Introduction
Introduction Statistics Contact Development Disclaimer Help
ERIC ED384402: Paths to Success, Volume III. Validating the Califor...
by ERIC
Thumbnail
Download
Web page
The California Chemistry Diagnostic Test (CCDT) was
developed by chemistry faculties at the University of
California, California State University, and California
Community College systems to address dissatisfaction with
existing chemistry assessment instruments. The instrument
was tested at 25 campuses of the 3 systems, after which
Glendale Community College (GCC) undertook a project to
validate the test locally by comparing test scores with
students' final grades. The validation procedure examined
the test's content-related and criterion-related
validity, reliability, disproportionate impact and bias,
and cut scores. For the systemwide validation, a
comparison of test scores and final chemistry grades for
4,023 students showed a Pearson correlation coefficient
of .42, exceeding the minimum standard of .35 established
by the Office of the Chancellor. The local validation at
GCC included 228 students and also resulted in a
coefficient of .42, indicating that the CCDT score was a
significant predictor of chemistry performance. The test
was also found to have a high reliability in both the
statewide and the local validations. With respect to test
bias, while both the statewide and local validations
found small but statistically significant differences for
gender and ethnic groups; the differences were considered
to be too small, however, to be attributable to the
instrument. (A definition of terms and suggested cut
scores are included.) (KP)
Date Published: 2014-10-13 12:27:58
Identifier: ERIC_ED384402
Item Size: 21835167
Language: english
Media Type: texts
# Topics
ERIC Archive; Chemistry; Community Co...
# Collections
ericarchive
additional_collections
# Uploaded by
@chris85
# Similar Items
View similar items
PHAROS
You are viewing proxied material from tilde.pink. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.