Viewing Strategy Training in Children With (Cerebral) Visual Impairment
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age5-12
SponsorRoyal Dutch Visio
About this trial
Viewing strategies are strategies used to process visual Information. Many children with visual impairment seem to lack systematic viewing strategies. However, it is unknown how viewing strategies differ between children with normal vision and children with (cerebral) visual impairment. In addition, viewing strategy training is often adopted in clinical practice, but till date there is no scientific evidence about effectiveness of this approach.
The current project has two goals: (1) to measure viewing strategies used by children with normal vision, children with ocular visual impairment and children with CVI, and (2) to evaluate whether training viewing strategies results in more efficiënt visual Information processing.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Age 5-12 years
linear distant visual acuity of 0.1 logMAR or better
Verbal IQ above 70
Absence of developmental disorders or psychiatric problems like ASS or AD(H)D
Disqualifiers
Children with VI: linear near visual acuity >1.0 logMAR
Children with visual field defect < 30 degrees
Children with a verbal IQ below 70
Children who attended a form of vision training in the past two years
Trial design
Design model
Parallel
Treatments tested in this trial
Viewing strategy training
BehavioralChildren receive a visual training of viewing strategies (six weeks, 2 times a week, 30 minutes). During the training, children are instructed to use specific viewing strategies (looking in a structured direction which fits the task at hand, zooming in and out / change of visual selective attentional field, visual discrimination). The verbal instructions and exercises are protocol-based. A textbook is used to describe the reactions of the children during training.
Treatment groups
60 Participants
are divided into 2 treatment groupsGroup A: Group A) early training groupExperimental treatment 1 intervention
Group B: Group B) late training groupExperimental treatment 1 intervention
Trial outcomes
Primary outcomes
1
Changes in reading accuracy after viewing strategy training
Radner reading test
Time frame
Group A: Day 0, Month 2, Month 8; group B: Day 0, Month 2, Month 42
Changes in reading speed after viewing strategy training
Radner reading test
Time frame
Group A: Day 0, Month 2, Month 8; group B: Day 0, Month 2, Month 43
Changes in visual search accuracy after training
Accuracy during conjunction search
Time frame
Group A: Day 0, Month 2, Month 8; group B: Day 0, Month 2, Month 44
Changes in visual search speed after training
Speed during conjunction search
Time frame
Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4Secondary outcomes
1
Changes in WISC-V visual processing speed index (VSI) after training
WISC-IV visual processing speed index
Time frame
Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 42
Changes in local visual selective attention after training
TEA-Ch Speurtocht (total number of symbols found in 1 minute)
Time frame
Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 43
Changes in global visual selective attention after training
Gestalt Closure (Kaufman-ABC), number of correct answers
Time frame
Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 44
Changes in visual identification speed after training
'DST-Plaatjes Benoemen', number of pictures correctly named within 1 minute
Time frame
Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4Sponsors and contacts
Click on the lead sponsor to view all of their trials.
Royal Dutch Visio
Lead sponsor
Radboud University, Behavioural Science Institute, Nijmegen, The Netherlands
Collaborator
Source ClinicalTrials.gov