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Description: The Colorado Learning Disabilities Research Center (CLDRC; P50 HD27802) is a long-standing interdisciplinary, multisite research program that is supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development.
Developmental Design: Individual Differences
Description: Mathematical thinking is in high demand in the global market, but approximately six percent of school-age children across the globe experience math difficulties (Shalev, et al., 2000).
Educational Environment: Home Learning Environment
Developmental Design: Cross-sectional, Individual Differences, Longitudinal
Part of Project: The Home Math Environment and Children's Math Achievment: A Meta-Analysis
Description: The data are in long form, with some studies having multiple lines and includes a sample of children ranging from 3.54 to 13.75 years old. The main effect size is the r, correlation coefficient, and the accompanying sample size is also included.
Constructs: Home Experiences, Math
Data Collection Location(s): Existing records
Variable Types: Sum/mean/composite scores
Part of Project: The Home Math Environment and Children's Math Achievment: A Meta-Analysis
Description: This code was written in R version 3.5.3 using the metafor package (Viechtbauer, 2010). First the dataset is called in, then the variables are converted to the correct formats for analysis, then the escalc() function is used to calculate an overall Fisher's Z effect size, which is then converted to an R correlation coefficient.
Code Type: Analysis
Part of Project: Colorado Twin Project
Description: This is the Colorado Twin Dataset in Long Format
Constructs: General Vocab, Math, Phonological Processing, Rapid Naming [RAN], Spelling, Writing Ability
Assessment(s) Used: Peabody Picture Vocabulary Test [PPVT], Test of Word Reading Efficiency: Phonemic Decoding Efficiency [PDE], Test of Word Reading Efficiency: Sight Word Efficiency [SWE], Woodcock-Johnson III Tests of Achievement: Test 2: Reading Fluency, Woodcock-Johnson III Tests of Achievement: Test 6: Math Fluency, Woodcock-Johnson III Tests of Achievement: Test 8: Writing Fluency, Woodcock-Johnson IV Tests of Achievement: Test 6: Writing Samples
Variable Types: Raw scores, Sum/mean/composite scores
Part of Project: Colorado Twin Project
Description: This is the codebook for the Colorado Twin Project
Document Type: Codebook
Description: This project was funded by the NIH through the P50 Florida Learning Disabilities Research Center. More information about the project can be read in this publication about the project:
Taylor, J., Martinez, K., & Hart, S.A. (2019). The Florida State Twin Registry. Twin Research and Human Genetics, 22(6), 728-730.
Educational Environment: Elementary School, Home Learning Environment, Public Middle Schools
Developmental Design: Individual Differences, Longitudinal
Part of Project: Florida Twin Project on Reading, Behavior, and Environment
Description: This dataset contains results from the first wave of surveys sent to parents of twin pairs in 2012.
Constructs: Attention-deficit/hyperactivity disorder [ADHD], Conduct DIsorder, Disruptive Behaviors, Executive Function [EF], Family History of Learning Difficulties, Home And Family, Home Experiences, Home Literacy Environment, Information Sharing, Negative Affect, Oppositional Defiant Disorder (ODD), Personality, Positive Affect, Self-Reported Grades, Temperment, Twin Zygosity
Assessment(s) Used: Behavior Rating Inventory of Executive Functioning (BRIEF), Child and Adolescent Dispositions Scale for Parents (CADS – Parent), Colorado Learning Disability Questionnaire, Confusion, Hubbub, and Order Scale (CHAOS), Disruptive Behavior Disorder (DBD) Rating Scale, Eyberg Child Behavior Inventory, Griffin and Morrison Home Literacy Environment (HLE), Information Sharing, Positive and Negative Affect Scale (PANAS), The Strengths and Weaknesses of ADHD symptoms and Normal behavior scale (SWAN)
Data Collection Location(s): Online/Mail
Variable Types: Item level data, Sum/mean/composite scores
Part of Project: Florida Twin Project on Reading, Behavior, and Environment
Description: This dataset contains results from the second wave of surveys sent to parents of twin pairs in 2014.
Constructs: Attention-deficit/hyperactivity disorder [ADHD], Cognition, Conduct DIsorder, Disposition, Executive Function [EF], Family History of Learning Difficulties, Growth Mindset, Home Literacy Environment, Homework Environment, Information Sharing, Mindset, Oppositional Defiant Disorder (ODD), Personality, Prenatal Environment, Reading Ability, Self-Reported Grades, Temperament
Assessment(s) Used: Behavior Rating Inventory of Executive Functioning (BRIEF), Child and Adolescent Dispositions Scale for Parents (CADS – Parent), Colorado Learning Disability Questionnaire, Confusion, Hubbub, and Order Scale (CHAOS), Disruptive Behavior Disorder (DBD) Rating Scale, DWECK Growth Mindset Scale, Griffin and Morrison Home Literacy Environment (HLE), Homework Problems Checklist, Positive and Negative Affect Scale (PANAS), The Strengths and Weaknesses of ADHD symptoms and Normal behavior scale (SWAN)
Data Collection Location(s): Online/Mail
Variable Types: Item level data, Sum/mean/composite scores
Part of Project: Florida Twin Project on Reading, Behavior, and Environment
Description: This dataset contains results from the third wave of surveys sent to parents of twin pairs in 2016.
Constructs: Attention-deficit/hyperactivity disorder [ADHD], Conduct DIsorder, Home And Family, Home Literacy Environment, Homework Environment, Oppositional Defiant Disorder (ODD), Positive And Negative Affect, Self-Reported Grades, Family Home Environment, Child Special Education Status
Assessment(s) Used: Confusion, Hubbub, and Order Scale (CHAOS), Disruptive Behavior Disorder (DBD) Rating Scale, Griffin and Morrison Home Literacy Environment (HLE), Positive and Negative Affect Scale (PANAS), The Strengths and Weaknesses of ADHD symptoms and Normal behavior scale (SWAN)
Data Collection Location(s): Online/Mail
Variable Types: Item level data, Sum/mean/composite scores
Part of Project: Florida Twin Project on Reading, Behavior, and Environment
Description: This dataset contains results from the wave 2 survey completed by the twins who were 9 and older about themselves, administered in 2012. This contains measures related to the child's home and school environment, attitudes regarding books, home, school, and friends, and several behavioral surveys (PANAS, CADS, etc.).
Constructs: Home And Family, Home Literacy Environment, Parent Child Relationship, Parent Influence, Peer Relationships, Personality, Reading Attitudes, Reading Interests, Reading Motivation, Schooling, Temperament
Assessment(s) Used: Book Authors Checklist, Child and Adolescent Dispositions Scale (CADS), Class Time Scale, Confusion, Hubbub, and Order Scale (CHAOS), Friends Scale, My Parents Scale, Neighborhood Environment Scale, Positive and Negative Affect Scale (PANAS), School Reported Grades
Variable Types: Item level data, Sum/mean/composite scores
