A clarification of self-terminating versus exhaustive variances in serial and parallel models

A recent study published in Perception & Psychophysics (Donnelly, Found, & Miller, 1999) employs response time (RT) variances (in the form of standard deviations) in addition to mean RTs. Variances can contribute greatly to model testing. However, there is a danger of perpetuating the kinds of logical and methodological errors that have long attended research employing mean RTs alone. This commentary clarifies the theoretical and methodological issues, points out some new results concerning variability in search processes, and indicates how to resolve the global and specific challenges associated with identifying psychological mechanisms.     

Being mixed: who claims a biracial identity?

What factors determine whether mixed-race individuals claim a biracial identity or a monoracial identity? Two studies examine how two status-related factors-race and social class-influence identity choice. While a majority of mixed-race participants identified as biracial in both studies, those who were members of groups with higher status in American society were more likely than those who were members of groups with lower status to claim a biracial identity. Specifically, (a) Asian/White individuals were more likely than Black/White or Latino/White individuals to identify as biracial and (b) mixed-race people from middle-class backgrounds were more likely than those from working-class backgrounds to identify as biracial. These results suggest that claiming a biracial identity is a choice that is more available to those with higher status.     

An accuracy-response time capacity assessment function that measures performance against standard parallel predictions

Measures of human efficiency under increases in mental workload or attentional limitations are vital in studying human perception, cognition, and action. Assays of efficiency as workload changes have typically been confined to either reaction times (RTs) or accuracy alone. Within the realm of RTs, a nonparametric measure called the workload capacity coefficient has been employed in many studies (Townsend & Nozawa, 1995). However, the contribution of correct versus incorrect responses has been unavailable in that context. A nonparametric statistic that is capable of simultaneously taking into account accuracy as well as RTs would be highly useful. This theoretical study develops such a tool for two important decisional stopping rules. Preliminary data from a simple visual identification study illustrate one potential application.     

An Extension of SIC Predictions to the Wiener Coactive Model

The survivor interaction contrasts (SIC) is a powerful measure for distinguishing among candidate models of human information processing. One class of models to which SIC analysis can apply are the coactive, or channel summation, models of human information processing. In general, parametric forms of coactive models assume that responses are made based on the first passage time across a fixed threshold of a sum of stochastic processes. Previous work has shown that the SIC for a coactive model based on the sum of Poisson processes has a distinctive down-up-down form, with an early negative region that is smaller than the later positive region. In this note, we demonstrate that a coactive process based on the sum of two Wiener processes has the same SIC form.     

Sikh millennials of the ‘kirtan generation’ in the making of an ‘American Sikhism’

ABSTRACT

This essay focuses on the millennial generation of Sikhs in the United States. Based on extended ethnographic research in Sikh communities, the author explores the role of Sikh millennials in the making of an ‘American Sikhism’, the contours of which are taking shape having followed after the explosive growth of gurdwara communities – and the educational, social, and other resources they provide – which were largely made possible by the affluence of Sikh communities beginning with the previous ‘Brain Drain’ generation. In particular, the author discusses this ‘kirtan generation’ of Sikhs, educated in gurdwara schools, and their growing leadership of Sikh communities.     

The relation between Rorschach signs of Aggression and behavioral Aggression in Emotionally Disturbed Boys

Ratings of aggressive behavior were related to Rorschach signs of aggression for sixty-three boys at a residential treatment school for children. The total list of 26 Rorschach signs was significantly correlated with the ratings, but much of this relationship was contributed by only a few individual signs. Indices of aggressive impulses, such as aggressive content, were not significant, while the more structural indices, considered as measures of impulse control, (presence of CF and absence of human movement responses), were significantly related to the behavior ratings. Presence or absence of human responses alone differentiated between low aggression and high aggression groups about as well as did a combination of indices.     

Aspectual Coercion in Eye Movements

Comprehension includes interpreting sentences in terms of aspectual categories such as processes (Harry climbed) and culminations (Harry reached the top). Adding a verbal modifier such as for many years to a culmination coerces its interpretation from one to many culminations. Previous studies have found that coercion increases lexical decision and meaning judgment time, but not eye fixation time. This study recorded eye movements as participants read sentences in which a coercive adverb increased the interpretation of multiple events. Adverbs appeared at the end of a clause and line; the post-adverb region appeared at the beginning of the next line; follow-up questions occasionally asked about aspectual meaning; and clause type varied systematically. Coercive adverbs increased eye fixation time in the post-adverb region and in the adverb and post-adverb regions combined. Factors that influence the appearance of aspectual coercion may include world knowledge, follow-up questions, and the location and ambiguity of adverbs.     

Aristotle and Personal Selling

Abstract

The authors discuss the relevance of Aristotle's writings, particularly in the Rhetoric, to modern-day personal selling. Aristotle endorses a sophisticated approach to selling—advocating a customer orientation and segmented markets. He proposes a three-pronged selling process that includes appeals to reason and the emotions of the purchaser while concurrently convincing the purchaser of the seller's integrity. Aristotle argues that the art of selling is subject to systematic formal treatment and demonstrates the possibilities of formal analysis in persuasion. He further assimilates logical argument with practical persuasion in a way that provides a sound basis for selling strategy.     

A Qualitative Exploration of Rural African American Youth Perceptions about the Effect of Dating Violence on Sexual Health

Adolescent dating violence (ADV) remains a significant concern, particularly among rural African Americans. Few studies have explored adolescents’ perceptions about the link between ADV and sexual health and none have targeted this population. Employing qualitative methods based in Community-Based Participatory Research and theory, this study explored rural African American adolescents’ knowledge, perceptions and beliefs about the impact of ADV on sexual health. Secondary data analysis of 20 semi-structured individual interviews, conducted with older adolescents (aged 18–21), revealed participants understood the link between ADV and sexual health consequences, specifically as it related to STI and HIV prevention, condom use, and refusal of sex; and the negative impact refusing sex, communicating about HIV and other STI prevention, and negotiating condom use can have on ADV. This included: (a) negative relationship outcomes, including ADV and fear; and (b) factors that impact one’s ability to refuse sex, communicate about HIV and STI prevention, and negotiate condom use. Findings underscore the need for comprehensive ADV prevention programs for rural African Americans.