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Frequently Asked Questions

Q: Can the AHA be used with children with bilateral CP?
A: The validity of the AHA is established for children with unilateral disabilities like hemiplegic CP and obstetric brachial plexus palsy. The item difficulty hierarchy will most probably be different for children with a bilateral involvement, even if they have a side difference and the items might not fit other diagnostic groups. This means that the scale validity cannot be assured for children with diagnoses other than hemiplegic CP and OBPP.

Q: I meet many children with unilateral Upper Limb Reduction Deficiencies. Can AHA be used with this diagnostic group?
A: A group of researchers in Holland made a literature review looking for tests and questionnaires evaluating hand functioning useful for children with upper limb reduction deficiencies (ULRD). Out of 14 reviewed tests they found two to be relevant for this group of children. One was AHA.
    Buffart LM, Roebroeck ME, Pesch-Batenburg J, Janssen HJ, Stam HJ (2006) Assessment of arm/hand functioning in children with a congenital transverse or longitudinal reduction deficiency of the upper limb. Disability and Rehabilitation, 28:85-95.
    However, we feel the AHA needs to be evaluated carefully concerning item fit for this group of children before being recommended. A study on this topic is ongoing. Contact OT PhD Liselott Hermansson (Liselotte.Hermansson@orebroll.se) or OT PhD Lena Krumlinde-Sundholm (Lena.Krumlinde.Sundholm@ki.se) if you have questions about this.

Q: Where can I find easy to read information about the Rasch measurement model?
A: A good book to start with, where the Rasch measurement model is well and comprehensibly described is:
    Bond TG, Fox CM. (2007) Applying the Rasch model. Fundamental measurement in the human sciences. Mahawa: Lawrence Erlbaum Associates Publishers.