Viewing Strategy Training in Children With (Cerebral) Visual Impairment

Not Applicable

Recruiting

• Conditions: Vision, Low; Vision Disorders

• Registration Number: NCT05600140
• Lead Sponsor: Royal Dutch Visio

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2022-07-12
• Study First Submitted QC: 2022-10-26
• Study First Posted: 2022-10-31
• Study Start: 2024-03-06
• Status Verified: 2024-04
• Last Update Submitted: 2024-04-09
• Last Update Posted: 2024-04-11
• Primary Completion: 2026-06
• Study Completion: 2026-09

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Changes in visual search accuracy after training	Group A: Day 0, Month 2, Month 8; group B: Day 0, Month 2, Month 4	Accuracy during conjunction search
Changes in reading accuracy after viewing strategy training	Group A: Day 0, Month 2, Month 8; group B: Day 0, Month 2, Month 4	Radner reading test
Changes in reading speed after viewing strategy training	Group A: Day 0, Month 2, Month 8; group B: Day 0, Month 2, Month 4	Radner reading test
Changes in visual search speed after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	Speed during conjunction search
Changes in saccade amplitudes during reading and visual search after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	Saccade amplitudes measured using Radner reading test and conjunction search
Changes in fixation duration during reading and search after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	Fixation durations measured using Radner reading test and conjunction search
Changes in average distance between fixation points during conjunction search (EB-VSA) after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	Average distance between fixation points using Radner reading test and conjunction search

Secondary Outcome Measures

Name	Time	Method
Changes in local visual selective attention after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	TEA-Ch Speurtocht (total number of symbols found in 1 minute)
Changes in global visual selective attention after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	Gestalt Closure (Kaufman-ABC), number of correct answers
Changes in visual identification speed after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	'DST-Plaatjes Benoemen', number of pictures correctly named within 1 minute
Changes in WISC-V visual processing speed index (VSI) after training	Group A: Day 0, Month 2, Month 8; Group B: Day 0, Month 2, Month 4	WISC-IV visual processing speed index

Trial Locations

Locations (1)

Royal Dutch Visio; 🇳🇱 Nijmegen, Netherlands