“…In the following years, it gained profile also in the United States in the form of the experience sampling method (ESM: Csikszentmihalyi & Larson, 1987;Hektner & Csikszentmihalyi, 2002) for assessing changes in mood state in representative samples of situations. Until recently (Barrett & Barrett, 2001), most ESM research in the United States was still employing a paper-pencil (booklet) format, while re search in Europe since the 1980s has focused on the develop ment of more advanced computer-assisted methods for infield research on personality or, for example, on stress and coping (Perrez & Reicherts, 1989Perrez, Schoebi, & Wilhelm, 2000;Wilhelm, 2004;Wilhelm & Perrez, 2001;Thiele, Laireiter & Baumann, 2002), some of which was syn chronized with physiological measures (see Fahrenberg & Myrtek, 1996, 2001a,b, 2005 or conducted interactively (Myrtek, 2004;Myrtek, Brügner, Fichtler, König, Müller, Foerster, & Höppner, 1988;Myrtek, Foerster, & Brügner, 2001). …”