Related Experiment Video
Updated: May 6, 2026

Development of a Virtual Reality Assessment of Everyday Living Skills
Published on: April 23, 2014
Reliability and validity of the ''personal well-being index- cognitive disability'' on mentally retarded students
Alireza Agha Yousefi1, Kambiz Mozaffari, Nasim Sharif
1Associate Professor of Psychology Payam-e-Noor University, Tehran, Iran.
Objective:
Having a good quality of life has always been desirable for humans, and the concept of a good life and the ways of achieving it have become important over the years. Personal wellbeing is the mental component of quality of life. Thus, the current study was conducted to assess the reliability and validity of the ''Personal Well-Being Index- Cognitive Disability'' on mentally retarded students.
Method:
200 mentally retarded students in north districts of Tehran (districts 1, 2 and 3) were selected by systematic random sampling. The collected data using Personal Well-Being Index- Cognitive Disability was analyzed by Cronbach's alpha coefficient for internal consistency and linear multivariate regression for construct validity.
Results:
Results confirmed the reliability and validity for the Personal Well-Being Index- Cognitive Disability in mentally retarded students of exceptional schools. Studying the internal consistency of seven items showed that all the items were correlated with the total score and their scores averages were similar to each other. This indicates that the test's questions have reliability with regard to evaluation of a common feature and results showed Personal Well-Being Index- Cognitive Disability had the most extensive coverage of construct validity.
Conclusion:
Personal Well-Being Index- Cognitive Disability scale could be applied to measure personal wellbeing in mentally retarded students.
More Related Videos
Related Concept Videos
Reliability and Validity
Self-Report Tests of Personality
Information Processing Approach
Wechsler's Contribution to Measures of Intelligence
Self-Esteem
Intellectual Disability

