EigoPro 準1級 読解 — The Science of Habit

Roughly forty per cent of the actions we perform each day are not decisions at all, but habits—behaviours so deeply rehearsed that they unfold with little conscious thought. Neuroscientists trace this automaticity to the basal ganglia, an ancient structure buried beneath the cortex that stores routines as compact loops. Once a behaviour is consigned to this region, the deliberative parts of the brain fall quiet, conserving the mental energy that conscious choice would otherwise consume. The arrangement is elegantly efficient, yet it carries an obvious cost: a habit, once established, runs whether or not it still serves us. Researchers describe each habit as a three-part loop. A cue—a time of day, a location, an emotional state—triggers the behaviour; a routine follows; and a reward, however modest, reinforces the loop so that the brain learns to crave it. The crucial insight is that the cue and the reward tend to remain stable while the routine is comparatively malleable. This is why the most reliable strategy for change is not to suppress an unwanted habit through willpower—an approach that fails with monotonous regularity—but to keep its cue and reward intact and substitute a new routine in the middle. What such accounts often obscure is the role of context. Studies of people who relocate or change jobs reveal that habits are remarkably easy to break in the weeks after the surrounding environment shifts, precisely because the familiar cues have vanished. The implication is sobering for anyone who relies on resolve alone: the will is a feeble lever compared with circumstance. To remake a habit, it is often wiser to engineer one's environment—removing temptations, rearranging a kitchen, altering a commute—than to wrestle with the behaviour head-on. The self we wish to become, in other words, is built less from grand intentions than from the quiet architecture of our daily surroundings.

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この単元の問題を3問、解説つきで公開しています

準1級 · 読解 · 全5問

問 1

What is the main idea of the passage?

  • Habits are entirely beneficial because they conserve the brain's mental energy.
  • Habits are automatic brain routines best changed by altering their cues, rewards, and surrounding context rather than by willpower.
  • Willpower is the single most effective tool for breaking unwanted habits.
  • The basal ganglia should be surgically targeted to eliminate harmful behaviours.
Phrase

it is often wiser to engineer one's environment ... than to wrestle with the behaviour head-on

準1級読解心理神経科学主旨把握
⚡ひとことで

本文の論旨は「習慣は自動化された脳のループであり、意志でなく合図・報酬・環境を操作して変えるのが賢い」。

選択肢の解説Choice Analysis

「Habits are automatic brain routines best changed by altering their cues, rewards, and surrounding context rather than by willpower.」

正解

本文は (1) 習慣=自動化された脳のループ (basal ganglia)→ (2) cue-routine-reward の3部構成で routine だけが malleable→ (3) さらに環境 (context) が鍵で『意志は状況に比べ貧弱な梃子』と展開する。よって『習慣は自動的な脳のルーティンであり、意志よりも合図・報酬・周囲の文脈を変えることで最もよく変えられる』が主旨。

  • 「entirely beneficial」

    = 習慣は完全に有益 ━ 本文は efficient だが『it still serves us か否かに関わらず走る』という cost を明言しており『完全に有益』は言い過ぎ。

  • 「Sheer willpower on its own is by far and away the single most effective tool for breaking any unwanted habits.」

    = 意志こそ最も効果的 ━ 本文は willpower 依存は『単調なほど失敗する』『貧弱な梃子』と否定しており正反対。

  • 「surgically targeted」

    = 外科的に basal ganglia を狙う ━ 外科手術の話は本文に一切ない。

▦Collocation
パターン意味例
unfold with little conscious thoughtほとんど無意識に進行するHabits unfold with little conscious thought.
be consigned to ~~に委ねられるconsigned to the basal ganglia
serve us役に立つwhether or not it still serves us
wrestle with ~ head-on~に正面から取り組むwrestle with the behaviour head-on
engineer one's environment環境を設計するengineer one's environment
❝例文

  • Many of our daily actions unfold with little conscious thought.

    日々の行動の多くはほとんど無意識に進行する。

  • It is wiser to engineer your environment than to rely on willpower.

    意志に頼るより環境を設計する方が賢い。

  • A habit runs whether or not it still serves us.

    習慣は役に立つかどうかに関わらず走り続ける。

💡Tip · 覚えるコツ

主旨設問は最終段の結論文 (The self we wish to become ... is built ... from the quiet architecture of our daily surroundings) を探すと速い。『完全に〜』『〜こそ唯一』など極端な選択肢は本文の but/yet 逆接と矛盾しやすい。

問 2

According to the passage, what happens in the brain once a behaviour becomes a habit?

