Top-down gain control in the auditory system: evidence from identification and discrimination experiments

The influence of intensity range in auditory identification and intensity discrimination experiments is well documented and is usually attributed to nonsensory factors. Recent studies, however, have suggested that the stimulus range effect might be sensory in origin. To test this notion, in one set of experiments, we had listeners identify the individual tones in a set. One baseline condition consisted of identifying four 1-kHz, low-intensity tones; the other consisted of identifying four 1-kHz, high-intensity tones. In the experimental conditions, these baseline tone sets were augmented by adding a fifth tone at either 1 or 5 kHz. Added 5-kHz tones had little effect on identification accuracy for the four baseline tones. When an added 1-kHz tone differed substantially in intensity from the four baseline tones, it adversely affected performance, with the addition of a high-intensity tone to a set of low-intensity tones having a more deleterious effect than the addition of a low-intensity tone to a set of high-intensity tones. These and further results, obtained in an exploration of this asymmetrical range effect in a third identification experiment and in two intensity-discrimination experiments, were consistent with the notion of a nonlinear amplifier under top-down control whose functions include protection against sensory overload from loud sounds. The identification data were well described by a signal-detection model using equal-variance Laplace distributions instead of the usual Gaussian distributions.     

Visual search for dimensionally redundant pop-out targets: parallel-coactive processing of dimensions is location specific

Three visual search experiments investigated redundancy gains for single and dual odd-one-out feature targets that differed from distractors in orientation, color, or both. In Experiment 1, redundant-target displays contained (a) a single target defined in 2 dimensions, (b) dual targets each defined in a different dimension, or (c) dual targets both defined in the same dimension. The redundancy gains, relative to single nonredundant targets, decreased from the first condition on, with violations of J. Miller's (1982) race model inequality (RMI) manifested only in the first 2 conditions. Experiment 2 systematically varied the spatial separation between dual targets each defined in a different dimension. Violations of the RMI were evident only when the 2 targets occupied nearby locations. Experiment 3 provided evidence of RMI violations by dimensionally redundant targets at both precued (likely) and noncued (unlikely) display locations. Taken together, these results suggest that there is coactivation of a common mechanism by target signals in different dimensions (not by signals in the same dimension), that the coactivation effects are spatially specific, and that the coactivated mechanisms are located at a preattentive, perceptual stage of processing.     

Mental health services for African Americans: a cultural/racial perspective

African Americans have made consistent progress toward first-class citizenship since 1965. Nonetheless, mental health services for this population have been biased, incomplete, and deficient because similarities to European Americans have been emphasized whereas differences were largely ignored. This article addresses some differences, including cultural/racial identity and the cultural self, that affect assessment, psychiatric diagnoses, and psychotherapy or other interventions. An assessment-intervention model illustrates how cultural information can inform service delivery and improve services to African Americans. Cultural/racial perspectives on mental health in a multicultural society suggest innovations in the design of these services and access to them that can increase utilization by African Americans.     

Obsessive-Compulsive Disorder in the Media

Scholars have long been concerned that mass media depictions of those with mental disorders foster stigma. Research is needed extricating how particular disorders are represented and perceived, such as obsessive-compulsive disorder (OCD). This article examines what images of obsessions and compulsions exist in the media, and how persons interpret these. It employs two methods: qualitative in-depth interviews and content analysis. Data indicate the media represents obsessions and compulsions in distinguishable ways that both reinforce and complicate common media stereotypes of those with mental disorders—fostering a stigma hierarchy and having contradictory effects on mental health literacy.     

The Kawa River Model: Applying Theory to Develop Interventions for Combat and Operational Stress Control

This article proposes the implementation of the occupational therapy Kawa (Japanese for river) model to promote “culturally relevant” client-centered care for combat and operational stress control services provided in the military context. Currently, the occupational therapy literature lacks a culturally sensitive approach to address the military service members’ experiences with combat and operational stress. A review of the Kawa model features are provided within a case study for a military service member affected by combat and operational stress. This theoretical article offers a pragmatic method for infusing occupational therapy theory to address the cultural aspects of military service members in recovery.     

Context-Dependent Emotion Regulation: Suppression and Reappraisal at the Burning Man Festival

Two studies investigated the combined effects of cultural practices, ancestry, and phenotype on ethnic categorization and the distribution of resources to minorities. Perceivers formed impressions of Latino internship candidates who varied in Spanish language fluency, White/European ancestry, and skin color. Spanish fluency influenced the distribution of minority resources to all targets, but only influenced the Latino categorization of targets who had White/European ancestry. The effect of Spanish fluency on minority resource distribution was explained by the White/European target's Latino categorization and perceived commitment to minority communities. We discuss why factors beyond racial/ethnic categorization may matter in minority resource distribution decisions.     

The capacity to symbolise: Ideas and implications

Through a literature review and clinical examples of session material and dreams, this paper explores aspects of the origin and development of the capacity to symbolise. The literature review considers Freud’s thinking on symbols in dreams, hysteria and obsessional neurosis, Klein’s discovery of the importance of unconscious phantasy, Bion’s ideas on the psychotic part of the mind and Bick’s seminal ideas on skin as an important symbolic boundary between psyche and soma. The clinical material in this paper is used to demonstrate the capacity to symbolise, reasons for the impairment of this capacity, and how the translation of symbols through interpretation in a therapeutic setting can enable the symbols to acquire meaning. It includes examples both of the author’s work with adults and of other clinicians’ work with a child and an adolescent in a psychotic state of mind. The paper’s aim is to consolidate the idea that the capacity to symbolise grows out of an optimal early parent/child relationship and that the awareness of the significance of the symbols when they have been interpreted is of crucial importance.     

Talking about Twisters: Relations between Mothers' and Children's Contributions to Conversations about a Devastating Tornado

Mother-child dyads who experienced a devastating tornado talked about the storm and about two affectively more positive or neutral events at each of two time points: 4 months and 10 months after the storm. The conversations were analyzed to determine whether mothers and/or children's contributions differed as a function of event type and whether there were concurrent and/or cross-lagged relations between mothers and children's contributions to the conversations. For both members of the dyads, contributions were similar (and correlated) across event types. Maternal narrative style related to children's levels of participation and to the amount of unique information the children contributed to the conversations, both concurrently and over time; cross-lagged relations were more robust for the tornado relative to the nontornado related events. The implications of the patterns for socialization models of autobiographical memory development are discussed.