social skills training children learning disabilities p
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Title: Social Skills Training for Children with Learning Disabilities1
2
Lead Reviwer: Lucy Funderburk3
Co-Reviewers: Jamie Schwartz4
Chad Nye5
6
7
Contact Reviewer:8
9Chad Nye10UCF CARD11
12001 Science Dr12
Suite 14513Orlando, FL 3282614
15
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According to the 2006 Annual Report by the National Center for Learning Disabilities1
(NCLD), there are over 15 million children, adolescents and adults with learning disabilities in2
the United States (US) alone. Over the past 35 years, the term learning disability (LD) has been3
used to identify and subsequently inform instruction for children struggling in the classroom. The4
characteristics typically defining children with LD include recognition of a neurological5
processing disorder impacting oral or written language as exhibited in tasks involving speaking,6
listening, reading, writing, spelling, or mathematic calculations. (IDEA, 34 Code of Federal7
Regulations 300.8 (c)(10); NJCLD, 1997, ). The term learning disability does not include8
individuals with sensory impairment (e.g., deaf, blind), mental retardation, emotional disturbance,9
or environmental, cultural, or economic disadvantage; although individuals with these10
handicapping conditions frequently have difficulty learning [IDEA, 34 Code of Federal11
Regulations 300.8 (c)(10); NJCLD, 1997]. Unfortunately, the definition of LD is not universal12
and does not necessarily cross international boundaries. In other countries (e.g., United Kingdom,13
Belgium), the term learning disability refers to individuals with mental retardation. In these14
countries terms such as dyslexia, dyscalculia, and dysgraphia are used to identify those15
children who have specific difficulties learning and may not necessarily be identified as LD based16
on the US definition.17
Although the definition of learning disabilitycenters on the difficulties in academic18
achievement, difficulties in self-regulation, social perception, and social interaction also may exist19
in children with LD. Social skill deficits in children with LD have the potential to affect20
adversely not only their social interactions but academic achievement as well. Researchers21
(Kavale & Forness, 1996; Kavale & Mostert, 2004; Swanson & Malone, 1992) have22
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demonstrated the importance of social competence on the overall development and well-being of1
children with learning disabilities.2
Implications of Social Skills Deficits3
Social skills can refer to a wide range of behaviors and abilities, which can be categorized4
as behaviors associated with social interactions (Kavale & Forness, 1996), and social competence5
(McFall, 1982). These dimensions of social interactions and competence can include friendliness,6
helpfulness, self-control, the ability to cooperate, and the ability to share (LaGreca, 1987). The7
positive attributes of these social behaviors result in successful social interactions for the child8
while the negative attributes are viewed as deficits that can lead to problems such as aggression,9
impulsiveness, acting out, and an overall inability to get along with peers in social situations10
(LaGreca, 1987).11
Social interaction and competence deficits prove to be a defining characteristic of most12
individuals with LD, especially in children and adolescents. Kavale and Forness (1995)13
suggested that social skills deficits are a prominent feature in 75% of children with LD. The14
implication of such a high rate of social deficit is that children and adolescents with LD are faced15
with compound deficits that impact both the quality of life and academic performance in school.16
Few would argue that development of social skills does not play an important role in how all17
children adapt to both societal and academic pressures, thus the presence of social skill and18
competence difficulties can only exacerbate the lack of school success for children with LD.19
Social skill and competency deficits are readily identified at the pre- and early adolescence20
age. Social skill deficits have been shown to increase chances of involvement with juvenile21
authorities, legal problems, or both (Parker & Asher, 1987; Bender & Wall, 1994; Winters, 1997).22
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In addition, Seidel and Vaughn (1991), Bear, Kortering and Braziel (2006), and Reschly and1
Christenson (2006) have all found that youth with LD are at a higher risk of dropping out of2
school. An understanding of difficulties that these students face (Sabornie, 1994) and the impact3
that these deficits have on factors such as peer status and acceptance (Bruininks, 1978; Dudley-4
Marling & Edmiaston, 1985; Wiener, 1987), the student-teacher relationship (Brophy, 1979;5
Garrett & Crump, 1980; Siperstein & Goding, 1985; Northcutt,1986; Seidel & Vaughn, 1991),6
self-concept and perceptions of others (Gresham & Reschly, 1986, Bryan, 1991), and adjustment7
later on in life (Parker & Asher, 1987; Gerber et al, 1990; Kavale & Forness, 1996; Winters,8
1997; Moisan, 1998) may be important to academic success. Thus, attention to interventions that9
will remediate these deficits may be an important component of an individuals educational10
program.11
Social Skills Training (SST)12
SST has been approached from several different cognitive and behavioral intervention13
models such as direct instruction, coaching, modeling, rehearsal, shaping, prompting, and14
