dynavision normative data for reaction time principal investigator: lori dryg, ma, ccc-slp cbis...
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Dynavision Normative Data for Reaction Time
• Principal Investigator: Lori Dryg, MA, CCC-SLP CBIS
• Sub-Investigators:
Cherie Blackwell, OTR/L, CHT; Sue Clemens, OTR/L, CBIS; Kristen Mandle, OTR/L; Kathy Cary, COTA/L; Jon Lemke, PhD
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What is the Dynavision used for?
• Originally designed as a device to improve visual skills and eye hand coordination of athletes. – Tiger Woods– Professional Hockey and Football Players
• Rehabilitation– Device provides the same training benefits to persons whose
visual and motor function has been compromised by injury or disease• Stroke• TBI• Spinal Cord Injury• ADD
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Benefits of Dynavision
• Improve visual and cognitive skills– Hemi inattention– Left neglect– Processing speed– Divided attention and concentration
• Improve Activities of Daily Living– Driving– Reading– Managing finances– School performance
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Mallard Jersey Auction
On March 17, 2013, the Quad City Mallard’s Jersey Auction contributed $19,745 toward purchase of the Dynavision equipment!
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Dynavision Video
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Research Purpose
• No established norms for Dynavision equipment.
• Establishing norms for visual reaction, physical response and motor response times will assist therapists in properly assessing and treating visual perceptual deficits.
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Study Objectives
• To determine the visual reaction speed of adults in age categories 18 – 40, 41 – 59 and 60-80 years, using the Dynavision D2 Visuomotor Training System
• To determine the physical response speed of adults in age categories 18 – 40, 41 – 59 and 60-80 years, using the Dynavision D2 Visuomotor Training System
• To determine the motor response time of adults in age categories 18 – 40, 41 – 59 and 60-80 years, using the Dynavision D2 Visuomotor Training System
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Methodology
• Cross-sectional, descriptive• 300 participants
– 100 in each of the three age categories
• Inclusion Criteria• Exclusion Criteria
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Recruitment
• Flyers• Local newspaper articles• Newsletters• Word-of-mouth to families and patients in the
Outpatient Physical Rehabilitation facility
WE NEED YOU!!!!
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Data Collection
• Initial Intake Form• Informed Consent• Standard Screening Form (i.e., past
medical history, ROM screen)• Dynavision Reaction Speed Test
– Practice– Recorded Results
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Data Analysis
• GHS Business Intelligence Center will analyze total reaction times across the 6 tasks for each age group to establish normal limits.
• Identifying the parametric distribution of the data allowed use of a 50 patient sample, opposed to 400 otherwise.
• Results to be announced upon completion of data collection.
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Initial Cohort• 50 patients age 60+
– Calculate time to complete all 6 tests
– Take reciprocal of these values
– Plot and test for normality– Find 2.5 and 97.5 percentiles
0.0480.0440.0400.0360.0320.0280.0240.020
14
12
10
8
6
4
2
0
Mean 0.03443StDev 0.005851N 50
Reciprocal Total Reaction Time (1/s)
Freq
uenc
y
Distribution of Reciprocal Reaction TimesTotal for All 6 Tests
0.0500.0450.0400.0350.0300.0250.020
99
95
90
80
7060504030
20
10
5
1
Mean 0.03443StDev 0.005851N 50AD 0.221P-Value 0.824
Reciprocal Total Reaction Time (1/s)
Perc
entile
Normality Test of Reciprocal Reaction TimesTotal for All 6 Tests
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Results of Analysis
• Lower limit (2.5th percentile) is 21.8 seconds
• Upper limit (97.5th percentile) is 43.5 seconds
• Recommend that patients age 60+ recovering from stroke complete all 6 tests in at most 43.5 seconds
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Barriers to Data Collection
• Our equipment is not portable• Conducted during regular business hours • Men are more reluctant to participate• Full time employees trying to manage caseload
and research• Convenience population fall in exclusion criteria
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Volunteers
• Data collection began Fall 2014.
• We have completed 1/3 of the study!!!
• Call 421-3460 to set up an appointment to volunteer!
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Questions!!!