I'm hoping the serials catalogers out there can help me with this one:

What do you do when a title puts out a regularly-issued supplement with its
own title and numbering?  In this case, it's Psychological Science, which
now has a supplement called Psychological Science in the Public Interest.
The latter has a subtitle, A Journal of the American Psychological Society,
an indication to me that it is a separate journal.  The supplement is
published in May and Nov and has its own volume numbering with two numbered
issues per year.  It apparently is not available as a subscription separate
from its parent title.  Publication information lists the title and ISSN for
Psychological Science.

So:  Should this "supplement" have every issue listed separately as
supplements on the bib record and serials copy record for the parent title?
(Our ILS does not have a way to show two main runs on one bib record, unless
they are separate formats.)  Or should there be a separate marc record for
the creature?

Yours, perplexed,
Lynne N. Stevens
Serials Coordinator
Lipscomb Library
Randolph-Macon Woman's College
2500 Rivermont Avenue
Lynchburg, VA  24503
804 947-8133
lstevens@rmwc.edu