A zoologist was interested in investigating whether non-human primates (NHPs)
experience attentional “pop-out”; that is, when you are visually searching for something in
a cluttered environment, the object you are looking for can either be difficult to find or is
immediately obvious—it “pops out”. Therefore, they constructed an experiment in which
NHPs were trained to locate an object amongst clutter and he measured how long it took
the NHPs to locate the object. In the baseline condition, the object was presented alone.
The researcher also included 2 additional conditions in which the object was presented
amongst low-levels of clutter or high-levels of clutter. The NHPs completed each condition
in randomized order. If NHPs experience “pop-out”, locating the object should take equally
as long in in the baseline condition as it does in both cluttered conditions. Which analysis
should the zoologist perform?
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