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A | 北京时间1月14日早些时候，TechCrunch报道说，密歇根州立大学的研究人员正在探索社交媒体成瘾的概念。

B | 他们发现，在日常生活中，使用社交媒体网站的人表现出与可卡因或海洛因上瘾者相似的行为特征。 The ouster of Sri Lankan President Gotabaya Rajapaksa has roused substantial global media attention, particularly in light of the colorful images coming out of the country of protesters storming his opulent Colombo residence and turning it into a tourist attraction, posing for selfies, and organizing pool parties and cookouts.,But the chaos in Colombo isn’t the first time in the last decade or so that a head of state has been ousted from office in a time of crisis and forced to flee, with the last dozen years witnessing at least five comparable cases.,Ashraf Ghani’s Bags of Money,Last August, a ten-day blitzkrieg offensive by the Taliban* to capture cities in the midst of the NATO withdrawal culminated in the fall of Kabul and the collapse of the Afghan government. President Ashraf Ghani, the US-educated academic-turned president, fled the country he ruled at the West’s behest for seven years.,Ghani evacuated Kabul on August 15, the same day that Taliban fighters entered the city, and eventually ended up in the United Arab Emirates, where he took refuge. Ghani apologized to his countrymen and women for bolting, saying that leaving the capital “was the most difficult decision” of his life and that he took it to avoid a repeat of the bloody street fighting witnessed in the city between government and Taliban forces in the 1990s. In addition, he said, his security team had advised him not to stay due to the risk of assassination or capture.,The Russian Embassy in Kabul painted a different story, alleging that Ghani fled the city in a convoy of vehicles stuffed with so much cash that it could not fit in a helicopter which took him out of the country. UK media later alleged that Ghani may have sought to smuggle as much as $169 million in cash out of Kabul, with a former bodyguard later confirming that the ex-president’s entourage was carrying “many big bags” containing “hundreds of millions, perhaps billions of dollars.”,Ghani has categorically rejected the allegations against him, and has said that he would welcome an international investigation to clear his good name.,AfghanistanEx-Afghan President Ghani Says He Was Made 'Scapegoat' for Fleeing, Blames Trump - Report 31 December 2021, 03:27 GMT,Evo Morales’ Happy Ending,On November 10, 2019, Bolivia’s long-serving democratic socialist president Evo Morales was forced to step down after weeks of protests sparked by an election whose results were disputed by the country’s US-backed opposition. Characterizing the crisis as a “coup” and fearing he would be killed by assassins hired out by his enemies, Morales fled to Mexico, where he was granted asylum by President Andres Manuel Lopez Obrador.,The Trump administration hailed Morales’ ouster, with the US president tweeting that the unrest sent “a strong signal to the illegitimate regimes in Venezuela and Nicaragua that democracy and the will of the people will always prevail.”,But the anti-Morales’ plot’s victory was short-lived. Immediately after touching down in Mexico, Morales vowed that he’d remain in politics, and that his “fight” against “discrimination and humiliation” would continue.,In late 2019, after the election victory of leftist forces in Argentina, Morales traveled to that country, where he was granted asylum. In November 2020, after new elections in his home country saw the victory of Luis Arce, his former finance minister, Morales triumphantly returned to Bolivia. Today, although he is not president, Morales remains a major force in Bolivian politics, consistently attacking “Yankee imperialism” and recently calling on Bolivia and Argentina to join forces to become a global lithium-producing superpower.,The fate of his adversaries has not been so bright, with Jeanine Anez, the right wing politician who took over after Morales’ ouster, recently sentenced to ten years in prison for her role in the 2019 coup.,© Photo : Twitter / @evoespuebloFormer Bolivian President Evo Morales during his triumphant return to his home country in November 2020.Former Bolivian President Evo Morales during his triumphant return to his home country in November 2020.© Photo : Twitter / @evoespueblo,Yemen’s Hadi,In 2012, Yemeni politician Abdrabbuh Mansur Hadi seemed to have the world at his feet. Succeeding President Ali Abdullah Saleh, whom he faithfully served as vice president starting in 1994, Hadi won the February 2012 presidential elections with an impressive 100 percent of the vote, running as the sole candidate. He proceeded to initiate a US- and Saudi-supported reform program aimed at transforming Yemen into a federal model of government under which six regions would enjoy large-scale political autonomy. Hadi also supported ramping up cooperation with Washington to fight piracy in the Gulf of Aden, and al-Qaeda** cells attempting to set up shop in Yemen’s sparsely populated northeastern territories.,Hadi’s reforms, allegations of corruption, and the ill-fated decision to end fuel subsidies in 2014 proved fatal, and between late 2014 and early 2015, much of the country was overrun by the Houthis, an Islamist, social justice-oriented political and militant movement dominant in the country’s populous western provinces. In January 2015, Hadi left his presidential palace in Sana’a for the last time, and, without resigning, flew to Saudi Arabia.,© AP Photo / Hani MohammedShiite Houthi tribesmen hold their weapons as they chant slogans during a tribal gathering showing support for the Houthi movement, in Sanaa, Yemen, Saturday Sept. 21, 2019Shiite Houthi tribesmen hold their weapons as they chant slogans during a tribal gathering showing support for the Houthi movement, in Sanaa, Yemen, Saturday Sept. 21, 2019© AP Photo / Hani Mohammed,Two months later, in March 2015, a Saudi-led military coalition began a military operation in Yemen aimed at restoring Hadi to power. Seven years on, the coalition has made little progress, and the impoverished southern Arabian nation remains mired in a deep political, military, economic and humanitarian crisis. Meanwhile, the Houthis have counterattacked by launching drone and missile strikes targeting Saudi infrastructure, military bases, airports, oil facilities, missile defense systems and cities, with no amount of sophisticated US-made air defense hardware seeming sufficient to stop the attacks.,As for Hadi, the exiled president resigned from the post in April, transferring power to an eight-member ‘presidential leadership council’ tasked with negotiating a permanent ceasefire with the Houthis.,Saudi Arabia ‘Pushed’ Yemen’s Hadi to Resign, Placed Him on House Arrest - WSJ17 April, 22:22 GMT,Ukraine’s Yanukovych,Of all the ejections from office featured in this list so far, perhaps none have been more consequential to the geopolitical instability being experienced by the world today than that of Ukrainian President Viktor Yanukovych.,Yanukovych handcrafted the crisis which would culminate in his ouster in the winter of 2013 by pulling a major political U-turn and rejecting an association agreement with the European Union in favor of closer ties with the Russian-led Eurasian Economic Union. The decision prompted pro-EU protesters to flood the center of Kiev, with demonstrators establishing tent encampments and occupying the heart of the city – the Maidan Nezalezhnosti (lit. ‘Independence Square’).,Protests continued for weeks, with Yanukovych making concessions under EU pressure, accepting the resignation of the government of Prime Minister Nikolai Azarov in late January, and negotiating with an increasingly emboldened opposition to try to resolve the crisis.,On February 20, protests turned bloody, with 49 demonstrators and four police officers killed by mysterious snipers in a single day. On February 22, just a day after reaching an EU-backed agreement on the settling the crisis through early elections, Yanukovych fled Kiev in fear for his life, traveling east and slipping across the border into Russia, where he was offered refuge. Pro-European forces in Ukraine’s parliament drafted a resolution to strip Yanukovych of power, claiming he had “withdrawn from his duties in an unconstitutional manner.” From Russia, Yanukovych blasted the new authorities, and characterized his ouster as a coup d’état.,Kiev, Washington Responsible for Failure of Minsk Peace Agreements, Ukraine's Former President Says14 March, 15:17 GMT,Tunisia’s Ben Ali,On January 14, 2011, President Zine El Abidine Ben Ali’s 24-year reign as Tunisian leader came to an end, with the president and his family fleeing the country to Saudi Arabia after weeks of protests which would hail the start of the so-called ‘Arab Spring’. The ‘Tunisian Revolution’ was driven by long-standing grievances among Tunisians about corruption, high unemployment, inflation, and general poor living conditions, as well as limitations on freedom of speech. The protests were sparked by 26-year-old street vendor Mohamed Bouazizi, who set himself on fire in the street after police confiscated his wares when he failed to pay a bribe, and after his plea for help from the local governor was left unanswered. The young man's act, which would cause over 100 copycat immolation attempts, would spark a month of protests which culminated in Ben Ali’s ouster.,After his ejection, the Tunisian president would live to a ripe old age of 83, passing away in Jeddah, Saudi Arabia in September 2019. But the unrest which his removal sparked would end up transforming much of the Middle East and engulfing some of its countries in crisis which continue to reverberate to this day. In 2011, major protests rocked Algeria and Yemen, and led to the overthrow of the government of Hosni Mubarak in Egypt. In Libya, NATO lent a ‘helping hand’ to anti-government rebels by launching a campaign of airstrikes against forces loyal to Muammar Gaddafi, culminating in his ouster and televised murder, and turning Libya into a failed state. The contagion of the Arab Spring also spread to Syria, which was turned into a breeding ground for jihadist militants who flocked to the country from the region and across the globe to take part in the unsuccessful US, Turkish, Saudi and Qatari-backed campaign to try to oust the government of Bashar Assad.,Ousted Tunisian President Ben Ali Buried in Saudi Arabia - Reports21 September 2019, 17:53 GMT,* An organization subject to United Nations sanctions for terrorist activities.,** A terrorist group outlawed in Russia and many other countries.。相关论文已发表在《行为成瘾杂志》上。

