Peer-Reviewed Journal Articles
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2024
Leader, G., Coyne, R., Killeen, C., Whelan, S., Tones, M., & Mannion, A. (2024). Factors associated with sleep disturbances in children and adolescents with Angelman Syndrome. Journal of Sleep Medicine. https://doi.org/10.1016/j.sleep.2024.02.038
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2023
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Mannion, A., Coyne, R., Ferrari, C., NeÅŸeli, M., McGee, C., Mollaoglu, S., & Leader, G. (2023). Personalized system of instruction in Higher Education: A systematic review. Journal of Behavioral Education. https://doi.org/10.1007/s10864-023-09530-8
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Ivan Traina, Arlene Mannion, Geraldine Leader. (2023). Systematic Review of Job Transition Programs Addressed to Youths With Intellectual Disability. Journal of Adult and Continuing Education,
https://doi.org/10.1177/14779714231170528
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Mannion, A., & Leader, G. (2023). Relationship between child sleep problems in autism spectrum disorder and parent mental health and well-being. Sleep Medicine, 109, 4 10.
https://www.sciencedirect.com/science/article/pii/S1389945723001788?via%3Dihub
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Mannion, A., & Leader, G. (2023). Relationship between gastrointestinal symptoms in autism spectrum disorder and parent stress, anxiety, depression, quality of life and social support. Journal of Autism and Developmental Disorders. In Press.
https://link.springer.com/article/10.1007/s10803-023-06110-7
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Whelan, S., & Leader, G.(2023). Virtual Reality: Unlocking Employment Opportunities for Autistic Adults? In C. Sousa, & A.H. Tkaczyk (Eds.), Media Literacy and Assistive Technologies for Empowerment in Autism (pp. 95-108). Edições Universitárias Lusófonas.
https://www.doi.org/10.24140/asdigital.v1.p02.04
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Leader, G., Curtin, A., Shprintzen, R. J., Whelan, S., Coyne, R., & Mannion, A. (2023). Adaptive living skills, sleep problems, and mental health disorders in adults with 22q11.21 deletion syndrome. Research in Developmental Disabilities, 136, 104491. https://doi.org/10.1016/j.ridd.2023.104491 Link to article
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Athamanah, L., White, K., Sung, C., Fisher, M., & Leader, G. (2022). Employers' Perspectives on Individuals With IDD in Community Integrated Employment Settings: A Scoping Review. Inclusion, 10(3), 226-250. doi: 10.1352/2326-6988-10.3.226
Link to article
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Leader, G., Whelan, S., Chonaill, N. N., Coyne, R., Tones, M., Heussler, H., Bellgard, M., & Mannion, A. (2022). Association between early and current gastro-intestinal symptoms and co-morbidities in children and adolescents with Angelman syndrome. J Intellect Disabil Res, 66, 15. Link to article
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Leader, G., Gilligan, R., Whelan, S., Coyne, R., Caher, A., White, K., ... & Mannion, A. (2022). Relationships between challenging behavior and gastrointestinal symptoms, sleep problems, and internalizing and externalizing symptoms in children and adolescents with Angelman syndrome. Research in Developmental Disabilities, 128, 104293. Link to article
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Geraldine Leader, Amy Hogan, June L. Chen, Leanne Maher, Katie Naughton, Nathan O’Rourke, Mia Casburn & Arlene Mannion (2022) Age of Autism Spectrum Disorder Diagnosis and Comorbidity in Children and Adolescents with Autism Spectrum Disorder, Developmental Neurorehabilitation, 25:1, 29-37. Link to Article
Higgins, L., Mannion, A., Chen, J.L. Leader, G. (2022). Adaptation of Parents Raising a Child with ASD: The Role of Positive Perceptions, Coping, Self-efficacy, and Social Support. Journal of Autism and Developmental Disorders, 1-19. Link to Article
Whelan, S., Mannion, A., Madden, A., Berger, F., Costello, R., Ghadiri, S., Leader, G. (2022) Examining the Relationship Between Sleep Quality, Social Functioning, and Behavior Problems in Children with Autism Spectrum Disorder: A Systematic Review . Nature and Science of Sleep. 14, 675-695 Link to Article
Leader, G., Browne, H., Whelan, S., Cummins, H., & Mannion, A. (2022). Affective problems, gastrointestinal symptoms, sleep problems, and challenging behaviour in children and adolescents with autism spectrum disorder. Research in Autism Spectrum Disorders, 92, 101915. Link to Article
