discussion 1: Researchers will always be confronted with issues of internal (thi
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Researchers will always be confronted with issues of internal (things that happen within or inside of the study) and external (things that happen outside of the study but directly impact outcomes) validity.
Review the video above.
Read the scenario below.
Determine how you are going to test the group of participants.
Select a research design or tool (pre-test/posttest and or survey, experimental/control group).
Discuss the impact of internal validity problems as it relates to testing (pg. 263), maturation (pg. 263), and instrumentation (pg. 263), selection (pg. 264) and experimental attrition (pg. 264).
Discuss the impact of external validity problems as it relates to Reactive Settings (pg. 278), Lack of minority participants (pg. 281) Experimenter’s expectation (pg. 279).
nfortunately, research has indicated a high correlation between prison and low reading score/levels of 3rd grade students. Students reading 2 or more levels below their grade are at-risk. As a result, a researcher has developed an early intervention reading program for 1st graders and wants to test the effectiveness. The researcher randomly chooses four 1st grade classrooms in an elementary school and obtains permission to complete the research from the school board and school principal. Students are randomly selected using the combined roster from all four classroom with every 3rd students being placed into either the control or experimental group. No one at the school or even the research assistants will know which students are receiving the intervention. There are a total of 26 students in the control group and 26 in the experimental group. The researcher has two assistants who will help him conduct the research. Each assistant will meet with their assigned groups for 30 minutes twice a week for three weeks. Both groups will take a pre-reading test (to establish a baseline reading score) and post-reading test (to measure effectiveness). The researcher predicts that the students receiving the intervention in the experimental group will have improved reading scores. The control group will not receive the reading intervention but will meet at the same time as the experimental group for the same duration with the assistant reading stories with coloring sheets. The researcher will collect the data and measure results at the end of the experiment.
Independent, Dependent and Confounding Variables in Quantitative Research.
book: Applied Social Research: A Tool for the Human Services
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Using your research projects ( Why does prison reform impact minorities more?)identify the type of research design you will use and what type of problems can occur with internal and external validity.