Gamma movement and time error

Three experiments explored the possibility that gamma movement affects the time error in the successive comparison of the lengths of two briefly presented lines. The first experiment discovered that gamma movement was greatly reduced in peripheral vision. The second indicated that time errors had two components, one attributable to gamma movement and one to the absolute-impression bias. In agreement with the finding that gamma movement was reduced peripherally, the third experiment showed that for peripheral lines the time-error component attributable to gamma movement vanished while that attributable to the absolute-impression bias persisted. Thus, it seems likely that gamma movement affects time errors.