experimental and quasi-experimental designs

Question 1

quantitative research

Answer 1

is focused on describing and testing relationships between variables and/or examining cause and effect relationships between variables
- experimental
- quasi-experimental

Question 2

experimental research

Answer 2

an objective, systematic controlled investigation to examine the probability and causality among selected independent and dependent variables for the purpose of predicting and controlling phenomena
3 key properties
- randomization
- control
- manipulation

Question 3

randomization

Answer 3

the assignment of participants to the control group or experimental group is random
- eliminates any systematic bias that could impact the dependent variable
- considered the best research design

Question 4

control

Answer 4

obtained by manipulating the causal or IV, randomly assigning groups, careful preparation and strict adherence to experimental protocols, presence of comparison group

Question 5

manipulation

Answer 5

design clearly identifies the IV and how it will be changed or manipulated within the experiment
focus on the differences between the control and the experimental groups

Question 6

antecedent variables

Answer 6

variables that occur before the study but may impact the DV and confound results

Question 7

intervening variables

Answer 7

is a condition that occurs during the course of the study and is not part of the study - may affect the DV and therefore the study’s results
ex: side effects of medications may influence patient views

Question 8

quasi-experimental research design

Answer 8

is intended to test cause and effect relationships, however, full experimental control is not possible
- lacks randomization

Question 9

non-equivalent control group design

Answer 9

looks exactly like experimental design but participants are not randomized
- commonly used in nursing research when randomizing of the patient population may not be possible
- quasi experimental