TSLB3553 QUANTITATIVE

Defining Quantitative Research

• Numerical Data

• Objective Measurement

• Generalizability

  
  

• population

Common quantitative research designs include

• experimental

• quasi-experimental

• orrelational studies.

• case study

Research Design

• Experimental

  
  

• Survey

• Quasi-experimental

• Correlational

Experimental design

• Random Assignment

• Control Group

• Manipulation

• Experience

Quasi-Experimental

• Non-Random Assignment

• Comparison Groups

• Control Group

• alteration of the independent variable

Correlational design

• No Manipulation

• Correlation Coefficient

• Comparison Groups

• Random Assignment

Sampling - Probability sampling

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Sampling

• Purposive Sampling

Non-Probability Sampling

• Simple random sampling

• Purposive sampling

• Snowball sampling

• Convenience Sampling

Quantitative instruments include:

•  Questionnaires

  
  

• Standardized Language Tests

• Interview

• Observation

Pilot Study:

• Ensures clarity and reliability of research instruments

• Identifies potential problems in sampling, data collection, or analysis.

• Helps refine procedures before conducting the full study.

• Refining before full study saves time, cost, and effort.