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行動 vs. 不行動の後悔

セラピーに通う vs. 専門的な助けを求めない

行動した場合

セラピーを受ける

27%

行動しなかった場合

セラピーを受けない

33%

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。


健康

最終確認 2026-06-14

証拠の質 4.25/5

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
5/5
D2 出典の権威性と独立性
4/5
D3 後悔率の正確性
2/5
D4 出典の比較可能性
3/5
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
5/5
平均 4.25/5
Two chairs facing each other across a small table, one side lit, one in shadow.

行動への後悔

セラピーを受ける

27%

セラピー受講者の27%がセラピーは役立たなかったと回答(有用性ベース後悔の代替指標)

セラピーを受けた英国成人、全国代表

遡及的、期間は様々

不作為への後悔

セラピーを受けない

33%

米国成人の非セラピー受診者の約33%が潜在的需要を表明(検討したが求めなかった — 不行動後悔の代替指標)

メンタルヘルスケアを求めたことのない米国成人、全国代表

横断的、2025年4月

この選択を後悔した割合

balanced — ほぼ均衡 — どちらの選択も同程度の後悔を伴います。

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

意思決定に人工知能を活用

この選択を後悔した割合

均衡

ほぼ均衡

family

カップル療法 vs 受けない

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.2倍高い

lifestyle

タトゥー

この選択を後悔した割合

行動が優勢

行動の後悔が1.6倍高い

健康

禁煙

この選択を後悔した割合

不作為が優勢

不作為の後悔が90.0倍高い

健康

精管切除術

この選択を後悔した割合

均衡

ほぼ均衡

健康

依存症治療 vs 回避

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.5倍高い

健康

ボディピアス

この選択を後悔した割合

行動が優勢

行動の後悔が4.0倍高い

健康

治療を求める vs. 依存症を隠す

この選択を後悔した割合

不作為が優勢

不作為の後悔が4.3倍高い

この決断の背後にあるリスク

この選択の根底にある確率。

Among UK adults who have had therapy, 27% did not find it helpful (BACP/YouGov 2025, n=5,150); among US adults who have never sought mental health care, approximately 33% express latent demand — they want care but have not pursued it (APA/Harris Poll 2025, n=1,076). The bilateral comparison is directionally consistent with Gilovich and Medvec’s inaction-dominance model, but the 6-percentage-point gap is computed from incomparable populations — UK therapy-attenders versus US non-attenders — and should not be read as a precise effect size. The pattern is classified as balanced: the signal points toward inaction carrying more regret, but the cross-national measurement gap prevents a stronger directional claim.

The data-quality limitations are layered. The action-side BACP figure is the stronger instrument: a large, nationally representative YouGov survey asking therapy-attenders to assess their own outcomes. Its weakness is framing — “not helpful” captures a broad range of outcomes from genuine harm to mild disappointment, and the 27% unhelpfulness rate sits well above the 5.2% lasting-harm rate found in Crawford et al.’s NHS patient survey (n=14,587), confirming that most of the 27% experienced disappointment rather than lasting damage. The inaction-side rate is a derived figure: 17% of all US adults said they want mental health care but have not sought it, out of 51% who had never sought care, yielding 33% latent demand among non-attenders. Latent demand is prospective (want to go) rather than retrospective (wish I had gone), which likely understates actual regret in older cohorts where the opportunity cost has already accumulated.

Two structural confounders qualify any strong directional claim. First, access barriers make much inaction involuntary: NHS England waiting lists, US insurance gaps, cost, and persistent stigma mean that a share of non-attenders who want care cannot readily obtain it, conflating structural barriers with personal decision regret. Second, cross-national asymmetry in the data — UK for the action side, US for the inaction side — introduces noise because NHS cost-free access and US insurance-dependent access produce different selection effects in who enters therapy and who doesn’t. Within those limits, the data are consistent with the established finding that long-run regret accumulates more on the side of inaction than action, though the effect size here is too small to carry strong causal weight.

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] British Association for Counselling and Psychotherapy / YouGov — BACP Public Perceptions Survey 2025
    BACP Public Perceptions Survey 2025
    統計値
    73% of UK adults who have had therapy found it helpful; 27% did not
    抜粋
    “"More than seven in 10 adults who've had therapy found it helpful (73%) and three quarters (75%) would recommend it to anyone looking for mental health support and to improve their wellbeing." ”
    出典データ
    2025-03-04
    アクセス日
    2026-05-01
    計算過程
    BACP/YouGov 2025 Public Perceptions Survey (n=5,150 UK adults, nationally representative). 73% of therapy-attenders found therapy helpful, implying 27% did not (1 - 0.73 = 0.27). This is used as the action-side regret proxy: therapy-attenders who did not find treatment helpful are the subgroup most likely to regret having attended. "Not helpful" and "regret going" are not the same construct — a person can find therapy emotionally challenging but ultimately beneficial, and a person can find a single course unhelpful without regretting the attempt. The 27% figure likely overstates harm-based regret and understates indifference-based outcomes. D3 score: 3 (real survey measuring helpfulness, a recognized proxy for regret rather than a direct regret instrument). Used as the primary action-side rate because it is the largest nationally representative UK survey measuring therapy outcome from the patient's perspective.
  2. [2] British Journal of Psychiatry / Crawford et al. — Patient experience of negative effects of psychological treatment: results of a national survey 検証済み
    Patient experience of negative effects of psychological treatment: results of a national survey
    統計値
    5.2% of 14,587 NHS psychotherapy patients in England and Wales reported lasting negative effects from their psychological treatment
    抜粋
    “"Of 14,587 respondents who had received psychological treatment, 763 (5.2%) reported experiencing lasting bad effects. Patients treated with cognitive behaviour therapy and psychodynamic psychotherapy were included across 184 different NHS services." ”
    出典データ
    2016-03-01
    アクセス日
    2026-05-02
    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
    Crawford et al. (2016) surveyed 14,587 NHS patients who received psychotherapy across 184 services and found 5.2% reported lasting negative effects. This is the largest published national survey of therapy harm and provides a conservative floor for harm-based regret. The 5.2% rate sits well below the BACP 2025 "not helpful" figure of 27%, confirming that lasting harm is a smaller subcomponent of overall treatment dissatisfaction. This source corroborates that the action-side floor for serious harm-based regret is low. Included as a corroborating peer-reviewed source; the primary action-side rate (0.27) is drawn from the BACP 2025 survey.

