Characteristics
Domains assessed:
Prose: Comprehension
Specific context:
Intellectual Disability
Validation sample population age:
Adults: 18 to 64 years
Modes of administration in validation study:
Paper and pencil
Psychometrics
Number of items:
117
Sample size in validation study:
1376
Language of validated version:
English
Main article reference
Scior, K., & Furnham, A. (2011). Development and validation of the Intellectual Disability Literacy Scale for assessment of knowledge, beliefs and attitudes to intellectual disability. Research in Developmental Disabilities, 32:1530–1541.
Corresponding author
Katrina Scior
Description
To evaluate knowledge, beliefs, and social distance to intellectual disability in lay people
Year Measure first Published: 2011
About This Measure
Categorical scoring:
No
About the Validation of this Measure
Country where validated:
United Kingdom
Content validity:
A literature search was conducted using the electronic databases PsycINFO and MedLine to identify common lay beliefs about intellectual disability and schizophrenia in a range of cultural contexts. The search terms used included beliefs, attitude, stigma and social distance AND (intellectual disability OR learning disability OR mental retardation OR schizophrenia OR psychosis OR mental illness). On the basis of relevant studies identified, 30 items were generated regarding possible causes and 30 items referring to possible sources of help. These lists were not intended to be exhaustive but rather to tap into a range of belief systems regarding possible causes and interventions.
Reliability notes:
Cronbach’s a for the 22 causal items of the final version was 0.84 for the intellectual disability and 0.87 for the
schizophrenia vignette. The reliability of all causal items was also examined for different ethnic groups and found to be
a >0.81 for the intellectual disability and >0.86 for the schizophrenia vignette. For the 22 final intervention items, Cronbach’s a was 0.84 for intellectual disability and 0.87 for schizophrenia. The reliability of the 22 intervention items was >.80 for all ethnic groups for the intellectual disability and a>0.76 for the schizophrenia vignette. No single item deletion improved the internal reliability by more than 0.03.
