Measurement characteristics of client assessment
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Measurement Characteristics of Client Assessment. HPR 451 Chapter 2. Measurement???. Error and confidence are at the heart of assessment They underlie the concepts of Validity Reliability Fairness Usability All measurements have error. Object is to reduce the error…. Error.

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Measurement Characteristics of Client Assessment

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Measurement characteristics of client assessment

Measurement Characteristics of Client Assessment

HPR 451

Chapter 2


Measurement

Measurement???

  • Error and confidence are at the heart of assessment

  • They underlie the concepts of

    • Validity

    • Reliability

    • Fairness

    • Usability

  • All measurements have error. Object is to reduce the error….


Error

Error

  • Scores should change roughly the same amount as the client’s attitude or skill. If not, there is variance caused by unintentional or random error.

  • Lots of things can cause variance – any condition irrelevant to the purpose of the assessment

  • CTRS should make every effort to reduce error to obtain true score – Be confident in tool and follow protocol


Measurement terminology

Measurement Terminology

  • Assessment instruments are measurement tools

    • Measures attitudes, skills, abilities, knowledge, interests

  • Norm-referenced - Compared with scores in a group

  • Criterion-referenced–Compared with preset standard

  • Validity – The extent to which it meets its intended purpose

    • Content validity – How well does it measure subject matter? (i.e. Knowledge of leisure resources)

    • Criterion-related validity – the extent to which test performance relates to another valued measure of performance (i.e. ACT, SAT)


Measurement terminology cont d

Measurement Terminology cont’d

  • Construct validity – measuring unobservable traits (i.e. self-esteem, anxiety, locus of control, depression, extroversion, intelligence)

    • Most TR assessments measure behaviors and not constructs

  • Reliability – Estimate of the consistency of measurement

    • Stability - How stable is the instrument over time?

    • Equivalency - How closely related are two or more forms of the same assessment?

    • Internal consistency - How closely are items on the assessment related?


  • Practicality and usability

    Practicality and Usability

    • Practicality –

      • Is it doable? (time, expertise, cost)

      • Does it serve the purpose for which it was intended better than other assessments?


    Determine the purpose

    Determine the Purpose

    • Client info (baseline, formative, summative)

    • Research

    • Communication

    • Administrative

      Define the Domain

    • Leisure Ability Model – Functional Intervention, Leisure Education, Recreation Participation – See Social Skills General Outcome example on pg 60


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