ERPS reflecting parallel and serial processing of colour arrays.
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Adult↗
Biomedical subjects
M Eals
Publications and source records attributed to M Eals.
Asymmetric processing in perception of apparent movement.
Asymmetric processing of movement-simulated spatial arrays was studied by the method of successive random presentation to the left or right visual half-field. On each trial two arrays consisting of between 2 and 5 dots were tachistoscopically presented in rapid succession to one visual half-field, in such a way as to simulate movement of the dots. Subjects' response choice represented a presumed continuation of the apparent movement. This was assumed to involve a process of prediction in that subjects inferred the trajectory of the stimulus dots in order to choose a response array. Response accuracy, which was measured by the number of correct response arrays chosen from a three-array series on each trial, was greater when dot arrays were presented to the left visual half-field than when they were presented to the right half-field. It was concluded that the right hemisphere of the brain plays an important role in processing for this task, and task features that may be attributed to right hemisphere processing were discussed.
Adult↗
The detection of psychiatric morbidity and associated factors in patients with rheumatoid arthritis.
Eighty-six patients with a confirmed diagnosis of rheumatoid arthritis were surveyed to assess the extent of psychiatric morbidity as indicated by two screening questionnaires, the General Health Questionnaire and the Hospital Anxiety and Depression Scale. In addition to an investigation of the concordance of the screening questionnaires, a description of demographic characteristics and measures of disability were taken. Disability due to arthritis was indicated by measures of years of chronicity, pain, duration of morning stiffness, functional level, active treatment involvement, and presence of coexisting medical problems. The relationship of physical symptoms to level of psychiatric distress was investigated. Psychiatric cases were identified using recommended cut off scores on results of the screening questionnaires. GHQ cut off scores of 6/7 identified as "cases" 31.8% of the sample. HADS subscale cut off scores of 8/9 identified 21.4% of subjects with "anxiety" and 19.0% with "depression" scores in the morbid range. Nineteen percent of patients were found to have scores on both tests concurrently in the pathological range.
Adult↗