Related Experiment Video
Updated: May 5, 2026
Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities
Published on: September 11, 2021
The Equity Perception Scale - Intellectual Disability Services (EPS-IDS): evaluating the reliability and validity of
Philip Disley1, Chris Hatton, Dave Dagnan
1Lancaster University , UK.
Background:
The aim of this paper was to evaluate the reliability and validity of the Equity Perception Scale - Intellectual Disability Services (EPS-IDS), a detailed measure of staff equity perceptions in services for people with intellectual disability (ID). The EPS-IDS contains 3 relationship indices that assess staff relationships with their employing organisation, their co-workers, and service users.
Method:
Postal questionnaires were used to collect quantitative data from a purposive sample of ID service staff.
Results:
The EPS-IDS was found to have good internal consistency reliability. The overall test-retest reliability of the measure, however, was found to be less satisfactory. With the exception of the co-worker relationship index, the EPS-IDS indices were found to have promising validity.
Conclusions:
The findings from the study suggest that the EPS-IDS shows some promise as a measure of the equity perceptions of ID service staff. Further refinements to the relationship indices, however, may be required.
Related Concept Videos
01:22Self-Report Tests of Personality
01:29Measures of Intelligence
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this;...
01:23Wechsler's Contribution to Measures of Intelligence
01:26Equity Theory
01:28Self-Esteem
01:29Intellectual Disability