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Visual-working-memory (VWM) is crucial for complex cognitive tasks, such as learning and reasoning. Previous studies suggest that VWM stores integrated object, rather than independent features (Luck & Vogel, 1997). Memory accuracy is the same whether the participant needs to maintain one or all features from the same object. Several recent studies, however, have challenged this theory by demonstrating that features from the same object can be stored independently in VWM (Fougnie & Alvarez, 2011). Using change detection task (CDT), six experiments were conducted to resolve this controversy. Experiments 1-3 allocated two colors to either two or six to-be-remembered objects, whose identity was defined by color and shape (and/or location). The object-based theory predicts worse CDT performance when the number of to-be-remember objects was six. Experiments 1-3, however, consistently showed that …