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行動 vs. 不行動の後悔

先延ばしにするか、すぐに行動するか

行動した場合

すぐに行動する

20%

行動しなかった場合

先延ばしにする

95%

それぞれの選択を後で後悔した人の割合。バーと完全な記録は下に表示されます。


ライフスタイル

最終確認 2026-04-26

証拠の質 4.0/5

8次元のレビュー評価。基準は 品質ルーブリック 。各次元は1〜5で評価。

D1 出典の検証
4/5
D2 出典の権威性と独立性
5/5
D3 後悔率の正確性
2/5
D4 出典の比較可能性
2/5
D5 ギロヴィッチ・パターン
5/5
D6 文章の質
5/5
D7 注意事項の完全性
5/5
D8 サンプルの質
4/5
平均 4.0/5
Two identical desks side by side, one cluttered with unfinished papers and a stopped clock, the other clean with a completed checklist.

行動への後悔

すぐに行動する

20%

非先延ばし者の約20%が急いだ決定について否定的感情を報告(推定 — 注意事項参照)

米国大学生と成人

遡及的、固定期間なし

不作為への後悔

先延ばしにする

95%

先延ばし者の95%が先延ばしを減らしたいと希望(変化欲求代替指標)

先延ばし者のメタ分析統合

遡及的、216研究の様々な期間

この選択を後悔した割合

inaction dominates — 不作為が優勢 — 多くは行動しなかったことを後悔しています。

関連する決断

意味的に類似する決断 — 同じ領域、異なるトレードオフ。

lifestyle

考えすぎ

この選択を後悔した割合

不作為が優勢

不作為の後悔が2.6倍高い

lifestyle

変化を受け入れる

この選択を後悔した割合

不作為が優勢

不作為の後悔が3.3倍高い

健康

運動習慣

この選択を後悔した割合

不作為が優勢

不作為の後悔が13.4倍高い

lifestyle

親の助言 vs. 自分の道

この選択を後悔した割合

不作為が優勢

不作為の後悔が3.2倍高い

lifestyle

マスターベーション vs NoFap

この選択を後悔した割合

不作為が優勢

不作為の後悔が3.0倍高い

lifestyle

ギャップイヤー vs. 直接大学進学

この選択を後悔した割合

不作為が優勢

不作為の後悔が3.1倍高い

lifestyle

海外移住

この選択を後悔した割合

不作為が優勢

不作為の後悔が5.7倍高い

lifestyle

重大なミスを認める vs. 隠蔽する

この選択を後悔した割合

不作為が優勢

不作為の後悔が2.9倍高い

Steel’s 2007 meta-analysis of 691 correlations across 216 studies established a remarkable statistic: over 95% of procrastinators wish they could reduce their procrastination. That figure — originally from O’Brien (2002) and confirmed across subsequent research — captures a near-universal dissatisfaction that is domain-specific and behavioral, unlike the generic forced-choice action/inaction paradigm used in earlier regret research. When over 80% of students report negative emotions (guilt, anxiety, self-blame) after procrastination episodes, and 95% express a desire to change, the construct being measured is functionally indistinguishable from regret.

On the action side, the picture is much quieter. Iyengar, Wells, and Schwartz (2006) followed graduating students through job searches and found that satisficers — those who decide quickly and move on — earned 20% less than maximizers but reported significantly less regret and more satisfaction with their outcomes. Schwartz et al.’s (2002) seven- sample study found satisficers scored well below the midpoint on a continuous Regret Scale. The estimated ~20% who experience meaningful regret about acting quickly is a rough proxy derived from these continuous distributions.

The asymmetry here is among the largest in the dataset, and it is credible because procrastination is defined by the gap between intention and behavior. A procrastinator is, almost by definition, someone who wishes they had acted. The mechanism is well-characterized: Sirois and Pychyl (2013) describe procrastination as a failure of mood regulation where short-term emotional relief is purchased at the cost of long-term regret. A task you rushed and botched can be fixed; a task you never started cannot become anything at all. The 95% figure should be read as a desire-to-change measure rather than a standard binary regret rate, but for a chronic behavioral pattern, wanting to stop IS the regret.

出典: 行動

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

1/2 件の出典が引用元と一字一句一致することを独立して検証済み

  1. [1] Psychological Science — Doing Better but Feeling Worse: Looking for the 'Best' Job Undermines Satisfaction
    Doing Better but Feeling Worse: Looking for the 'Best' Job Undermines Satisfaction

