Keeping things in perspective

Scientific realism holds that scientific representations are utterly objective. They describe the way the world is, independent of any point of view. In Scientific Representation, van Fraassen argues otherwise. If science is to afford an understanding of nature, it must be grounded in evidence. Since evidence is perspectival, science cannot vindicate its claims using only utterly objective representations. For science to do its epistemic job, it must involve perspectival representations. I explicate this argument and show its power.     

Predictors of multitasking performance in a synthetic work paradigm

This study investigated determinants of success in a ‘synthetic work’ task designed to reflect the requirement for multitasking that is common to many occupations. Participants were administered tests of working memory capacity (WMC) and processing speed (PS), and they reported experience with videogames, a type of activity presumed to involve multitasking. Results revealed that WMC was a strong predictor of multitasking in a ‘non‐emergency’ condition when the pace of the tasks was relatively slow, whereas PS was a weaker predictor. Additionally, there was evidence for the incremental validity of videogame experience (VGE), consistent with the possibility that multitasking is supported by a general, trainable skill. Finally, individual differences in strategy use accounted for a large proportion of the variance in multitasking, above and beyond other predictor variables, and WMC predicted use of an effective strategy. Copyright © 2009 John Wiley & Sons, Ltd.     

Analysis of ordinal categorical data with misclassification

We develop a method for the analysis of multivariate ordinal categorical data with misclassification based on the latent normal variable approach. Misclassification arises if a subject has been classified into a category that does not truly reflect its actual state, and can occur with one or more variables. A basic framework is developed to enable the analysis of two types of data. The first corresponds to a single sample that is obtained from a fallible design that may lead to misclassified data. The other corresponds to data that is obtained by double sampling. Double sampling data consists of two parts: a sample that is obtained by classifying subjects using the fallible design only and a sample that is obtained by classifying subjects using both fallible and true designs, which is assumed to have no misclassification. A unified expectation–maximization approach is developed to find the maximum likelihood estimate of model parameters. Simulation studies and examples that are based on real data are used to demonstrate the applicability and practicability of the proposed methods.     

Attitudinal Balance and Cause‐Related Marketing: An Empirical Application of Balance Theory

We examine the effects of pre‐existing organizational attitudes on consumer response to cause‐related marketing (CRM) alliances, using a Balance Theory framework. Two experiments demonstrate that balanced attitudes (either both positive or both negative) resulted in perceptions of appropriateness, but did not necessarily lead to positive affect. The positive balance scenario led to a synergistic attitudinal boost when both pre‐existing attitudes were positive. Attitudinal contamination was evident when either pre‐existing attitude was negative. Fit operated within the balance scenario to enhance perceptions of the strength of the CRM alliance, leading to more positive responses.     

Effects of a personified guide on adherence to an online program for alcohol abusers.

The quality of the therapeutic alliance has robust effects on the outcome of psychotherapy and psychopharmacologic interventions. Automated behavioral health programs that are being developed to increase access to mental health treatment are administered in the absence of direct human participation, thereby precluding the development of a traditional therapeutic relationship. The aim of this study was to develop a personified guide designed to stimulate reactions similar to those experienced in a therapeutic relationship, and evaluate the effect of the guide on adherence to and satisfaction with an online alcohol use evaluation program. After completing a battery of four standard questionnaires used to evaluate problem drinking, 288 subjects were randomized to receive feedback on their results in text form or via a multimedia condition involving a personified guide. Those who received feedback via the guide demonstrated greater levels of program adherence by completing more modules. Reported satisfactions levels did not differ between the two conditions. Encouraging the personification of an automated behavioral health intervention may lead to greater levels of engagement with the program.     

What Proportion of Adult Hispanics Are Catholic? A Review of Survey Data and Methodology

The proportion of Hispanics who are Catholic remains unclear, partly because of varying survey methods and limited understanding of how these variations affect estimates of Hispanic religious identification. We compare 12 national surveys conducted since 1990. Language use strongly predicts religious identification among Hispanics—more strongly than other indicators of assimilation—and evidence suggests English-only interviewing inflates Protestant identification. Additionally, identifying Hispanics through ancestry questions may inflate Catholic identification. We also explore effects of sampling bias, noncoverage bias, and weighting on religious identification. Analyses suggest that poststratification weighting is advisable, particularly for language use. However, weighting cannot fully substitute for extensive coverage of subpopulations such as recent immigrants and Spanish-only speakers. We conclude that 70 percent or slightly more is a reasonable estimate of the proportion of adult Hispanics who are Catholic, and 20 percent a reasonable estimate of the proportion who are Protestant or other Christian.     

先前知识对初中学生学习家族相似性类别的影响研究

采用特征—主题的类别学习范式,考察了先前知识对初中学生学习具有家族相似性结构人工类别的影响。结果表明:基于先前知识的主题关系对初中学生的类别学习有显著促进;初中学生在基于已有知识的类别学习中更多地获得了知识关联特征的信息,同时也能对机械特征保持敏感。     

A comparison of auditory and visual apparent motion presented individually and with crossmodal moving distractors

Unimodal auditory and visual apparent motion (AM) and bimodal audiovisual AM were investigated to determine the effects of crossmodal integration on motion perception and direction-of-motion discrimination in each modality. To determine the optimal stimulus onset asynchrony (SOA) ranges for motion perception and direction discrimination, we initially measured unimodal visual and auditory AMs using one of four durations (50, 100, 200, or 400 ms) and ten SOAs (40-450 ms). In the bimodal conditions, auditory and visual AM were measured in the presence of temporally synchronous, spatially displaced distractors that were either congruent (moving in the same direction) or conflicting (moving in the opposite direction) with respect to target motion. Participants reported whether continuous motion was perceived and its direction. With unimodal auditory and visual AM, motion perception was affected differently by stimulus duration and SOA in the two modalities, while the opposite was observed for direction of motion. In the bimodal audiovisual AM condition, discriminating the direction of motion was affected only in the case of an auditory target. The perceived direction of auditory but not visual AM was reduced to chance levels when the crossmodal distractor direction was conflicting. Conversely, motion perception was unaffected by the distractor direction and, in some cases, the mere presence of a distractor facilitated movement perception.     

Assimilation and ethnic boundaries: Israeli students' altitudes toward soviet immigrants

The attitudes of Israeli students toward new immigrants from the former Soviet Union were examined against the theoretical framework of the sociology of ethnicity and sociology of education. The main research question explored was which ethnic relationship model (assimilation, pluralism, or separation) best described the attitudes and self-reported behavior of Israeli youth toward the new immigrants. Israeli students' changing attitudes toward their immigrant counterparts were also investigated, as well as actual Israeli educational practices (not only declared policies) regarding Soviet immigrants. The study was conducted in grades 4-11 at schools in northern Israel. The results indicated positive attitudes and openness of relations by the Israelis toward the new immigrant students in the first year following their immigration. However, the attitudes were less positive in the second year. Although the Israeli students manifested positive attitudes toward immigration and to the immigrants themselves, these views were largely assimilatory; Israeli cultural capital was obviously dominant, and it was expected to be accepted as such by the newcomers. The findings point to Israeli assimilatory educational practice; immigrants are expected to blend in, abandoning their past heritage and culture.