Different behavioral observation methods serve different purposes.
Craig
Kenneth D
KD
Department of Psychology, University of British Columbia, 2136 West Mall, Vancouver, BC, Canada V6T 1Z4 University of Regina, 3737 Wascana Parkway, Regina, Sask., Canada S4S 0A2.
Hadjistavropoulos
Thomas
T
D004314:Down Syndrome / Q000503:physiopathology; D006801:Humans; D008607:Intellectual Disability / Q000503:physiopathology*; D010146:Pain / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D010147:Pain Measurement / Q000379:methods*