GTRACK: a PC program for computing Goldstein's growth constancy index and an alternative measure of tracking. Academic Article

abstract

• This paper reviews Goldstein's 'growth constancy index,' Xi, a measure of tracking which can be used to determine whether or not individuals maintain their relative positions in the distribution of a given measurement as that distribution changes over time. We suggest that Xi is an appropriate measure of tracking when the (standardized) measurements arise in the context of a Model I ANOVA, but that the intraclass correlation coefficient, rI, may be preferred when a Model II ANOVA is applicable. We also describe--and make available--a PC program which allows the user to choose between Model I and Model II, and computes the appropriate tracking index and confidence intervals for the corresponding parameter.

authors

• Schneiderman, Emet

published proceedings

• Int J Biomed Comput

author list (cited authors)

• Furey, A. M., Kowalski, C. J., Schneiderman, E. D., & Willis, S. M.

citation count

• 4

complete list of authors

• Furey, AM||Kowalski, CJ||Schneiderman, ED||Willis, SM

publication date

• January 1994

publisher

• Elsevier  Publisher

published in

• International journal of bio-medical computing  Journal

keywords

• Algorithms
• Analysis Of Variance
• Animals
• Computer Simulation
• Confidence Intervals
• Growth
• Humans
• Longitudinal Studies
• Macaca Mulatta
• Male
• Mandible
• Microcomputers
• Models, Biological
• Models, Statistical
• Software

Digital Object Identifier (DOI)

• 10.1016/0020-7101(94)90085-x

start page

• 311

end page

• 318

volume

• 36

issue

• 4