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.     

Enhancing Interpersonal Psychotherapy for Mothers and Expectant Mothers on Low Incomes: Adaptations and Additions

Intervening with depressed women during their childbearing years, especially with those on low incomes, is critically important. Not only do mothers and expectant mothers suffer unnecessarily, but their untreated depression has critical negative consequences for their families. Despite this, these women have proven especially difficult to engage in psychotherapy. In this paper we describe several adaptations and additions we have made to a brief form of Interpersonal Psychotherapy (IPT) to meet the needs of mothers and expectant mothers living on low incomes in the community who suffer from depression, but face significant practical, psychological, and cultural barriers to engaging in and staying in treatment. In addition, we present some preliminary data on the extent to which our enhanced, brief IPT approach promotes improvements in treatment engagement and retention relative to usual care for expectant mothers on low incomes.     

Multiresolution Analysis of Event-Related Potentials by Wavelet Decomposition

Wavelet analysis is presented as a new tool for analyzing event-related potentials (ERPs). The wavelet transform expands ERPs into a time-scale representation, which allows the analyst to zoom in on the small scale, fine structure details of an ERP or zoom out to examine the large scale, global waveshape. The timescale representation is closely related to the more familiar time-frequency representation used in spectrograms of time-varying signals. However, time-scale representations have special properties that make them attractive for many ERP applications. In particular, time-scale representations permit theoretically unlimited time resolution for the detection of short-lived peaks and permit a flexible choice of wavelet basis functions for analyzing different types of ERPs. Generally, time-scale representations offer a formal basis for designing new, specialized filters for various ERP applications. Among recently explored applications of wavelet analysis to ERPs are (a) the precise identification of the time of occurrence of overlapping peaks in the auditory brainstem evoked response; (b) the extraction of single-trial ERPs from background EEG noise; (c) the decomposition of averaged ERP waveforms into orthogonal detail functions that isolate the waveforms experimental behavior in distinct, orthogonal frequency bands; and (d) the use of wavelet transform coefficients to concisely extract important information from ERPs that predicts human signal detection performance. In this tutorial we present an intuitive introduction to wavelets and the wavelet transform, concentrating on the multiresolution approach to wavelet analysis of ERP data. We then illustrate this approach with real data. Finally,we offer some speculations on future applications of wavelet analysis to ERP data.     

Building capacity or enforcing normalcy? Engaging with disability scholarship in Africa

In contemporary South African academia, “community engagement” is a valued commodity. My work as a nondisabled white man with disability activists and as editor of the African Journal of Disability is viewed as good for my career, and as an appropriate form of engagement and empowerment. In this article, I engage critically with the question of the extent to which capacity building is simply about increasing capacity. I ask whether capacity building inevitably involves elements of disavowal of the experience and competencies of less powerful people. I compare capacity building to the enforcement of normalcy, a process which disability scholars criticize with justification. I ask whether it is possible in unequal social contexts to engage with the politics of voice without imposing a hegemonic narrative on nondominant voices. I suggest links between the politics of engaged scholarship and processes of domestication of troubling bodies and minds.     

Quarterly commentary

The Psychological Record -     

Imbalances in the knowledge about infancy: The divide between rich and poor countries

Over 90% of the world's infants are born in low‐income or “developing” countries, and these countries bear a disproportionate burden in terms of health and social problems. In this article we compare the contributions of richer and poorer countries to knowledge about infancy. We surveyed articles on infancy from 12 international journals dealing with psychological aspects of childhood and infancy and found that 94% of articles surveyed were written from Europe or North America. We suggest that the imbalance in knowledge about infancy is serious and that efforts must be made to increase collaborative research between poor and rich countries. ©2003 Michigan Association for Infant Mental Health.