Perfectionism and components of state and trait anxiety

The association between dimensions of perfectionism and state and trait anxiety was examined in three studies. Study 1 and Study 2 were correlational studies that investigated the link between dimensions of perfectionism (i.e., self-oriented, other-oriented, and socially prescribed perfectionism) and the Endler Multidimensional Anxiety Scales (EMAS). Taken together, the results indicated that self-oriented and socially prescribed perfectionsim are correlated significantly with both the cognitive-worry and autonomic-arousal components of state anxiety. As for the trait anxiety measures, self-oriented perfectionism was associated with the ambiguous and social evaluation facets in Study 1, and socially prescribed perfectionism was associated with the ambiguous and daily routines facets in Study 2. The purpose of Study 3 was to examine perfectionism and state anxiety under conditions of high versus low ego involvement. It was found that socially prescribed perfectionism was associated with higher state anxiety, but only in the high ego involvement condition. Self-oriented perfectionism was unrelated to state anxiety in either experimental condition. Overall, the findings indicate that socially prescribed perfectionism is the dimension linked most closely with components of state and trait anxiety, especially under conditions of ego threat. The results are discussed in terms of the need for an interactional approach to the study of the social aspects of both perfectionism and anxiety.     

A multi-dimensional model for treating families that have survived mother assault

This paper offers a multidimensional family systems approach to treating children and their mothers in families who have survived violence and are in father-absent families. The model incorporates theoretical and clinical ideas from the child witness-to-violence field, the field of traumatic stress, and from feminist thinking. Three areas of intervention are detailed.The authors gratefully acknowledge the suggestions of the reviewers.     

Books reviews

Journal of Medical Humanities -     

HyperCourseware for interactive instruction in the electronic classroom

An electronic classroom with computer workstations and multimedia offers tremendous potential for interactive instruction. To support such instruction, HyperCourseware was developed as an environment and authoring system that recreates on a computer network familiar objects of instruction, such as the syllabus, lecture notes, class rolls, seating charts, exams, and grade lists. In addition, it provides interactive and collaborative tools for group discussion, anonymous feedback, student polling, and shared collaborative workspaces. Applications in statistics and cognitive psychology are discussed along with the specific advantages due to hypermedia links, structure of course materials, integration of parts, and classroom interactivity. Student and faculty evaluations have supported the positive educational benefits of both the electronic classroom and HyperCourseware in general.     

Measurement of forearm rotation: The technique,and its reproducibility and validity

Forearm rotation is a point of interest in the study of human movement. For the most part, earlier methods for determining this joint rotation could be applied only in restricted situations. In this paper, a new technique is described, which involves the use of a three-dimensional opto-electronic motion registration system. With only two cameras, the supination angle in almost every position can be determined. A bracelet is attached to the subject’s forearm and fixed to the radius. Wrist points are defined in relation to this bracelet (in its local coordinate system). The properties of the bracelet allow the motion-registration system to calculate its position in the global coordinate system. Given the position of the bracelet, the shoulder, and the elbow, the rotation angle can be determined. The reproducibility (error less than 2^o) of and validity of the technique are also discussed.     

Discrimination of 3-D shape and 3-D curvature from motion in active vision

We examined the ability of human observers to discriminate between different 3-D quadratic surfaces defined by motion, and with head position fed back to the stimulus to provide an up-to-date dynamical perspective view. We tested whether 3-D shape or 3-D curvature would affect discrimination performance. It appeared that discrimination of 3-D quadratic shape clearly depended on shape but not on the amount of curvature. Even when the amount of curvature was randomized, subjects’ performance was not altered. On the other hand, the discrimination of 3-D curvature clearly depended linearly on curvature with Weber fractions of 20% on the average and, to a small degree, on 3-D shape. The experiment shows that observers can easily separate 3-D shape and 3-D curvature, and that Koenderink’s shape index and curvedness provide a convenient way to specify shape. These results warn us against using just any arbitrary 3-D shape in 3-D shape perception tasks and indicate, for example, that emphasizing 3-D shape in computer displays by exaggerating curvature does not have any effect.     

Linear relations amongk sets of variables

A family of solutions for linear relations amongk sets of variables is proposed. It is shown how these solutions apply fork=2, and how they can be generalized from there tok3.The family of solutions depends on three independent choices: (i) to what extent a solution may be influenced by differences in variances of components within each set; (ii) to what extent the sets may be differentially weighted with respect to their contribution to the solution—including orthogonality constraints; (iii) whether or not individual sets of variables may be replaced by an orthogonal and unit normalized basis.Solutions are compared with respect to their optimality properties. For each solution the appropriate stationary equations are given. For one example it is shown how the determinantal equation of the stationary equations can be interpreted.     

SOCIAL VALIDATION: THE EVOLUTION OF STANDARDS OF COMPETENCY FOR TARGET BEHAVIORS

The use of social validation procedures has become widespread in recent years. Although most researchers have used social validation procedures to select target behaviors and to evaluate whether the changes produced by a treatment program should be considered socially useful, little attention has been focused upon using the social validation process to determine the optimal levels for target behaviors. This paper suggests several ways in which social validation procedures can be employed in order to select when and how much to change target behaviors.