Answer:
b. We can attend to two different locations without a reduction in performance.
Step-by-step explanation:
Posner, Snyder, and Davidson examined spatial attention using arrows as a prime 1980 but the statement "We can attend to two different locations without a reduction in performance" was not supported by their findings.
The Posner paradigm which was formulated by Micheal Posner is a kind of task that is done to gauge person's capability to perform an attentional shift or studying individual visual attention.
The most significant aspect of cue paradigm is that it can be valid or invalid.