Untitled

RESEARCH  
                             │  
     ┌───────────────────────┴───────────────────────┐  
     │                                               │  
    BASIC RESEARCH                               APPLIED RESEARCH  
     │                                               │  
  (Fundamental science)                         (Solves practical problems)  
     │                                               │  
     ├───────────┬───────────┬───────────┐          ├───────────┬───────────┐  
     │           │           │           │          │           │           │  
 Experimental  Observational  Theoretical  Computational  Clinical    Public Health  
 Research      Research       Research     Research       Research    Research  
     │  
     ├──────────────────────────────────────┐  
     │                                      │  
PRIMARY RESEARCH                        SECONDARY RESEARCH  
(Collecting New Data)                   (Analyzing Existing Data)  
     │                                      │  
     ├──────────────┬──────────────┐        ├──────────────┬──────────────┐  
     │              │              │        │              │              │  
 Randomized       Cohort        Case-     Systematic     Meta-         Narrative  
 Controlled Trial Studies       Control   Review        Analysis      Review  
 (RCT)            (Observational Studies)
RESEARCH  
                             │  
     ┌───────────────────────┴───────────────────────┐  
     │                                               │  
    BASIC RESEARCH                               APPLIED RESEARCH  
     │                                               │  
  (Fundamental science)                         (Solves practical problems)  
     │                                               │  
     ├───────────┬───────────┬───────────┐          ├───────────┬───────────┐  
     │           │           │           │          │           │           │  
 Experimental  Observational  Theoretical  Computational  Clinical    Public Health  
 Research      Research       Research     Research       Research    Research  
     │  
     ├──────────────────────────────────────┐  
     │                                      │  
PRIMARY RESEARCH                        SECONDARY RESEARCH  
(Collecting New Data)                   (Analyzing Existing Data)  
     │                                      │  
     ├──────────────┬──────────────┐        ├──────────────┬──────────────┐  
     │              │              │        │              │              │  
 Randomized       Cohort        Case-     Systematic     Meta-         Narrative  
 Controlled Trial Studies       Control   Review        Analysis      Review  
 (RCT)            (Observational Studies)