Difference between qualitative and quantitative

What is qualitative analysis? What is quantitative analysis? (

Qualitative analysis refers to the analysis and study of the attributes of a certain thing from the qualitative aspect through logical reasoning, philosophical debate, historical evidence, regulations and judgments and other ways of thinking.

It is the specific application of traditional humanities research methods in the field of communication. It is mainly used to study the social structure and function of communication, the social control of communication, and the interrelationship between communication and social development.

Quantitative analysis refers to analyzing the quantitative relationship between the components contained in a studied object or the quantitative relationship between the properties it possesses. Can also be several objects of certain properties, characteristics, interrelationships from the quantitative analysis and comparison.

The main goal is to determine the content of each component in the substance. The theoretical cornerstone of quantitative analysis is positivism, emphasizing the objectivity and observability of physical objects.

Extended information:

The analytical principle of qualitative analysis Qualitative analysis must be completed through a series of tests, if the test results are consistent with the expected, known as a "positive test", or test positive, that is to say, a component in the sample is present; on the contrary, a "negative test" or test negative indicates that a component is present in the sample. On the contrary, a "negative test" or test negative indicates that a component does not exist. Components exist or not based on: the physical characteristics of the substance, such as specific gravity, hardness, flame color, melting point, boiling point, solubility, spectroscopy, refractive index, spinning, etc., and sometimes magnifying glasses or microscopes can be used to obtain important clues to the components of the substance; substances in the start of the chemical reaction, the characteristic color, fluorescence, the emergence of phosphorescence, the production of light and heat, etc.; can also be used in the enzyme's special selective to check out the substance.

Baidu Encyclopedia - Qualitative Analysis Baidu Encyclopedia - Quantitative Analysis.

Difference between qualitative and quantitative research

First, the philosophical foundations of qualitative and quantitative research are different Quantitative research adheres to the viewpoint of positivism, which is a philosophical system based on empirical and exact information as the basis of science.

Therefore, quantitative research emphasizes objectivity, operationalization and generalization in the specific research process, requiring the researcher to take a value-neutral position. Qualitative research is philosophically based on ontology, personal subjective meaning and experience as the main theory of knowledge and value rationality, that the understanding of social phenomena depends on the interaction between the researcher and the object of study, it is difficult to achieve value neutrality.

Qualitative research emphasizes that the social sciences "study conscious or reflective human behavior". Second, qualitative research and quantitative research purposes are different Qualitative research focuses on the subjective feelings of the participants, aims to explain the social phenomena, aims to understand and interpret the object of study as a whole, and focuses on how different people understand the meaning of their lives.

While quantitative research through the measurement of social facts, from which to find social laws, aimed at determining the causal relationship and mutual influence of the object of study, pay more attention to the individual variables and factors and their interrelationships, in order to guide practice. Third, qualitative and quantitative research and research basis and research paths are different Quantitative research is based mainly on the investigation of the reality of the information data, qualitative research is based on a large number of historical facts and life experience materials.

On the research path, quantitative research usually starts from the established theory, puts forward the theoretical assumptions, and then collects empirical evidence through questionnaires and other tools to verify the expected model, assumptions or theories, which is a general to specific, top-down deduction process, highlighting the verification or promotion of the established theory. Qualitative research, on the other hand, is more inclined to a process of creating theories, collecting relevant information through methods such as interviews and cases, focusing on in-depth excavation and grasping of social phenomena, and summarizing the thesis, assertion, or theory from the interconnections between many different pieces of evidence, which is a process of generalization from the individual to the general and from the bottom up.

Fourth, qualitative research and quantitative research are different forms of expression Qualitative research is mainly a narrative description, the findings of the study are mainly textual descriptions. Qualitative research in the form of more flexible, usually contains a variety of research methods.

Quantitative research emphasizes standardized research procedures and pre-design, using numbers or measurements rather than words to describe things or phenomena, mainly through data, patterns, graphs, etc. to illustrate the statistical results and express the conclusions of the study. With the expanding interweaving and integration of different fields of social sciences, and the continuous development of philosophy of science and scientific methodology, there is a trend of compatibility and integration between quantitative and qualitative research.

Especially since the 21st century, the combined use of quantitative and qualitative research has become a new development trend in social science research, and scholars in different research fields have begun to consciously adopt the combined methods in their own research in order to improve the validity and credibility of the research, and to enhance the quality of the research. Our social science research should do a good job of combining qualitative and quantitative research.

May I ask: What is the difference between qualitative and quantitative analysis?

