τ₁₂ (blue point) τ₁₃ (green point) and τ₁₄ (orange point) lags as a function of the mean energy of the respective channel. Each plot represents an example of GRB which show one characteristic trend of the time lag versus energy. From left to right: transition from positive values of τ₁₂ and τ₁₃ to negative τ₁₄ values, increasing time lag with energy and an example of a more hybrid, scattered trend.