The purpose of this dissertation was to, from the point of view of interaction, study how the factors group size, group composition, group norm and problem type influenced group problem solving. Three classroom studies were performed in grades four and five of the Swedish nine-year compulsory school. In addition to the participants in various pilot studies, the experiment included 1146 pupils. The performance was measured both regarding group results and the individual short-term and long-term retention of knowledge. A fifth factor, group productivity, was formed on the basis of these two measurement values.Group size 1, 2, 3 and 6 were studied. The group composition was defined on the basis of, on one hand, the ability levels high, middle and low and, on the other, on the basis of sex. The group norms were included through instructions about cooperation and competition. A third group norm, so-called free norms, was also introduced. Two problem types were used. One of them was designed so that the other group members would easily be able to judge if a response from one of the group members was correct or not (high accessibility). The other problem type was defined in terms of low accessibility. The first study included the factors group size and group composition (ability), the second study included group composition (sex), group norm, problem type and group productivity, and the third study included all five factors. The factor group size turned out to be of great importance and interacted with each of the other factors. Only high ability pupils could make use of group size in interaction with e. g. the factor group composition. Group composition was also interesting regarding sex. Co-operation favoured girls and competition favoured boys. The results also indicate that girls remember what they learn better than boys. Interactions between the factor group norm and the factors group size, problem type and group productivity showed that, in no case, did co-operation produce poorer results than competition and free norms. Various interactions with the factor problem type and other factors showed that larger group sizes are more favourable to the solving of problems with a high accessibility than to the solving of problems with a low accessibility. However, the individual group members had a better recollection of the solutions to problems with a low accessibility than to problems with a high accessibility. The factor group productivity was included in interactions with each of the other factors and in the three-way and four-way interactions. These interactions indicate that the factor group productivity, in terms of both group results and individual results, is an important factor in group research and in other classroom research.By way of conclusion, the results are discussed regarding educational implications and continued research. / digitalisering@umu

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霸凌事件頻繁出現在各大報章雜誌，霸凌受害者在霸凌事件中經常處於權力不均等的地位，無法主動求援。借鏡西方之成功反霸凌計畫，發現霸凌事件中旁觀者的反應對於揭露、制止霸凌有相當之重要性。本研究將霸凌旁觀者區分為保護者以及局外者，過往研究發現兩者雖同為霸凌事件之旁觀者，然其行為結果卻有截然不同的影響。保護者行為的出現，可使學生對校園安全感受提高並有助於降低霸凌發生率，局外者行為則否。本研究參考Latané 與 Darley（1970）提出之旁觀者決策歷程模式等助人行為理論，推論學生對霸凌的態度、個人責任感，以及同儕團體規範會影響旁觀者的行為傾向，期望透過本研究了解國中學生旁觀霸凌事件的反應傾向，以及影響旁觀者行為之個人及同儕因素。 本研究採取實證典範之調查研究方法，研究樣本包和高雄市都會區國民中學421位學生，並且採用描述性統計、T檢定、單因子變異數分析以及多元迴歸等研究方法，依據受試者在「旁觀者行為」量表、霸凌「態度」量表、「個人責任感」量表以及「同儕團體規範」量表之得分進行統計分析。研究發現如下： 一、高雄市都會區國中學生，具有中度之保護者行為以及局外者行為傾向。 二、女性相較於男性較傾向出現保護者行為，對霸凌持較高的反對態度，且對「朋友」具有較高之個人責任感。 三、學生對「同學」之「個人責任感」受到「年級」所影響，「七年級」學生對於同學之個人責任感高於「八、九年級」學生。 四、學生對於「同學」之「個人責任感」以及「同儕團體規範」可以預測「保護者行為傾向」以及「局外者行為傾向」。 最後，依據本研究的結果提出實務建議與未來研究方向。 / Bullying is frequently reported in major newspapers and magazines. Bullying victims are usually in a disadvantaged position making them unable to call for help on their own. Successful anti-bullying programs in the west have found that bystanders hold an important role in the disclosure or cessation of bullying incidents. This study classified bystanders into defenders and outsiders. Although both are bystanders, defenders could increase a sense of security on campus and reduce the incidence of bullying. Outsiders, on the other hand, could not achieve such effect. Using Latané & Darley, s decision-tree model of bystander intervention, this study hypothesized that personal attitude and responsibility and peer group norm toward bullying would affect bystander behavior in the incidence of bullying. This study aimed to understand the way Taiwanese junior high students responded to bullying and factors that might affect bystander behavior. Using survey research method, data were collected from 421 junior high school students in Kaohsiung Metropolitan Area as samples using questionnaires, including bystander behavior scale, bullying attitude scale, personal responsibility scale, and peer group norms scale. Statistical methods, such as descriptive statistics、t-tests、one way ANOVAs, and multiple regressions, were used, and the results are reported in the following: 1.Junior high school students in Kaohsiung Metropolitan Area had above average scores in their behavioral tendency as defenders or outsiders in incidence of bullying. 2.Female tended to have more defender behavior than male did. Also, female tended to oppose bullying more strongly and showed more sense of personal responsibility if “a friend” was bullied. 3.“Seventh graders” showed stronger sense of personal responsibility than 8th and 9th graders. 4.The sense of personal responsibility if “a classmate” was bullied and peer group norm (peers tended to aid the victims) both predicted behavioral tendency as defenders and outsider. Implications and future directions were discussed.