Jack wants to test if students with LD improve their reading scores with his new
ID: 3264221 • Letter: J
Question
Jack wants to test if students with LD improve their reading scores with his new teaching method. He takes their scores at the beginning of the term and again at the end. Which of the following designs is Jack illustrating?
a.One-shot case study
b.One-group pretest-posttest design
c.Pretest-posttest control group design
d.Time series design
Pt. II
In Jack's study above, students who improved their reading scores due to reading in general and not necessarily due to Jack's new teaching method are an example of which threat?
a.Selection
b.Maturation
c.History
d.Instrumentation
Explanation / Answer
Ans:
1)One-group pretest-posttest design
Option b is correct.
A pretest-posttest design is usually a quasi-experiment where participants are studied before and after the experimental manipulation. Remember, quasi-experimental simply means participants are not randomly assigned. In a pretest-posttest design, there is only one group and all of them are in the experimental condition.
2)Maturation
Option b is correct.
Maturation--the processes within subjects which act as a function of the passage of time. i.e. if the project lasts a few months or years, most participants may improve their performance regardless of treatment.
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