Results 241 to 250 of about 462,988 (393)

Edge Sharpness Does Not Vary Between Palaeolithic Flake Technologies, With the Possible Exception of Levallois Débitage

open access: yesArchaeometry, EarlyView.
ABSTRACT Investigating why hominins adopted particular flake technologies during the Mid‐to‐Late Pleistocene is essential to understanding patterns of lithic innovation. This period witnessed the emergence of Levallois technologies (~350–250 ka) and later blades, each “replacing” earlier forms.
Anna Mika, Alastair Key
wiley   +1 more source

Los signos del Nuevo Mundo en Lope de Vega [PDF]

open access: yes, 1994
Penas Ibáñez, Azucena
core  

The relation of spatial skills, spatial memory span, and two anxiety types with statistics anxiety in European and North American University students

open access: yesBritish Journal of Educational Psychology, EarlyView.
Abstract Background & Aims The present two studies investigated the role of spatial cognition in statistics anxiety. The hypothesis that spatial representations and/or visuospatial skills are related to the acquisition of statistics abilities which, when lacking or unused, generate statistics anxiety is examined.
Rose‐Marie Gibeau   +10 more
wiley   +1 more source

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