On a Comprehensive Test for the Homogeneity of Variances and Covariances in Multivariate Problems

Biometrika ◽  
1939 ◽  
Vol 31 (1/2) ◽  
pp. 31 ◽  
Author(s):  
D. J. Bishop
Keyword(s):  
Homogeneity Of Variances ◽  
Multivariate Problems ◽  
Comprehensive Test

scholarly journals Eucalypt Clonal Hybrid Influences the Carbon Amount of Below-Ground Biomass in Oxisol, Brazil

2020 ◽  
Vol 3 (1) ◽  
pp. 53
Author(s):  
Grasiele Dick ◽  
Humberto J. Eufrade-Junior ◽  
Mauro V. Schumacher ◽  
Gileno B. Azevedo ◽  
Saulo P. S. Guerra
Keyword(s):  
Carbon Concentration ◽  
Eucalyptus Grandis ◽  
Eucalyptus Camaldulensis ◽  
Eucalyptus Urophylla ◽  
Ground Biomass ◽  
Homogeneity Of Variances ◽  
Below Ground ◽  
Hybrid Eucalyptus ◽  
Carbon Determination ◽  
Hybrid Clones

The objective of this study was to evaluate whether there is an influence of different clonal hybrids of Eucalyptus urophylla on the carbon concentration and amount in below-ground biomass in trees cultivated in Oxisol, Brazil. Stumps and roots of three different eucalypt hybrid clones, AEC 0144, AEC 0223, and VM01, were selected, weighed immediately after being removed from the ground, and sampled for carbon determination and moisture content at the laboratory. The Shapiro-Wilk and Bartlett tests were used to evaluate data distribution and the homogeneity of variances, respectively. Analysis of variance (ANOVA) complemented by the Scott-Knott test was used to evaluate the effects of specie/hybrid on the below-ground biomass (dry matter) and carbon amount per stump. The hybrid type of Eucalyptus urophylla does not influence the carbon concentration; however, there is a difference in below-ground biomass production and carbon amount with it being higher for Eucalyptus urophylla × Eucalyptus camaldulensis when compared to the species Eucalyptus urophylla and hybrid Eucalyptus urophylla × Eucalyptus grandis.

scholarly journals Children Involved in Team Sports Show Superior Executive Function Compared to Their Peers Involved in Self-Paced Sports

Children ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 264
Author(s):  
Silke De Waelle ◽  
Felien Laureys ◽  
Matthieu Lenoir ◽  
Simon J. Bennett ◽  
Frederik J.A. Deconinck
Keyword(s):  
Physical Activity ◽  
Executive Function ◽  
Executive Functioning ◽  
Team Sports ◽  
Developmental Period ◽  
Organized Sports ◽  
Physical Activity Interventions ◽  
Childhood Physical Activity ◽  
Comprehensive Test ◽  
Sports And Physical Activity

Children’s motor and cognitive functions develop rapidly during childhood. Physical activity and executive function are intricately linked during this important developmental period, with physical activity interventions consistently proving to benefit children’s executive function. However, it is less clear which type of physical activity shows the strongest associations with executive function in children. Therefore, this study compared executive function performance of children aged 8 to 12 that either participated in team sports or self-paced sports or were not involved in any kind of organized sports (non-athletes). Results demonstrate that children participating in team sports show superior executive function compared to children participating in self-paced sports and non-athletes. Importantly, children participating in self-paced sports do not outperform non-athletes when it comes to executive function. This study is the first to show that even at a very young age, team sports athletes outperform athletes from self-paced sports as well as non-athletes on a multifaceted and comprehensive test battery for executive function. Furthermore, our findings support the hypothesis that cognitively engaging physical activity, such as participation in team sports, might show stronger associations with executive functioning compared to other types of sports and physical activity.

The Validity of the Comprehensive Test of Nonverbal Intelligence As a Measure of Fluid Intelligence

Assessment ◽  
2001 ◽  
Vol 8 (1) ◽  
pp. 95-103 ◽  
Author(s):  
Kerry S. Lassiter ◽  
Thomas K. Harrison ◽  
T. Darin Matthews ◽  
Nancy L. Bell
Keyword(s):  
Fluid Intelligence ◽  
Nonverbal Intelligence ◽  
Comprehensive Test

Personality of children with accident‐related injuries

2003 ◽  
Vol 17 (4) ◽  
pp. 299-307 ◽  
Author(s):  
Margarete Vollrath ◽  
Markus A. Landolt ◽  
Karin Ribi
Keyword(s):  
Personality Traits ◽  
School Children ◽  
Factor Model ◽  
Five Factor Model ◽  
Economic Status ◽  
Personality Inventory ◽  
Emotional Instability ◽  
Socio Economic Status ◽  
Personality Inventory For Children ◽  
Comprehensive Test

Previous studies based on a variety of behaviour, temperament, and personality measures identified a pattern of over‐activity, impulsiveness, emotional instability, and aggressiveness in children who are prone to accidents. The present study is the first to study accident‐prone children by means of a comprehensive test for the assessment of the Five Factor model (Hierarchical Personality Inventory for Children (HiPIC) (Mervielde & De Fruyt, 1999). 118 children, aged 6–15 years, who were hospitalized due to an accident‐related injury, were contrasted with 184 school‐children of the same age. Lower socio‐economic status was under‐represented in both groups. Children who were exposed to accidents had higher scores on the facets of energy, optimism, and non‐shyness (Extraversion domain), and lower scores on the facets of concentration and achievement striving (Conscientiousness domain). There was no indication of higher aggressiveness, impulsiveness, or emotional instability in the group exposed to accidents, and there were no gender‐by‐accident interactions. Results suggest that there is a relatively benign pattern of personality traits that is related to greater accident hazard in children. Copyright © 2003 John Wiley & Sons, Ltd.

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