Compare methods

	CHIEF Environmental Barriers	Environmental Barriers Measurement
Field	Disability Studies	Disability Studies
Family	Latent structure	Process / pipeline
Year of origin	2004	2001
Originator	Gale G. Whiteneck and colleagues (Craig Hospital)	World Health Organization (ICF environmental factors); methodology elaborated by Whiteneck and colleagues
Type	Self-report instrument quantifying environmental barriers by frequency and magnitude	General methodological strategy for measuring ICF environmental factors as barriers and facilitators
Seminal source	Whiteneck, G. G., Harrison-Felix, C. L., Mellick, D. C., Brooks, C. A., Charlifue, S. B., & Gerhart, K. A. (2004). Quantifying environmental factors: a measure of physical, attitudinal, service, productivity, and policy barriers. Archives of Physical Medicine and Rehabilitation, 85(8), 1324-1335.	World Health Organization. (2001). International Classification of Functioning, Disability and Health: ICF. Geneva: WHO. ISBN: 9789241545426
Aliases	CHIEF, Craig Hospital Environmental Inventory, Frequency-Magnitude Barrier Scale, Environmental Factors Inventory	ICF Environmental Factors Assessment, Barrier-Facilitator Measurement, Environmental Factors Measurement Strategy, Participation Environment Assessment
Related	3	3
Summary	The Craig Hospital Inventory of Environmental Factors, known as CHIEF, is a self-report instrument that quantifies the environmental barriers people with disabilities encounter in daily life. Developed by Whiteneck and colleagues in 2004, it operationalizes the environmental-factors component of the WHO ICF, which holds that disability arises from the interaction between a person and their surroundings rather than from impairment alone. CHIEF asks respondents about barriers across five domains — physical and structural, attitudinal and support, services and assistance, productivity, and policy — and for each potential barrier it captures two things: how often the barrier is encountered (frequency) and how big a problem it is when encountered (magnitude). The defining feature of the instrument is that these two ratings are multiplied into a frequency-by-magnitude product, so that a barrier counts for more if it is both common and serious. These products are averaged into domain scores and an overall score, giving a quantitative profile of the environmental obstacles a person faces.	Environmental barriers measurement is the general methodological strategy for assessing the environmental-factors component of the WHO ICF, which conceives disability as the product of an interaction between a person and the world they inhabit. Rather than a single questionnaire, it is an approach: enumerate the relevant environmental domains defined by the ICF — products and technology, the natural and built environment, support and relationships, attitudes, and services, systems, and policies — and then characterize each factor by its valence (whether it acts as a barrier or a facilitator) and its extent. Because the ICF treats the environment as something that can either hinder or help, the strategy deliberately measures both negative and positive influences rather than only obstacles. The assessed factors are then linked statistically to participation outcomes, and the deeper aim is to model the interaction between a person's capacity and their environment, so that the disabling or enabling role of context can be estimated. Specific instruments such as the Craig Hospital Inventory of Environmental Factors are particular realizations of this broader strategy.