LESSON 12 - QUANTITATIVE RESEARCH DESIGNS: SURVEY, EX POST FACTO & EXPERIMENTAL

Quantitative research is the type of research that collects numerical data. This means that variables are measured quantitatively. The design that enables collection of numerical data are the quantitative research designs. This lesson will discuss quantitative research designs.
A research design is a plan that enables a researcher to determine the methods of sample selection, instruments to use and methods of analyzing data based on whether the approach used is qualitative, quantitative or mixed methods.
There are 3 main quantitative designs: Survey, Ex Post Facto and Experimental. Survey describes the characteristics of a population at a particular time. There are 3 types of survey; Cross sectional survey, Correlational Survey and Longitudinal Survey. Ex Post Facto (or Causal Comparative Research) means 'After the Fact'. This means that the researcher investigates the causes after the effect has been observed on the dependent variable. However, the researcher is not able to manipulate the independent variable. It is similar to correlational survey in that both establishes relationship. However, correlational establishes relationship between variables in a single group while causal comparative establishes relationship between groups. Experimental design is unique because it establishes causality. This means cause and effect relationship. There are two categories of experimental design: True and Quasi Experimental.
As you go through this lesson, check also lesson 8 on correlation to remind yourself on how correlation is measured and interpreted.
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Good stuff. Dr makes research easy

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Great work Daktari.

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Dr. This is great. Simply and Well explained.

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Well explanatory with a satisfactory style

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Great discussion

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[@davidlusweti8498]

This is lesson 12, do we have the first ones, thanks Dr. Lydiah

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Hello David. Yes we have from Lesson 1 where we started with understanding what research is. Lesson 2 was on sources of knowledge, lesson 3 on basic elements of scientific research: concepts, constructs, variables etc. All the lessons are on CZcams

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Thank you

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[@djsanosa829]

what data collection method does ex post facto research use?

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Ex Post Facto is a quantitative research design. It therefore uses quantitative methods of data collection: Questionnaires, schedules, tests and examinations. However, if you combine it with another quantitative method (multi-method) or a qualitative method (mixed-method), then you can combine both quantitative & qualitative measurements