关于完善我国医学教育体系的思考

当前我国社会经济的迅猛发展,已经对现行的医学教育体系提出了强有力的挑战。从医学教育自身特点出发,探讨我国现行医学教育体系的一些重要缺陷及其对策。建议全面引入医学教育国际标准,调整培养要求,积极稳妥地推行长学制医学教育,建立严格而规范的毕业后基本职业技能培训及职业准入制度,理顺高等教育体系内的医学教育统一管理体制,以完善我国医学教育体系。     

Segregation by color/luminance does not necessarily facilitate motion discrimination in the presence of motion distractors

Under what circumstances is the common motion of a group of elements more easily perceived when the elements differ in color and/or luminance polarity from their surround? Croner and Albright (1997), using a conventional global motion paradigm, first showed that motion coherence thresholds fell when target and distractor elements were made different in color. However, in their paradigm, there was a cue in the static view of the stimulus as to which elements belonged to the target. Arguably, in order to determine whether the visual system automatically groups, or prefilters, the image into different color maps for motion processing, such static form cues should be eliminated. Using various arrangements of the global motion stimulus in which we eliminated all static form cues, we found that global motion thresholds were no better when target and distractors differed in color than when they were identical, except under certain circumstances in which subjects had prior knowledge of the specific target color. We conclude that, in the absence of either static form cues or the possibility of selective attention to the target color, features with similar colors/luminance-polarities are not automatically grouped for global motion analysis.     

A Review of: “Fairburn,C. G. (2008). Cognitive Behavior Therapy and Eating Disorders.”

Successful reports of behavioral treatment of encopresis describe interventions as unpleasant as the disorder: hospitalization, laxatives, prompted toileting, aversive consequences. The focus on soiling rather than on the constant constipation that precedes encopresis, on the reduction of soiling rather than on the acquisition of effective toilet use. Five normal chronically constipated children (four of whom were encopretic) were treated at home with combinations of: preparatory instructions, rewards for clean pants, reward for appropriate toileting (bowel movement in toilet). Once soiling was eliminated and appropriate bowel movements occured regularly, all families were taught to fade treatment contingencies. To determine the contribution of the toileting reward to treatment effectiveness, this reward was added to the other two treatment components in a multiple baseline across four cases; it provided a significant ingredient in short-term success. A fifth child achieved short-term success with only the instructions and the clean pants reward. Long-term results (11-20 months) revealed that the fifth child, who never received the toileting reward, was the only one who relapsed.