'No-show': therapist racial/ethnic disparities in client unilateral termination

In the present study, the authors examined the source of racial/ethnic minority (REM) disparities in unilateral termination (i.e., the client ending therapy without informing the therapist)--a form of dropout that is associated with poor alliance and outcome. First, the authors tested whether some therapists were more likely to have clients who reported unilaterally terminating as compared with other therapists. Next, the authors examined 2 competing hypotheses regarding the therapists role in termination disparities: (a) that racial/ethnic disparities in unilateral termination are similar across therapists and thus due to other components of the treatment process or (b) that racial/ethnic disparities in unilateral termination are specific to therapists, where some therapists are more likely, on average, to have higher rates of unilateral termination with REM clients as compared with White clients. The sample included 155 REM clients and 177 White clients who were treated by 44 therapists at a university counseling center. The results showed that therapists accounted for a significant proportion of the variation in clients' unilateral termination, and REM clients were more likely to report they unilaterally terminated from therapy as compared with White clients. Furthermore, racial/ethnic disparities in clients' report of unilateral termination varied across therapists' caseloads. These results suggest that therapists have a central role in their clients' unilateral termination and have implications for understanding racial/ethnic mental health disparities.     

Comparing natural and abstract categories: A case study from computer science

In order to address the issue of whether abstract and concrete objects are categorized similarly, this paper looks at how computer scientists categorize the common concepts of their field. Using the methodology of Rosch, Mervis, Gray, Johnson, and Boyes-Braem (1976) and of Rosch and Mervis (1975) to identify the categorizations used by computer scientists, this study found that the categorization phenomena reported for concrete objects are quite general, operating over a wider range than was previously thought.     

Vision with equiluminant colour contrast: 2. A large-scale technique and observations.

A simple technique is described for producing large-scale, tritanopic displays. The technique reproduces the various phenomena of vision with equiluminous-colour contrast that have previously been reported with red/green stimuli. It is, however, much less demanding technically, robust against artifacts, and can be used on large-scale scenes. One advantage of the technique is that a piece of blue filter can be used individually by each observer to compare quickly tritanopic and luminance conditions.