The Sample One-Experiment Paper (Figure 2.1, p.41) does show a page number on the title page.
For more information on title pages, please see "How do I format titles and title pages?"
All information and page number references are based on the 6th edition of the Publication Manual of the American Psychological Association (2009/10).
Need a copy of the Publication Manual? Click here for details. See Also: APA Style Guide to Electronic References, Sixth Edition