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Curtin, A., Mannion, A., Shprintzen, R. J., Whelan, S., Coyne, R., & Leader, G. (2022). An examination of adaptive behavior and functional outcomes in adults with 22q11. 2 deletion syndrome: A parental perspective. American Journal of Medical Genetics Part A, 188(4), 1040-1047. Link to Article
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Traina, I., Mannion, A., & Leader, G. (2022). Transition Program from School to Employment in Youths with Intellectual Disability: Evaluation of the Irish Pilot Study E-IDEAS. Developmental Neurorehabilitation, 25(2), 87-100. Link to Article
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Geraldine Leader, Amy Hogan, June L. Chen, Leanne Maher, Katie Naughton, Nathan O’Rourke, Mia Casburn & Arlene Mannion (2022) Age of Autism Spectrum Disorder Diagnosis and Comorbidity in Children and Adolescents with Autism Spectrum Disorder, Developmental Neurorehabilitation, 25:1, 29-37. Link to Article
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Higgins, L., Mannion, A., Chen, J.L. Leader, G. (2022). Adaptation of Parents Raising a Child with ASD: The Role of Positive Perceptions, Coping, Self-efficacy, and Social Support. Journal of Autism and Developmental Disorders, 1-19. Link to Article
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Whelan, S., Mannion, A., Madden, A., Berger, F., Costello, R., Ghadiri, S., Leader, G. (2022) Examining the Relationship Between Sleep Quality, Social Functioning, and Behavior Problems in Children with Autism Spectrum Disorder: A Systematic Review . Nature and Science of Sleep. 14, 675-695 Link to Article
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Leader, G., Abberton, C., Cunningham, S., Gilmartin, K., Grudzien, M., Higgins, E., Whelan, S., & Mannion, A. (2022). Gastrointestinal Symptoms in Autism Spectrum Disorder: A Systematic Review. Nutrients, 14(7), 1471. Link to Article
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Forde, J., Bonilla, P. M., Mannion, A., Coyne, R., Haverty, R., & Leader, G. (2021). Health Status of Adults with Autism Spectrum Disorder. Review Journal of Autism and Developmental Disorders, 1-11. Link to Article
Leader, G., Mooney, A., Chen, J. L., Whelan, S., Naughton, K., Maher, L., & Mannion, A. (2021). The Co-Occurrence of Autism Spectrum Disorder and Cerebral Palsy and Associated Comorbid Conditions in Children and Adolescents. Developmental Neurorehabilitation, 1-9. Link to Article
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Leader, G., Dooley, E., Whelan, S., Gilroy, S. P., Chen, J. L., Farren Barton, A., ... & Mannion, A. (2021). Attention-deficit/hyperactivity disorder symptoms, gastrointestinal symptoms, sleep problems, challenging behavior, adaptive behavior, and quality of life in children and adolescents with autism Spectrum disorder. Developmental Neurorehabilitation, 1-12. Link to Article
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Murray, A., Mannion, A., Chen, J. L., & Leader, G. (2021). Gaming Disorder in Adults with Autism Spectrum Disorder. Journal of Autism and Developmental Disorders, 1-8. Link to Article
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Murray, A., Koronczai, B., Király, O., Griffiths, M. D., Mannion, A., Leader, G., & Demetrovics, Z. (2021). Autism, problematic internet use and gaming disorder: A systematic review. Review Journal of Autism and Developmental Disorders, 1-21. Link to Article
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Lanyi, J., Flynn, C., Mannion, A., Maher, L., Naughton, K., & Leader, G. (2021). Abdominal Pain in Children and Adolescents with Autism Spectrum Disorder: a Systematic Review. Review Journal of Autism and Developmental Disorders, 1-10. Link to Article
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Leader, G., Flynn, C., O’Rourke, N., Coyne, R., Caher, A., & Mannion, A. (2021). Comorbid psychopathology, challenging behavior, sensory issues, adaptive behavior and quality of life in children and adolescents with autism spectrum disorder. Developmental Neurorehabilitation, 24(6), 397-407. Link to Article
Leader, G., Glynn, C., Kirkpatrick, B., Chen, J. L., O’Súilleabháin, P. S., & Mannion, A. (2021). Familial sleep and autism spectrum disorder: a pilot actigraphy study of sleep quality, quality of life and psychological distress. Irish Journal of Psychological Medicine, 1-11. Link to Article
