The approximation of a group stimulus space by averaging responses to selected subsets of the stimuli

This paper presents a simple random procedure for selecting subsets of stimulus pairs for presentation to subjects. The resulting set of ratings from the group of subjects allows the construction of a group (average) space through the use of the computer program TORSCA-9 or equivalent programs. The procedure is applied to both real and simulated data. It is found that subjects need only make between 20% and 50% of the usual judgements to reconstruct a reasonably accurate group space.     

COMPARING THE TORTOISE AND THE HARE:

Abstract— Recent research suggests that dynamic spatial reasoning tasks show more robust gender differences than static spatial reasoning tasks. These differences have implications for selection procedures based on aptitude test scores. Two experiments were therefore designed to examine the locus of such gender differences. In Experiment 1, 82 males and 82 females performed two separate tasks: judging the relative velocity of moving objects and judging their relative distances from target destinations. Significant gender differences occurred only for relative velocity judgments and were partially related to prior experience. A second experiment therefore tested the effects of practice and feedback on performance judging relative velocity. Male and female performance differences were again found, and performance improved equally as a result of feedback. Consistent with contemporary views of aptitude and assessment, the data suggest that equitable assessment of dynamic spatial abilities requires a determination of experiential history and learning rates as well as absolute performance levels.     

An emergency situation simulator for examining time-pressured decision making

Between deliberate planning efforts and reactionary decision making lies a realm of time-pressured decision making. A number of real-world occupations deal with this realm on a regular basis, including air traffic controllers and emergency service dispatchers. To study this type of decision making, an emergency situation simulator has been developed, which recreates the stressful environment of the emergency service dispatcher by generating realistic hypothetical emergency situations.     

Perceived trauma: its etiology and treatment

Female adolescents in treatment for emotional disturbances are often diagnosed as suffering from borderline personality disorder. The usual treatment plan for such a diagnosis is based upon limit setting and boundary reinforcement. When this fails to produce results, the diagnosis comes into question. The present paper investigated 85 female adolescents who were being treated for problems associated with differentiation and emancipation in an inpatient setting. A treatment variation was introduced which suggested that these females were more likely to be suffering from a variety of post-traumatic stress disorder (PTSD). When their ritualistic behavioral repetitions were addressed by cognitive behavioral approaches, the behavior decreased. The struggle with boundary issues and references to the historical context of misery and deprivation became less frequent when the focus shifted to current behavior. Two groups emerged through the analysis of data. No difference in behavior or response to treatment could be established, but one group lacked a specific troubling experience which is essential for a diagnosis of PTSD. Maladaptive social behavior (e.g., splitting and projection) were accepted as confounding factors associated with cognitive style rather than "borderline" symptoms. With the new approach, recidivism decreased 14% and the number of outbursts diminished 10% to 12%. The altered treatment approach confirmed the hypothesis that these adolescents were experiencing the effects of trauma (actual or perceived) rather than some disabling personality disorder.     

Place learning in virtual space III: Investigation of spatial navigation training procedures and their application to fMRI and clinical neuropsychology

This paper describes the utilization of a desktop virtual environment task, the Computer-Generated (C-G) Arena, in the study of human spatial navigation. First, four experiments examined the efficacy of various training procedures in the C-G Arena. In Experiment 1, participants efficiently located a hidden target after only observing the virtual environment from a fixed position (placement learning). In Experiment 2, participants efficiently located a hidden target after only observing an experimenter search the virtual environment (observational learning). In Experiment 3, participants failed to display alatent learning effect in the virtual environment. In Experiment 4, all training procedures effectively taught participants the layout of the virtual environment, but the observational learning procedure most effectivelytaught participants the location of a hidden target within the environment. Finally, two experiments demonstrated the application of C-G Arena procedures to neuroimaging (Experiment 5) and neuropsychological (Experiment 6) investigations of human spatial navigation.     

Social Neuroscience: Progress and Implications for Mental Health

ABSTRACT— Social neuroscience is a new, interdisciplinary field devoted to understanding how biological systems implement social processes and behavior. Social neuroscience capitalizes on biological concepts and methods to inform and refine theories of social behavior, and it uses social and behavioral constructs and data to inform and refine theories of neural organization and function. We focus here on the progress and potential of social neuroscience in the area of mental health. Research in social neuroscience has grown dramatically in recent years. Among the most active areas of research we found are brain-imaging studies in normal children and adults; animal models of social behavior; studies of stroke patients; imaging studies of psychiatric patients; and research on social determinants of peripheral neural, neuroendocrine, and immunological processes. We also found that these areas of research are proceeding along largely independent trajectories. Our goals in this article are to review the development of this field, examine some currently promising approaches, identify obstacles and opportunities for future advances and integration, and consider how this research can inform work on the diagnosis and treatment of mental disorders.