reinforcement. Though these models have distinctly unique dimensions they all share the same15
core goal of developing more normalized social behaviors in children and adolescents with16
learning disabilities. The interventions for the various social skills and competencies target17
behaviors such as learning how to listen, ask questions, and ask for assistance; anger control;18
disappointment management; or, demonstrating appropriate emotions and expression of feelings.19
Evidence regarding SST can be drawn from at least three different types of research information20
including primary studies, narrative reviews, and meta-analyses.21
Findings from Primary Studies22
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SST has been advocated by many in the research community as an effective means to treat1
social skills deficits in children and adolescents with LD. For instance, Amerikaner & Summerlin2
(1982) found that group counseling and relaxation techniques were effective in promoting social3
self-esteem and reducing the probability of acting out and distracting others. Likewise, Omizo &4
Omizo (1988) incorporated similar techniques into a treatment program and found that the5
individuals who participated scored significantly higher on the Piers-Harris Childrens Self-6
Concept Scale (Piers, 1969). Trapani and Gettinger (1989) studied the effects of SST and tutoring7
on school-aged boys with LD and found that a combination of a direct instruction method for SST8
and cross-aged tutoring had a positive effect on both the childs overall communication ability9
and academic test scores.10
SST interventions that focus on role-playing, modeling, and feedback have also reported11
mixed or inconclusive findings. Berler, Gross, and & Drabman (1982) found that a five-week12
intervention implemented in group sessions was effective in improving appropriate verbalizations13
and speech duration. However, there was no noted improvement in observed sociometric ratings14
by peers. Hart (1996), who applied a cross-age tutoring and social skills training program similar15
to Trapani but applied to school-aged girls with LD, reported inconclusive results suggesting that16
any social intervention must take into account gender differences.17
Not all research has produced positive intervention effects. Some studies have reported an18
absence of compelling results to support SST (Berler, Gross, & Drabman, 1982; Straub &19
Roberts, 1983; Wanat, 1983; Blackbourn, 1989; Fox, 1989; Utay & Lampe, 1995; Wiener &20
Harris, 1997; Conway, 2001). Other studies have reported little to no improvement in outcomes21
measured, including sociometric scores, teacher ratings, self-perception, starting and maintaining22
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conversations, and responding to failure (LaGreca & Mesibov, 1981; Byham, 1983; Merz, 1985).1
Discrepancies across these studies can be attributed to sampling, measurement, and2
methodological differences; but it is clear that there is a substantial body of research on the topic3
that warrants attention in order to summarize and synthesize the available research regarding the4
efficacy of SST in children and adolescents with LD.5
Findings from Narrative Reviews6
The need for SST for children and adolescents with LD has been a focus of the7
research community for over 30 years (La Greca & Mesibov, 1979; Schumaker & Hazel, 1984;8
Vaughn, 1985) . The awareness of this need has prompted several seminal narrative reviews on9
the topic. In 1980, Zigmond and Brownlee pointed out the need for children with LD to have10
training in social skills. They argued that adolescents with LD need some form of SST and that11
instruction in social skills is as important to the education process as instruction in academic and12
vocational skills. The focus of this summary addressed a series of recommendations as to on13
what an SST program should entail, including aspects of social perception and social behavior;14
how to implement adequately a program through careful assessment and instruction of targeted15
skills; and what kind of student would benefit from SST such as individuals with inappropriate,16
passive, or aggressive behaviors.17
Other researchers have provided similar narrative reviews that have highlighted the need18
for SST in children and adolescents with LD due to low social acceptance ratings among their19
peers. LaGreca (1987) summarized the social skills research in terms of four primary categories20
of issues related to social skill research for children with LD. The first issues was that of21
heterogeneity of the definition of LD which is reflected in the presence of children in the22
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research that present with learning deficits who do not meet the formal definition of a learning1
disabled child (e.g., attention deficit disorder, hyperactive). Further, LaGreca points out that2
even among the identified LD population, the heterogeneity of cognitive, behavioral, and social3
skills is remarkable. For example, in some studies, the participatning LD children were drawn4
from children identified as ADDH making the interpretation of the appropriateness of any5
intervention difficult to extrapolate for those identified specifically as LD.6
A second area of concern regarding social skill training for LD children centers on social7
status. LaGreca (1987) concluded that several studies reported that most children with LD are8
perceived as socially unappealing and that they are generally rejected by their peers. Several9