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Leader, G., Barrett, A., Ferrari, C., Casburn, M., Maher, L., Naughton, K., ... & Mannion, A. (2021). Quality of life, gastrointestinal symptoms, sleep problems, social support, and social functioning in adults with autism spectrum disorder. Research in Developmental Disabilities, 112, 103915. Link to Article
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Leader, G., Moore, R., Chen, J. L., Caher, A., Arndt, S., Maher, L., ... & Mannion, A. (2021). Attention deficit hyperactivity disorder (ADHD) symptoms, comorbid psychopathology, behaviour problems and gastrointestinal symptoms in children and adolescents with autism spectrum disorder. Irish Journal of Psychological Medicine, 1-11. Link to Article
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Leader, G., Forde, J., Naughton, K., Maher, L., Arndt, S., & Mannion, A. (2021). Relationships among gastrointestinal symptoms, sleep problems, challenging behaviour, comorbid psychopathology and autism spectrum disorder symptoms in children and adolescents with 15q duplication syndrome. Journal of Intellectual Disability Research, 65(1), 32-46. Link to Article
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Leader, G., Molina Bonilla, P., Naughton, K., Maher, L., Casburn, M., Arndt, S., & Mannion, A. (2021). Complex comorbid presentations are associated with harmful behavior problems among children and adolescents with cerebral palsy. Developmental neurorehabilitation, 24(1), 25-34. Link to Article
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Leader, G., O’Reilly, M., Gilroy, S. P., Chen, J. L., Ferrari, C., & Mannion, A. (2021). Comorbid feeding and gastrointestinal symptoms, challenging behavior, sensory issues, adaptive functioning and quality of life in children and adolescents with autism spectrum disorder. Developmental neurorehabilitation, 24(1), 35-44. Link to Article
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Reilly, J., Gallagher, L., Leader, G., & Shen, S. (2020). Coupling of autism genes to tissue-wide expression and dysfunction of synapse, calcium signalling and transcriptional regulation. PloS one, 15(12), e0242773. Link to Article
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Troisi, J., Autio, R., Beopoulos, T., Bravaccio, C., Carraturo, F., Corrivetti, G., ... & Fasano, A. (2020). Genome, environment, microbiome and metabolome in autism (GEMMA) study design: biomarkers identification for precision treatment and primary prevention of autism spectrum disorders by an integrated multi-omics systems biology approach. Brain sciences, 10(10), 743. Link to Article
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Skelly, L. J., Smyth, P. P., Donnelly, M. P., Leslie, J. C., Leader, G., Simpson, L., & McDowell, C. (2021). Factors that potentially influence successful weight loss for adults with intellectual disabilities: A qualitative comparison. Journal of Intellectual Disabilities, 25(4), 458-475. Link to Article
Leader, G., Murray, M., O’Súilleabháin, P. S., Maher, L., Naughton, K., Arndt, S., ... & Mannion, A. (2020). Relationship between parent-reported gastrointestinal symptoms, sleep problems, autism spectrum disorder symptoms, and behavior problems in children and adolescents with 22q11. 2 deletion syndrome. Research in Developmental Disabilities, 104, 103698. Link to Article
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Leader, G., Tuohy, E., Chen, J. L., Mannion, A., & Gilroy, S. P. (2020). Feeding problems, gastrointestinal symptoms, challenging behavior and sensory issues in children and adolescents with autism spectrum disorder. Journal of Autism and Developmental Disorders, 50(4), 1401-1410. Link to Article
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Louw, J. S., Kirkpatrick, B., & Leader, G. (2020). Enhancing social inclusion of young adults with intellectual disabilities: A systematic review of original empirical studies. Journal of Applied Research in Intellectual Disabilities, 33(5), 793-807. Link to Article
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2019
Kirkpatrick, B., Louw, J. S., & Leader, G. (2019). Efficacy of parent training incorporated in behavioral sleep interventions for children with autism spectrum disorder and/or intellectual disabilities: a systematic review. Sleep Medicine, 53, 141-152. Link to Article
