经济学人|如何养成好习惯,改掉坏习惯?
英音听力|BBC & 经济学人等
How to form good habits, and break bad ones
Science and technology - Well informed
科技——见多识广
How can you break a bad habit?
如何改掉坏习惯?
It takes resolution to keep your resolutions.
坚持决心需要坚定的意志。
Did you make any resolutions this new year? If you did, are you keeping to them? Well done if you are. Polling in America suggests half of new-year resolvers give up by the end of March. More rigorous scientific studies confirm that it takes months for a new behaviour to stick, regardless of when you start.
Habitual behaviour emerges in response to dopamine, a chemical associated with pleasure, being produced as a consequence of a certain action. Two brain systems are involved. One, in the basal ganglia (a set of structures deep in the brain's interior), responds automatically and predictably to certain stimuli.
For example, your morning alarm is a stimulus that activates your "getting up" habit. This will include sub-habits such as "shower", "make coffee", "get dressed", "drive to office" and so on, each with their own triggering stimuli and dopamine reward.
The other brain system, which is goal-directed, is located in the cortex, that organ's outer layer. Its dopamine reward comes from a deliberate action being successfully performed. This goal-directed system can, if necessary, override the stimulus-response one. For example, if the radio tells you of a traffic problem, the "drive to office" sub-routine will need conscious modification.
For one-off modifications of habits, this arrangement of routine and override works well. But permanent changes, such as either breaking an old habit or making a new one, are thought to require weakening the stimulus-driven system to reduce the pertinence of old stimuli and strengthening the goal-directed one to increase that of new ones.
In a paper published in January, Eike Buabang and his colleagues at Trinity College, Dublin, review the evidence behind various ways in which this can be done. In practice, most proven approaches seem to operate on the stimulus-response side of the equation.
Deliberate repetition, that stalwart of hopeful resolution-makers, trains the brain so that what was once goal-directed becomes automatic. In the case of driving to work, the incentive to do this is strong (you won't get paid otherwise).
For things more easily abandoned, reinforcement with small rewards (whether the kick of having lost another kilo at your weekly weigh-in or the praise generated by language-learning or fitness apps) works similarly. To break an unwanted habit, on the other hand, consider removing familiar stimuli. Moving house is known to help—though calling in the removal vans is a drastic approach to resolution-keeping.
Why people learn bad habits in the first place remains mysterious. Most habits form precisely because they are helpful. Automatic behaviours, such as those involved in a morning routine, reduce cognitive load and free mental resources for other tasks, such as working out what to say in the ten-o'clock meeting.
But these mechanisms can be subverted. The nicotine inhaled by smoking tobacco—a type of habit so powerful that it has a special name, "addiction"—stimulates dopamine production directly. This is something natural selection could not have foreseen. Non-addictive habits like procrastination are harder to explain.
In the end, though, all this science continues to support the idea that, when it comes to habit-formation, good old-fashioned willpower is the way forward. As the old joke has it: "How many psychoanalysts does it take to change a light bulb? Only one, but the light bulb has to really want to change."
词汇表
resolution [ˌrezəˈluːʃn] 坚定,决心,决定,决议
polling [ˈpəʊlɪŋ] 民意调查,投票
rigorous [ˈrɪɡərəs] 严谨的,严密的;严格的
habitual [həˈbɪtʃuəl] 习惯性的,惯常的,积习难改的
dopamine [ˈdəʊpəmiːn] 多巴胺
basal ganglia [ˈbeɪsl ˈɡæŋɡliə] 基底神经节(大脑中的一组神经核团)
interior [ɪnˈtɪəriə(r)] 内部;内陆;内政;内部的;国内的
automatically [ˌɔːtəˈmætɪkli] 自动地,无意识地,机械地
predictably [prɪˈdɪktəbli] 可预见地,不出所料地
stimuli [ˈstɪmjəlaɪ] 刺激物,刺激,促进因素(stimulus [ˈstɪmjələs] 的复数)
sub- [sʌb] 次要的,下级的,从属的;在…之下(如sub-habit子习惯)
goal-directed [ˈɡəʊl dəˈrektɪd] 目标导向的,有用意的
cortex [ˈkɔːteks] (大脑等器官的)皮层,皮质;树皮
outer layer [ˈaʊtə(r) ˈleɪə(r)] 外层
override [ˌəʊvəˈraɪd] 覆盖;推翻,否决;凌驾于
modification [ˌmɒdɪfɪˈkeɪʃn] 修改,改进,改变
one-off [ˌwʌn ˈɒf] 一次性的;一次性事件
permanent [ˈpɜːmənənt] 永久的,永恒的,长久的
pertinence [ˈpɜːtɪnəns] 相关性,针对性
Trinity College, Dublin [ˈtrɪnəti ˈkɒlɪdʒ, ˈdʌblɪn] 都柏林圣三一学院(爱尔兰最古老的大学)
equation [ɪˈkweɪʒn] 反应式,机制;方程式,等式
stalwart [ˈstɔːlwət] 忠实的,可靠的;忠实拥护者,坚定分子
incentive [ɪnˈsentɪv] 激励,刺激,动机
reinforcement [ˌriːɪnˈfɔːsmənt] 加强,强化,巩固
kick [kɪk] 极度的快感(或刺激),极大的乐趣
weigh-in [ˈweɪ ɪn](拳击等比赛前的)称体重
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