Experimental and quasi experimental design

Question 1

what must a experimental design include

Answer 1

Randomization, Control, Manipulation

Question 2

what is randomization?

Answer 2

when subjects are randomly assigned to intervention or control group

Question 3

T/F: randomization increases selection bias

Answer 3

false

Question 4

T/F: randomization increases validity

Answer 4

true

Question 5

random sampling

Answer 5

picking random people to get into the study

Question 6

random assignment

Answer 6

randomly put into groups after chosen

Question 7

control

Answer 7

group that there is no intervention

Question 8

T/F: a control group decreases bias

Answer 8

true

Question 9

T/F: a control group decreases internal validity

Answer 9

false

Question 10

manipulation

Answer 10

independent variable is manipulated

Question 11

power analysis

Answer 11

test to see how many subjects are needed to obtain the desired effect size

Question 12

types of experimental designs

Answer 12

randomized control trial, Solomon four group design, after-only

Question 13

randomized control trial

Answer 13

sample, baseline data, randomization, intervention group, control group, postintervention data collected from both

Question 14

Solomon four group design

Answer 14

sample is selected randomized and split into 4 groups. both have an 2 intervention groups and 2 control groups. 2 has no baseline data collected. all have postintervention data collected

Question 15

after only experimental design

Answer 15

sample is selected, randomized into intervention and control group, data only collected at the end

Question 16

advantages of experimental design

Answer 16

high level of evidence, can evaluate cause-effect relationship, minimize threat to internal and external validity, finding more likely to be generalizable

Question 17

disadvantages of experimental design

Answer 17

complex, costly, sample size, difficult to implement in real world, ethical considerations

Question 18

quasi-experimental design

Answer 18

no randomization and/or no control group or neither, has to have manipulation

Question 19

non equivalent groups design

Answer 19

experimental group, control group, baseline data collected, intervention applied to experimental, data collected in the end

Question 20

after only nonequivalent group design

Answer 20

experimental, control, no baseline, intervention to experimental, data collected after

Question 21

one-group design

Answer 21

experimental, baseline, intervention, data collected

Question 22

time-series

Answer 22

experimental data collected, data collected over time, intervention, data collected twice

Question 23

advantages to quasi-experimental

Answer 23

practical, less costly, more generalizable

Question 24

disadvantages of quasi-experimental

Answer 24

unable to distinguish casual relationships, lower level of evidence