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 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] American Psychological Association / The Harris Poll — Public Attitudes Toward Mental Health in the U.S. 検証済み
    Public Attitudes Toward Mental Health in the U.S.
    統計値
    17% of all US adults want mental health care in the future but have not yet sought it; 34% have never sought care and don't want to — yielding 17/(17+34) = 33% latent demand among non-attenders
    抜粋
    “"More adults said they have sought mental health care in the past (45%), and close to 1 in 5 said they want to in the future (17%). Only one-third of adults (34%) said they had never sought professional mental health care and do not want to." Survey of 1,076 U.S. adults ages 18+, conducted online by The Harris Poll in partnership with APA, April 18-21, 2025. ”
    出典データ
    2025-04-21
    アクセス日
    2026-05-01
    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
    APA/Harris Poll 2025 (n=1,076 US adults, nationally representative, April 18-21 2025). The survey identified three mutually exclusive groups: those who sought care in the past (45%), those who want to in the future but haven't (17%), and those who never sought and don't want to (34%). The remaining ~4% are likely currently in care or did not respond. Among non-attenders (17% + 34% = 51% of the sample), 17/51 = 33% express latent demand (want care but haven't sought it). This 33% is used as the inaction-side regret proxy: non-attenders with latent demand are the subgroup most likely to retrospectively regret not having sought help. Construct limitation: "want care in the future" is not equivalent to "regret not having gone already" — latent demand is a forward-looking aspiration, while regret is a backward-looking counterfactual. Access barriers (cost, insurance, availability) mean some latent demand reflects structural obstacles rather than personal decision regret. Cross-national note: this is US data, not UK; the UK setting for the action side has different access structures (NHS, means-tested IAPT waitlists). UK latent demand data were searched across BACP/YouGov, MIND UK, Mental Health Foundation, NHS APMS 2023-24, and Rethink Mental Illness; no comparable nationally representative instrument was found that asked non-attenders directly about latent demand. The APA/Harris estimate (33%) is broadly consistent with UK treatment-gap literature and is used here as the best available nationally representative proxy.

注意事項

Neither side of this entry carries a directly measured regret rate. The action-side 27% (BACP/YouGov 2025, n=5,150 UK adults) measures the fraction of therapy-attenders who did not find therapy helpful — "not helpful" and "regret going" are distinct constructs. A person can find therapy difficult or inconclusive without regretting the attempt, and can find a single course unhelpful while benefiting from later treatment. BACP is a professional association for therapists; its survey was commissioned by a body with a financial stake in therapy uptake, which may bias the "helpful" framing toward positive outcomes. The inaction-side 33% (APA/Harris Poll 2025, n=1,076 US adults) is a derived latent-demand rate: 17% of all US adults want care but haven't sought it, divided by 51% who have never sought care, gives 33% of non-attenders expressing forward-looking demand (the remaining ~4% are likely currently in care or did not respond to that question). Latent demand is not equivalent to backward-looking regret. A meaningful portion of inaction is involuntary: NHS waiting times (England), insurance gaps (US), cost barriers, and persistent stigma all constrain access regardless of the individual's preference. Cross-national asymmetry is a fundamental limitation: the action side uses UK data (BACP/YouGov, Crawford NHS) and the inaction side uses US data (APA/Harris). US insurance-dependent access and NHS cost-free access produce different selection effects in who enters therapy and who doesn't; the 6-percentage-point gap between incomparable populations should not be read as a precise effect size. The gilovich_pattern is therefore classified as balanced rather than inaction_dominates: the directional signal is consistent with Gilovich and Medvec's inaction-dominance model, but the cross-national measurement gap means the delta cannot support a stronger directional claim. Both populations show comparable therapy-uptake rates of approximately 35-45% lifetime. A distinct emerging sub-decision, not captured by either rate above, is using an AI companion or chatbot as an ongoing substitute for human emotional support (separate from human therapy). A 2025 MIT Media Lab and OpenAI study, including a roughly four-week randomized controlled trial of about 1,000 participants, found that higher daily chatbot usage correlated with higher self-reported loneliness, emotional dependence, and problematic use, and with lower real-world socialization. That work measures dependency and loneliness, not a retrospective regret rate, so it cannot be expressed as an action- or inaction-side regret figure and the rates above are unchanged. No nationally representative survey has yet asked AI companion users whether they regret relying on a chatbot in place of human support.

生データ: /api/decisions.json

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