[1] Dalhousie Univ, Dept Psychol & Neurosci, 1355 Oxford St,POB 15000, Halifax, NS B3H 4R2, Canada
[2] Univ Porto, Ctr Psychol, Porto, Portugal
[3] Indiana Univ, Dept Psychol & Brain Sci, Bloomington, IN 47405 USA
[4] Dalhousie Univ, Dept Obstet & Gynaecol, Halifax, NS, Canada