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Kirkpatrick, B., Gilroy, S. P., & Leader, G. (2019). Qualitative study on parents’ perspectives of the familial impact of living with a child with autism spectrum disorder who experiences insomnia. Sleep Medicine. In Press. Link to article
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2018
Dunne, E., Santorelli, A., McGinley, B., Leader, G., O’Halloran, M., & Porter, E. (2018). Image-based Classification of Bladder State using Electrical Impedance Tomography. Physiological Medicine. In Press. Link to article
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Kirkpatrick, B., Leader, G., & Louw, J. (2018). Efficacy of parent training incorporated in behavioural sleep interventions for children with Autism Spectrum Disorder and/or Intellectual Disabilities: A systematic review. Sleep Medicine, 53, 141-152. Link to article
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Gilroy, S. P., McCleery, J. P., & Leader, G. (2018). A pilot community-based randomized comparison of Speech Generating Devices and the Picture Exchange Communication System for children diagnosed with Autism Spectrum Disorder. Autism Research, 11, 1701-1711. Link to article
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Berenguer, C., Rosello, B., & Leader, G. (2018). A review of executive functions in autism spectrum disorder and attention deficit hyperactivity disorder. Journal of Educational and Developmental Psychology, 8(2), 107-119. Link to article
Leader, G., Grennan, S., Chen, J.L., & Mannion, A. (2018). An investigation of Gelotophobia in individuals with a diagnosis of high-functioning Autism Spectrum Disorder. Journal of Autism and Developmental Disorders, 48(12), 4155-4166. Link to article
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Grennan, S., Mannion, A., & Leader, G. (2018). Gelotophobia and high-functioning Autism Spectrum Disorder. Review Journal of Autism and Developmental Disorders, 5(4), 349-359. Link to article
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Gilroy, S.P., Kaplan, B.A., & Leader, G. (2018). A systematic review of applied behavioral economics in assessments and treatments for individuals with developmental disabilities. Review Journal of Autism and Developmental Disorders, 5(3), 247-259. Link to article
Dunne, E., Santorelli, A., McGinley, B., Leader, G., O’Halloran, M., & Porter, E. (2018). Supervised Learning Classifiers for Electrical Impedance-based Bladder State Detection. Scientific Reports, 8(1), 5363. Link to article
Leader, G., Francis, K., Mannion, A., & Chen, J. (2018). Toileting Problems in children and adolescents with parent reported diagnoses of autism spectrum disorder. Journal of Developmental and Physical Disabilities, 30(3), 307-327. Link to article
Clifford Simplican, S., Shivers, C., Chen, J., & Leader, G. (2018). “With a Touch of a Button”: Staff perceptions on integrating technology in an Irish service provider for people with intellectual disabilities. Journal of Applied Research in Intellectual Disabilities, 31(1), 130-139. Link to article
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2017
Francis, K., Mannion, A., & Leader, G. (2017). The Assessment and Treatment of Toileting Difficulties in Individuals with Autism Spectrum Disorder and Other Developmental Disabilities. Review Journal of Autism and Developmental Disorders, 4(3), 190-204. Link to article
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Gilroy, S. P., McCleery, J. P., & Leader, G. (2017). Systematic Review of Methods for Teaching Social and Communicative Behavior with High-Tech Augmentative and Alternative Communication Modalities. Review Journal of Autism and Developmental Disorders, 4(4), 307-320. Link to article
Reilly, J., Gallagher, L., Chen, J. L., Leader, G., & Shen, S. (2017). Bio-collections in autism research. Molecular autism, 8(1), 34. Link to article
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2016
Mannion, A., & Leader, G. (2016). An investigation of comorbid psychological disorders, sleep problems, gastrointestinal symptoms and epilepsy in children and adolescents with autism spectrum disorder: A two year follow-up. Research in Autism Spectrum Disorders, 22, 20-33. Link to article
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Kelly, M. P., Leader, G., & Reed, P. (2016). Factors producing over-selectivity in older individuals. AGE, 38(3), 1-10. Link to article
Sigurjónsson, J. G., Keane, M., Denis, O. H., Stewart, I., Leader, G. (2016). Electrophysiological activity during stimulus class formations. Journal of Behaviorology, 19(1), 3-26.
