“…Nevertheless, it should be noticed here that, although the majority of studies examining cognitive after-effects in healthy subjects have used 15 • leftward optical deviations e.g., [6][7][8][9], at least two studies have shown after-effects on the landmark task following adaptation to only a 10 • leftward optical deviation [14,20]. It is likely that the experimental conditions (e.g., different line locations presented on a computer screen [20]) or alternate data analyses (e.g., considering only the percentage of 'left responses' without determining the subjective center of the line [14]) led to a more sensitive method for expressing the perceptual bias in the landmark task. Concerning manual bisection, it is worth noting that the slow movement executions may exclude open-loop control processes which were mainly assessed in the sensorimotor open-loop pointing [7].…”