Intuitively, it seems that spacing out instances of a given concept or rule would make it ______ to learn the concept/rule. Research conducted by Kornell and Bjork _______ this intuition, revealing that ______ repetitions led to better learning
a) more difficult; supports; massed
b) more difficult; refutes; spaced
c) easier; supports; massed
d) easier; refutes; spaced
Answer: d
Psychology