Fig. 5From: Visual completion from 2D cross-sections: Implications for visual theory and STEM education and practice a The mean dip estimates (dark gray) for each picture along with the correct dip angle for each picture (light gray) in Experiment 1. Note that dip angle is defined relative to the plane of the picture. A report of a region as continuing “straight back” would be a dip estimate of 90°. b Frequency distribution of responses that fell within 10° angle bins in Experiment 1Back to article page