Evaluating assessment reliability
O2144
,Content
• Quick recap
• Measurement in assessment
• Error, reliability and validity
• Reliability in more detail
• Methods for establishing reliability
• What to look for when considering the reliability of an assessment
, What is
measurement?
Measuring is undertaken by therapists to ascer
the dimensions (size), quantity (amount) or cap
of a trait, attribute or characteristic of a perso
is required by the therapist to develop an accu
picture of the person’s needs and problems to
baseline for therapeutic intervention and/or to
provide a measure of outcome. A measureme
obtained by applying a standard scale to variab
translating direct observations or patient/prox
reports to a numerical scoring system.
Laver-Fawcett (2007) Principles of assessment
outcome measurement Occupational Therapis
Physiotherapists. p.132.
This Photo by Unkn
, Measurement = trues score + error
Good assessments/test are design to have as little error as possible
As …error
reliability decreases
and validity
increase…
O2144
,Content
• Quick recap
• Measurement in assessment
• Error, reliability and validity
• Reliability in more detail
• Methods for establishing reliability
• What to look for when considering the reliability of an assessment
, What is
measurement?
Measuring is undertaken by therapists to ascer
the dimensions (size), quantity (amount) or cap
of a trait, attribute or characteristic of a perso
is required by the therapist to develop an accu
picture of the person’s needs and problems to
baseline for therapeutic intervention and/or to
provide a measure of outcome. A measureme
obtained by applying a standard scale to variab
translating direct observations or patient/prox
reports to a numerical scoring system.
Laver-Fawcett (2007) Principles of assessment
outcome measurement Occupational Therapis
Physiotherapists. p.132.
This Photo by Unkn
, Measurement = trues score + error
Good assessments/test are design to have as little error as possible
As …error
reliability decreases
and validity
increase…
