Conceptualizing culture in (global) mental health: Lessons from an urban American Indian behavioral health clinic.

The movement for global mental health (GMH) has brought perennial questions about human diversity in mental health to the fore through heightened debates over if and how established knowledge, institutions, and practices should be altered for ethical and effective interventions with diverse peoples around the world. Kirmayer and Pedersen (2014) encouraged dialogue between GMH scholars and communities considered for intervention to address differences and concerns about colonialism. American Indian mental health offers an instructive site for global mental health inquiry to understand frameworks that might facilitate this desired dialogue.

Localization of tones in a room by moving listeners.

It is difficult to localize the source of a tone in a room because standing waves lead to complicated interaural differences that become uninterpretable localization cues. This paper tests the conjecture that localization improves if the listener can move to explore the complicated sound field over space and time. Listener head and torso movements were free and uninstructed.

Substance Use Research with Indigenous Communities: Exploring and Extending Foundational Principles of Community Psychology.

Many Indigenous communities are concerned with substance use (SU) problems and eager to advance effective solutions for their prevention and treatment. Yet these communities also are concerned about the perpetuation of colonizing, disorder-focused, stigmatizing approaches to mental health, and social narratives related to SU problems. Foundational principles of community psychology-ecological perspectives, empowerment, sociocultural competence, community inclusion and partnership, and reflective practice-provide useful frameworks for informing ethical community-based research pertaining to SU problems conducted with and by Indigenous communities.

Matched transaural synthesis with probe microphones for psychoacoustical experiments.

Transaural synthesis using loudspeaker signals determined through contemporaneous ear canal calibration is proposed as an alternative to headphone presentation for critical psychoacoustical experiments. The proposed technique can afford greater accuracy, improved reproducibility, and continuous signal monitoring. It allows the experimenter to compare listener responses to real and virtual presentations.

Noise edge pitch and models of pitch perception.

Monaural noise edge pitch (NEP) is evoked by a broadband noise with a sharp falling edge in the power spectrum. The pitch is heard near the spectral edge frequency but shifted slightly into the frequency region of the noise. Thus, the pitch of a lowpass (LP) noise is matched by a pure tone typically 2%-5% below the edge, whereas the pitch of highpass (HP) noise is matched a comparable amount above the edge.

The impact of historical trauma on health outcomes for indigenous populations in the USA and Canada: A systematic review.

Beginning in the mid-1990s, the construct of historical trauma was introduced into the clinical and health science literatures to contextualize, describe, and explain disproportionately high rates of psychological distress and health disparities among Indigenous populations. As a conceptual precursor to racial trauma, Indigenous historical trauma (IHT) is distinguished by its emphasis on ancestral adversity that is intergenerationally transmitted in ways that compromise descendent well-being. In this systematic review of the health impacts of IHT, 32 empirical articles were identified that statistically analyzed the relationship between a measure of IHT and a health outcome for Indigenous samples from the United States and Canada.

American Indian historical trauma: Anticolonial prescriptions for healing, resilience, and survivance.

The American Indian historical trauma (HT) concept is an important precursor to racial trauma (RT) theory that reflects the distinct interests of sovereign Indigenous nations but shares much of the same promise and challenge. Here, that promise and challenge is explored by tracing HT's theoretical development in terms of its anticolonial ambitions and organizing ideas. Three predominant modes of engaging HT were distilled form the literature (HT as a clinical condition, life stressor, and critical discourse), each informing a research program pursuing a different anticolonial ambition (healing trauma, promoting resilience, practicing survivance) organized by distinct ideas about colonization, wellness, and Indigeneity.

A Return to "The Clinic" for Community Psychology: Lessons from a Clinical Ethnography in Urban American Indian Behavioral Health.

Community psychology (CP) abandoned the clinic and disengaged from movements for community mental health (CMH) to escape clinical convention and pursue growing aspirations as an independent field of context-oriented, community-engaged, and values-driven research and action. In doing so, however, CP positioned itself on the sidelines of influential contemporary movements that promote potentially harmful, reductionist biomedical narratives in mental health. We advocate for a return to the clinic-the seat of institutional power in mental health-using critical clinic-based inquiry to open sites for clinical-community dialogue that can instigate transformative change locally and nationally.

A framework for testing and comparing binaural models.

Auditory research has a rich history of combining experimental evidence with computational simulations of auditory processing in order to deepen our theoretical understanding of how sound is processed in the ears and in the brain. Despite significant progress in the amount of detail and breadth covered by auditory models, for many components of the auditory pathway there are still different model approaches that are often not equivalent but rather in conflict with each other. Similarly, some experimental studies yield conflicting results which has led to controversies.

A Two-Week Psychosocial Intervention Reduces Future Aggression and Incarceration in Clinically Aggressive Juvenile Offenders.

Objective: There is a largely unmet need for evidence-based interventions that reduce future aggression and incarceration in clinically aggressive juvenile offenders serving probation. We addressed this gap using a group randomized controlled trial. Offenders both with and without clinical aggression were included, enabling comparison of intervention effects.

On the localization of high-frequency, sinusoidally amplitude-modulated tones in free field.

Previous headphone experiments have shown that listeners can lateralize high-frequency sine-wave amplitude-modulated (SAM) tones based on interaural time differences in the envelope. However, when SAM tones are presented to listeners in free field or in a room, diffraction by the head or reflections from room surfaces alter the modulation percentages and change the shapes of the envelopes, potentially degrading the envelope cue. Amplitude modulation is transformed into mixed modulation.

Psychological-Mindedness and American Indian Historical Trauma: Interviews with Service Providers from a Great Plains Reservation.

