Fig. 4
From: Eyes on hold: motion task difficulty jointly delays microsaccade and pupil responses
Performance on the motion direction discrimination task. (a) Discriminability (measured by d′) was significantly greater and (b) mean response times were lower for cardinal than oblique directions and (c-d) for large than small tilt offsets. Opaque dots represent the sample means; translucent dots represent each observer. Error bars reflect the standard error of the difference.
