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

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

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

Mallard Jersey Auction

On March 17, 2013, the Quad City Mallard’s Jersey Auction contributed $19,745 toward purchase of the Dynavision equipment!

Dynavision Video

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.

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

Methodology

• Cross-sectional, descriptive• 300 participants

– 100 in each of the three age categories

• Inclusion Criteria• Exclusion Criteria

Recruitment

• Flyers• Local newspaper articles• Newsletters• Word-of-mouth to families and patients in the

Outpatient Physical Rehabilitation facility

WE NEED YOU!!!!

Data Collection

• Initial Intake Form• Informed Consent• Standard Screening Form (i.e., past

medical history, ROM screen)• Dynavision Reaction Speed Test

– Practice– Recorded Results

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.

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

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

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

Volunteers

• Data collection began Fall 2014.

• We have completed 1/3 of the study!!!

• Call 421-3460 to set up an appointment to volunteer!

Questions!!!