sociometric issues emerged that would warrant a more indepth investigation of social skill10
intervention for LD children. For example, several studies reported that girls were at a11
disadvantage in social acceptance in spite of the fact that the prevalence of LD is considerably12
higher in males. Other studies reported not all identified LD children have social skill problems13
and concluded that non-academic characteristics may be critical to school success.14
The third area of interest for LaGreca (1987) was social cognitive skills in which a case15
is made for confusion in understanding the research in the area of social skills. LaGreca points16
out that LD children have difficultly in the areas of social perception, social motication, and17
social knowledge and that the research in these areas is inconsistent in terms of the nature of the18
deficits as well as the efficacy of remediation. The conclusions drawn from this summary19
suggested that while social processing may social processing poses potential difficulties for LD20
children, the evidence for the impact of remediation is questionable.21
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Lastly, LaGreca (1987) suggested that the area of social skill training is noticeably1
absent a rich research literature. She points out that while a few studies suggest that intervention2
studies suggest a measure of improvement, the generalization of the trained skills and the impact3
on social status are unknown.4
In a more recent summary, Olmeda & Trent (2003) explored the need for including5
minority individuals with LD in research investigating SST. The authors stressed that the social6
behaviors resulting from sociocultural contexts need to be taken into consideration when7
assessing an individuals social skills abilities. Olmeda and Trent argued that there is a need for8
incorporation of perspectives reflecting multicultural aspects when designing and implementing9
SST interventions.10
These summaries indicated that cognitive, behavioral, and social interaction contribute to11
the low social acceptance of children and adolescents with LD. The primary shortcoming of the12
all of these reviews was the absence of a critical assessment of the existing research that would13
provide guidance in the implementation of a social skill intervention program for learning14
disabled children. That is, they did provide a narrative description of the conclusions that might15
have been gleaned from the primary research, but little attention was paid to either the critical16
analysis of the reported research or the efficacy of that research base.17
The conclusions drawn from these narrative reviews offer a consistent picture of the18
nature, need, and importance of SST for individuals with LD. However, they provide little insight19
into the practices or social skills interventions that might be effective in providing LD children20
with an improved social skill set. A quantitative summary of SST programs would provide an21
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independent and objective assessment of the magnitude of effect for SST programs. Several such1
meta analyses have been reported and are summarized next.2
Findings from Meta-analyses3
Kavale and colleagues (Forness and Kavale (1996); Kavale and Forness, 1996; Kavale &4
Forness, 1995; Kavale and Mostert, 2004) reported results from one (reported in four different5
publications) meta-analysis assessing the effectiveness of SST training for children and6
adolescents with LD. The meta-analysis included 53 empirical studies of varying research design7
representing 2113 participants, 74% of whom were male, with a mean age of 11.5 years and a8
mean IQ of 96. The included studies spanned the years 1976 to 1991. The focus of the review9
was SST programs for children and adolescents with LD that targeted specific behaviors10
associated with social interactions and competence. Summaries of SST effect were presented for11
peer, self, and teacher report. Results suggested that overall, SST programs produced minimal12
results, with about two-tenths of a standard deviation improvement reported by peer and self13
report studies and teachers reporting an SST effect size of about .16. In order for a social skills14
training program to be more effective, Kavale and colleagues have suggested that research on15
STT programs should provide more attention to a higher level of research rigor in the areas of (1)16
design quality, (2) fidelity of program implementation, (3) outcome measurement, and (4)17
implementation of reliable and valid SST programs.18
The Need for a Systematic Review19
Several primary and summary studies have been reported regarding the nature of the20
social skills and competencies of children and adolescents with LD and the effects of programs21
designed to improve those skills and competencies. However, only Kavale and colleagues22
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(Forness and Kavale (1996); Kavale and Forness, 1996; Kavale & Forness, 1995; Kavale and1
Mostert, 2004) have attempted to summarize statistically the nature and magnitude of the effect of2
SST for LD children and adolescents. Unfortunately, the authors did not provide a sufficiently3
transparent and systematic approach to their study in order to replicate the findings. In addition,4
the review did not include studies reported since 1991. Further, their analyses did not provide an5
assessment of the differential effects of SST based on the quality of research design related6
