Additional Comment I forgot:
Dear ALOphysio:
I have given you reply some thought.
I would disagree with the idea that the inter-person results being similar is proof that the test is reliable. How so?
Hungerford may have found that all people conditioned to believe that the test is accurate got similar results. Pavlov did that with dogs when a bell rung at feeding times.
Science is not about being sweetie pie to everyone when they dish out gall.
Science is about what is accurate and what is not.
If we took a bus load of people into the outback in Australia who had never been out of the city, what would they "see" as they drove down the highway on a hot summer ( December to March) day? Would it not appear to all of them and would not all be in agreement that the road appears to have a layer of water on the road when in fact is is the refraction of light???????
So having every one agree that they saw the same thing does not make it so!!!
In the standingSIJ or stork test every one "sees" that the PSIS moves with the sacrum in hip flexion or torso flexion as a positive for joint problems. What does that prove??? Is it really a joint problem or not???
In the same landmarking with hip ABD the PSIS moves superior and lateral to the sacrum. What does that prove???
What is really the fact in this case? Is the joint stuck in one test and clear in the other or is there a false positive going on and we are ignoring the facts???
I humbly suggest that you try the two test back to back and decide for yourself and others do the same..
Try the standard test of the SIJ with hip flexion and torso flexion and then landmark the PSIS to sacrum with hip ABD. For every stuck joint, the PSIS moves superior and lateral in the second test. Period.
WHat does this suggest???
My best to you,
Neuromuscular.