in all three groups, with escapism as the most potent predictor of distress for each group. Coping strategies were the most powerful predictors of distress in the multiply victimized group. The results of this study provide strong support for the importance of addressing coping strategies in clinical intervention of distress, particularly with survivors of multiple sexual victimization.     

Evaluating the Impact of a National AIDS Prevention Radio Campaign in St. Vincent and the Grenadines1

Based on extensive formative research in the three Eastern Caribbean countries of St. Lucia, St. Vincent and the Grenadines, and Grenada (Fishbein, Middlestadt, & Trafimow, 1993; Fishbein, Trafimow, et al., 1993), a three-nation, mass media, condom use campaign was developed. In order to assess the impact of the campaign, a follow-up survey was conducted in St. Vincent and the Grenadines. This paper examines the effectiveness of the campaign by comparing responses on this survey by respondents who were or were not exposed to the campaign. A statistically significant impact of exposure to the campaign was obtained, indicating that a well-designed, empirically based, mass media campaign can be an effective tool in the battle to prevent the spread of AIDS.     

Division of labor in conversations: Are Fishman's results replicable and generalizable?

Fishman's (1978a) conclusion that women do the bulk of the support work in their conversations with male partners has had widespread appeal. In this article, we present the results of two studies designed to assess the generalizability and replicability of her findings. In Study 1. the get-acquainted conversations of 20 mixed-sex, 10 male same-sex, and 10 female same-sex dyads were analyzed for the support strategies identified by Fishman. No support for a sexual division of labor was found. In Study 2, we analyzed the casual, at-home conversations of 17 intimate male-female couples. Again, we found no evidence that the women used more of the support strategies than their male partners. Rather, our findings suggest that the women may have helped to sustain the conversations with their male partners simply by talking more. The appeal of Fishman's conclusions in the absence of empirical evidence suggests that she has touched on a mythic truth.This article is based on a Master's thesis by the second author (Study 1) and an Honour's thesis by the third author (Study 2) under the supervision of the first author.     

Exposure-based models of human parsing: Evidence for the use of coarse-grained (nonlexical) statistical records

Several current models of human parsing maintain that initial structural decisions are influenced (or tuned) by the listener's or reader's prior contact with language. The precise workings of these models depend upon the grain, or level of detail, at which previous exposures to language are analyzed and used to influence parsing decisions. Some models are premised upon the use of fine-grained records (such as lexical cooccurrence statistics). Others use coarser measures. The present paper considers the viability of models based exclusively on the use of fine-grained lexical records. The results of several studies are reviewed and the evidence suggests that, if they are to account for the data, experience-based parsers must draw upon records or representations that capture statistical regularities beyond the lexical level. This poses problems for several parsing models in the literature.Aspects of this work were supported by ESRC grant No. R0023 4062 to Don Mitchell, by a Spanish Government grant DGICVT No. PB-92-0656-C04-02 to Fernando Cuetos, and by the Belgian National Fonds voor Wetenschappelijk Onderzoek, of which Marc Brysbaert is a Research Associate. We are grateful to Chuck Clifton, Barbara Hemforth, Martin Pickering, Matt Traxler, and an anonymous reviewer-all of whom made helpful comments on an earlier draft of the paper.