Design Memory Experiment

My experiment is on STM. I am using digit span and corsi blocks.The three conditions are no concurrent task articulatory suppression and concurrent tapping. My question is is this a 2x3 mixed design?My DV is the number of items in the longest sequences that the P is able to reproduce correctly. My IV is the type of task digit or corsi. I am confused about second IV. Can U help. I persume I use a mixed design ANOVA??