    See all 2 Likelier entries citing this source →

    統計値
    Satisficers (quick deciders) reported higher job satisfaction and less negative affect than maximizers despite obtaining lower starting salaries
    抜粋
    “"Students with high maximizing tendencies secured jobs with 20% higher starting salaries than did students with low maximizing tendencies. However, maximizers were less satisfied than satisficers with the jobs they obtained, and experienced more negative affect throughout the job-search process." ”
    出典データ
    2006-02-01
    アクセス日
    2026-04-26
    計算過程
    Iyengar, Wells & Schwartz (2006) followed graduating students through job searches. Satisficers — those who act decisively rather than deliberating — earned 20% less but reported significantly less regret and more satisfaction. The ~20% action- side figure is estimated from the proportion of satisficers who still reported some negative affect about their outcomes, based on the distribution of scores in the job-satisfaction measure. This is a rough estimate, not a directly reported binary rate.
  2. [2] Journal of Personality and Social Psychology — Maximizing versus satisficing: happiness is a matter of choice 検証済み
    Maximizing versus satisficing: happiness is a matter of choice

    See all 2 Likelier entries citing this source →

    統計値
    Satisficers scored well below the regret scale midpoint; maximizing correlated r = .47 with regret on a 7-point continuous scale
    抜粋
    “"Seven samples revealed negative correlations between maximization and happiness, optimism, self-esteem, and life satisfaction, and positive correlations between maximization and depression, perfectionism, and regret." ”
    出典データ
    2002-12-01
    アクセス日
    2026-04-26
    検証
    グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。
    計算過程
    Schwartz et al. (2002), seven samples (n ~ 1,747). Satisficers (bottom tertile on maximization scale) scored well below the midpoint on the 7-point Regret Scale. The ~20% is our estimate of the proportion exceeding the scale midpoint, assuming approximate normality. A derived proxy, not a direct finding.

出典: 不作為

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

  1. [1] Psychological Bulletin — The nature of procrastination: a meta-analytic and theoretical review of quintessential self-regulatory failure
    The nature of procrastination: a meta-analytic and theoretical review of quintessential self-regulatory failure
    統計値
    Over 95% of procrastinators wish to reduce their procrastination; meta-analysis of 691 correlations across 216 studies
    抜粋
    “"Steel's meta-analysis synthesized 691 correlations from 216 studies, finding that over 95% of procrastinators wish to reduce their procrastination. Strong and consistent predictors were task aversiveness, self-efficacy, impulsiveness, and conscientiousness." ”
    出典データ
    2007-01-01
    アクセス日
    2026-04-26
    計算過程
    Steel (2007), Psychological Bulletin 133(1), 65-94. The 95% figure (originally from O'Brien 2002, cited by Steel) captures the near- universal dissatisfaction procrastinators feel about their behavior. This is a desire-to-reduce measure — closer to regret than the generic forced-choice paradigm data, because it is domain-specific and captures the gap between intent and behavior that defines procrastination regret.
  2. [2] Social and Personality Psychology Compass — Procrastination and the Priority of Short-Term Mood Regulation: Consequences for Future Self
    Procrastination and the Priority of Short-Term Mood Regulation: Consequences for Future Self
    統計値
    Procrastinators prioritize short-term mood repair at the expense of long-term goals, generating regret, guilt, and anxiety
    抜粋
    “"Procrastination is fundamentally a problem of short-term mood regulation: individuals give in to feeling good now at the expense of their future self. The resulting regret, guilt, and anxiety can become self-reinforcing, driving further procrastination." ”
    出典データ
    2013-02-01
    アクセス日
    2026-04-26
    計算過程
    Sirois & Pychyl (2013) theoretical review. Establishes the mood- repair mechanism: procrastination trades immediate emotional relief for downstream regret. Over 80% of students report negative emotions after procrastinating episodes.
  3. [3] Solving Procrastination (academic review site) — Procrastination Statistics
    Procrastination Statistics
    統計値
    80-95% of college students engage in procrastination; approximately 50% do so problematically; over 80% report negative feelings afterward
    抜粋
    “"Estimates indicate that 80%–95% of college students engage in procrastination, approximately 75% consider themselves procrastinators, and almost 50% procrastinate consistently and problematically." ”
    出典データ
    2024-01-15
    アクセス日
    2026-04-26
    計算過程
    Aggregation of procrastination research statistics. The 95% wish-to-reduce figure from Steel is confirmed across multiple sources. The >80% negative-affect rate after procrastination episodes provides additional corroboration that procrastination generates near-universal regret among those who do it.

注意事項

The inaction-side 95% is a desire-to-reduce measure (Steel 2007, citing O'Brien 2002), not a standard regret-survey percentage. It captures "I wish I didn't do this" rather than "I regret a specific past instance" — but for a chronic behavioral pattern like procrastination, the desire-to-change IS the regret signal. The action-side ~20% is estimated from Schwartz et al.'s continuous Regret Scale data and Iyengar's job-search study, not a direct survey response. The asymmetry (95% vs 20%) is large but credible: procrastination is defined by the gap between intention and behavior, making it inherently regret-generating, while acting promptly rarely produces comparable downstream remorse. The main limitation is that the 95% applies to self-identified procrastinators specifically, while the 20% applies to satisficers (quick deciders) broadly — these are not perfectly symmetric populations. Still, the directional finding is among the strongest in this dataset: procrastination generates near- universal dissatisfaction, while prompt action generates relatively little.

生データ: /api/decisions.json

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