META-ANALYSIS OF RESEARCH
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Transcript META-ANALYSIS OF RESEARCH
LECTURE 8
META ANALYSIS
EPSY 642 FALL 2009
Victor L. Willson
Meta-Analysis Report-Writing
Traditional journal approach:
-Intro, lit review, methods, results, discussion
-References: background, studies in meta analysis*
-Tables: effects, SEs, Q’s, mediators, moderators
-Figures: Cluster diagrams, funnel plots, graphs of effects
by features
Literature review approach:
-Thematic or theory focus: what lit exists, what does it say
Tabular summarizations of works
Theory section
What is already proposed or known about the outcome
What are the purported major mediators and
moderators in the literature to date
What does the literature say about each above? What
is the controversy
Purpose of Study
Explain why a meta-analysis will resolve problems in
the literature
State what the major outcome(s) to be examined
State the major theoretical predictors to be examined
[email protected]
Methods
Sample (or population) of studies
Sources used to find articles
Procedures for cross-referencing
Coding procedure
Coding menu (either as a table or appendix if possible)
Procedures for reliability of coding
Data analysis approach (eg. Lipsey & Wilson)
Results
Descriptives: mean, SD, Q total, funnel plot or other
figure of effects (see Lipsey & Wilson, for example)
Design artifacts- do any cause interpretation
problems, and if so what did you do about them
Revised descriptives after design issues
Mediators and moderators of substantive interest
Data Tables
1. summary of all articles- may have mean effect size or
effects for each construct along with major
independent variables
2. Table of Q statistics (may be in Table 1 above also)
3. Table of mediators and moderators
4. Any multiple regression analyses (vw does not
recommend generally unless good theory for order of
entry of predictors)
Summary/Discussion
Refer to your original discussion of literature and
theory
What did you find that resolves problems or
differences
What new problems have arisen
What research was missing from your meta analysis?
What should people study?