jnl:hobart2009
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jnl:hobart2009 [2021/03/12 13:05] admin created |
jnl:hobart2009 [2021/03/18 07:26] (current) admin added chapter 2 |
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| ===== Improving the evaluation of therapeutic interventions in multiple sclerosis: The role of new psychometric methods. ===== | ===== Improving the evaluation of therapeutic interventions in multiple sclerosis: The role of new psychometric methods. ===== | ||
| - | ==== New psychometric methods | + | ==== Chapter 1 ==== |
| + | === New psychometric methods === | ||
| Rasch measurement vs Item response theory | Rasch measurement vs Item response theory | ||
| - | ==== Traditional psychometric methods | + | === Traditional psychometric methods |
| - psychometric -- originally psychology but now broadened | - psychometric -- originally psychology but now broadened | ||
| - psychometric: | - psychometric: | ||
| | | ||
| - | === Rating scales | + | === Rating scales === |
| - for properties that we can't measure directly e.g. happiness, disability (vs weight) | - for properties that we can't measure directly e.g. happiness, disability (vs weight) | ||
| - | - latent traits -- " | + | - latent traits -- " |
| - Dichotomous (RMI) vs polytomous (3 or more) | - Dichotomous (RMI) vs polytomous (3 or more) | ||
| - Direct also opposite RMI vs MSIS-29 | - Direct also opposite RMI vs MSIS-29 | ||
| Line 25: | Line 26: | ||
| * Data quality | * Data quality | ||
| * scaling (assumptions) | * scaling (assumptions) | ||
| - | * targetting | + | * targeting |
| * reliability | * reliability | ||
| * validity | * validity | ||
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| - scaling | - scaling | ||
| - | === Source === | + | ====Chapter 2 New Psychometric Methods |
| + | |||
| + | ===Overview=== | ||
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| + | - Traditionally use Likert summated ratings --> cannot verify data | ||
| + | - New: theories can be formally and rigorously tested | ||
| + | - IRT & Rasch: different origins, perspectives and proponents | ||
| + | - weak theory --> weak conclusions -- we need strong theory (IRT and Rasch) | ||
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| + | - Mathematical relations between variables and events enables __checking, prediction, analysis__ (refine model, review data) | ||
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| + | New methods also concern the relationship between the TRUE and OBSERVABLE score, BUT also | ||
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| + | " | ||
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| + | - IRT: Louis Thurstone UC, Frederick Lord - Educational Testing Service | ||
| + | - Georg Rasch, Copenhagen - Poisson; each Student as an individual | ||
| + | - Stability: __item locations__ and __person locations__ could be estimated independently of each other | ||
| + | - Mathematical model given primacy == ' | ||
| + | - {if data doesn' | ||
| + | |||
| + | ===Why Rasch is better than IRT=== | ||
| + | |||
| + | ==== Source | ||
| Hobart, J., & Cano, S. (2009). Improving the evaluation of therapeutic interventions in multiple sclerosis: The role of new psychometric methods. Health Technology Assessment, 13(12). https:// | Hobart, J., & Cano, S. (2009). Improving the evaluation of therapeutic interventions in multiple sclerosis: The role of new psychometric methods. Health Technology Assessment, 13(12). https:// | ||
| - | === Meta === | + | ==== Meta ==== |
| - | - created: 2021-03-11 | + | - created: 2021-03-11 |
| + | - 2021-03-18 added chapter 2 | ||
jnl/hobart2009.1615554348.txt.gz · Last modified: 2021/03/12 13:05 by admin
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