characteristics (e.g., design type, allocation procedure, and fidelity of implementation). Thus, the7
purpose of this review will be to conduct a comprehensive up-to-date systematic review of SST8
programs to provide an assessment of the magnitude of SST effects based on a more extensive,9
transparent, and explicit presentation of the information retrieval, data extraction, analysis, and10
synthesis processes.11
OBJECTIVE12
The purpose of this review is to assess the effectiveness of school based social skills13
training programs on learning disabled school-aged children (grades K - 12) as measured by14
observational, criterion, or formal measures of social skill outcomes.15
16
Operational Definitions of learning disability and social skills training17
Learning Disability18
For this review the term learning disability (LD) will be defined as". . . a disorder in19
one or more of the basic psychological processes involved in understanding or in using language,20
spoken or written, that may manifest itself in an imperfect ability to listen, think, speak, read,21
write, spell, or do mathematical calculations, including conditions such as perceptual disabilities,22
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brain injury, minimal brain dysfunction, dyslexia, and developmental aphasia." Learning1
disabilities do notinclude, "learning problems that are primarily the result of visual, hearing, or2
motor disabilities, of mental retardation, of emotional disturbance, or of environmental, cultural,3
or economic disadvantage." [IDEA, 34 Code of Federal Regulations 300.8(c)(10)]. It is4
recognized that this definition is not universal and indeed most countries do not use the term LD5
to identify individuals who have difficulty learning. In other countries individuals that may be6
identified LD in the US may be identified as having learning difficulties (e.g., United Kingdom,7
Australia, Zimbabwe) or instrumental disabilities (Belgium). In addition, many countries do not8
provide services in the schools for these individuals. According to the Organization for Economic9
Co-operation and Development (OECD), for the 22 countries most likely to provide services to10
children with special needs only 54% provide LD services (OECD, 2004). The following are11
common qualities of individuals with LD regardless of the terminology used to describe them:12
--reading, mathematics, and/or written language achievement substantially below that of peers13
despite normal intelligence,14
--visual and/or auditory perceptual problems,15
--adequate academic instruction,16
--LD first identified in elementary grades,17
--may demonstrate social or emotional difficulties,18
--generally life long19
Social Skill Training20
21
Social skills training are those cognitive or behavioral interventions used to develop more22
normalized social behaviors in children and adolescents with learning disabilities. The23
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intervention may include any of the following strategies: direct instruction, coaching, modeling,1
rehearsal, shaping, prompting, and/or reinforcement.2
METHOD3
Inclusion Criteria and Procedure4
Inclusion of studies will be achieved through a process of screening for (a) titles and5
abstracts and (b) full texts. At the first stage of screening (title/abstract), citations will be6
reviewed for the following inclusion criteria:7
1. social skills training intervention targeted towards participants identified as learning8
disabled; AND9
2. participants in grades K 12 (or international equivalent) AND10
3. two group comparison designs.11
Information Retrieval12
Database thesauri will be consulted, if available, to ensure that appropriate terms and13
synonyms have been included in the participant, intervention and outcome search term categories.14
Search terms and retrieval techniques will be modified to meet the requirements of each15
individual database. No restriction will be used for publication source, language, or date.16
Electronic Databases17
At a minimum, the following electronic databases/sources will be searched:18
1. PSYCINFO19
2. ERIC20
3. DISSERTATION ABSTRACTS21
4. MEDLINE22
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5. GOOGLE SEARCH1
6. SAGE FULL TEXT EDUCATION2
7. BRITISH EDUCATION INDEX3
8. AUSTRIALIAN EDUCATION INDEX4
9. FRANCIS5
10.CBCA EDUCATION6
11.EDUCATION ABSTRACTS7
12.ACADEMIC SEARCH PREMIER8
All databases, including grey literature, will be submitted to the same information retrieval9
criteria described below. Reference lists from a variety of sources such as reviews, retrieved10
studies, anthologies, and conference papers, will be searched for potential inclusion11
characteristics. The following information will be reported for the electronic search:12
a. Databases searched13
b. Time frame searched14
c. Search terms used15
d. Number of citations retrieved16
Grey literature search will be limited to the databases cited above. No attempt will be17
made to search non-professional databases such as Google, AltaVisa, or Web Crawler in order to18
focus time and resources on the professional database sources.19
Search Strategy20
All electronic searches will be comprehensive without restriction to date, language, or21
source. Additional grey literature citations will be sought through contact with experts and22
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organizations (e.g., CED) representing individuals with learning disabilities in the US and1
abroad(e.g., LDUK). Because the primary print sources for research in learning disabilities are2