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2015
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Kelly, M., Leader, G., & Reed P. (2015). Stimulus over-selectivity and extinction-induced recovery of performance as a product of intellectual impairment and autism severity. Journal of Autism and Developmental Disorders, 45(10), 3098-3106. Link to article
Newman, I., Leader, G., Chen, J. L., & Mannion, A. (2015). An analysis of challenging behavior, comorbid psychopathology, and Attention-Deficit/Hyperactivity Disorder in Fragile X Syndrome. Research in Developmental Disabilities, 38, 7-17. Link to article
Williams, S., Leader, G., Mannion, A., & Chen, J. (2015). An investigation of anxiety in children and adolescents with autism spectrum disorder. Research in Autism Spectrum Disorders, 10, 30-40. Link to article
Simplican, S. C., Leader, G., Kosciulek, J., & Leahy, M. (2015). Defining social inclusion of people with intellectual and developmental disabilities: An ecological model of social networks and community participation. Research in Developmental Disabilities, 38, 18-29. Link to article
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Clifford Simplican, S., & Leader, G. (2015). Counting inclusion with Chantal Mouffe: a radical democratic approach to intellectual disability research. Disability & Society, 30(5), 717-730. Link to article
Chen, J. L., Leader, G., Sung, C., & Leahy, M. (2015). Trends in Employment for Individuals with Autism Spectrum Disorder: a Review of the Research Literature. Review Journal of Autism and Developmental Disorders, 2(2), 115-127. Link to article
Foody, C., James, J. E., & Leader, G. (2015). Parenting Stress, Salivary Biomarkers, and Ambulatory Blood Pressure: A Comparison Between Mothers and Fathers of Children with Autism Spectrum Disorders. Journal of Autism and Developmental Disorders, 45(4), 1084-1095. Link to article
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2014
Mannion, A., Brahm, M., & Leader, G. (2014). Comorbid psychopathology in autism spectrum disorder. Review Journal of Autism and Developmental Disorders, 1(2), 124-134. Link to article
Mannion, A., & Leader, G. (2014). Epilepsy in autism spectrum disorder. Research in Autism Spectrum Disorders, 8(4), 354-361. Link to article
Mannion, A., & Leader, G. (2014). Gastrointestinal symptoms in Autism Spectrum Disorder: A literature review. Review Journal of Autism and Developmental Disorders, 1(1), 11-17. Link to article
Mannion, A., & Leader, G. (2014). Attention-deficit/hyperactivity disorder (AD/HD) in autism spectrum disorder. Research in Autism Spectrum Disorders, 8(4), 432-439. Link to article
Mannion, A., & Leader, G. (2014). Sleep Problems in Autism Spectrum Disorder: A literature review. Review Journal of Autism and Developmental Disorders, 1(2), 101-109. Link to article
Foody, C., James, J. E., & Leader, G. (2014). Parenting stress, salivary biomarkers, and ambulatory blood pressure in mothers of children with Autism Spectrum Disorders. Research in Autism Spectrum Disorders, 8(2), 99-110. Link to article
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2013
Healy, O., Brett, D., & Leader, G. (2013). A comparison of experimental functional analysis and the Questions About Behavioral Function (QABF) in the assessment of challenging behavior of individuals with autism. Research in Autism Spectrum Disorders, 7(1), 66-81. Link to article
Mannion, A. & Leader, G. (2013). An analysis of the predictors of comorbid psychopathology, gastrointestinal symptoms and epilepsy in children and adolescents with autism spectrum disorder. Research in Autism Spectrum Disorders, 7(12), 1663-1671. Link to article
Mannion, A., & Leader, G. (2013). Comorbidity in autism spectrum disorder: A literature review. Research in Autism Spectrum Disorders, 7(12),1595-1616. Link to article
