Developmental Test of Visual Perception–Adolescent and Adult (DTVP-A)
Cecil R. Reynolds, Nils A. Pearson, Judith K. Voress
· Ages: 11-0 through 74-11 Years
· Testing Time: 25 minutes
· Administration: Individual
The DTVP-A is a battery of six subtests that measure different but interrelated visual-perceptual and visual-motor abilities. The battery has empirically established reliability and validity. The normative sample consists of 1,664 adolescents and adults residing in 19 U.S. states; demographic characteristics approximate the current census data.
The DTVP-A is the latest test based on the work of Marianne Frostig. It can be administered by psychologists, neuropsychologists, occupational therapists, physical therapists, regular and special educators, and diagnosticians who are interested in examining the visual-perceptual status and visual-motor integration skills of adolescents and adults.
The DTVP-A is especially useful in the evaluation of the neuropsychological integrity of TBI and stroke patients where right-hemisphere function may be at issue.
The subtests are Copying, Figure-Ground, Visual-Motor Search, Visual Closure, Visual-Motor Speed, and Form Constancy
Composite Scores or Indexes The most reliable scores for the DTVP-A are the indexes. These scores are found by adding the standard scores of the subtests that comprise a composite and converting the sum to an index.
· General Visual-Perceptual Index: The GVPI is the best measure of what the majority of people mean when they say "visual perception." Data from six subtests, each of which measures a different type of visual perception in a different manner, contribute to the GVPI. When GVPIs are below 90, examiners need to pay more attention to the clinically important indexes- the Motor-Reduced Visual Perceptual Index (MRPI) and the Visual-Motor Integration Index (VMII). Examination of these indexes may help explain the causes for low GVPIs.
· Motor-Reduced Visual Perception Index: Of all of the DTVP-A indexes, the MRPI is the "purest" and most direct measure of visual perception in that only minimal motor skills (e.g., pointing) are required to show perceptual competence. This index is formed by combining the standard scores from the Figure-Ground, Visual Closure, and Form Constancy Subtests.
· Visual-Motor Integration Index: To do well on this composite, individuals must perform complex eye-hand coordination tasks. Low scores do not necessarily indicate poor visual perception; they may mean that the individuals have awkward hand movements or that they have difficulty coordinating hand-to-eye movements. This index is formed by combining the standard scores of the Copying, Visual-Motor Search, and Visual-Motor Speed Subtests.
Special Features of the DTVP-A
· Subtests were developed to be appropriate for adolescents and adults.
· The normative sample reflects the current population characteristics of the United States relative to race, ethnicity, gender, geographic region, parent education, and income.
· Internal consistency, stability, and interscorer reliability for all indexes are high.
· Validity evidence shows that all DTVP-A subtests and indexes are useful for measuring visual-perceptual and visual-motor integration skills.
· Evidence is provided to show that the test is unbiased with respect to gender and race.
COMPLETE DTVP-A KIT INCLUDES: Examiner's Manual, Picture Book, 25 Profile/Examiner Record Forms, and 25 Response Booklets, all in a sturdy storage box. (©2002)
10350...DTVP-A Complete Kit
10351...DTVP-A Examiner’s Manual
10352...DTVP-A Picture Book
10353...DTVP-A Profile/Examiner Record Forms (25)
10354...DTVP-A Response Booklets (25)