cataloged in the major databases (e.g., ERIC, PsycInfo) a comprehensive and extensive hand-3
search on individual journals would not be an appropriate use of resources. However, if five (5)4
or more included studies are retrieved from any single journal publication source, a hand-search5
of that journal will be conducted.6
For each database, we will use the following terms to locate relevant studies for this7
review:8
a. Domain Terms: learning disabil*, social skill*,9
b. Intervention Terms: interven*, Treat*, Therap*, training method*, program evaluation,10
behavior-modification, counseling11
c. Target Population Terms: , elementary*, secondary or high school, Sschool-age,12
adolescen*13
Title and Abstract Screening Procedure14
All citations at the title/abstract and full-text retrieval stages will be assessed for inclusion15
criteria by two authors independently. In the event of a disagreement between the two reviewers16
regarding inclusion of a study at the title/abstract stage, the full text of the article will be retrieved17
and read by both reviewers for a decision. Should the reviewers still disagree, the full-text article18
will be reviewed by a third author and a final decision made whether to accept the study for19
inclusion. Reviewers will not be blinded at any level of the review to the name(s) of the author(s),20
institution(s), or publication source.21
Full-Text Screening Procedure22
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All citations at the full-text retrieval stage will be assessed for inclusion criteria by two1
authors independently. In the event of a disagreement between the two reviewers regarding2
inclusion of a study at the full text retrieval stage, the full-text article will be reviewed by a third3
author and a final decision made whether to accept the study for inclusion. Reviewers will not be4
blinded at any level of the review to the name(s) of the author(s), institution(s), or publication5
source.6
Coding Procedure and Categories for Included Studies7
Coding of included studies will be conducted independently by two authors. Any8
discrepancies in coding of an article will be resolved through discussion between the two authors.9
If the reviewers cannot come to a consensus regarding a particular study, a third author will be10
consulted for final judgment. Interrater reliability will be reported in the final review. All coding11
will address design, participant, intervention, and outcome characteristics.12
Coding for Included Non-English Studies13
Studies meeting the inclusion criteria but published in a language other than English will14
be coded using the same form as the English language publications. The coding will be15
conducted by an individual proficient in the written form of the non-English language and guided16
by one of the trained coders of the included English language studies. While we recognize that17
there is not a reliability of coding in the non-English language, a limitation on resources and18
access to multi-lingual coders make this a reasonable approach to obtaining a coding for non-19
English studies.20
Research Design Characteristics21
All included studies will be either randomized controlled trials or quasi-experimental22
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designed studies in which the control and/or comparison group is either matched or statistically1
controlled for at the pre-treatment level. Studies assigning participants at the group level (class,2
school, or district) or individually will be included for review and analysis. No study will be3
included that utilizes a pre-experimental group design (pre- post treatment only), single subject4
design, or qualitative approaches to data collection or analysis. 5
Participant Characteristics6
Participants of the included studies for this review will be Kindergarten through High7
School (or the international equivalent). Each study will be coded for participant characteristics8
such as age, gender, SES, grade in school, severity level, and the number of participants in9
experimental and control or comparison groups. Any study performed outside the United States10
will be examined for the international equivalents of US grades. Excluded populations include11
individuals who were not identified as learning disabled or individuals in whom a learning12
disability was not the primary diagnosis (e.g., deaf, blind, mental retardation, emotional13
disturbance).14
Intervention Characteristics15
Intervention characteristics will include dimensions such as type of intervention16
(e.g., cross-age tutoring, direct instruction, counseling), length of intervention program (e.g.,17
number of days/weeks of program implementation), length of intervention session (number of18
minutes, hours per session) , number of sessions, structure of intervention (e.g., group, individual,19
both). Studies will be excluded from this review if they include only pharmacological20
interventions. In the event that a study treats participants with both behavioral and21
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pharmacological interventions, ONLY the behavioral intervention outcomes will be included1
AND only if there is an accompanying non-experimental control (comparison) group for2
comparison.3
Follow-up assessments will be identified for maintanence and generalization where4
provided and coded for the length of time immediately post intervention.5
Outcome Characteristics6
Outcomes for this review will include:7
a. Behavioral (e.g., anger, aggression)8
