Fig. 2: Results of the simple RT task in the SID-Photo and SID-Video study.

a RT was significantly slower in the SID-Photo study than in the SID-Video study (main effect of study) and b young adults responded significantly faster than older adults (main effect of age). Statistical comparisons were made using a 2 × 2 design (study x age) permutation F-test. Data is presented in boxplots overlaid with data points. Boxes span from the lower to the upper quantile and whiskers of the boxplots depict data points that are the furthest from the center while still being inside the range of 1.5 times the interquartile range from the lower or upper quartile. Solid lines indicate the median, dashed lines indicate the mean. Asterisks mark significant differences (p < 0.001).