Mannion, A., Leader, G., & Healy, O. (2013). An investigation of comorbid psychological disorders, sleep problems, gastrointestinal symptoms and epilepsy in children and adolescents with Autism Spectrum Disorder. Research in Autism Spectrum Disorders, 7(1), 35-42. Link to article
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Pre-2012
Healy, O., Hughes, B. M., Leader, G., & Devlin, S. (2011). Response re: "Comparison of Behavioral Intervention and Sensory-Integration Therapy in the Treatment of Challenging Behavior". Journal of Autism and Developmental Disorders, 41, 1439-1441. Link to article
Devlin, S., Healy, O., Leader, G., & Hughes, B. M. (2011). Comparison of behavioral intervention and sensory-integration therapy in the treatment of challenging behavior. Journal of Autism and Developmental Disorders, 41, 1303-1310. Link to article
Lydon, H., Healy, O., & Leader, G. (2011). A comparison of video modeling and pivotal response training to teach pretend play skills to children with autism spectrum disorder. Research in Autism Spectrum Disorders, 5(2), 872-884. Link to article
McTiernan, A., Leader, G., Healy, O., & Mannion, A. (2011). Analysis of risk factors and early predictors of challenging behavior for children with autism spectrum disorder. Research in Autism Spectrum Disorders, 5(3), 1215-1222. Link to article
Grey I., Healy O., Leader, G., & Hayes, D (2009). Using a TIME TIMER® to increase appropriate waiting behavior in a child with developmental disabilities. Research in Developmental Disabilities, 31, 359-366. Link to article
Leader, G., Loughnane, A., McMoreland, C., & Reed, P. (2009). The effect of stimulus salience on over-selectivity. Journal of Autism and Developmental Disorders, 39(2), 330-338. Link to article
Devlin, S., Leader, G., & Healy, O. (2009). Comparison of behavioral intervention and sensory-integration therapy in the treatment of self-injurious behavior. Research in Autism Spectrum Disorders, 3(1), 223-231. Link to article
McGarrell, M., Healy, O., Leader, G., O’Connor, J., & Kenny, N. (2009). Six reports of children with autism spectrum disorder following intensive behavioral intervention using the Preschool Inventory of Repertoires for Kindergarten (PIRK®). Research in Autism Spectrum Disorders, 3(3), 767-782. Link to article
Murphy, O., Healy, O., & Leader, G., (2009). Risk factors for challenging behaviour for 157 children with autism spectrum disorder in Ireland. Research in Autism Spectrum Disorders, 3, 474-482. Link to article
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Reed, P., Broomfield, L., McHugh, L., McCausland, A. & Leader, G (2009). Extinction of over-selected stimuli causes emergence of under-selected cues in higher- functioning children with Autistic Spectrum Disorders. Journal of Autism and Developmental Disorders, 39, 290-298. Link to article
Devlin, S., Healy, O., Leader, G., & Reed, P. (2008). The analysis and treatment of problem behavior evoked by auditory stimulation. Research in Autism Spectrum Disorders, 2(4), 671-680. Link to article
Healy, O., O'Connor, J., Leader, G., & Kenny, N. (2008). Three Years of Intensive Applied Behavior Analysis: A Case Study. Journal of Early and Intensive Behavior Intervention, 5(1), 4-22. Link to article
Lydon, H., Healy, O., Leader, G., & Keohane, D. D. (2008). The effects of intensive tact instruction on three verbal operants in non-instructional settings by two children with autism. The Journal of Speech and Language Pathology and Applied Behavior Analysis, 30, 34-46. Link to article
Healy, O., Leader, G., Honan, R., Leslie, J. & Cullinan, V. (2007). Statistical Outcomes and Best Practice: A Reply. The Irish Psychologist, 34, 58-59.
