Artículos de revistas
DOES THE CHRONOTYPE CLASSIFICATION NEED TO BE UPDATED? PRELIMINARY FINDINGS
Fecha
2010Registro en:
CHRONOBIOLOGY INTERNATIONAL, v.27, n.6, p.1329-1334, 2010
0742-0528
10.3109/07420528.2010.490314
Autor
MARTYNHAK, Bruno Jacson
LOUZADA, Fernando Mazzilli
PEDRAZZOLI, Mario
ARAUJO, John Fontenele
Institución
Resumen
Traditionally, chronotype classification is based on the Morningness-Eveningness Questionnaire (MEQ). It is implicit in the classification that intermediate individuals get intermediate scores to most of the MEQ questions. However, a small group of individuals has a different pattern of answers. In some questions, they answer as ""morning-types"" and in some others they answer as ""evening-types,"" resulting in an intermediate total score. ""Evening-type"" and ""Morning-type"" answers were set as A(1) and A(4), respectively. Intermediate answers were set as A(2) and A(3). The following algorithm was applied: Bimodality Index = (Sigma A(1) x Sigma A(4))(2) - (Sigma A(2) x Sigma A(3))(2). Neither-types that had positive bimodality scores were classified as bimodal. If our hypothesis is validated by objective data, an update of chronotype classification will be required. (Author correspondence: brunojm@ymail.com)