Visual scanning of line segments: Object superiority and its reversal

The object superiority and object line effects were investigated with a visual scanning, task. Scanning times for two target lines were ordered as follows from fastest to slowest: no context, unconnected-lines context (flat), object context (three-dimensional), and disorganized context (flat). These results substantiate previous work (Klein, 1978) that demonstrated a reversal of the object superiority effect under speed stress when the unconnected-lines context was compared with the object context. However, these results also demonstrate that this reversal does not generalize to comparisons between disorganized and object contexts.