But what does it mean?: the use of effect sizes in educational research
Saved in:
| Format: | Book |
|---|---|
| Language: | English |
| Published: |
Slough, Berks.
NFER
2004
|
| Edition: | 1. publ. |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | XII, 126 S. graph. Darst. |
| ISBN: | 190388067x |
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MARC
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| 245 | 1 | 0 | |a But what does it mean? |b the use of effect sizes in educational research |c ed. by Ian Schagen ... |
| 250 | |a 1. publ. | ||
| 264 | 1 | |a Slough, Berks. |b NFER |c 2004 | |
| 300 | |a XII, 126 S. |b graph. Darst. | ||
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Record in the Search Index
| _version_ | 1804133243079884800 |
|---|---|
| adam_text | Contents
Contributors
viii
Introduction
ix
Karen Elliot and Ian Shagen
Acknowledgements
xii
1
Getting to grips with effect sizes : some reflections
on a personal journey
1
John Gray
2
Exploring the use of effect sizes to evaluate the impact of
different influences on child outcomes: possibilities and limitations
6
Karen Elliot and Pam
Sommons
2.1
Introduction
6
2.2
Background to the use of effect sizes
7
2.3
The reporting of results in school effectiveness research
(SER)
9
2.4
Calculating effect sizes within multilevel modelling
12
2.5
The presentation and interpretation of effect sizes
15
2.6
Conclusion
17
3
Presenting the results of complex models
-
normalised coefficients,
star wars plots and other ideas
25
Ian
Schagen
3.1
Introduction
25
3.2
Presenting multilevel outcomes for the fixed part of the model
26
3.2.1
Coefficients
26
3.2.2
Normalised coefficients
27
3.2.3
Pseudo
effect sizes
29
3.2.4
Measures for interaction terms
32
3.2.5
Adjusted coefficients
35
3.3
The choice of units for presenting results
36
3.4
Summary and conclusions
39
4
The use of effect sizes: two examples from recent educational research
42
Steve Strand
4.1
Introduction
42
4.2
Example
1 :
Large sample sizes
-
sex differences in cognitive abilities
test scores (Strand,
2003) 43
4.2.1
The dataset
43
4.2.2
Results
44
4.2.3
Sex differences in mean scores
44
4.2.4
Sex differences in score variance
45
4.2.5
Example
1
conclusions
46
4.3
Example
2:
Establishing the relative impact of a range of equally
statistically significant factors
-
does pupil mobility
(changing school) affect educational progress
between age
4
and age
7? 48
4.3.1
Background
48
4.3.2
Results
49
4.3.3
Example
2
conclusions
52
4.4
Overall conclusions
53
5
Effect sizes in multilevel models
55
Peter Tymms
5.1
Introduction
55
5.2
Where the variable is dichotomous
56
5.2.1
When the dummy variable is not a school effect
59
5.3
Where the measure is continuous
61
5.4
There are units (schools) that form a continuum
63
5.5
Relationship of effect size tor2 and to the intra-class correlation
64
5.6
Conclusion
65
6
Some observations on the definition and estimation of effect sizes
67
Harvey Goldstein
6.1
General considerations
67
6.2
Presentation and units of reporting
68
6.3
Binary variables
69
6.4
Utilities and costs
71
7
Notes as discussant
73
Trevor Knight
7.1
Background
73
7.2
Data analysis and presentation issues
76
7.3
Conclusions
78
vi
8
Issues
arising from the use of effect sizes in analysing and
reporting research
80
Robert
Coe
8.1
Introduction
80
8.2
The case for using effect size measures
81
8.2.1
Effect size enables uncalibrated measures to be interpreted
81
8.2.2
Effect size emphasises amounts, not just statistical significance
82
8.2.3
Effect size draws attention to the margin of error
84
8.2.4
Effect size may help to reduce reporting bias
85
8.2.5
Effect size allows the accumulation of knowledge
85
8.3
Problems in using effect size measures
87
8.3.1
Which effect size?
87
8.3.2
Which standard deviation?
89
8.3.3
Measurement reliability
91
8.3.4
Non-normal distributions
92
8.3.5
Small , medium and large effects
94
8.3.6
Incommensurability
94
8.4
Summary and recommendations
95
9
Effect size: a statistician s pseudo-concept?
101
Ray Godfrey
10
Effect size: what does it mean?
110
Caroline Sharp
11
Discussion
113
Michela Gnaldi
and Paula Hammond
11.1
Technical issues
113
11.2
Non-technical issues
116
11.3
Summing up
117
12
Final summary
120
Ian
Schagen
and Karen Elliot
Glossary
123
VII
|
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| id | DE-604.BV019765057 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T20:05:37Z |
| institution | BVB |
| isbn | 190388067x |
| language | English |
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| physical | XII, 126 S. graph. Darst. |
| publishDate | 2004 |
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| publishDateSort | 2004 |
| publisher | NFER |
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| spelling | But what does it mean? the use of effect sizes in educational research ed. by Ian Schagen ... 1. publ. Slough, Berks. NFER 2004 XII, 126 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Evaluatie gtt Onderwijsresearch gtt Erziehung Education Research Evaluation Pädagogik (DE-588)4044302-4 gnd rswk-swf Forschung (DE-588)4017894-8 gnd rswk-swf Pädagogik (DE-588)4044302-4 s Forschung (DE-588)4017894-8 s DE-604 Schagen, Ian Sonstige oth Digitalisierung UB Bamberg application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=013091324&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | But what does it mean? the use of effect sizes in educational research Evaluatie gtt Onderwijsresearch gtt Erziehung Education Research Evaluation Pädagogik (DE-588)4044302-4 gnd Forschung (DE-588)4017894-8 gnd |
| subject_GND | (DE-588)4044302-4 (DE-588)4017894-8 |
| title | But what does it mean? the use of effect sizes in educational research |
| title_auth | But what does it mean? the use of effect sizes in educational research |
| title_exact_search | But what does it mean? the use of effect sizes in educational research |
| title_full | But what does it mean? the use of effect sizes in educational research ed. by Ian Schagen ... |
| title_fullStr | But what does it mean? the use of effect sizes in educational research ed. by Ian Schagen ... |
| title_full_unstemmed | But what does it mean? the use of effect sizes in educational research ed. by Ian Schagen ... |
| title_short | But what does it mean? |
| title_sort | but what does it mean the use of effect sizes in educational research |
| title_sub | the use of effect sizes in educational research |
| topic | Evaluatie gtt Onderwijsresearch gtt Erziehung Education Research Evaluation Pädagogik (DE-588)4044302-4 gnd Forschung (DE-588)4017894-8 gnd |
| topic_facet | Evaluatie Onderwijsresearch Erziehung Education Research Evaluation Pädagogik Forschung |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=013091324&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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