The Four Square Step Test is a Feasible and Valid Clinical Test of Dynamic Standing Balance for Use in Ambulant People Poststroke

Statistical power analysis for the behavioral sciences

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Statistical Power Analysis for the Behavioral Sciences (2nd ed.).

Peter A. Lachenbruch, Jacob Cohen · Journal of the American Statistical Association · 1989 · 37.6K citations

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A clinical test of stepping and change of direction to identify multiple falling older adults

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Fall events among people with stroke living in the community: Circumstances of falls and characteristics of fallers

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Medicine, Community Health, Rehabilitation Medicine +14

A New Test of Dynamic Standing Balance for Stroke Patients: Reliability, Validity and Comparison with Healthy Elderly

Keith Hill · Physiotherapy Canada · 1996 · 419 citations

Medicine, Physical Medicine, Rehabilitation Medicine +16