Paleodemographic age-at-death distributions of two Mexican skeletal collections: A comparison of transition analysis and traditional aging methods

2013 ◽  
Vol 152 (1) ◽  
pp. 67-78 ◽  
Author(s):  
Meggan Bullock ◽  
Lourdes Márquez ◽  
Patricia Hernández ◽  
Fernando Ruíz
Keyword(s):  
Age At Death ◽  
Transition Analysis ◽  
Skeletal Collections

Paleodemographic Simulations at Xcambó, Yucatan: Early and Late Classic Population Dynamics in the Northern Maya Territories

2020 ◽  
Vol 31 (4) ◽  
pp. 683-701
Author(s):  
Allan Ortega-Muñoz ◽  
Vera Tiesler ◽  
Thelma Sierra-Sosa ◽  
Andrea Cucina
Keyword(s):  
Population Dynamics ◽  
Growth Rates ◽  
Environmental Changes ◽  
Mortality Rates ◽  
Age At Death ◽  
Late Classic ◽  
Skeletal Collections

Paleodemographic simulations are rare in the Maya region, because generally the skeletal collections do not represent well the ancient living population, are poorly preserved, and lead to flawed age-at-death estimations. The skeletal collection of Xcambó, however, is suitable for paleodemographic analysis and is large enough to enable comparison of paleodemographic trends between the Early (AD 250–550) and Late Classic (AD 550–750) periods. Three demographic simulations were generated; two relied on growth rates calculated from the site's previous archaeodemographic data, and a third simulation was based on a stationary scenario by applying Weiss's (1973) and Séguy and Buchet's (2013) models. All simulations indicate that Xcambó’s Late Classic population was growing faster than its Early Classic peers, with higher rates of survivorship and more severe mortality rates. We argue that the differences are more likely due to shifts in lifestyle and wealth than to environmental changes, as is confirmed by other bioarchaeological and skeletal indicators.

The Solution Strategy as an Indicator of the Developmental Stage of Preschool Children’s Mental-Rotation Ability

2010 ◽  
Vol 31 (2) ◽  
pp. 95-100 ◽  
Author(s):  
Claudia Quaiser-Pohl ◽  
Anna M. Rohe ◽  
Tobias Amberger
Keyword(s):  
Preschool Children ◽  
Mental Rotation ◽  
Latent Class ◽  
Preschool Age ◽  
Stage Model ◽  
Solution Strategy ◽  
Thinking Aloud ◽  
Transition Analysis ◽  
Solution Strategies ◽  
Close Relationship

The solution strategies of preschool children solving mental-rotation tasks were analyzed in two studies. In the first study n = 111 preschool children had to demonstrate their solution strategy in the Picture Rotation Test (PRT) items by thinking aloud; seven different strategies were identified. In the second study these strategies were confirmed by latent class analysis (LCA) with the PRT data of n = 565 preschool children. In addition, a close relationship was found between the solution strategy and children’s age. Results point to a stage model for the development of mental-rotation ability as measured by the PRT, going from inappropriate strategies like guessing or comparing details, to semiappropriate approaches like choosing the stimulus with the smallest angle discrepancy, to a holistic or analytic strategy. A latent transition analysis (LTA) revealed that the ability to mentally rotate objects can be influenced by training in the preschool age.

Changes to the work–family interface during the COVID-19 pandemic: Examining predictors and implications using latent transition analysis.

2020 ◽  
Vol 105 (10) ◽  
pp. 1073-1087 ◽  
Author(s):  
Hoda Vaziri ◽  
Wendy J. Casper ◽  
Julie Holliday Wayne ◽  
Russell A. Matthews
Keyword(s):  
Latent Transition Analysis ◽  
Transition Analysis ◽  
Latent Transition ◽  
Work Family
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