Erik G Willcutt
Biographic Data
| ID | 241947 |
|---|---|
| NAME | Erik G Willcutt |
| GIVEN NAMES | Erik G |
| FAMILY NAME | Willcutt |
| SIGNATURE | WILLCUTT E G |
| AFFILIATIONS | University of Colorado Boulder |
| ORCID | 0000-0003-0113-7431 |
| VERIFIED | Yes |
| TOTAL WORKS | 19 |
| TOTAL CITATIONS | 12 |
| WORKS AS AUTHOR | 19 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2002 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 2 |
Self-Reported Physical Activity Levels Among College Students with ADHD
Physical activity (PA) and exercise (PE) are associated with benefits, including improvements in executive functioning (EF). Individuals with attention-deficit/hyperactivity disorder (ADHD) experience various EF difficulties, and exercise is being explored as a possible intervention for ADHD; thus, activity levels among those with ADHD merit further study. We explored PA and PE among college students by ADHD status and sex. Students ( N = 2086; 6…
How relations between early reading skills and third-grade mathematics outcomes vary across distribution
Early reading skills are critical for later academic outcomes, which include mathematics. Yet, these relations may vary by a child's ability level. This study examined how early reading skills relate to different levels of third-grade mathematics. The samples included 105 same-sex twin pairs (210 individuals, 57% female, 43% male) from the ongoing longitudinal Western Reserve Reading and Math Projects, assessed at kindergarten ( M = 6.18, SD = 0.…
Compounding Effects of Domain-General Cognitive Weaknesses and Word Reading Difficulties on Anxiety Symptoms in Youth
This study examined whether domain-general cognitive weaknesses in processing speed (PS) or executive functioning (EF) moderate the relation between word reading scores and anxiety such that lower word reading scores in combination with lower cognitive scores are associated with higher anxiety symptoms. The sample consisted of 755 youth ages 8–16 who were recruited as part of the Colorado Learning Disabilities Research Center twins study. Lower s…
Mathematics Difficulties and Psychopathology in School-Age Children
This study investigated the relationship between mathematics difficulties and psychopathology in a large community sample ( N = 881) of youth (8–18 years of age) in the United States. The primary aims of the study were to (a) test the associations between mathematics difficulties and specific components of internalizing, externalizing, attention, and social problems; (b) examine potential age and gender differences; and (c) investigate the longit…
How Specific Are Learning Disabilities
Despite historical emphasis on “specific” learning disabilities (SLDs), academic skills are strongly correlated across the curriculum. Thus, one can ask how specific SLDs truly are. To answer this question, we used bifactor models to identify variance shared across academic domains (academic g), as well as variance unique to reading, mathematics, and writing. Participants were 686 children ages 8 to 16. Although the sample was overselected for le…
College Readiness
Attention-deficit/hyperactivity disorder (ADHD) is characterized by inattentive, hyperactive, and impulsive behaviors. Impairment in individuals diagnosed with ADHD is significant; one such domain of impairment is achieving a college education. College students with ADHD tend to have lower grade point averages, take longer to graduate, and have higher dropout rates than individuals without ADHD. Those with ADHD may be inadequately prepared for co…
Understanding, educating, and supporting children with specific learning disabilities
Cross-Country Differences in Parental Reporting of Symptoms of ADHD
Previous studies within the United States suggest there are cultural and contextual influences on how attention-deficit/hyperactivity disorder (ADHD) symptoms are perceived. If such influences operate within a single country, they are likely to also occur between countries. In the current study, we tested whether country differences in mean ADHD scores also reflect cultural and contextual differences, as opposed to actual etiological differences.…
Reading‐Related Causal Attributions for Success and Failure
The present study investigated the relation among reading skills and attributions, naming speed, and phonological awareness across a wide range of reading skill. Participants were 1,105 school‐age children and youths from two understudied populations: African Americans and Hispanic Americans. Individual assessments of children ranging in age from 8 to 15 years were conducted for reading outcomes, cognitive and linguistic predictors of reading, an…
ADHD prevalence estimates across three decades
Genetic and environmental influences on writing and their relations to language and reading
Validity of DSM-IV attention deficit/hyperactivity disorder symptom dimensions and subtypes.
Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) criteria for attention deficit/hyperactivity disorder (ADHD) specify two dimensions of inattention and hyperactivity-impulsivity symptoms that are used to define three nominal subtypes: predominantly hyperactive-impulsive type (ADHD-H), predominantly inattentive type (ADHD-I), and combined type (ADHD-C). To aid decision making for DSM-5 and other future diagnostic systems…
Predicting word reading and comprehension with executive function and speed measures across development
The present study explored whether different executive control and speed measures (working memory, inhibition, processing speed, and naming speed) independently predict individual differences in word reading and reading comprehension. Although previous studies suggest these cognitive constructs are important for reading, the authors analyze the constructs simultaneously to test whether each is a unique predictor. Latent variables from 483 partici…
The Prevalence of DSM-IV Attention-Deficit/Hyperactivity Disorder
Gene × environment interactions in reading disability and attention-deficit/hyperactivity disorder
This article examines Gene x Environment (G x E) interactions in two comorbid developmental disorders--reading disability (RD) and attention-deficit/hyperactivity disorder (ADHD)--as a window on broader issues on G x E interactions in developmental psychology. The authors first briefly review types of G x E interactions, methods for detecting them, and challenges researchers confront in interpreting such interactions. They then review previous ev…
Colorado longitudinal twin study of reading disability
Validity of the Executive Function Theory of Attention-Deficit/Hyperactivity Disorder
Longitudinal twin study of early reading development in three countries
Big Five dimensions and ADHD symptoms
Attention-deficit/hyperactivity disorder (ADHD) in adulthood is conceptualized as originating in childhood. Despite considerable theoretical interest, little is known about how ADHD symptoms relate to normal personality traits in adults. In 6 studies, the Big Five personality dimensions were related to ADHD symptoms that adults both recalled from childhood and reported concurrently (total N = 1,620). Substantial effects emerged that were replicat…
Big Five dimensions and ADHD symptoms
Attention-deficit/hyperactivity disorder (ADHD) in adulthood is conceptualized as originating in childhood. Despite considerable theoretical interest, little is known about how ADHD symptoms relate to normal personality traits in adults. In 6 studies, the Big Five personality dimensions were related to ADHD symptoms that adults both recalled from childhood and reported concurrently (total N = 1,620). Substantial effects emerged that were replicat…
Gene × environment interactions in reading disability and attention-deficit/hyperactivity disorder
This article examines Gene x Environment (G x E) interactions in two comorbid developmental disorders--reading disability (RD) and attention-deficit/hyperactivity disorder (ADHD)--as a window on broader issues on G x E interactions in developmental psychology. The authors first briefly review types of G x E interactions, methods for detecting them, and challenges researchers confront in interpreting such interactions. They then review previous ev…
Cross-Country Differences in Parental Reporting of Symptoms of ADHD
Previous studies within the United States suggest there are cultural and contextual influences on how attention-deficit/hyperactivity disorder (ADHD) symptoms are perceived. If such influences operate within a single country, they are likely to also occur between countries. In the current study, we tested whether country differences in mean ADHD scores also reflect cultural and contextual differences, as opposed to actual etiological differences.…
Longitudinal twin study of early reading development in three countries
Big Five dimensions and ADHD symptoms
Attention-deficit/hyperactivity disorder (ADHD) in adulthood is conceptualized as originating in childhood. Despite considerable theoretical interest, little is known about how ADHD symptoms relate to normal personality traits in adults. In 6 studies, the Big Five personality dimensions were related to ADHD symptoms that adults both recalled from childhood and reported concurrently (total N = 1,620). Substantial effects emerged that were replicat…
Validity of the Executive Function Theory of Attention-Deficit/Hyperactivity Disorder
Colorado longitudinal twin study of reading disability
Gene × environment interactions in reading disability and attention-deficit/hyperactivity disorder
This article examines Gene x Environment (G x E) interactions in two comorbid developmental disorders--reading disability (RD) and attention-deficit/hyperactivity disorder (ADHD)--as a window on broader issues on G x E interactions in developmental psychology. The authors first briefly review types of G x E interactions, methods for detecting them, and challenges researchers confront in interpreting such interactions. They then review previous ev…
Validity of DSM-IV attention deficit/hyperactivity disorder symptom dimensions and subtypes.
Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) criteria for attention deficit/hyperactivity disorder (ADHD) specify two dimensions of inattention and hyperactivity-impulsivity symptoms that are used to define three nominal subtypes: predominantly hyperactive-impulsive type (ADHD-H), predominantly inattentive type (ADHD-I), and combined type (ADHD-C). To aid decision making for DSM-5 and other future diagnostic systems…
Predicting word reading and comprehension with executive function and speed measures across development
The present study explored whether different executive control and speed measures (working memory, inhibition, processing speed, and naming speed) independently predict individual differences in word reading and reading comprehension. Although previous studies suggest these cognitive constructs are important for reading, the authors analyze the constructs simultaneously to test whether each is a unique predictor. Latent variables from 483 partici…
The Prevalence of DSM-IV Attention-Deficit/Hyperactivity Disorder
Genetic and environmental influences on writing and their relations to language and reading
ADHD prevalence estimates across three decades
Reading‐Related Causal Attributions for Success and Failure
The present study investigated the relation among reading skills and attributions, naming speed, and phonological awareness across a wide range of reading skill. Participants were 1,105 school‐age children and youths from two understudied populations: African Americans and Hispanic Americans. Individual assessments of children ranging in age from 8 to 15 years were conducted for reading outcomes, cognitive and linguistic predictors of reading, an…
Cross-Country Differences in Parental Reporting of Symptoms of ADHD
Previous studies within the United States suggest there are cultural and contextual influences on how attention-deficit/hyperactivity disorder (ADHD) symptoms are perceived. If such influences operate within a single country, they are likely to also occur between countries. In the current study, we tested whether country differences in mean ADHD scores also reflect cultural and contextual differences, as opposed to actual etiological differences.…
Understanding, educating, and supporting children with specific learning disabilities
How Specific Are Learning Disabilities
Despite historical emphasis on “specific” learning disabilities (SLDs), academic skills are strongly correlated across the curriculum. Thus, one can ask how specific SLDs truly are. To answer this question, we used bifactor models to identify variance shared across academic domains (academic g), as well as variance unique to reading, mathematics, and writing. Participants were 686 children ages 8 to 16. Although the sample was overselected for le…
College Readiness
Attention-deficit/hyperactivity disorder (ADHD) is characterized by inattentive, hyperactive, and impulsive behaviors. Impairment in individuals diagnosed with ADHD is significant; one such domain of impairment is achieving a college education. College students with ADHD tend to have lower grade point averages, take longer to graduate, and have higher dropout rates than individuals without ADHD. Those with ADHD may be inadequately prepared for co…
Compounding Effects of Domain-General Cognitive Weaknesses and Word Reading Difficulties on Anxiety Symptoms in Youth
This study examined whether domain-general cognitive weaknesses in processing speed (PS) or executive functioning (EF) moderate the relation between word reading scores and anxiety such that lower word reading scores in combination with lower cognitive scores are associated with higher anxiety symptoms. The sample consisted of 755 youth ages 8–16 who were recruited as part of the Colorado Learning Disabilities Research Center twins study. Lower s…
Mathematics Difficulties and Psychopathology in School-Age Children
This study investigated the relationship between mathematics difficulties and psychopathology in a large community sample ( N = 881) of youth (8–18 years of age) in the United States. The primary aims of the study were to (a) test the associations between mathematics difficulties and specific components of internalizing, externalizing, attention, and social problems; (b) examine potential age and gender differences; and (c) investigate the longit…
How relations between early reading skills and third-grade mathematics outcomes vary across distribution
Early reading skills are critical for later academic outcomes, which include mathematics. Yet, these relations may vary by a child's ability level. This study examined how early reading skills relate to different levels of third-grade mathematics. The samples included 105 same-sex twin pairs (210 individuals, 57% female, 43% male) from the ongoing longitudinal Western Reserve Reading and Math Projects, assessed at kindergarten ( M = 6.18, SD = 0.…
Self-Reported Physical Activity Levels Among College Students with ADHD
Physical activity (PA) and exercise (PE) are associated with benefits, including improvements in executive functioning (EF). Individuals with attention-deficit/hyperactivity disorder (ADHD) experience various EF difficulties, and exercise is being explored as a possible intervention for ADHD; thus, activity levels among those with ADHD merit further study. We explored PA and PE among college students by ADHD status and sex. Students ( N = 2086; 6…
Psychology (17 works) · Developmental psychology (14 works) · Attention Deficit Hyperactivity Disorder (11 works) · Clinical Psychology (9 works) · Cognition (9 works) · Linguistics (8 works) · Psychiatry (8 works) · Cognitive psychology (7 works) · Reading (process) (6 works) · Reading and Literacy Development (6 works)