Answer:
Mark is participating in one of Posner's attention experiments. As he looks at the fixation point, an arrow pointing to the right appears. Then the stimulus appears in the left target area. The cue in this trial would be considered "Both symbolic and invalid"
Explanation:
Posner' s attention test is a psychological test which is being conducted in order to check the attention and attention deficit of the person. The spatial orientation happens when the attention of the person is drawn towards a specific location, the attention is drawn because of the stimulus generation. Drawing attention is known as the cueing. The theory of attention is generally made on the basis of the target detection, visual orientation and also on alertness. sometimes it is believed that auditory stimulus is also included in it.
