Brain size area in women, corresponding to spatial versus language specializations. Small studies have attempted to link brain volume with functional measures such as P300 auditory evoked potentials but finding no association. Studies attempting to related sibling differences in IQ to differences in brain volume are hampered by relatively small sample sizes and the noisy nature of such difference scores, yielding weak evidence for cross-trait cross-sib correlations. The largest brain is that of the sperm whale, weighing about , and killer whales, weighing about . An elephant's brain weighs just over and a bottlenose dolphin's . Brain size tends to vary according
Brain Exercise with Dr. Kawashima where every game will be played while monitoring its effect on the brain of the player. Brain Exercise with Dr. Kawashima The game is structured around a set of 15 minigames which are used in the different game modes. After selecting a profile (there are 3 slots for different users) a cel-shaded 3D Dr. Kawashima will accompany the player when browsing the menus and will explain the minigames. After playing each minigame in any of the game modes, player's performance is rated via a ranking of items found in nature, which includes creatures such as plankton, a whale or a