  • The basal ganglia shut down and the cortex takes full control.
  • The behaviour can no longer be performed without conscious attention.
  • The brain consumes more energy than it would for a conscious choice.
  • The deliberative regions of the brain become less active, saving the energy that conscious decisions would require.
Phrase

the deliberative parts of the brain fall quiet, conserving the mental energy that conscious choice would otherwise consume

準1級読解心理神経科学詳細把握
⚡ひとことで

習慣化されると熟慮を担う脳部位が静まり、意識的選択が使うはずのエネルギーを節約する。

選択肢の解説Choice Analysis

「The deliberative regions of the brain become less active, saving the energy that conscious decisions would require.」

正解

第1段で『行動が basal ganglia に委ねられると、脳の熟慮を担う部分が静まり (fall quiet)、意識的選択が消費するはずの精神的エネルギーを節約する』と述べる。これを言い換えた『熟慮を担う脳領域の活動が低下し、意識的決定が要するエネルギーを節約する』が正解。

  • 「basal ganglia shut down」

    = basal ganglia が停止し皮質が支配 ━ 逆。ループを動かすのは basal ganglia であり、静まるのは熟慮を担う (cortical) 部分。

  • 「The brain ends up consuming a great deal more energy than it would for a fully conscious choice.」

    = より多くのエネルギーを消費 ━ 本文は energy を『節約する (conserving)』と述べており正反対。

  • 「The behaviour can no longer be performed at all without a great deal of deliberate conscious attention.」

    = 意識なしには遂行できなくなる ━ 習慣はむしろ意識なしに自動で走る (automaticity) ので逆。

▦Collocation
パターン意味例
fall quiet静まるThe deliberative parts fall quiet.
conserve energyエネルギーを節約するconserving the mental energy
would otherwise Vさもなければ~するだろうenergy choice would otherwise consume
be buried beneath ~~の下に埋もれているburied beneath the cortex
store ~ as loops~をループとして蓄えるstores routines as compact loops
❝例文

  • Automatic routines conserve mental energy.

    自動化したルーティンは精神的エネルギーを節約する。

  • The deliberative parts of the brain fall quiet during habits.

    習慣の最中、脳の熟慮を担う部分は静まる。

  • Conscious choice would otherwise consume that energy.

    さもなければ意識的選択がそのエネルギーを消費するだろう。

💡Tip · 覚えるコツ

detail 設問は本文語を別語に置換した肢が正解 (fall quiet→become less active, conserving→saving)。主体の取り違え (basal ganglia ⇔ deliberative parts) を狙った逆転肢に注意。

問 3

Why does the author say habits are easy to break after someone relocates or changes jobs?

  • People develop stronger willpower whenever their circumstances change.
  • New rewards automatically replace the old ones during such transitions.
  • Moving permanently weakens the basal ganglia where routines are stored.
  • The familiar cues that normally trigger the habits have disappeared along with the old environment.
Phrase

habits are remarkably easy to break in the weeks after the surrounding environment shifts, precisely because the familiar cues have vanished

準1級読解心理神経科学詳細把握
⚡ひとことで

転居・転職後は『見慣れた合図が消える』ため習慣が崩れやすい。

選択肢の解説Choice Analysis

「The familiar cues that normally trigger the habits have disappeared along with the old environment.」

正解

第3段で『環境が変わった後の数週間は習慣が著しく崩れやすい、それはまさに見慣れた合図 (familiar cues) が消えた (vanished) からだ』と説明する。cue が引き金 (trigger) であることは第2段で定義済みなので、『習慣を引き起こす見慣れた合図が旧環境とともに消えた』が正解。

  • 「weakens the basal ganglia」

    = basal ganglia を弱める ━ 転居が脳構造を弱めるという記述はない。消えるのは外的な cue。

  • 「People develop a great deal more willpower whenever their own circumstances change at all.」

    = 意志が強まる ━ 本文は逆に意志を『貧弱な梃子』とし、変化の要因を環境に帰している。

  • 「New rewards automatically replace」

    = 新しい報酬が自動的に置き換わる ━ 報酬の置換ではなく合図の消失が理由。報酬は安定的と述べられている。

▦Collocation
パターン意味例
the environment shifts環境が変わるafter the surrounding environment shifts
familiar cues vanish見慣れた合図が消えるthe familiar cues have vanished
trigger a behaviour行動を引き起こすA cue triggers the behaviour.
precisely because ~まさに~だからこそprecisely because the cues are gone
be easy to break崩しやすいhabits are easy to break
❝例文

  • Moving house makes old habits easy to break.

    引っ越しは古い習慣を崩しやすくする。

  • The familiar cues had vanished after the move.

    引っ越し後、見慣れた合図は消えていた。

  • A cue triggers the routine that follows.

    合図が、続くルーティンを引き起こす。

💡Tip · 覚えるコツ

別段落の detail は『なぜ (why) → because 節』を直接探す。第2段の cue 定義と第3段の cue 消失をつなぐと因果が見える。

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