A VISUAL INFERENCE ON THE EFFECT OF SPEED VALUE ON DASH MUSHROOM'S BOOST Mister Wu Passons, Italy ABSTRACT The influence of speed value on the Dash Mushroom's boost in Mario Kart 8 was evaluated through the use of screenshots, revealing that this influence is indeed present. INTRODUCTION It is well known that in Mario Kart Wii the maximum speed that can be obtained during a Dash Mushroom's boost is affected by the maximum speed the combination can reach. Therefore a test of whether this is also true in Mario Kart 8 would be recommended. Here such a test is performed empirically through the use of the Wii U built-in screenshot function. MATERIALS AND METHODS MARIO KART 8 VERSION Mario Kart 8 version 3.0 was used. CONTROLLER USED The Wii U GamePad in normal (with the gyroscope disabled) mode was used. COMBINATION TESTED The following combinations were tested: SPEED VALUE DEPENDENCE: 1.0 combination: Lemmy + Mr. Scooty + Roller Tires + Bowser Kite 2.0 combination: Wendy + Biddybuggy + Standard Tires + Bowser Kite 3.0 combination: Larry + Sports Bike + Slim Tires + Bowser Kite 4.0 combination: Ludwig + Standard Bike + Slim Tires + Bowser Kite 5.0 combination: Roy + Mach 8 + Slim Tires + Bowser Kite 5.75 combination: Morton + Circuit Special + Slick tires + Bowser Kite SAME SPEED COMBINATIONS: Kart combination: Iggy + Standard Kart + Standard Tires + Bowser Kite Bike combination: Iggy + Standard Bike + Standard Tires + Bowser Kite Sports Bike combination: Iggy + Sports Bike + Standard Tires + Bowser Kite ATV combination: Iggy + Standard ATV + Standard Tires + Bowser Kite METHOD Time Trial mode without ghost was used. Mario Kart Stadium was chosen as track. After the beginning of the time trial, the "ZL" button was pushed once in order to use a single mushroom. When the vehicle completely stopped, the "HOME" button was pushed to take a screenshot which was sent through e-mail service. The starting point of the measurement is therefore the starting point of the time trial. RESULTS DEPENDENCE ON SPEED The first evaluation was focused on the dependence on speed value of the mushroom boost. The results are the following: 1.0 combination: 2.0 combination: 3.0 combination: 4.0 combination: 5.0 combination: 5.75 combination: Since a dependence on the speed value of the Dash Mushroom's boost was apparent, several combination having the same speed value (3.75) were tested. The results were: Kart combination: Bike combination: Sports Bike combination: ATV combination: DISCUSSION From the screenshot taken in exam it seems that the speed value affects where the ending point is in this experimental design. Interestingly enough, the use of different combinations suggests that having the same speed value results in the same distance driven. Some differences in the data above can be seen, when watching at the position of the rear wheels, however the use of a different camera angle (see the supplementary materials) indicates that these differences are likely due to the different length of the vehicles and the particular posture the driver is forced to have while driving. Since not only speed value, but also coins affect the maximum speed of the combination, a test was devised to reveal whether coins affect the mushroom boost (see the supplementary materials). The results of this test, although less reliable than these data, support this hypothesis. CONCLUSION The screenshots taken in this study suggest that in Mario kart 8 the Dash Mushroom's boost is indeed affected by the speed value of the combination, and it is likely that this dependence is actually a dependence on maximum speed as determined both by speed value and coins. COMPETING INTERESTS The author declares no competing interests. REFERENCES see for example the thread "speeds of the "Big 3" in km/h" by thondam at GameFAQs (http://www.gamefaqs.com/boards/942008-mario-kart-wii/51159501) ACKNOWLEDGEMENTS The help of MKBoards' users Ade and Dragmirejr in suggesting proper formatting, Ade in suggesting the acquisition of quantitative data, Shito Ryu in obtaining the "mushrooms and coins without sterring in N64 Toad's Turnpike" method and Nefos in inspiring the aforementioned method is acknowledged. CONTACTS If more information or clarifications are needed, or if suggestions or complaints have to be made about this study, the user Mister Wu of MKBoards may be contacted.