Additional validity evidence for the composite scale of morningness

The aim of the present work was to validate an Italian version of the compo site scale (CS) of morningness (Smith, Reilly & Midkiff, 1989: Smith, C.S., Reilly, C., & Midkiff, K. (1989). Evaluation of three circadian rhythm que stionnaires with suggestions for an improved measure of morningness. Journa l of Applied Psychology, 74(5), 728-738) by means of psychological and phys iological variables. A sample of 89 Ss was administered the CS. Body temper ature, subjective alertness and subjective mood readings were collected at & a.m., 2 p.m. and 11 p.m. On the whole results indicate a good validity of CS. With regard to the criterion converting CS scores into a type, new sta ndard cut-off scores are discussed in the present study. (C) 2000 Elsevier Science Ltd. All rights reserved.