大学生SCL－90测试结果的研究

采用ＳＣＬ－９０临床症状自评量表,对随机抽取的安徽大学１－４年级２００名学生进行测试,结果表明：大学生心理健康总体水平低于全国成人常模;生源于城市和农村的大学生相比,总体差异不显著;生源于应届高中毕业生和历届高中毕业的大学生相比,在恐怖和精神病性两因子上,前者的均分显著高于后者;男女大学生相比,女大学生在抑郁和恐怖两个因子上的均分显著高于男大学生。     

恐惧发生与预防的实验研究：──Ⅰ、强烈噪音下恐具行为的动物模型

通过不同方法对ＳＤ型大鼠分四组进行实验处理,观察比较大鼠的行为,发现：在突然的高强度噪音条件下,大鼠出现恐惧的行为反应;强刺激组大鼠恐惧行为较控制组明显增多,行为的唤醒适应能力异常,并存在显著的个体差异;噪音脱敏训练对提高大鼠在高强噪音条件下的应激能力、减少恐惧具有良好的促进作用;在脱敏训练中尤以逐渐递增噪音强度、刺激时间与平均分配实验日结合的方法效果最为显著。     

加压素对记忆巩固过程作用的研究 Ⅱ.GABA在加压素易化记忆巩固过程中作用的探讨

本文探讨了脑内GABA能神经元在加压素易化记忆巩固过程中的作用。结果表明,第三天建立实验后立即腹腔注射印防己毒素(picrotoxin,0.5mg/kg),消除了加压素对条件反应消退过程的延缓作用,而注射氨氧乙酸(aminooxy-acetic acid,20mg/kg)获得相反结果。 实验结果提示,脑内GABA能神经元可能参与了加压素对记忆巩固过程的易化作用。     

AN EXPERIMENTAL COMPARISON OF A CONTINGENCY MANAGED COURSE WITH LARGE LECTURE METHOD1

Contingency management procedures resembling the Personalized System of Instruction (PSI) were compared with a conventional lecture method in teaching an introductory psychology course. The use of a within-subjects design in which half of the students experienced both teaching conditions made it possible to examine the reliability of test-score differences over time when subjects were balanced over conditions. In the contingency management course, material was broken down into 14 small units, each unit covering about 30 pages of text. Students were assigned to an undergraduate teaching assistant who was encouraged to develop a close working relationship with each of his/her 13 assigned students. Specifically, this meant that the assistant was to call each student by his/her first name, show an interest in the student's quiz performance, help the student understand difficult concepts, and discuss various topics of interest to the student. Each week, the teaching assistant administered up to four different 10-item multiple-choice quizzes over the week's chapter. A modified “Doomsday Contingency” required each student either to achieve a score of 80% on one of the four quizzes or drop the course. Most students passed the quiz during the first session of the week; those not passing were tutored on special areas of weakness. No student was actually forced to leave the course under the Doomsday Contingency. Although quizzes were administered on a group basis, they were scored individually while the student stood near by. In addition to the weekly quiz assignment, students under the contingency management procedures were asked to attend one lecture per week. The contingency management method departed from traditional PSI in that (1) self pacing was minimal, such that students were required to master one unit per week or drop the course, (2) teaching assistants met with students in small groups, and usually gave individual tutoring only to those students who did not pass the quiz on the first attempt, and (3) students were asked to attend one lecture per week. However, it was similar to PSI in that small units of subject matter were assigned and unit mastery was assessed through use of undergraduate assistants who delivered immediate feedback. Students in the conventional lecture group attended three 50-min lectures each week; two of these lectures followed textbook material closely, while the third, which was attended by all students, concerned material only indirectly related to the text. As a result, students in both conditions were exposed to essentially identical material. Students in the lecture condition could also obtain copies of the unit quizzes, although few did so. Course grades were determined by scores on two 45-item multiple-choice hourly exams, each covering half of the semester material (each worth 25%), and by a 90-item final exam over the entire course (worth 50%). These measures also served as the dependent variables. The experimental design employed a crossover technique in which one fourth of the students began with the contingency management method and then switched to lecture method at midsemester, while another fourth began with the lecture method and switched to contingency management. The other students stayed in the same condition throughout the semester, half under contingency management and half under the lecture method. On the last day of class, all students filled out an extensive questionnaire that assessed their opinions and attitudes about the teaching techniques. In addition to allowing for assessment of any progressive effects that the contingency management procedures might have had over time, the crossover design also permitted students to make meaningful comparisons of the two teaching methods, since half of the students experienced both methods in the same course. Although average test performance was only slightly higher under the contingency management condition, this difference occurred on each exam and was statistically reliable in each case. Further, the method did not interact with time, as it produced about a three-item advantage per half semester. On each of the three exams, teaching method accounted for between 5 and 8% of the total variance in test scores. Finally, attitude measures indicated that students experiencing half a semester of the contingency management procedures preferred them to the lecture technique, but that only those students with a full semester of contingency management rated the course significantly better than students in the full semester lecture course.     

成年熟练读者的汉字读音加工过程

本研究对成年熟练读者的汉字读音过程作了初步探讨。被试为大学生,实验材料以形声字为主,研究方法使用命名潜伏期法。实验一研究了不同字形、不同字频的单个汉字的读音,发现被试读汉字有直接提取、声旁及类似推理三种加工方式。高频字的读音以提取为主;中频字读音时,声旁和类似推理的作用增加;低频字读音时提取基本不起作用。实验二中发现,声旁的发音一致性对低频字的读音影响很大。激活熟悉的类似字,以确定刺激字的读音,是低频字读音的一个重要方式。     

The persistence of some effects of handling in infancy on the behaviour of the adult rat

An attempt was made to discover how persistent the effects of handling before weaning are on activity, grooming, emotional elimination and learning in adult rats; whether there is an interaction of the effects of handling and the effects of cage size on the behaviour of rats; and whether the daily removal of the mother during nursing has any effects on the pups.

Since all differences between handled and undisturbed animals found at 50 or 100 days were found at 220 days, it was concluded that the effects of handling in infancy are persistent. The hypothesis that cage size and removal of the mother during nursing significantly affect adult behaviour was not supported by the results.     

Temporal Coding in Pavlovian Conditioning: Hall-Pearce Negative Transfer

The Hall-Pearce (1979) negative transfer effect in rats was used to examine whether temporal relationships are coded as part of the informational content of associations that result from CS-US pairings. The transfer effect consists of adeficit in conditioned responding following CS-US pairings in Phase 2 that results from prior CS-US pairings in Phase 1. strong weak Using conditioned bar-press suppression, we found that gaps of different duration between CS termination and US onset in the two training phases resulted in less of a Hall-Pearce negative transfer effect than did an equivalent gap in the twotraining phases. The results are discussed with respect tothe temporal coding hypothesis (Matzel, Held, &Miller, 1988), the Pearce and Hall (1980) model, and Bouton's (1993) interference model.     

社区卫生服务——体现效率与公正特征的改革之路

社区卫生服务比较全面地体现了公正与效率的原则，是卫生改革的一项重大举措。它公正有效地突破了固有的卫生体制；公正有效地实现了“人人享有初级卫生保健”的目的；公正有效地推进了医学模式的转移；公正有效地抓住了纠风的症结；公正有效地解决了医疗费居高不下的顽症。