FREE ESSAY ON EXPRESSIVE ONE WORD PICTURE VOCABULARY TEST

EXPRESSIVE ONE WORD PICTURE VOCABULARY TEST

The purpose of the Expressive One Word Picture Vocabulary Test is to obtain a basal
estimate of a child's verbal intelligence. The test provides valuable information about
speech and learning disorders, English as a second language, and auditory processing.
The EOWPVT can be administered by a variety of professionals. Examiners should have some
training in the administration and interpretation of educational/psychological tests. The
test itself consists of 100 drawings of common objects. The examiner presents pictures
one at a time to the child. The students' task is to name the object shown. Presenting a
picture matching the child's chronological age begins the test. If an error is made, a
picture corresponding with a lower chronological age is shown until the child responds
correctly to eight consecutive prompts.
This is known as the child's basal level. The testing continues until the child makes six
consecutive incorrect responses establishing the child's ceiling level.
Indices of internal consistency and standard errors of measurement are reported for the
different age levels. Explanations for these indices are provided. For a test as long as
the EOWPVT, reliability estimates are high ranging from .84 to .92 with a median
coefficient of .90. However this internal consistency is the only reliability the EOWPVT
- R offers.
The validity of inferences based on scoring on the EOWPVT indicate that the items "were
selected to represent a common core of English words". However it was also seen that the
core vocabulary was restricted to single words "which could be illustrated without
ambiguity". The EOWPVT correlates more strongly with a test of general cognitive ability
than with other measures of expressive or receptive vocabulary. Although the test is said
to be appropriate for Spanish speaking children, there is no validity evidence for this
use.