Chris Hollis
Biographic Data
| ID | 5010692 |
|---|---|
| NAME | Chris Hollis |
| GIVEN NAMES | Chris |
| FAMILY NAME | Hollis |
| SIGNATURE | HOLLIS C |
| AFFILIATIONS | University of Nottingham |
| ORCID | 0000-0003-1083-6744 |
| VERIFIED | Yes |
| TOTAL WORKS | 15 |
| TOTAL CITATIONS | 4 |
| AUTHOR COUNT | 15 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1928 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Commentary
Individuals with attention‐deficit/hyperactivity disorder (ADHD) exhibit varied responses to pharmacological treatments (e.g. stimulants and non‐stimulants). Accurately and promptly detecting treatment‐related improvements, response failure, or deterioration poses significant challenges, as current monitoring primarily relies on subjective ratings. In this commentary, we critically evaluate the evidence supporting the use of QbTest for objectivel…
‘ Co‐Production Is Caring ’
BACKGROUND: While co-production is increasingly emphasised in youth mental health research, few studies have explored how young people themselves conceptualise and evaluate responsible and dialogic co-production. Understanding young people's perspectives is essential to ensure that participation is meaningful and protective, rather than tokenistic or exploitative. This paper offers a retrospective reflection on a 3-year UK youth mental health pro…
Practitioner Review
A comparison of visual attention to pictures in the Autism Diagnostic Observation Schedule in children and adolescents with ADHD and/or autism
Our findings provide preliminary evidence in support of implementing visual attention measurement during assessment of ASD in the context of comorbidity with ADHD. For example, if a child with ADHD was found to reduce attention to faces in ADOS pictures this may suggest additive difficulties on the autism spectrum. Replication across a larger sample would be informative. This work has future potential in the clinic to help with complex cases, inc…
Long‐term clinical and cost‐effectiveness of a therapist‐supported online remote behavioural intervention for tics in children and adolescents
BACKGROUND: Little is known about the long-term effectiveness of behavioural therapy for tics. We aimed to assess the long-term clinical and cost-effectiveness of online therapist-supported exposure and response prevention (ERP) therapy for tics 12 and 18 months after treatment initiation. METHODS: ORBIT (online remote behavioural intervention for tics) was a two-arm (1:1 ratio), superiority, single-blind, multicentre randomised controlled trial …
The Covid-19 pandemic and its impact on tic symptoms in children and young people
To understand how children and young people with tic disorders were affected by COVID-19, we compared pre and during pandemic scores on the Yale Global Tic Severity Scale (YGTSS). Participants were young people (N = 112; male:78%; 9-17 years) randomised to the control arm of the "ORBIT-Trial" (ISRCTN70758207, ClinicalTrials.gov-NCT03483493). For this analysis, the control arm was split into two groups: one group was followed up to 12-months' post…
The World Federation of ADHD International Consensus Statement
BACKGROUND: Misconceptions about ADHD stigmatize affected people, reduce credibility of providers, and prevent/delay treatment. To challenge misconceptions, we curated findings with strong evidence base. METHODS: We reviewed studies with more than 2000 participants or meta-analyses from five or more studies or 2000 or more participants. We excluded meta-analyses that did not assess publication bias, except for meta-analyses of prevalence. For net…
Reduced Prefrontal Gyrification in Carriers of the Dopamine D4 Receptor 7-Repeat Allele With Attention Deficit/Hyperactivity Disorder
Objective: Structural and functional abnormalities have been noted in the prefrontal cortex of individuals with neurodevelopmental disorders such as attention deficit/hyperactivity disorder (ADHD). Cortical thickness and gyrification, both of which have been reported as abnormal in the prefrontal cortex in ADHD, are thought to be modulated by genetic influences during neural development. This study aimed to investigate the effects of a polymorphi…
Comparative efficacy and tolerability of medications for attention-deficit hyperactivity disorder in children, adolescents, and adults
The effects of improving sleep on mental health (Oasis)
BACKGROUND: Sleep difficulties might be a contributory causal factor in the occurrence of mental health problems. If this is true, improving sleep should benefit psychological health. We aimed to determine whether treating insomnia leads to a reduction in paranoia and hallucinations. METHODS: We did this single-blind, randomised controlled trial (OASIS) at 26 UK universities. University students with insomnia were randomly assigned (1:1) with sim…
