Katie's mother is on the phone when she tells katie to remember a phone number, which she then says aloud. katie keeps repeating it to herself until her mother gets off the phone and can enter it into her cell phone. katie is employing:

Rehearsal technique

Explanation:

Rehearsal is a mental technique which involves repeating a particular information several times in other to enhance the retention to memory of such information and enabling easy recall of such information later on when needed.

In order for Katie to remember the phone number said by her mum, she commits the umber to memory by repeating it to herself, which enables her to easily recall after her mum ends the call.

Katie is employing a memory exercise that aid her retention.

Explanation: Saying information out loud can increase your chances of remembering it later, research says. In a study published in the journal Memory, subjects who read written information out loud showed a five to 15 percent boost in retention.