Answered By: Gabe Gossett Last Updated: Jan 14, 2016 Views: 260
From the APA Manual, page 229, "The running head should be a maximum of 50 characters, counting letters, punctuation, and spaces between words. It should appear flush left in all uppercase letters at the top of the title page."
Note that on the title page you should place the text "Running head:" before your running head. On all subsequent pages you should only have the text of the running head.
On the title page it should be "Running head: ABBREVIATED TITLE IN CAPS" (no more than 50 characters).
On all other pages it should be "ABBREVIATED TITLE IN CAPS."
To create a unique header on the first page in Word click on this link to see this support article from Microsoft.