AN ANALYSIS OF DIFFERENCES BETWEEN THE USE OF VISUAL AIDS, NO AID AND NON-VISUAL

(AURAL) AID IN PERFORMANCE OF A VOLLEYBALL SERVE AND

BASEBALL PITCH.

Investigators:Leon Blazer

Jerad Thompson

SERVING/PITCHING ANALYSIS

Purpose: Analyze current methods of teaching pitching and serving

using visual aids Desired Effects

Rope placed 14 inches above top tape of net (102 inches from ground

String placed so that is hangs 16 inches above the front of home plate.

Problems with Game-like transfer

Possible Solution Laser device Benefit (sound vs. visual) Possible downsides Marketable?

SERVING/PITCHING ANALYSIS

Methods: Participants How Selected? Set-up for each study

Rope/String, Panasonic Handi-Cam, Canon GL2 digital camcorder, 2 Dell laptops, Kinovea

Serving 8-12 Participants 8 days of filming Target 200 serves with and without visual

aid (rope) Rope placed 102 inches from ground or

approximately 14 inches above top tape of volleyball net

Rope spans two courts, analysis only on court nearest to net cam

Two cameras used: Sync cameras to record individual serving results

After trial period, employ use of laser device which will give aural (sound) feedback to alert server if target serve height is reached

Pitching

RESULTS - SERVING

234 total serves (151 with rope, 83 without)

RESULTS - PITCHING

DISCUSSION - SERVING

Differences with/without rope Problems encountered

Why less data points Video speed problems Data capabilities of Kinovea

Frame advance Camera Set-up

Camera Set-up

DISCUSSION - SERVING

Differences with/without rope Problems encountered

Why less data points Video speed problems Data capabilities of Kinovea

Frame advance Camera Set-up Data Mapping

Data Mapping