EigoPro 1級読解 — The Tyranny of the Single Score

Few measures in psychology have proved as durable, or as divisive, as the intelligence quotient. Its appeal lies in a seductive parsimony: distil the sprawling, multifarious business of human thought into one tidy integer, and you possess an instrument that predicts, with unsettling regularity, scholastic attainment, occupational status, and even longevity. Defenders point to the statistical phenomenon of the positive manifold—the stubborn tendency for performance across heterogeneous cognitive tasks to correlate—and infer the existence of a general factor, g, underlying them all. That the number captures something real is scarcely in dispute; only the credulous would deny that some people grasp abstractions more swiftly than others, or that this facility, once measured, tends to persist across a lifetime. Yet to mistake the measure for the thing measured is to commit a fallacy as old as quantification itself. IQ is a statistical abstraction, a ranking relative to a population, not a substance lodged in the skull. A score of one hundred denotes nothing intrinsic; it merely announces that one has performed exactly at the median of whatever sample happened to define the scale. The positive manifold may reflect not a single faculty but the convergence of many—working memory, processing speed, accumulated knowledge—each developmentally entangled with schooling, nutrition, and culture. To reify g, to treat a factor extracted by analysis as a tangible quantity awaiting discovery, is to invert the logic of inference, mistaking a convenient summary for a hidden cause. The gravest cost, however, is neither technical nor philosophical but moral. A single score invites ranking, and ranking invites the inference that those ranked low are inherently, immutably lesser. History furnishes grim testimony: the instrument forged to identify children needing help was swiftly conscripted to justify exclusion, sterilisation, and segregation. The richness of cognition—creativity, practical wisdom, the capacity to reframe a problem entirely, the patience to dwell with ambiguity—dissolves under a metric calibrated to a narrow band of analytic skill. To honour the figure is not to worship it. The number is not false; it is merely impoverished, and we forget that distinction at our peril.

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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

1級 · 読解 · 全5問

問 1

Which statement best captures the central argument of the passage?

Creativity and practical wisdom can be measured precisely if researchers expand IQ tests to include additional analytic tasks.
IQ measures something genuine but a single score dangerously oversimplifies the complexity of human cognition and invites moral abuse.
IQ is a statistical fiction with no predictive value, and its continued use cannot be justified on any grounds.
The positive manifold conclusively proves the existence of a unitary general intelligence located within the brain.

Phrase

The number is not false; it is merely impoverished

1級読解主旨把握論旨

⚡ひとことで

筆者は IQ が何か実在するものを測る点は認めつつ、単一の数値が認知の豊かさを矮小化し道徳的悪用を招くと論じる。

選択肢の解説Choice Analysis

「IQ measures something genuine but a single score dangerously oversimplifies the complexity of human cognition and invites moral abuse.」

正解

筆者は冒頭で「That the number captures something real is scarcely in dispute」と IQ の実在性を認める一方、最終段で「The number is not false; it is merely impoverished」と述べ、単一スコアが認知の豊かさを溶かし道徳的悪用を招くと警告している。実在性の承認と矮小化への批判の両立こそが論旨の核心である。したがってこの選択肢が最も適切。

「IQ is a statistical fiction with no predictive value, and its continued use cannot be justified on any grounds.」
= IQ は予測力のない統計的虚構で正当化不能とする ━ 筆者は学業成績・職業地位・寿命を「unsettling regularity」で予測すると認めており全面否定とは矛盾する。
「The positive manifold conclusively proves the existence of a unitary general intelligence located within the brain.」
= 正の多様体が単一の一般知能の脳内実在を証明するとする ━ 筆者は g を reify することを「invert the logic of inference」と明確に批判している。
「Creativity and practical wisdom can be measured precisely if researchers expand IQ tests to include additional analytic tasks.」
= 分析課題を増やせば創造性も精密に測れるとする ━ 筆者は創造性などが narrow band の指標の下で「dissolves」すると述べ測定拡張に否定的。

▦Collocation

パターン	意味	例
capture something real	何か実在するものを捉える	Critics concede the test may capture something real about ability.
a single score	単一のスコア	Reducing a person to a single score erases crucial nuance.
invite the inference	推論を招く	Low rankings invite the inference of permanent inferiority.
at our peril	危険を冒して・軽視すれば痛い目を見る	We ignore that distinction at our peril.
dissolve under a metric	指標の下で溶けて消える	Rich human qualities dissolve under a narrow metric.

❝例文

The summary captures the essence of a long debate in one sentence.
その要約は長い論争の本質を一文で捉えている。
He was reduced to a single score on an application form.
彼は願書上で単一のスコアに還元された。
Such complacency invites disaster.
そのような自己満足は破滅を招く。
Investors who ignore inflation do so at their peril.
インフレを軽視する投資家は痛い目を見る。

💡Tip · 覚えるコツ

主旨設問では、筆者が 譲歩 (concession) と 主張 (claim) を同時に述べる「二段構え」を見抜くと正解しやすい。

問 2

According to the passage, what does the "positive manifold" refer to?

The persistent tendency for performance on diverse cognitive tasks to correlate with one another.
The historical practice of ranking children to decide who needs educational help.
A measure of how strongly IQ predicts longevity within a given population.
A single physical substance located in the brain that produces intelligent behaviour.

