LESSON 3 - METHODS OF DATA COLLECTION

Data Collection

In order to have accurate data, the research must know the right sources and right way of collecting and presenting them

Primary Data

Collected from an original source of data

Surveys & Questionnaires

Interviews

Observations

Experiments & Tests

Methods in Primary data

Secondary Data

Collected from published or unpublished source of data

Electronic Health Records (EHR)

Medical Journals & Research Papers

Hospital Databases

Government & Public Health Reports

Methods in Secondary data

Interview Method

-this is a direct way or personal contact with the primary source of data

-series of well-planned questions are asked to the person (subject of the study)

Questionnaire Method

-this is an indirect way of collecting data that may done online or through paper distributed to the respondents of the study

-convenient but no guarantee that respondents will answer honestly and return the questionnaire

Registration Method

gathering is done from concerned offices

Observation Method

this is done purely based on the use of senses

Experimental Method

-gathering is done thru experimentation

-looking into the cause and effect relationships of a certain parameter or event under a controlled condition

this is commonly used in the field of science

Reliability

-it implies consistency

-the degree to which an assessment tool produces stable and consistent results

Validity

-when it measures what is intended to be measured

-refers to how well a test measures what it is supposed to measure

TRUE

TRUE OR FALSE.

For a test to be RELIABLE, it also needs to be VALID.

Accuracy

how close to the target value

Precision

closeness of the values to each other

Simple Random Sampling

Systematic Random Sampling

Purposive Sampling

Quota Sampling

Convenience Sampling

Types of Sampling techniques

Simple Random Sampling

equal chances of being chosen to be included in the study

Systematic Random Sampling

population is divided in different classes and each class must be presented in the study

Purposive Sampling

the samples were chosen with the purpose that they are knowledgeable or suited to answer inquiries of the study

Quota Sampling

-commonly used in polls

-the research sets a required number of samples (quota) then, after meeting in the collection of data is done

Convenience Sampling

The samples were chosen based on the accessibility of the researcher to the target participants in the study