Prática de Shadowing: Evaluation of Obesity Studies | Dr. Wendy Bennett - Aprenda a falar inglês com vídeo

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Hello, my name is Wendy Bennett
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and I'm an associate professor of medicine at the Johns Hopkins University School of Medicine and the School of Public Health.
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Obesity is an enormous public health problem and it affects both children and adults.
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Many of our traditional interventions have focused on the individual's health behaviors like diet and physical activity.
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So the motivation of this project was to understand what are the methods
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that researchers are using in these natural experiment studies on obesity
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so that we can improve our understanding of the types of data sources we're using,
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the data linkages, and the different methods and analytic approaches being used.
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Of the 264 studies we identified,
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53 % of those were natural experiment studies and these again were studies where researchers did not have control over the intervention.
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Most of the studies that we found were conducted in children and in the school setting.
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All of the natural experiment studies used a population -based data source
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and most of them used national level data or state level data.
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Fewer studies had access to looking at community level data.
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Increasingly we find that studies that are assessing physical activity are using accelerometers
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or other types of wearable devices to assess how active people are.
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In the natural experiment studies,
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the most common analytic approach was a cross -sectional comparison where the researchers compared those
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that were exposed to the policy or program
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or built environment change versus those that were not exposed to that change or program or policy.
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So we found that natural experiment studies had overall a high -risk bias,
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and this was mostly due to high losses to follow -up in their studies, as well as high risks of confounding.
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For researchers, we identified several areas where we think that researchers can improve the types of data sources we're using,
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the way we're linking data, and increase the frequency of linking data sources together.
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Policymakers are going to want to use natural experiments
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and evaluations like them to understand whether their policies and programs are effective in reducing obesity as well as preventing obesity.
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Obesity research, this would be very helpful to understand quickly
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which are the studies that are high quality and which are the most effective strategies to reduce obesity and prevent obesity.
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All of this data that we're pulling together can be helpful in future studies
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when we're trying to understand what is most effective in our neighborhoods and communities to impact obesity.

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Vocabulário e dicas de fala para esta lição

Esta aula de conversação usa o vídeo “Evaluation of Obesity Studies”. As palavras que mais se repetem: studies, obesity, experiment, natural, researchers. Este vídeo tem 30 frases e 414 palavras para praticar shadowing. A fala dura 3:00. O falante mantém um ritmo estável de cerca de 138 palavras por minuto, confortável para o shadowing. 85% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.

Vocabulário principal deste vídeo

15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:

PalavraPronúnciaSignificado
obesity substantivo/ə(ʊ)ˈbiːsɪti/obesidade
experiment substantivo/ɪkˈspɛɹ.ə.mənt/experimento, experiência
researcher substantivo/ˈɹiˌsɝ.t͡ʃɚ/pesquisador, pesquisadora
helpful adjetivo/ˈhɛlp.fl̩/prestável, útil
intervention substantivo/ɪntɚˈvɛnʃən/intervenção
assess verbo/əˈsɛs/estimar, avaliar
expose verbo/ɪkˈspoʊz/expor, revelar
compare verbo/kəmˈpɛɚ/comparar
associate substantivo/əˈsoʊʃi.ət/associado
increasingly advérbiocada vez mais
frequency substantivo/ˈfɹiːkwənsi/frequência
versus/ˈvɝsəs/contra, vérsus
fewer/ˈfjuː.ɚ/menos
enormous adjetivo/ɪˈnɔː.məs/enorme, gigante
motivation substantivo/ˈmoʊ.tə.veɪ.ʃən/motivação

Pronúncia para ficar de olho

O falante usa 6 contrações e formas reduzidas, como we're, I'm. Diga-as na forma curta, do jeito que você ouve.

  • Os sons de “sh” e “zh”: intervention /ɪntɚˈvɛnʃən/, associate /əˈsoʊʃi.ət/, motivation /ˈmoʊ.tə.veɪ.ʃən/, evaluation /ɪˌvæljuˈeɪʃn̩/, sectional /ˈsɛkʃənəl/
  • Palavras longas — acerte a sílaba tônica: obesity /ə(ʊ)ˈbiːsɪti/, experiment /ɪkˈspɛɹ.ə.mənt/, intervention /ɪntɚˈvɛnʃən/, associate /əˈsoʊʃi.ət/, motivation /ˈmoʊ.tə.veɪ.ʃən/

Sons difíceis para falantes de português:

  • Consoante final — sem acrescentar um “i” depois: experiment /ɪkˈspɛɹ.ə.mənt/, associate /əˈsoʊʃi.ət/, analytic /ˌænəˈlɪtɪk/, confound /kənˈfaʊnd/

Como praticar com este vídeo

  1. Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
  2. Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
  3. Grave a sua voz e compare com o original, prestando atenção a palavras como obesity, experiment, researcher.

O que é a Técnica de Shadowing?

Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.

Técnica de shadowing: leia o guia completo passo a passo →