Phrase

the stubborn tendency for performance across heterogeneous cognitive tasks to correlate

1級読解詳細把握

⚡ひとことで

正の多様体とは、異質な認知課題間で成績が相関する頑強な傾向を指す統計現象である。

選択肢の解説Choice Analysis

「The persistent tendency for performance on diverse cognitive tasks to correlate with one another.」

正解

本文は positive manifold を「the stubborn tendency for performance across heterogeneous cognitive tasks to correlate」と定義している。これは異なる課題の成績が互いに相関するという統計的傾向であり、擁護派はここから g の存在を推論する。よって課題間相関を述べた選択肢が正しい。

「A single physical substance located in the brain that produces intelligent behaviour.」
= 知的行動を生む脳内の単一物質とする ━ 筆者は g を「not a substance lodged in the skull」と明言し物質説を否定する。
「The historical practice of ranking children to decide who needs educational help.」
= 支援すべき児童を選別する歴史的慣行とする ━ これは第3段の道徳的議論の話で positive manifold の定義ではない。
「A measure of how strongly IQ predicts longevity within a given population.」
= IQ が寿命を予測する強さの尺度とする ━ 寿命予測は IQ の予測力の例で、positive manifold の定義そのものではない。

▦Collocation

パターン	意味	例
tendency to correlate	相関する傾向	Researchers noted a tendency for scores to correlate.
across heterogeneous tasks	異質な課題にわたって	Performance held steady across heterogeneous tasks.
infer the existence of	存在を推論する	From the data they infer the existence of a common factor.
underlying them all	それら全ての根底にある	They posit a factor underlying them all.
scarcely in dispute	ほとんど議論の余地がない	That ability varies is scarcely in dispute.

❝例文

The two variables tend to correlate strongly in large samples.
その二変数は大標本で強く相関する傾向がある。
The study covered a heterogeneous group of participants.
その研究は異質な参加者集団を対象にした。
From the footprints we infer the existence of a predator.
足跡から捕食者の存在を推論する。
A hidden mechanism may be underlying them all.
隠れた機構がそれら全ての根底にあるのかもしれない。

💡Tip · 覚えるコツ

詳細設問は本文の 定義文("the ... tendency ... to ...")をそのまま言い換えた選択肢を選ぶのが鉄則。

問 3

What does the passage say about the historical use of the intelligence test?

The test reliably identified creative and practically wise individuals across many cultures.
The test was abandoned once its potential for moral abuse became widely recognised.
A tool originally made to identify children needing help was later used to justify exclusion and sterilisation.
The test was designed from the outset as an instrument of social segregation and racial policy.

Phrase

the instrument forged to identify children needing help was swiftly conscripted to justify exclusion

1級読解詳細把握

⚡ひとことで

援助が必要な児童を特定するために作られた道具が、後に排除・断種・隔離の正当化に転用されたと述べる。

選択肢の解説Choice Analysis

「A tool originally made to identify children needing help was later used to justify exclusion and sterilisation.」

正解

本文は「the instrument forged to identify children needing help was swiftly conscripted to justify exclusion, sterilisation, and segregation」と述べる。すなわち本来は支援目的で作られた道具が悪用された、という転用の歴史を指摘している。したがって支援目的から悪用への転換を述べた選択肢が正しい。

「The test was designed from the outset as an instrument of social segregation and racial policy.」
= 最初から社会的隔離・人種政策の道具として設計されたとする ━ 本文は forged to identify children needing help と当初目的が支援だったと明記する。
「The test was abandoned once its potential for moral abuse became widely recognised.」
= 悪用が認識された後にテストは廃止されたとする ━ 本文に廃止の記述はなく、むしろ durable(永続的)と述べている。
「The test reliably identified creative and practically wise individuals across many cultures.」
= 多文化で創造的・実践的な人物を確実に特定したとする ━ 本文は創造性が指標の下で dissolves すると述べ逆の主張。

▦Collocation

パターン	意味	例
forge an instrument	道具を作り上げる	Binet forged an instrument to aid struggling pupils.
be conscripted to	〜に転用される・徴用される	The data were conscripted to justify policy.
justify exclusion	排除を正当化する	No statistic can justify exclusion of the vulnerable.
furnish testimony	証言を提供する	History furnishes ample testimony of such abuse.
swiftly conscripted	素早く転用される	A benign tool was swiftly conscripted for harm.

❝例文

The charity was forged in a time of crisis.
その慈善団体は危機の時代に作り上げられた。
Civilians were conscripted to dig trenches.
民間人が塹壕掘りに徴用された。
He could not justify exclusion of the newcomers.
彼は新参者の排除を正当化できなかった。
The archive furnishes testimony of the era.
その文書館はその時代の証言を提供する。

💡Tip · 覚えるコツ

"forged to ... was conscripted to ..." の構文は 当初目的 → 転用 の対比。設問はこの転換を捉えているかを問う。

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この単元の講義を見る 1級の単元一覧 1級の用語集

EigoPro 1級 読解 — The Tyranny of the Single Score

この単元の問題を3問、解説つきで公開しています

The number is not false; it is merely impoverished

the stubborn tendency for performance across heterogeneous cognitive tasks to correlate

the instrument forged to identify children needing help was swiftly conscripted to justify exclusion

EigoPro 1級読解 — The Tyranny of the Single Score