Answer:
Last;First.
Step-by-step explanation:
In an experiment on visual short-term memory by Wright A. A in 2015, the subjects were pigeons, rhesus monkeys and humans. A sequence of four (4) pictures was presented on each trial and memory was tested for pictures at each position after various delays.
When subjects were tested immediately after a trial, recall was highest for the last picture.
However, when recall was tested after the longest delay, recall was highest for the first picture.