C | 该研究首先要求71名参与者使用Bergen-Facebook成瘾量表对他们使用Facebook的情况进行评分。然后，受试者继续完成爱荷华游戏任务（IGT），这是一个评估决策能力受损程度的经典研究工具。具体方法是向参与者展示四包卡片和四组卡片。每张卡片都显示了获得或损失的金额。要求参与者在其中进行选择，以最大限度地提高收益。正如研究中解释的那样，“参与者还被告知，有些卡片比其他的好，如果他们想做得好，就应该避免坏卡片，选择好卡片。

D | ”研究人员发现，声称自己是Facebook过度用户的参与者在IGT上的表现比他们的同龄人差，他们选择了两张“坏”卡片，提供即时B。但最终导致了损失。在IGT的后一部分，当参与者有足够的时间观察卡片并知道哪些卡片预测了最大的风险时，实验中显示的行为差异具有统计学意义。从额叶脑损伤患者到海洛因依赖者，IGT已被广泛应用于各个研究领域，但作为一种检测社交媒体依赖者的手段，它仍然是一种创新的方法。随着结构研究的不断深入，研究者们可以肯定地将现有的学习物质成瘾的方法论框架应用于社交媒体用户。虽然上述研究范围较窄，但很有意思，为后续研究提供了一些方法。研究人员已经意识到，在理想的研究状态下，研究人员可以观察参与者的社交媒体使用情况，并根据他们的行为而不是他们填写的调查对他们的社交媒体使用情况进行排名。未来的研究也可以更深入地应用于不同社交网络的过度使用用户。