How representative are neuroimaging samples? Large-scale evidence for trait anxiety differences between fMRI and behaviour-only research participants di Charpentier, CJ, Faulkner, P, Pool, ER, Ly, V, Tollenaar, MS, Kluen, LM, Fransen, A, Yamamori, Y, Lally, N, Mkrtchian, A, Valton, V, Huys, QJM, Sarigiannidis, I, Morrow, KA, Krenz, V, Kalbe, F, Cremer, A, Zerbes, G, Kausche, FM, Wanke, N, Giarrizzo, A, Pulcu, E, Murphy, S, Kaltenboeck, A, Browning, M, Paul, LK, Cools, R, Roelofs, K, Pessoa, L, Harmer, CJ, Chase, HW, Grillon, C, Schwabe, L, Roiser, JP, Robinson, OJ, O'Doherty, JP