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The Dutch Technical-Tactical Tennis Test (D4T) for Talent Identification and Development: Psychometric Characteristics

View Article: PubMed Central - PubMed

ABSTRACT

This study examined the test-retest reliability, validity and feasibility of the newly developed Dutch Technical-Tactical Tennis Test (D4T). This new test is relevant for talent identification and development in tennis. Thirty-two youth male tennis players (age 13.4 ± 0.5) were classified as elite (n = 15) or sub-elite (n = 17) according to their position on the national youth ranking list under 15 years (cut-off rank 50) in the Netherlands. Games, rallies and different tactical situations (i.e. offensive, neutral and defensive) were simulated with a ball machine. Players had to return 72 balls to predetermined target areas. Stroke quality was recorded based on ball velocity and accuracy (VA-index), as well as percentage errors. Test-retest reliability was assessed by comparing differences between the first and second test-session (n = 10). An intraclass-correlation coefficient of .78 for the VA-index was found (p < .05), indicating excellent test-retest reliability. Independent t-tests revealed that elite players outscored sub-elite players for the VA-index, ball velocity, accuracy and percentage errors (p < .05), supporting good validity. Furthermore, a high correlation was found between the VA-index and individual positions on the youth ranking list (p = -.75; p < .001). The assessment of feasibility indicated that the D4T was applicable for instructors and coaches. In conclusion, the D4T was shown to be a reliable, valid and feasible test to measure technical-tactical characteristics of tennis performance in youth players.

No MeSH data available.


Representation of the (▲) offensive, (■) neutral and (●) defensive tactical situation and the complete test design. The forms represent the three ball projections in the tactical situations.
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j_hukin-2017-0012_fig_002: Representation of the (▲) offensive, (■) neutral and (●) defensive tactical situation and the complete test design. The forms represent the three ball projections in the tactical situations.

Mentions: Each game was divided into two offensive, two neutral and two defensive rallies, representing different tactical situations as displayed in Picture 2. Offensive rallies consisted of three ball projections just beyond the service line. Neutral rallies comprised three ball projections to the area around the middle of the court approximately one meter before the baseline, and defensive rallies included three ball projections to the sideline and beyond the service line. The velocity of the ball projections was approximately 70, 75 and 80 km/h, in the offensive, neutral and defensive rallies, respectively. The time interval between the ball projections was 2.5 s in each tactical situation.


The Dutch Technical-Tactical Tennis Test (D4T) for Talent Identification and Development: Psychometric Characteristics
Representation of the (▲) offensive, (■) neutral and (●) defensive tactical situation and the complete test design. The forms represent the three ball projections in the tactical situations.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC5304281&req=5

j_hukin-2017-0012_fig_002: Representation of the (▲) offensive, (■) neutral and (●) defensive tactical situation and the complete test design. The forms represent the three ball projections in the tactical situations.
Mentions: Each game was divided into two offensive, two neutral and two defensive rallies, representing different tactical situations as displayed in Picture 2. Offensive rallies consisted of three ball projections just beyond the service line. Neutral rallies comprised three ball projections to the area around the middle of the court approximately one meter before the baseline, and defensive rallies included three ball projections to the sideline and beyond the service line. The velocity of the ball projections was approximately 70, 75 and 80 km/h, in the offensive, neutral and defensive rallies, respectively. The time interval between the ball projections was 2.5 s in each tactical situation.

View Article: PubMed Central - PubMed

ABSTRACT

This study examined the test-retest reliability, validity and feasibility of the newly developed Dutch Technical-Tactical Tennis Test (D4T). This new test is relevant for talent identification and development in tennis. Thirty-two youth male tennis players (age 13.4 ± 0.5) were classified as elite (n = 15) or sub-elite (n = 17) according to their position on the national youth ranking list under 15 years (cut-off rank 50) in the Netherlands. Games, rallies and different tactical situations (i.e. offensive, neutral and defensive) were simulated with a ball machine. Players had to return 72 balls to predetermined target areas. Stroke quality was recorded based on ball velocity and accuracy (VA-index), as well as percentage errors. Test-retest reliability was assessed by comparing differences between the first and second test-session (n = 10). An intraclass-correlation coefficient of .78 for the VA-index was found (p < .05), indicating excellent test-retest reliability. Independent t-tests revealed that elite players outscored sub-elite players for the VA-index, ball velocity, accuracy and percentage errors (p < .05), supporting good validity. Furthermore, a high correlation was found between the VA-index and individual positions on the youth ranking list (p = -.75; p < .001). The assessment of feasibility indicated that the D4T was applicable for instructors and coaches. In conclusion, the D4T was shown to be a reliable, valid and feasible test to measure technical-tactical characteristics of tennis performance in youth players.

No MeSH data available.