Summarize the methods used and results obtained by Deutsch and Krauss in their "trucking game" experiment.

Deutsch and Krauss conducted an experiment known as the "trucking game" to study the effects of cooperation and competition on intergroup relations. In this experiment, participants were divided into two groups and were asked to engage in a simulated trucking business. The groups were either placed in a cooperative condition, where they were told that their success depended on the combined efforts of both groups, or a competitive condition, where they were told that only one group could be successful at the expense of the other.

The methods used in the experiment involved observing the interactions and behaviors of the participants in both the cooperative and competitive conditions. The researchers also measured the levels of cooperation, communication, and conflict between the groups. Additionally, they collected data on the participants' attitudes and perceptions of the other group.

The results of the experiment showed that in the cooperative condition, the groups were more likely to communicate and cooperate with each other, leading to higher levels of success for both groups. In contrast, in the competitive condition, the groups exhibited more conflict and less cooperation, resulting in lower overall success.

Overall, the "trucking game" experiment demonstrated the impact of cooperation and competition on intergroup relations, highlighting the importance of cooperative efforts in achieving mutual success.