The experiment tested the preferences of sowbugs (woodlice) between dark vs light environments and moist vs dry environments. For dark vs light, more sowbugs moved to the side covered with cardboard (dark) than the side under a lamp (light). For moist vs dry, more sowbugs were found on the side with wet filter paper than the dry side. The experiment supported the hypothesis that sowbugs prefer dark and moist environments, consistent with their natural habitat preferences.