“…These questionnaires included, in order, a questionnaire on caffeine consumption, the short version of a questionnaire investigating achievement motivation (Leistungsmotivationsinventar-kurz; Schuler & Prochaska, 2001), and German versions of the following tests: Fagerström Test for Nicotine Dependence (Bleich, Havemann-Reinecke, & Kornhuber, 2002), the Epworth Sleepiness Scale (Bloch, Schoch, Zhang, & Russi, 1999), the Karolinska Sleepiness Scale (Åkerstedt & Gillberg, 1990), the Prospective and Retrospective Memory Questionnaire (Crawford, Henry, Ward, & Blake, 2006; German translation by Kaschel, 2002), the HADS-D (Herrmann et al, 1995), the BDI-II (Hautzinger et al, 2006), the STAI (Laux et al, 1981) and a translation of the passionate love scale (Hatfield & Sprecher, 1986). For the present study, we will report the results of the BDI-II, HADS-D and STAI only.…”