An achievement test measures a student's acquisition of knowledge or skills after learning, not their potential or current performance. In contrast, diagnostic testing assesses students' pre-existing knowledge and identifies strengths and weaknesses to inform future instruction. Achievement tests typically have a fixed time limit and focus on overall performance, while diagnostic tests are informal and emphasize qualitative details without scoring.

1. Submitted to
S.Rajakumar, Asst.prof
Thiagarajar Collegfe of preceptors, Madurai-09

2. What is achievement
test?
• It is a measure of student
acquisition of skills or knowledge
following.
• Not a measure of potential to
learn, or ability to learn.
• Not a measure of whether the
student is performing
appropriately.
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3. Any test that measures
the accomplishments of
an individual after a
period of training or
learning…….
The type of ability test
that describes what a
person has learned to
do……
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6.  Educational diagnostic testing is
a form of assessment that
occurs before instructor begins.
 The purpose of administering
tests is to try to determine what
students already know about the
concept and skills to be covered
by instruction.
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 Assess problem areas of
learning (e.g., learning
disabilities)
 Assess personal and
social skills, neurological
and motor growth,
language development,
and adaptive behavior.

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9. DIFFERENCE BETWEEN
ACHIEVEMENT AND DIAGNOSITC
TEST
ACHIEVEMENT TEST
• It is used to test a students
general ability how well the
students are at achieving
the objectives of the course.
• Wide content area
DIAGNOSTIC TEST
• It is used to identify students
strength and weakness.
Intended to ascertain what
further teaching is necessary.
• Focus on difficult area
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10. ACHIEVEMENT TEST
Complex items.
Total score is important.
Quantitative in nature.
No attention to minute details.
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DIAGNOSTIC TEST
Simple items.
No scoring.
Qualitative in nature.
Attention to minute details.

11. ACHIEVEMENT TEST
Fixed time limit.
Follow norms.
Specified number of test items.
Independent test.
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DIAGNOSTIC TEST
No time limit.
No norms.
Test items repetitive.
Always follows an achievement test.