b. Cognitive (e.g., social problem solving, self image)9
c. Social (e.g., peer interactions, cooperation)10
Measurement of the outcome characteristics can include observational report, criterion referenced11
assessments, rating scales, or standardized tests12
Assessment of Methodological Quality13
The quality of the methodological rigor of a study may have an important impact on the14
magnitude of the treatment effect size. Individual study methodological quality will be coded and15
assessed for characteristics such as design type, unit of assignment/analysis, attrition, and fidelity16
of treatment implementation. The results of this assessment will be analyzed for their impact on17
the treatment effects. The analysis of this studys methodological quality will be used as18
moderating variables in the data synthesis and interpretation.19
20
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Calculating Effect Size1
Since outcome data may be reported in a variety of formats within individual studies,2
Comprehensive Meta-Analysis (CMA; Borenstein 2001) will be used to calculate the treatment3
effect sizes. This software has the ability to accept data in more than 100 different formats in4
order to transform it to a common effect size and variance. This information is then used in the5
meta-analysis.6
The following are the primary metrics anticipated for the calculation of the effect size:7
Standardized Mean Difference Statistic (d-index)8
For studies reporting outcomes on a continuous scale, the post-treatment mean of the control9
group will be subtracted from the post-treatment mean of the experimental group and the10
difference will be divided by the pooled standard deviation of both groups.11
For studies reporting statistics such as t, F, or p value statistics only, conversion formulae12
will be used to calculate the d-index for the effect size estimate. All study calculations will be13
weighted by the inverse mean variance to allow larger n studies to contribute proportionately in14
any effect size synthesis. All effect sizes will be calculated using a 95% confidence interval.15
Effect Size Adjustments16
Adjustments to the calculated effect sizes will be made for both sample size and17
assignment/analysis mismatch. In order to maximize the interpretation of the calculated effect18
size, we will calculate all effect sizes using Hedges g. Hedges g is a standardized mean19
difference with a small sample size bias correction factor.20
Missing Data21
For any included study presenting missing or inadequate data for analysis, the senior author22
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will be contacted in an effort to obtain the needed data. Should that data not be available, the1
study will be excluded from analysis.2
Synthesis of Effect Sizes3
When estimating the overall effect size of an intervention, the study is represented by the4
mean value of all outcomes in the study. For those studies presenting multiple outcomes, we will5
employ a shifting unit of analysis approach. However, when examining potential moderators of6
the overall outcomes, a studys results will be aggregated only within the separated categories of7
the moderator variable(s). For example, if a study on the effect of social skill training on social8
behavior measured two outcomes, acting-out and distractibility, those two effects would be9
averaged for purposes of estimating the interventions effect on social behavior. However, when10
examining the type of outcome measure as a moderator variable, the study would contribute an11
effect size to the acting-out variable category, and an effect size to the distractibility variable12
category.13
Heterogeneity Analysis14
The heterogeneity analysis allows for an assessment of the amount of variation in the15
calculated effect beyond what is expected due to sampling error. Two basic models of analysis16
are available: fixed effects and random effects. Since the results derived from a random effects17
model will allow us to apply inferences of effect to a population of studies involving individuals18
who have been engaged in a social skill-training program we will use only a random effects19
model for our data analysis.20
Sensitivity Analysis21
A sensitivity analysis allows for the assessment of potential bias that may be part of the22
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calculated effect size. This bias may be present in a variety of characteristics including attrition,1
type of treatment, missing data, sample size, and study design. At a minimum and, where2
appropriate, we will assess potential bias for extreme study effect size, bias using the one study3
removed analysis and funnel plots depictions.4
Post Hoc Subgroup and Moderator Analyses5
It may be important to analyze the impact of specific subsets or study moderators such as6
design, participant, or treatment characteristics. We will examine a limited number of these7
subgroup comparisons or study moderator variables. These analyses may include:8
1. Types of Treatment9
2. Severity Level10
3. Attrition11
4. Intention to Treat vs. Active Treatment only12
5. Age of Participant13
6. Length of Treatment14
15
REVIEW MAINTENANCE16Maintenance of the review will be the responsibility of the lead author Lucy Funderburk.17
18
TIME FRAME FOR REVIEW COMPLETION: October 200919
20
AUTHOR INFORMATION2122
Lucy [email protected] 23
Jamie Schwartz [email protected] 24
Chad Nye [email protected]
26
Sources of Support27
Nordic Campbell Center, Copenhagen, Denmark28
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