Signal-detection analysis of luminance generalization in goldfish using latency as a graded response measure

ROC curves were determined from response latencies of goldfish in a single-stimulus generalization task. The resulting functions were similar to ROC curves obtained by rating methods with human Os.     

The two-flash threshold: An evaluation of critical-duration and visual-persistence hypotheses

The two-flash threshold is reduced by increasing the duration of both pulses of light or light adapting the eye. Increasing the duration of the first pulse also decreases the two-flash threshold, contrary to what a critical-duration explanation of the threshold would predict. Decreasing the duration of the second pulse increases the threshold when the second pulse is very brief. Light adapting the eye under such conditions serves to increase the two-flash threshold, unlike the effect adaptation has when a long second pulse is used.     

‘It’s silly these doors don’t open’: a six-year-old girl emerges from a chronic state of emotional withdrawal

This clinical paper explores the way in which the first two years of a long-term psychotherapy helped six-year-old Anna to lessen her retreat into a chronic withdrawn emotional state. Over the course of the first year she would occasionally pick up the fridge from the doll’s house and try to open the doors, but because the fridge was actually a block of wood the doors could not open. In treatment, this inquiry came to represent the difficulties of engaging and making contact with a baby who found it very hard to feed. The author describes how, as Anna entered into a therapeutic relationship, it slowly became clear that there was an inner world jam-packed with persecutory anxieties and a family history of unmourned loss and trauma. Through fear Anna slammed the doors to her mind – to knowing herself – and by not feeding, Anna starved herself of opportunities for mental growth. It took some time for her to state, “it’s silly these doors don’t open, they should”. In the discussion of this clinical material the author draws on the work of Francis Tustin, Alessandra Piontelli and Marguerite Reid to consider the link between intergenerational and prenatal trauma and subsequent emotional disturbance in the child.     

Treatment Populations,Services, and Outcomes for Cocaine and Crack-Cocaine Dependence

This paper analyzes demographic and other pretreatment characteristics, measures of treatment services received, and treatment outcomes of participantsin the National Treatment Improvement Evaluation Study (NTIES), a large-scale longitudinal study of substance abuse treatment (D. R. Gerstein et al., 1997; R. A. Johnson & D. R. Gerstein, 2000). The focus here is those treated primarily for cocaine powder or crack-cocaine dependence, compared with those in treatment for other substances, particularly heroin. Crack-dependent users tend to be female and black, older than primary marijuana or alcohol users but younger than those in treatment for heroin. Primary cocaine powder or crack users are likely to have entered treatment under pressure from the criminal justice system. After treatment there are substantial reductions in use of cocaine powder and crack, especially among participants with fewer prior treatment episodes and lower pretreatment intensity of use. Longer duration and intensity of treatment result in greater reductions in cocaine and crack use.     

Clients' perspectives on problems many years after traumatic brain injury

This study investigated the types of self-reported main problems that persons report many years following a traumatic brain injury. This preliminary study is part of a large ongoing study of disability and handicap in adults following traumatic brain injury. As part of an extensive interview, subjects were asked an open-ended question regarding their current main problems which they thought resulted from their traumatic brain injury. Responses were obtained from 166 adult subjects (119 men and 47 women) whose time postinjury ranged from 9 to 24 years. Categories for responses were subsequently developed. The most commonly reported categories of problems were those relating to movement (39%), cognition (36%), and sensory impairment (31%). Findings suggest that subjects' long-term concerns were related to specific impairments more than to psychosocial, emotional, or behavioral issues. Methodological issues concerning this research are discussed in relation to findings.