Annual Research Review
BACKGROUND: Digital health interventions (DHIs), including computer-assisted therapy, smartphone apps and wearable technologies, are heralded as having enormous potential to improve uptake and accessibility, efficiency, clinical effectiveness and personalisation of mental health interventions. It is generally assumed that DHIs will be preferred by children and young people (CYP) given their ubiquitous digital activity. However, it remains uncerta…
Remote monitoring of Attention-Deficit Hyperactivity Disorder (ADHD) symptoms using mobile phone technology
Introduction: Attention Deficit-Hyperactivity Disorder (ADHD) is characterised by developmentally inappropriate and impairing levels of inattention, hyperactivity and impulsivity. ADHD affects between 3-5% of school aged children and young people in the UK, with an increased awareness that these symptoms typically continue into adulthood. NICE Guidance recommends medication for the treatment of severe ADHD. During the medication initiation and ti…
Evaluating the effectiveness of a schools-based programme to promote exercise self-efficacy in children and young people with risk factors for obesity
ISRCTN Register no. ISRCTN12650001
Cognitive processes in children's reading and attention
Children experiencing attention difficulties have documented cognitive deficits in working memory (WM), response inhibition and dual tasks. Recent evidence suggests however that these same cognitive processes are also closely associated with reading acquisition. This paper therefore explores whether these variables predicted attention difficulties or reading among 123 children with and without significant attention problems sampled from the schoo…
The Balance of Power
I have just been reading an extremely interesting book by Dr. McNair Wilson, called Napoleon the Man. The book gives a picture of Napoleon which, the author claims in his preface, has never before been given in the English language. The claim is, I fancy, a just one; although, if he had written his book in French, it would have been hardly possible for him to establish so large a title to originality. For the thesis which Dr. Wilson urges upon us…
Cognitive processes in children's reading and attention
Children experiencing attention difficulties have documented cognitive deficits in working memory (WM), response inhibition and dual tasks. Recent evidence suggests however that these same cognitive processes are also closely associated with reading acquisition. This paper therefore explores whether these variables predicted attention difficulties or reading among 123 children with and without significant attention problems sampled from the schoo…
The Balance of Power
I have just been reading an extremely interesting book by Dr. McNair Wilson, called Napoleon the Man. The book gives a picture of Napoleon which, the author claims in his preface, has never before been given in the English language. The claim is, I fancy, a just one; although, if he had written his book in French, it would have been hardly possible for him to establish so large a title to originality. For the thesis which Dr. Wilson urges upon us…
Cognitive processes in children's reading and attention
Children experiencing attention difficulties have documented cognitive deficits in working memory (WM), response inhibition and dual tasks. Recent evidence suggests however that these same cognitive processes are also closely associated with reading acquisition. This paper therefore explores whether these variables predicted attention difficulties or reading among 123 children with and without significant attention problems sampled from the schoo…
Evaluating the effectiveness of a schools-based programme to promote exercise self-efficacy in children and young people with risk factors for obesity
ISRCTN Register no. ISRCTN12650001
Remote monitoring of Attention-Deficit Hyperactivity Disorder (ADHD) symptoms using mobile phone technology
Introduction: Attention Deficit-Hyperactivity Disorder (ADHD) is characterised by developmentally inappropriate and impairing levels of inattention, hyperactivity and impulsivity. ADHD affects between 3-5% of school aged children and young people in the UK, with an increased awareness that these symptoms typically continue into adulthood. NICE Guidance recommends medication for the treatment of severe ADHD. During the medication initiation and ti…
The effects of improving sleep on mental health (Oasis)
BACKGROUND: Sleep difficulties might be a contributory causal factor in the occurrence of mental health problems. If this is true, improving sleep should benefit psychological health. We aimed to determine whether treating insomnia leads to a reduction in paranoia and hallucinations. METHODS: We did this single-blind, randomised controlled trial (OASIS) at 26 UK universities. University students with insomnia were randomly assigned (1:1) with sim…
