Page 63 - Azerbaijan State University of Economics

Ercan Yılmaz, Gulnar Jafarova: Leadership and School Climate in Effective Schools: A Meta-
Analysis

Graph 4: Duval and Tweedie’s Trim and Fill funnel Scatter Graph for the
Publication Partiality of the Studies whose Effect Sizes have been Calculated based
on the Relationship between School Effectiveness and School Climate

Funnel Plot of Standard Error by Fisher's Z
0,00

0,05
0,10
Standard Error

0,15

0,20

-2,0 -1,5 -1,0 -0,5 0,0 0,5 1,0 1,5 2,0
Fisher's Z

The studies in the upp er part of the pyramid in the funnel graph show studies which
have effect size with large samples and the lower part show studies which have
effect size with small samples. The line going from the top of the triangle to the
lower center point shows the average line.

The symmetric distribution on the right and left of the average line of the studies is
accepted as the sing that there is no publication partiality. In this respect, for the
school climate independent variable, if there is one more study shown with a dark
dot on the left side of the average line in Duval and Tweedie’s Trim and Fill analysis
funnel graph, it is assumed that study publication partiality will not exist.

CONCLUSİON, DİSCUSSİON AND SUGGESTİONS
In this meta-analysis study in which it was aimed at analyzing the relationship
between school effectiveness and school climate and leadership and determining the
effect sizes by bringing quantitative studies together and integrating the findings of
studies, the following conclusions were reached:

The effect size calculation based on the relationship between school effectiveness
and leadership was done according to the random effect size model.

It was concluded that there is a positive, strong and significant level (p<.05) of effect
size (0.595) between school effectiveness and leadership. This shows that leadership
is an important factor in making schools effective. When the related literature was
reviewed, it was seen in Chin’s (2007) ‘The effect of Transformative Leadership on

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