Desain Penelitian Eksperimental


Desain penelitian merupakan strategi untuk mencapai tujuan penelitian. Desain penelitian dikatakan berkualitas jika memenuhi 2 (dua) syarat yaitu :

  1. Dapat digunakan untuk menguji hipotesis
  2. Dapat mengendalikan variabel

 

Eksperimental Study

  1. I.      Randomized Controlled Trials

Key of experimental design

  1. At least two groups of individuals/ participant
  2. Random assignment to groups
  3. An independent variable manipulated by the experimenter
  4. A dependent variable being measured

Step in RCT

  1. Quantitative à    Measuring outcome quantitatively
  2. Comparative à    Comparing two or more intervention
  3. Control Experiment à   All variable are closely controlled

Type of RCT Design

1. RCT’s according to how the participant are exposed to the intervention

a. RCT Parallel Design

b. RCT Factorial Design

c. RCT Cross-over Design

 

 

2. RCT’s according to the number of participant

a. From n-of-1 to mega trials

b. Fixed Size

c. Sequential Trials

 

RCT’s according to whether the investigators and participants know which intervention is being assesed

a.    Open Trials

b.    Single Blind Trials

c.    Double Blind Trials

d.    Triple and Quadriple Trials

Aims of Blinding Trials

To prevent bias. Type of bias:

a. Measurement bias (bias yang terjadi saat      pengukuran eksposure)

b. Information bias (bias yang terjadi saat menggali informasi dari subjek)

c. Recall bias (bias yang terjadi saat   menjaring informasi dari responden)

II.   Quasi Eksperimental

Type of Quasi Experiment Design

  1. One Group Posttest Only Design
  2. Posttest Only Design with Non Equivalent Group
  3. One Group Pretest-Posttest Design
  4. One group POSTTEST ONLY DESIGN

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