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G Baron

Publications and source records attributed to G Baron.

70 records · Page 4Linked to original sources
PubMedDate not supplied

A comparative study of the fit of four different functions to longitudinal data of growth in height of Belgian girls.

We have fitted Preece-Baines model 1, double logistic, logistic and Gompertz functions to longitudinal data on the growth in height of 35 Belgian girls, followed from birth to 18.0 years. The Preece-Baines model 1 showed significantly lower residual mean squares than the double logistic function, when fitted to data beyond the age of 1.0 year. The former model was also most robust towards variations in the lower age bound by the subject's data series and always described the adolescent spurt better than the latter. Both models fitted the data badly when measurements before the age of 1.0 year were included, and they usually estimated the point at take-off too early. Over the adolescent cycle, only, the logistic function fitted our data slightly better than the Gompertz function, with significantly lower pooled residual mean squares, though a slightly worse performance in the runs-test.

Adolescent↗
PubMedDate not supplied

Brain and body growth and allometry in the Mongolian gerbil (Meriones unguiculatus).

A new four-parameter version of Pütter's curve (Pütter, 1920), recently developed by Jolicoeur and Pirlot (1988), is applied to cross-sectional data on brain and body growth in 127 male and 136 female Mongolian gerbils (Meriones unguiculatus) ranging from birth up to approximately 2 years in postnatal age. The physical development of the gerbil is more rapid than that of the white rat and of the domestic rabbit even though its behavioral development is known to be somewhat slower. Like other recent studies on rats, rabbits and humans, the present analysis indicates that complex allometry (curvature of log-log relationships) is more widespread in the quantitative development of mammals than generally realized.

Age Factors↗