On the structure of motor symptoms of Parkinson's disease

Accuracy of clinical diagnosis of idiopathic Parkinson's disease: a clinico-pathological study of 100 cases.

1992 • 9,892 citations

Principal Components Analysis

1989 • 2,623 citations

Unified Parkinson's disease rating scale characteristics and structure

1994 • 747 citations

Maximum Likelihood Estimation: Logic and Practice.

1994 • 268 citations

Maximum Likelihood Estimation

1993 • 214 citations

Factor structure of the unified Parkinson's disease rating scale: Motor examination section

1998 • 200 citations

Alpha Coefficients for Stratified-Parallel Tests

1965 • 155 citations

The natural history of parkinson's disease

1998 • 117 citations

Factor analysis of the motor section of the unified Parkinson's disease rating scale during the off-state

1999 • 82 citations

Scales for rating motor impairment in Parkinson's disease: studies of reliability and convergent validity.

1991 • 72 citations

Application of the unified Parkinson's disease rating scale in progressive supranuclear palsy: Factor analysis of the motor scale

2000 • 61 citations

Robust Principal Component Analysis with Adaptive Selection for Tuning Parameters

2004 • 39 citations

Psychometric properties of the Unified Parkinson?s Disease Rating Scale and of the Short Parkinson?s Evaluation Scale

2003 • 37 citations

Factor Analysis of Parkinson's Impairment

1987 • 22 citations

Motor function in Parkinson's disease and supranuclear palsy: simultaneous factor analysis of a clinical scale in several populations

2006 • 22 citations

Deleted Work

1955 • 0 citations