Annual Research Review
BACKGROUND: Digital health interventions (DHIs), including computer-assisted therapy, smartphone apps and wearable technologies, are heralded as having enormous potential to improve uptake and accessibility, efficiency, clinical effectiveness and personalisation of mental health interventions. It is generally assumed that DHIs will be preferred by children and young people (CYP) given their ubiquitous digital activity. However, it remains uncerta…
Comparative efficacy and tolerability of medications for attention-deficit hyperactivity disorder in children, adolescents, and adults
Reduced Prefrontal Gyrification in Carriers of the Dopamine D4 Receptor 7-Repeat Allele With Attention Deficit/Hyperactivity Disorder
Objective: Structural and functional abnormalities have been noted in the prefrontal cortex of individuals with neurodevelopmental disorders such as attention deficit/hyperactivity disorder (ADHD). Cortical thickness and gyrification, both of which have been reported as abnormal in the prefrontal cortex in ADHD, are thought to be modulated by genetic influences during neural development. This study aimed to investigate the effects of a polymorphi…
The World Federation of ADHD International Consensus Statement
BACKGROUND: Misconceptions about ADHD stigmatize affected people, reduce credibility of providers, and prevent/delay treatment. To challenge misconceptions, we curated findings with strong evidence base. METHODS: We reviewed studies with more than 2000 participants or meta-analyses from five or more studies or 2000 or more participants. We excluded meta-analyses that did not assess publication bias, except for meta-analyses of prevalence. For net…
The Covid-19 pandemic and its impact on tic symptoms in children and young people
To understand how children and young people with tic disorders were affected by COVID-19, we compared pre and during pandemic scores on the Yale Global Tic Severity Scale (YGTSS). Participants were young people (N = 112; male:78%; 9-17 years) randomised to the control arm of the "ORBIT-Trial" (ISRCTN70758207, ClinicalTrials.gov-NCT03483493). For this analysis, the control arm was split into two groups: one group was followed up to 12-months' post…
Long‐term clinical and cost‐effectiveness of a therapist‐supported online remote behavioural intervention for tics in children and adolescents
BACKGROUND: Little is known about the long-term effectiveness of behavioural therapy for tics. We aimed to assess the long-term clinical and cost-effectiveness of online therapist-supported exposure and response prevention (ERP) therapy for tics 12 and 18 months after treatment initiation. METHODS: ORBIT (online remote behavioural intervention for tics) was a two-arm (1:1 ratio), superiority, single-blind, multicentre randomised controlled trial …
Practitioner Review
A comparison of visual attention to pictures in the Autism Diagnostic Observation Schedule in children and adolescents with ADHD and/or autism
Our findings provide preliminary evidence in support of implementing visual attention measurement during assessment of ASD in the context of comorbidity with ADHD. For example, if a child with ADHD was found to reduce attention to faces in ADOS pictures this may suggest additive difficulties on the autism spectrum. Replication across a larger sample would be informative. This work has future potential in the clinic to help with complex cases, inc…
Commentary
Individuals with attention‐deficit/hyperactivity disorder (ADHD) exhibit varied responses to pharmacological treatments (e.g. stimulants and non‐stimulants). Accurately and promptly detecting treatment‐related improvements, response failure, or deterioration poses significant challenges, as current monitoring primarily relies on subjective ratings. In this commentary, we critically evaluate the evidence supporting the use of QbTest for objectivel…
‘ Co‐Production Is Caring ’
BACKGROUND: While co-production is increasingly emphasised in youth mental health research, few studies have explored how young people themselves conceptualise and evaluate responsible and dialogic co-production. Understanding young people's perspectives is essential to ensure that participation is meaningful and protective, rather than tokenistic or exploitative. This paper offers a retrospective reflection on a 3-year UK youth mental health pro…
Psychology (12 works) · Medicine (8 works) · Psychiatry (8 works) · Attention Deficit Hyperactivity Disorder (6 works) · Clinical Psychology (6 works) · Developmental psychology (5 works) · Cognition (4 works) · Neuroscience (4 works) · Clinical Psychology (3 works) · Digital Mental Health Interventions (3 works)