The concept of historical trauma (HT) was developed to explain clinical distress among descendants of Jewish Holocaust survivors and has since been ascribed new meanings to account for suffering in diverse contexts. In American Indian (AI) communities, the concept of AI HT has been tailored and promoted as an expanded notion of trauma that combines psychological injury with historical oppression to causally connect experiences with Euro-American colonization to contemporary behavioral health disparities. However, rather than clinical formulations emphasizing psychological injury, a focused content analysis of interviews with 23 AI health and human service providers (SPs) on a Great Plains reservation demonstrated strong preferences for socio-cultural accounts of oppression.

Transaural experiments and a revised duplex theory for the localization of low-frequency tones.

The roles of interaural time difference (ITD) and interaural level difference (ILD) were studied in free-field source localization experiments for sine tones of low frequency (250-750 Hz). Experiments combined real-source trials with virtual trials created through transaural synthesis based on real-time ear canal measurements. Experiments showed the following: (1) The naturally occurring ILD is physically large enough to exert an influence on sound localization well below 1000 Hz.

Computing interaural differences through finite element modeling of idealized human heads.

Acoustical interaural differences were computed for a succession of idealized shapes approximating the human head-related anatomy: sphere, ellipsoid, and ellipsoid with neck and torso. Calculations were done as a function of frequency (100-2500 Hz) and for source azimuths from 10 to 90 degrees using finite element models. The computations were compared to free-field measurements made with a manikin.

Testing, correcting, and extending the Woodworth model for interaural time difference.

The Woodworth model and formula for interaural time difference is frequently used as a standard in physiological and psychoacoustical studies of binaural hearing for humans and other animals. It is a frequency-independent, ray-tracing model of a rigid spherical head that is expected to agree with the high-frequency limit of an exact diffraction model. The predictions by the Woodworth model for antipodal ears and for incident plane waves are here compared with the predictions of the exact model as a function of frequency to quantify the discrepancy when the frequency is not high.

American Indian historical trauma: community perspectives from two great plains medicine men.

The field of community psychology has long been interested in the relations between how community problems are defined, what interventions are developed in response, and to what degree power is distributed as a result. Tensions around these issues have come to the fore in debates over the influence of historical trauma (HT) in American Indian (AI) communities. After interviewing the two most influential medicine men on a Great Plains reservation to investigate how these tensions were being resolved, we found that both respondents were engaging with their own unique elaboration of HT theory.

The giant impact hypothesis: past, present (and future?).

At the request of editors, this paper offers a historical review of early work on the giant impact hypothesis, as well as comments on new data. The author hereby claims (whether believable or not) that his interest is to move towards a correct model of lunar origin, not to defend a possibly incorrect idea, just because of being a co-author of a relevant early paper. Nonetheless, the 1974 giant impact hypothesis appears still to be viable.

Advancing community-based research with urban American Indian populations: multidisciplinary perspectives.

The US has witnessed significant growth among urban American Indian (AI) populations in recent decades, and concerns have been raised that these populations face equal or greater degrees of disadvantage than their reservation counterparts. Surprisingly little urban AI research or community work has been documented in the literature, and even less has been written about the influences of urban settings on community-based work with these populations. Given the deep commitments of community psychology to empowering disadvantaged groups and understanding the impact of contextual factors on the lives of individuals and groups, community psychologists are well suited to fill these gaps in the literature.

Anatomical limits on interaural time differences: an ecological perspective.

Human listeners, and other animals too, use interaural time differences (ITD) to localize sounds. If the sounds are pure tones, a simple frequency factor relates the ITD to the interaural phase difference (IPD), for which there are known iso-IPD boundaries, 90°, 180°… defining regions of spatial perception. In this article, iso-IPD boundaries for humans are translated into azimuths using a spherical head model (SHM), and the calculations are checked by free-field measurements.

Temporal predictability as a grouping cue in the perception of auditory streams.

This study reports a role of temporal regularity on the perception of auditory streams. Listeners were presented with two-tone sequences in an A-B-A-B rhythm that was either regular or had a controlled amount of temporal jitter added independently to each of the B tones. Subjects were asked to report whether they perceived one or two streams.

Interaural time difference thresholds as a function of frequency.

Different models of the binaural system make different predictions for the just-detectable interaural time difference (ITD) for sine tones. To test these models, ITD thresholds were measured for human listeners focusing on high- and low-frequency regions. The measured thresholds exhibited a minimum between 700 and 1,000 Hz.

Human interaural time difference thresholds for sine tones: the high-frequency limit.

The smallest detectable interaural time difference (ITD) for sine tones was measured for four human listeners to determine the dependence on tone frequency. At low frequencies, 250-700 Hz, threshold ITDs were approximately inversely proportional to tone frequency. At mid-frequencies, 700-1000 Hz, threshold ITDs were smallest.

Incorporating traditional healing into an urban American Indian health organization: a case study of community member perspectives.

Facing severe mental health disparities rooted in a complex history of cultural oppression, members of many urban American Indian (AI) communities are reaching out for indigenous traditional healing to augment their use of standard Western mental health services. Because detailed descriptions of approaches for making traditional healing available for urban AI communities do not exist in the literature, this community-based project convened 4 focus groups consisting of 26 members of a midwestern urban AI community to better understand traditional healing practices of interest and how they might be integrated into the mental health and substance abuse treatment services in an Urban Indian Health Organization (UIHO). Qualitative content analysis of focus group transcripts revealed that ceremonial participation, traditional education, culture keepers, and community cohesion were thought to be key components of a successful traditional healing program.

Generating partially correlated noise--a comparison of methods.

There are three standard methods for generating two channels of partially correlated noise: the two-generator method, the three-generator method, and the symmetric-generator method. These methods allow an experimenter to specify a target cross correlation between the two channels, but actual generated noises show statistical variability around the target value. Numerical experiments were done to compare the variability for those methods as a function of the number of degrees of freedom.