Qualitative - relevant description in textual language

Quantitative - description in mathematical language

Qualitative analysis and quantitative analysis should be unified and complement each other;;; qualitative analysis is the basic prerequisite for quantitative analysis, without qualitative quantitative is a kind of blind, worthless quantitative;; quantitative analysis to make the qualitative more scientific and accurate, it can Promote qualitative analysis to draw broad and in-depth conclusions

Quantitative analysis is based on statistical data, the establishment of mathematical models, and mathematical models to calculate the analysis of the object of each indicator and its value of a method. Qualitative analysis is mainly based on the analyst's intuition, experience, with the object of analysis of the past and present continuation of the situation and the latest information on the nature of the object of analysis, characteristics, development and change of the law to make a judgment of a method. In contrast, the former method is more scientific, but requires more in-depth mathematical knowledge, while the latter method is more crude, but in the data is not enough information or analysts of the mathematical basis of the weaker more applicable, more suitable for general investors and economic workers. Therefore, the analysis done in the following sections of this chapter is basically based on qualitative analysis. However, it must be pointed out that the two methods of analysis of mathematical knowledge requirements, although there is a high and low, but can not be divided into qualitative analysis and quantitative analysis. In fact, modern qualitative analysis methods should also use mathematical tools to calculate, and quantitative analysis must be built on the basis of qualitative prediction, the two complement each other, qualitative is the basis of quantitative, quantitative is qualitative specificity, the combination of the two flexibly used in order to achieve the best results.

Different methods of analysis have their own different characteristics and performance, but all have a **** the same place, that is, they are generally through the comparison of the control to analyze the problem and explain the problem. It is through the comparison of various indicators or the comparison of the same indicators in different periods to reflect the number of how much, the quality of the quality of the high and low efficiency, the size of the consumption, the speed of development and so on, in order to identify, under the judgment of the provision of conclusive and evidence-based information.

Application:

In the evidence of legal research, qualitative analysis and quantitative analysis methods have their own strengths, can complement each other. But because our researchers in evidence jurisprudence are more familiar with qualitative analysis methods, it is necessary to particularly emphasize the function and importance of quantitative analysis methods. For example, we not only want to analyze a certain evidence rule is good or bad, but also to analyze the proportion of its advantages and disadvantages ...... and so on

Patent analysis method is divided into quantitative analysis and qualitative analysis of two kinds. Quantitative analysis that is the external characteristics of the patent literature (patent literature of a variety of entries) in accordance with certain indicators (such as the number of patents) for statistics, and interpretation and analysis of relevant data. Qualitative analysis is the analysis process of taking the content of the patent as the object, grouping the patent documents according to the technical characteristics and making them orderly. Often it is necessary to combine the two to achieve better results.

Definition and Difference between Quantitative Analysis and Qualitative Analysis

Quantitative research is supposed to seek ways to quantitatively represent data, and to use some form of statistical analysis. When considering a new research project, quantitative research is often preceded by appropriate qualitative research. Sometimes qualitative research is also used to interpret the results obtained from quantitative analysis.

Qualitative research is the other main method of exploratory research. The researcher uses qualitative research to define a problem or to find a way to deal with it. When looking for ways to deal with a problem, qualitative research is often used to formulate hypotheses or to identify variables to be included in a study. Sometimes qualitative research and secondary data analysis can form a major part of a research project. Therefore, it is essential for the researcher to master the basic methods of qualitative research.

Chromatography for quantitative and qualitative analysis

A method of separating and analyzing components of a mixture based on the differences in physico-chemical properties of the two phases of the system (e.g., differences in adsorption, partitioning, etc.). Internationally recognized as the founder of chromatography, M.C. Zwitt of Russia. Chromatography system of two phases in relative motion, usually one of the phase is fixed, called the stationary phase; the other phase is mobile, called the mobile phase. In the process of chromatography, the rate of migration of substances depends on their relative forces with the stationary phase and mobile phase. The solute and the attraction of the two phases are intermolecular forces, including dispersion forces, induced effects, inter-field effects, hydrogen bonding forces and Lewis acid-base interactions. For ions, there are also inter-ion electrostatic attractions. The solute that is more strongly attracted to the stationary phase lags behind the solute that is more strongly attracted to the mobile phase, and as the movement is repeated with multiple distributions, the components of the mixture are separated. The classification of chromatography is complex. According to the different mobile phase and stationary phase, chromatography is divided into gas chromatography and liquid chromatography. ① gas chromatography mobile phase is a gas, can be divided into: gas-solid chromatography, the mobile phase is a gas, the stationary phase is solid; gas-liquid chromatography, the mobile phase is a gas, the stationary phase is coated in an inert solid on the liquid. ② liquid chromatography, the mobile phase is liquid, and can be divided into? liquid-solid chromatography, the mobile phase is liquid, stationary phase is solid; ② liquid-liquid chromatography, the mobile phase and stationary phase are liquid. According to the adsorbent and its use form can be divided into column chromatography, paper chromatography and thin layer chromatography. According to the adsorption can be divided into adsorption chromatography, ion exchange chromatography, distribution chromatography and gel permeation chromatography. According to the chromatographic operation termination method can be divided into unfolding chromatography and elution chromatography. According to the injection method can be divided into zone chromatography, head-on chromatography and top-off chromatography. Cannot do qualitative analysis