Transcript Vanessa DeVito Education 703.22 Spring 2008

Vanessa DeVito
Education 703.22
Spring 2008
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Research Design
Threats to Internal Validity
Threats to External Validity
Proposed Data
Correlational Graphs
References
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Pre-Experimental
Designs:
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*Quasi-ExperimentalSingle Group
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*One group-one
designated treatment
group (X¹) no control
group (X²).
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One-Shot Case Study:
*Single Group exposed
to a treatment (X) and
posttested (O).
*Symbolic Design:XO
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History
* Past literacy experiences and parental involvement.
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Maturation
*Repetition and “Spring Fever”.
Instrumentation
*Self-created and therefore not pilot tested.
Mortality
*Parental comfort level.
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Generalizability
*Impossible to get the same results elsewhere.
Ecological Validity
*Conditioned responses based on surroundings.
Selection-Treatment Interaction
*Not a random selection of students/parents.
Specificity of Variables
*Variables should be consistent and measurable.
Experimenter Effects
*Passive and Active Elements
Survey Questions/Student Attitudes:
1.
I like English Language Arts (ELA).
2.
My guardian(s) encourage me to read.
3.
I am confident in my reading and writing ability.
4.
I enjoy going to the library.
5.
English Language Arts (ELA) is easy for me.
6.
When I have free time I like to read.
7.
I like when my guardian(s) help me with my hw.
8.
I like when my guardian(s) help me study for a test.
9.
I like doing book reports.
10. I like to talk to my guardian(s) about my
schoolwork.
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Choice 1-Strongly Disagree
Choice 4-Strongly Agree
Posttest Results:
Frequency of paired reading as compared to
Scholastic Reading Counts! scores.
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*My child reads to me during the week.
1.Never
2.Once
3. Twice
4. 3x or more
LITERACY ACHIEVEMENT
SCORES
Posttest Scores
120
100
80
60
40
20
0
0
1
2
3
FREQUENCY OF PAIRED READING
The coefficient (.rxy) is 0.933.
It is positive for line of best fit.
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O’Connor-Petruso, S. (2008). Threats to
Internal and External Validity PowerPoint.
Brooklyn College, Graduate Department of
Education.
http://www.physics.csbsju.edu/stats/QF_NROW_form.html