Barnes-Holmes, D., Barnes-Holmes, Y., Smeets, P. M., Cullinan, V., & Leader, G. (2004). Relational frame theory and stimulus equivalence: Conceptual and procedural issues. International Journal of Psychology and Psychological Therapy, 4, 181-214. Link to article
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Leader, G., & Barnes-Holmes, D. (2001). Establishing fraction-decimal equivalence using a respondent-type training procedure. The Psychological Record, 51(1), 151-165. Link to article
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Leader, G., & Barnes-Holmes, D. (2001). Matching-to-sample and respondent-type training as methods for producing equivalence relations: Isolating the critical variable. The Psychological Record, 51, 429-444. Link to article
Leader, G., & Barnes-Holmes, D. (2000). Establishing equivalence relations using a respondent type training procedure III. The Psychological Record, 50, 63-78. Link to article
Smeets, P. M., Leader, G., & Barnes, D. (1997). Establishing stimulus classes in adults and children using a respondent-type training procedure: A follow-up study. The Psychological Record, 47(2), 285-308. Link to article
Leader, G., Barnes, D., & Smeets. P. M. (1996). Establishing equivalence relations using a respondent-type training procedure. The Psychological Record, 46(4), 685-706. Link to article
Peer-Reviewed Book Chapters
Leader, G., Casburn, M., Maher, L., Ferrari, C., Naughton, K., Wicks, T.R., & Mannion, A & Mannion, A. (2021). Populations and Problems evaluated with Functional Assessment. In J.L. Matson (Ed.), Functional Assessment for Challenging Behaviors and Mental Health Disorders. pp. 75-151. Springer, Cham, 2021.
Leader, G., & Mannion, A. (2020). Gelotophobia and Autism. In F.R. Volkmar (Ed.), Encyclopedia of Autism Spectrum Disorders (2nd ed). Springer: New York. https://doi.org/10.1007/978-1-4614-6435-8_102315-1
Leader, G., Casburn, M., Maher, L., Ferrari, C., Naughton, K., Wicks, T.R., & Mannion, A & Mannion, A. (2021). Populations and Problems evaluated with Functional Assessment. In J.L. Matson (Ed.), Functional Assessment for Challenging Behaviors and Mental Health Disorders. pp. 75-151. Springer, Cham, 2021.
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Leader, G., & Mannion, A. (2020). Gelotophobia and Autism. In F.R. Volkmar (Ed.), Encyclopedia of Autism Spectrum Disorders (2nd ed). Springer: New York. https://doi.org/10.1007/978-1-4614-6435-8_102315-1
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Mannion, A., White, K., Porter, E., Louw, J., Kirkpatrick, B., Gilroy, S., & Leader, G. (2019). Psychosis. Handbook of Intellectual Disabilities: Integrating Theory, Research and Practice. New York: Springer. In Press.​
Leader, G., & Mannion, A. (2016). Challenging Behaviors. In J.L. Matson (Ed.), Handbook of Assessment and Diagnosis of Autism Spectrum Disorder (pp.209-232). Switzerland: Springer. Link to chapter
Leader, G., & Mannion, A. (2015). Gastrointestinal disorders. In J, L. Matson (Ed.), Comorbid conditions among children with autism spectrum disorders (pp. 145-170). New York: Springer. Link to chapter
Healy, O. & Leader, G. (2010). Assessment of rituals and stereotypy. In J. L. Matson, & P. Sturmey (Eds.), International handbook of autism and pervasive developmental disorders (pp.345-366). New York: Springer. Link to chapter
Healy, O., Leader, G., & Reed, P. (2009). Applied behavior analysis and the treatment of autism spectrum disorders in the republic of Ireland. In Leon V. Berhardt (Ed.). Advances in medicine and biology (pp. 66-81). Nova Science Publishers, Inc.
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Leader, G. & Healy, O., & O’ Connor, J. (2008). Early intensive behavioural intervention in the treatment of autism. In P. Reed & Osbourne. L. (Eds.). Behavioral theories and Interventions for autism. (pp. 250-275). Arnold: London.
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Barnes, D., Smeets, P. M., & Leader, G. (1996). New Procedures for establishing emergent matching performances in children and adults: Implications for stimulus equivalence. Stimulus class formation in humans and animals. (pp.151-173). North-Holland: Elsevier. Link to chapter