Velocity perception for sounds moving in frequency space

In three experiments, we considered the relative contribution of frequency change (Δf) and time change (Δt) to perceived velocity (Δf/Δt) for sounds that moved either continuously in frequency space (Experiment 1) or in discrete steps (Experiments 2 and 3). In all the experiments, participants estimated “how quickly stimuli changed in pitch” on a scale ranging from 0 (not changing at all) to 100 (changing very quickly). Objective frequency velocity was specified in terms of semitones per second (ST/s), with ascending and descending stimuli presented on each trial at one of seven velocities (2, 4, 6, 8, 10, 12, and 14 ST/s). Separate contributions of frequency change (Δf) and time change (Δt) to perceived velocity were assessed by holding total Δt constant and varying Δf or vice versa. For tone glides that moved continuously in frequency space, both Δf and Δt cues contributed approximately equally to perceived velocity. For tone sequences, in contrast, perceived velocity was based almost entirely on Δt, with surprisingly little contribution from Δf. Experiment 3 considered separate judgments about Δf and Δt in order to rule out the possibility that the results of Experiment 2 were due to the inability to judge frequency change in tone sequences.     

Pick Your Poison: Examining Adolescent Substance Use through Opportunity Theory

The present study examines substance use behaviors of middle and high school students, focusing on how varying influences of opportunity measures impact use of specific types of substances. The data used in the present study come from almost 4,000 students within 89 school contexts from students attending public school in a Southern state. Hierarchical logistic modeling is used to explore the influence of various opportunities at both the student and school levels on the use of different types of substances. Results indicate measures of opportunity at both the student and school levels were significant; however, measures at the individual level were consistently more influential.     

Spanish consumers' perceptions of US apparel speciality retailers' products and services

Apparel speciality retailers' success in international markets is contingent upon their knowledge of culturally‐defined values, norms and behaviour that influence consumer decision making and impact acceptance of products and services. An integrated theoretical framework of retail internationalisation guided this investigation of the viability of the Spanish market for US retailers. This study examined consumers' store patronage and apparel purchase behaviour, acceptance of US apparel brands, perceptions of retailers' products and services, and perceptions of the impact of foreign retailers on local communities. Data were collected from 375 consumers in Barcelona, Madrid and Valencia. The influence of retailer characteristics on consumers' store patronage varied by age and income. Product characteristics that influenced apparel purchases varied by gender, income and age, while acceptance of US brands differed by gender and age. The perceptions of Spanish, European and US retailers differed regarding quality, fashionability, product assortment, extent and quality of customer service, convenience of location, payment options, national brands and store layout. Consumers' acceptance of US apparel brands was a function of age, household income, apparel product country of manufacture and price. Perceptions of US retailers were a function of household income, selected apparel characteristics and consumer acceptance of US apparel brands. Differences among perceptions of the impact of retail development were found by city. The findings provide insights into the opportunities and challenges for US apparel speciality retailers as they contemplate entry into the Spanish market. The affinity for US apparel among young Spanish consumers, particularly males, suggests optimism regarding opportunities in this market. Copyright © 2005 John Wiley & Sons, Ltd.     

Risk-Reduction Surgery Decisions in High-Risk Women Seen for Genetic Counseling

Women at greatest risk for hereditary breast and ovarian cancer may consider prophylactic removal of breasts or ovaries as a risk-reduction measure. This report describes uptake of risk-reduction mastectomy (RRM), risk-reduction oophorectomy (RRO), and related factors in 62 high-risk women who received genetic counseling. Seven (11%) participants underwent RRM and 13 (21%) underwent RRO. Of these women, 37% did not have BRCA testing, suggesting other factors influence decisions to undergo surgery. Women who had indicated (pre-genetic counseling) their intent not to have surgery chose not to have surgery. Information received during genetic counseling that women perceived as being most important for influencing risk-reduction surgery decisions was BRCA test result (positive or negative), followed by discussion of family cancer history. Reasons for indecision about risk-reduction surgery included genetic testing results, concerns about surgery, timing in life, and early menopause. The findings enhance our understanding of information that is helpful to women considering this surgery.     

Song perception during the sensitive period of song learning in zebra finches (Taeniopygia guttata)

The sensitive period is a special time for auditory learning in songbirds. However, little is known about perception and discrimination of song during this period of development. The authors used a go/no-go operant task to compare discrimination of conspecific song from reversed song in juvenile and adult zebra finches (Taeniopygia guttata), and to test for possible developmental changes in perception of syllable structure and syllable syntax. In Experiment 1, there were no age or sex differences in the ability to learn the discrimination, and the birds discriminated the forward from reversed song primarily on the basis of local syllable structure. Similar results were found in Experiment 2 with juvenile birds reared in isolation from song. Experiment 3 found that juvenile zebra finches could discriminate songs on the basis of syllable order alone, although this discrimination was more difficult than one based on syllable structure. The results reveal well-developed song discrimination and song perception in juvenile zebra finches, even in birds with little experience with song.     

The relational self revealed: integrative conceptualization and implications for interpersonal life

The authors offer a new, integrative conceptualization of the relational self based on a synthesis of recent approaches to the self and significant others. This conceptualization provides a sharper and fuller definition of the relational self than does any existing approach alone and a common framework to interpret findings from separate literatures. The authors then present 5 propositions and evidence to support the thesis that relational selves exert a pervasive influence on interpersonal life. Specifically, relational selves (a) shape a wide range of psychological processes and outcomes, (b) exert their influence automatically, (c) serve basic orientation and meaning functions, (d) provide continuity and context-specific variability in personality, and (e) carry implications for psychological well-being. Discussion focuses on remaining issues and implications for future research.     

Women coping with AIDS in Africa: contributions of a contextually grounded research methodology

The primary objective of this report is to describe a contextually grounded approach to the investigation of coping and psychological functioning in AIDS-sick mothers. Five AIDS-sick women on antiretroviral therapy who had at least one child under 6 years of age living in their households were interviewed. Among the issues that emerged was the complexity of the women's psychological functioning, the fact that they made strategic decisions about disclosure aimed at protecting important social support networks, and that their well-being was dynamically influenced by factors in the home and community. The study provides evidence for the value of a contextual approach when investigating the psychological functioning of HIV positive mothers living in poor high-HIV prevalence communities in developing countries.     

THE EFFECTS OF POLITICAL VIOLENCE ON CHILDREN: A CONSIDERATION OF SOUTH AFRICAN AND RELATED STUDIES

This paper considers two propositions which have recently been advanced in debates in South Africa and elsewhere. The first is that children exposed to political violence will necessarily be emotionally damaged by the experience. The second is that exposed children will be socialised to endorse violence as a dominant mode of conflict resolution. Both these propositions are contested by referring to research conducted in South Africa and abroad. It is argued that attempts to understand the psychological sequellae of exposure to political violence need to take into account a number of interlinked factors. These include the type of political violence experienced, the child's developmental level and the availability of supports in the family and community. The evidence suggests that there is no simple relationship between exposure to violence and psychological disturbance or endorsement of violent conduct by children.     

Using Tablets to Collect Data From Young Children

Mobile, touch-screen devices are increasingly ubiquitous in children’s lives. The extensive use of such devices presents an exciting opportunity for data collection. We describe a simple method for creating cross-platform, interactive tablet experiments using open Web-based resources. We illustrate this method by collecting data from 1- to 4-year-old children in a word-recognition paradigm, using 3 different techniques: tablets, eye tracking, and an in-person storybook paradigm. Both accuracy and reaction-time data from the tablet compared favorably with the other methods. Tablets should be considered as a viable method for collecting low-cost, well-controlled developmental data.