Instrumentation in pychometric

1. PYCHOMETRIC INSTRUMENT
600 LEVEL
MOHAMMED, A. Hauwa

2. Sunday, December 28, 2025
Definition
• Psychometric instruments are tools used to measure psychological
constructs, such as personality traits, intelligence, or aptitude.
• Common examples include the Myers-Briggs Type Indicator (MBTI) for
personality, the Wechsler Intelligence Scales for intelligence, and the
Beck Depression Inventory for assessing depressive symptoms

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Psychometric properties of Instrument
Reliability
The consistency and stability of the instrument over
time. High reliability indicates that the instrument
produces consistent results.

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Types
• Test-Retest Reliability: Measures the consistency of scores when the
same individuals are tested at different times.
• Internal Consistency: Assesses the extent to which items within the
instrument are correlated, indicating how well they measure the
same underlying construct.
• Inter-Rater Reliability: Relevant when multiple raters are involved,
ensuring consistency in their judgments.

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•Validity
The extent to which the instrument measures what it is
intended to measure. Validity assesses the accuracy
and meaningfulness of the instrument's results.

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Types of Validity
• Construct Validity: Demonstrates that the instrument measures the
intended theoretical construct accurately.
TYPES OF CONSTRUCT VALIDILITY
Convergent Validity: Shows a strong correlation between the
instrument and other measures assessing the same or a similar
construct.
Discriminant Validity: Demonstrates that the instrument is distinct
from measures of unrelated constructs.

7. •Content Validity: Ensures that the instrument
adequately covers all aspects of the construct
it aims to measure.
•Criterion-Related Validity: Establishes a
relationship between the instrument's scores
and an external criterion, demonstrating
predictive or concurrent validity.

8. •Predictive Validity: How well a test predicts future
performance.
•Concurrent Validity: How well a test correlates with a
current criterion.
Types of Criterion-Related Validity

13. PHQ-9
Total Score:
1-4 Minimal
depression
5-9 Mild depression
10-14 Moderate
depression
15-19 Moderately
severe
20-27 Severe
depression Multiple lan

19. SLEEP DISORDER SCALE

20. Dissociative Symptoms Scale (DSS)

21. Intelligence
• Wechsler Preschool and Primary Scale of Intelligence (WPPSI):
Designed for children aged 2 years 6 months to 7 years 7 months.
• Wechsler Intelligence Scale for Children (WISC): Designed for children
aged 6 to 16 years.
• Wechsler Adult Intelligence Scale (WAIS): Designed for individuals
aged 16 to 90.
• Stanford-Binet Intelligence Scales
• Raven's Progressive Matrices

22. Personality
 Minnesota Multiphasic Personality Inventory
(MMPI)
 NEO Personality Inventory-Revised (NEO-PI-R)
 Myers-Briggs Type Indicator (MBTI)