Verbal "versus" material rewards as a function of schedule and set in children's discrimination preference choice behavior

WITRYOL, SAM L. ; LOWDEN, LYNN M. ; FAGAN, JOSEPH F. ; BERGEN, TINA C.

Provincetown, Mass., etc. : Periodicals Archive Online (PAO)
Published 1968

ISSN:	0022-1325
Topics:	Psychology
URL:	http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3284-1968-113-01-000001