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For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
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Today, scientists agree that good research is ethical in nature and is guided by a basic respect for human dignity and safety. However, this has not always been the case. Modern researchers must demonstrate that the research they perform is ethically sound.
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Humanistic psychology emerged in the mid-20th century as a response to the deterministic and pessimistic nature of behaviorism and psychoanalysis. While behaviorism focused on observable behaviors influenced by the environment and psychoanalysis delved into unconscious motivations, both theories suggested that human actions lacked free will. In contrast, humanistic psychology offers a perspective that emphasizes the innate potential for goodness and growth within every individual.
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According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
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In the case of systematic errors, the sources can be identified, and the errors can be subsequently minimized by addressing these sources. According to the source, systematic errors can be divided into sampling, instrumental, methodological, and personal errors.
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Updated: Sep 9, 2025

Enactive Phenomenological Approach to the Trier Social Stress Test: A Mixed Methods Point of View
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Repensar la reflexividad, la replicabilidad y el rigor en la investigación cualitativa

Qin Xiang Ng1, Kevin Xiang Zhou2

  • 1Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore ng.qin.xiang@u.nus.edu.

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La definición de la calidad en la investigación cualitativa requiere más de un marco único. La investigación cualitativa rigurosa es profundamente reflexiva, contextualizada y transparente sobre sus métodos interpretativos.

Palabras clave:
Investigación cualitativaMedicina narrativa

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Área de la Ciencia:

  • Ciencias sociales
  • Metodología de la investigación cualitativa

Sus antecedentes:

  • Las propuestas recientes sugieren un marco singular para definir la calidad en la investigación cualitativa.
  • Este comentario se involucra con los debates históricos y en curso en la metodología cualitativa.

Objetivo del estudio:

  • Reexaminar las propuestas de un marco unificador para la calidad de la investigación cualitativa.
  • Resaltar las tensiones entre el rigor procesal y los enfoques interpretativos en la investigación cualitativa.

Principales métodos:

  • Justaposición de las diferentes tradiciones de investigación cualitativa.
  • Análisis de los debates históricos y contemporáneos en metodología cualitativa.

Principales resultados:

  • La calidad en la investigación cualitativa no se puede reducir a una sola métrica o regla universal.
  • Los enfoques reflexivos favorecen el compromiso situacional y evolutivo con el significado sobre los marcos rígidos.

Conclusiones:

  • Los investigadores deben alinear los criterios metodológicos con sus compromisos epistemológicos.
  • La investigación cualitativa es rigurosa cuando es reflexiva, contextualizada y transparente sobre la interpretación.