“…This was possible because of the use of the ESM procedure. Previous studies have demonstrated the validity of ESM in psychiatric populations (Barge-Schaapveld, Nicolson, van der Hoop & De Vries, 1995;Delespaul, 1995;Dijkman-Caes, De Vries, Kraan & Volovics, 1993;Kimhy et al, 2009Kimhy et al, , 2006Myin-Germeys et al, 2009Myin-Germeys, van Os, Schwartz, Stone & Delespaul, 2001;Peeters, Berkhof, Delespaul, Rottenberg & Nicolson, 2006; van Os, Linscott, Myin-Germeys, Delespaul & Krabbendam, 2009). …”