The role of edges in object recognition by pigeons

In three experiments, we explored how pigeons use edges, corresponding to orientation and depth discontinuities, in visual recognition tasks. In experiment 1, we compared the pigeon's ability to recognize line drawings of four different geons when trained with shaded images. The birds were trained with either a single view or five different views of each object. Because the five training views had markedly different appearances and locations of shaded surfaces, reflectance edges, etc, the pigeons might have been expected to rely more on the orientation and depth discontinuities that were preserved over rotation and in the line drawings. In neither condition, however, was there any transfer from the rendered images to the outline drawings. In experiment 2, some pigeons were trained with line drawings and shaded images of the same objects associated with the same response (consistent condition), whereas other pigeons were trained with a line drawing and a shaded image of two different objects associated with the same response (inconsistent condition). If the pigeons perceived any correspondence between the stimulus types, then birds in the consistent condition should have learned the discrimination more quickly than birds in the inconsistent condition. But, there was no difference in performance between birds in the consistent and inconsistent conditions. In experiment 3, we explored pigeons' processing of edges by comparing their discrimination of shaded images or line drawings of four objects. Once trained, the pigeons were tested with planar rotations of those objects. The pigeons exhibited different patterns of generalization depending on whether they were trained with line drawings or shaded images. The results of these three experiments suggest that pigeons may place greater importance on surface features indicating materials, such as food or water. Such substances do not have definite boundaries cued by edges which are thought to be central to human recognition.     

Deconstructing, reconstructing, preserving Paul E. Meehl's legacy of construct validity

The question of the status of cause-and-effect explanations of human behavior that posit physically existing causative factors and those that, on the other hand, posit hypothetical entities in the form of "useful fictions" has a long history. The influence of the works of Jeremy Bentham and Hans Vaihinger, as well as the later influence of Francis Galton, is described. Issues of the validity of hypothetical constructs and related problems of measurement and definition as found in psychoanalytic theory construction and in trait theory are examined. The significant and continuing interest generated by the landmark studies of K. MacCorquodale and P. E. Meehl (1948) and L. J. Cronbach and P. E. Meehl (1955) as well as the central importance of P. E. Meehl's thinking are described.     

Monitoring psychotherapy with performance-based measures of personality functioning

In this commentary, I review a meta-analysis and three original research reports concerning the Rorschach (Exner, 2003; Rorschach, 1921/1942) and the Thematic Apperception Test (TAT; Murray, 1943) assessment in psychological treatment planning and outcome evaluation. The information in these four articles bears witness to the potential utility of performance-based personality assessment measures for this purpose. The strengths and limitations of the articles suggest several guidelines for future research designed to examine this Rorschach and TAT application including an emphasis on effectiveness studies, longitudinal data, integrated independent variables, observable dependent variables, sophisticated data analysis combining nomothetic and idiographic presentation, and the incremental contribution of performance-based measures to psychotherapy-related personality assessment.     

Changes in adolescent response patterns on the MMPI/MMPI--a across four decades

The purpose of this study was to explore changes in adolescent self-presentation on the Minnesota Multiphasic Personality Inventory (MMPI; Hathaway & McKinley, 1940) and MMPI-A (Butcher et al., 1992) over a 40-year period. The primary samples used for comparison in this study include 1,235 adolescents, age 14 through 16, derived from the MMPI-A normative sample (Butcher et al., 1992) collected in 1989 and 10,514 adolescents, age 14 through 16, collected in 1948 and 1954 from Hathaway and Monachesi's (1963) study of adolescent personality and behavior. MMPI basic scale and item-level data were also included for 817 adolescents, age 14 through 16, collected by Colligan and Offord (1992) in 1985 as a further comparison. Between-sample analyses at the profile level revealed that adolescents from the MMPI-A normative sample scored significantly higher across basic clinical scales and lower on validity scales L and K than adolescents from the Hathaway and Monachesi (1963) sample, with mean data from the Colligan and Offord (1992) sample typically falling at a midpoint value. Analyses of Harris-Lingoes (Harris & Lingoes, 1955) subscale and item-level data were conducted to provide refined definitions of the contents of scale-level changes. Results were interpreted as reflecting moderate to large changes in response frequencies between eras of data collection, and emphasis was placed on the relatively high frequency of item endorsements by contemporary adolescents in the clinical direction in the MMPI-A normative sample. A series of cautions and limitations are also offered in interpreting these patterns.     

The Unseen Cost: A Discussion of the Secondary Traumatization Experience of the Clergy

The vocation of clergy life can be a hazardous journey. Stress and burnout are issues, which are increasingly reported by clerics. Burnout is defined by a constellation of work related symptoms (Doolittle, Mental Health, Religion & Culture,10(1), 31–38, 2007), with emotional exhaustion recognised as a core component. Despite this recognition the research has not focused on factors which lead to this state of emotional exhaustion in particular secondary traumatization. The purpose of this article is threefold. Firstly, it presents the theoretical framework of secondary trauma. Secondly it reviews the literature aligning clergy and trauma work and thirdly it discuses the emotional and physical toll upon clergy from this aspect of their role.     

Cultural Adaptation and Sexual Harassment in the Lives of Asian American Women

ABSTRACT

Despite the prevalence of both historical and current race- and gender-based stereotyping of Asian American women, little is known about their experiences and attitudes regarding sexual harassment. In this study, 109 Asian American women enrolled in a state university or a 2-year community college responded to questionnaires about cultural orientation, experiences of sexual harassment, and sexual harassment attitudes. Asian cultural orientation was associated with sexual harassment attitudes. Specifically, among women with low White cultural orientation, there was a statistically significant positive association between Asian cultural orientation and acceptance of sexual harassment. Results from this study have important implications for clinical practice with Asian American women, including issues of migration, cultural orientation, and the intersection of racism and sexism in the United States.     

Do humans and baboons use the same information when categorizing human and baboon faces?

What information is used for sorting pictures of complex stimuli into categories? We applied a reverse correlation method to reveal the visual features mediating categorization in humans and baboons. Two baboons and 6 humans were trained to sort, by species, pictures of human and baboon faces on which random visual noise was superimposed. On ambiguous probe trials, a human-baboon morph was presented, eliciting "human" responses on some trials and "baboon" responses on others. The difference between the noise patterns that induced the two responses made explicit the information mediating the classification. Unlike the humans, the baboons based their categorization on information that closely matched that used by a theoretical observer responding solely on the basis of the pixel similarities between the probe and training images. We show that the classification-image technique and principal components analysis provide a method to make explicit the differences in the information mediating categorization in humans and animals.     

Group Psychotherapy in the Treatment of Some Neurodermatoses

The relation of patient verbal activity to pretherapy symptom status and outcome was examined for ninety patients in time-limited group psychotherapy. For each half-hour segment the most verbally active member, or main actor (MA), was identified. Verbal activity was measured by counting the number of times each patient was MA during the course of the group. Outcome was assessed by administering a battery of instruments pre- and posttherapy and by obtaining direct ratings of patient benefit from the patient, therapist, and an independent rater: the number of times MA was found to be significantly correlated with four pretherapy measures, indicating that the most disturbed patients were most active in these group; the number of times MA was also correlated with patient and therapist benefit ratings, indicating that therapists and patients themselves agreed that those who spoke the most benefited the most. However, partial correlations between number of times MA and other outcome measures did not produce any significant relationships. Thus, it does not appear that patient verbal activity is related to outcome, as measured by objective instruments.