כִּי אֲתָא רַב דִּימִי אָמַר: טַטְרוֹגֵי מְטַטְרְגִי לְהוּ בְּנֵי גָדֵר לִבְנֵי חַמָּתָן, וּמַאי ״הִתִּיר״ — הִתְקִין.

The Gemara relates that when Rav Dimi came from Eretz Yisrael to Babylonia, he said: This ruling was issued not due to their respective Shabbat limits, but rather because the residents of Geder would assault [metatreg] the residents of Ḥamtan. And what does it mean that Rabbi Yehuda HaNasi permitted the residents of Geder to descend to Ḥamtan, but not vice versa? He instituted this. In other words, this was not a halakhic ruling, but rather an ordinance instituted to protect the public welfare and prevent fighting.

וּמַאי שְׁנָא שַׁבָּת, דִּשְׁכִיחָא בָּהּ שִׁכְרוּת.

The Gemara asks: What is different about Shabbat that Rabbi Yehuda HaNasi instituted this ordinance only for Shabbat and not for the rest of the week? The Gemara answers: Drunkenness is common on Shabbat, when people eat to their heart’s content. Therefore, there is a greater chance of violent behavior.

כִּי אָזְלִי לְהָתָם, נָמֵי מְטַטְרְגִי לְהוּ? כַּלְבָּא בְּלָא מָתֵיהּ, שַׁב שְׁנִין לָא נָבַח

The Gemara asks: When the residents of Geder go to Ḥamtan, they will assault the residents there; of what use, then, is this ordinance? The Gemara answers, citing a popular saying: A dog that is not in its place will not bark for seven years. On its own turf, a dog barks readily, but it becomes scared in unfamiliar surroundings and remains silent. Similarly, the people of Geder are not nearly as bold when they visit Ḥamtan as they are in their own town.

הַשְׁתָּא נָמֵי מְטַטְרְגִי בְּנֵי חַמָּתָן לִבְנֵי גָדֵר! כּוּלֵּי הַאי לָא כָּיְיפִי לְהוּ.

The Gemara asks: If so, we should be concerned about the reverse scenario, that now too, the residents of Ḥamtan, in their home territory, will take revenge and assault the residents of Geder. The Gemara answers: The people of Geder would not be submissive to such an extent. While visiting Ḥamtan, they would not initiate fights, but they would certainly fight back if they were attacked. Consequently, the people of Ḥamtan would not dare initiate hostilities with them. Therefore, there is no concern about the safety of either group.

Research:

Ryan Boyko, a research assistant in the Department of Psychology in the Faculty of Arts and Sciences at Harvard University, studied 5,000 English Premier League games from 1992 to 2006, to discern any officiating bias and the influence of home crowds. The data was published in the Journal of Sports Sciences and suggested that for every additional 10,000 people attending, home team advantage increased by 0.1 goals. Additionally, his study proved what many football fans already suspect: that home teams are likely to be awarded more penalty kicks, but crucially, this is more likely with inexperienced referees. So, consideration of referee profiles should clearly be a refinement for home field advantage statistics.

Sports Illustrated, in a 17 January 2011 article, reported that home crowds, rigor of travel for visiting teams, scheduling, and unique home field characteristics, were not factors in giving home teams an advantage. The journal concluded that it was favorable treatment by game officials and referees that conferred advantages on home teams. They stated that sports officials are unwittingly and psychologically influenced by home crowds and the influence is significant enough to affect the outcomes of sporting events in favor of the home team.

An evolutionary psychology explanation for the home advantage effect refers to observed behavioral and physiological responses in animals when they are defending their home territory against intruders. This causes a rise in aggression and testosterone levels in the defenders. A similar effect has been observed in football with testosterone levels being significantly higher in home games than in away games. Goalkeepers, the last line of defense, have particularly strong testosterone changes when playing against a bitter rival as compared to a training season. How testosterone may influence results is unclear but may include cognitive effects such as motivation and physiological effects such as reaction time.

SOURCE: https://en.wikipedia.org/wiki/Home_advantage

Some psychological implications are: Be respectful to guests, in laws, spouses who are by in-laws, newcomers to classes etc.

for Video Shiur click here to listen:  Psychology of the DAF Eruvin 61

Translations Courtesy of Sefaria