Effects of Angles of Orientation, Mental Distance and Crowding on Mental Rotation Faculty

The study investigated the effects of angles of orientation, mental distance and crowding on mental rotation rate. Seventy two undergraduates from the University of Nigeria with mean age of 23.59 participated in the study. under a 3x2x3 mixed nested design, they memorized an image medium containing any of the nine upper-case old-bookman style alphabets (A, B, L, R, K, P, F, T, E) and later decided whether the alphabets rotated into 3 different angles of orientation (0, 30, 90), within 2 crowding conditions (Crowding or no crowding) and 3 levels of mental distance (0cm, 6cm, 12cm) were the same with those earlier memorized.