TY  - CHAP
M1  - Book, Section
TI  - Validity in Experimental Design
A1  - Portney, Leslie G.
A1  - Watkins, Mary P.
Y1  - 2017
N1  - 
T2  - Foundations of Clinical Research: Applications to Practice, 3e
AB  - The  most  rigorous  form  of  scientific  investigation  for  testing  hypotheses  is  the  experiment.  Experiments  are  based  on  a  logical  structure,  or  design,  within  which  the  investigator  systematically  introduces  changes  into  natural  phenomena  and  then  observes  the  consequences  of  those  changes.  The  purpose  of  an  experiment  is  to  support  a  cause-and-effect  relationship  between  a  particular  action  or  condition  (the  independent  variable)  and  an  observed  response  (the  dependent  variable).  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/19
UR  - fadavispt.mhmedical.com/content.aspx?aid=1138250669
ER  -