All 4 faces pain scales were found to be adequately supported by psychometric data .
When given a choice between faces scales , children preferred the WBFPRS .
Confounding of pain intensity with affect caused by use of smiling and crying anchor faces is a disadvantage of the WBFPRS .
: For clinical use , we found no grounds to switch from 1 faces scale to another when 1 of the scales is in use .
CONTEXT : Numerous faces scales have been developed for the measurement of  pain intensity in children .
It remains unclear whether any one of the faces scales is better for a particular purpose with regard to validity , reliability , feasibility , and preference .
OBJECTIVES : To summarize and systematic ally review faces pain scales most commonly used to obtain self-report of pain intensity in children for evaluation of reliability and validity and to compare the scales for preference and utility .
Pain in 4- to 6-year-old children receiving intramuscular injections: a comparison of the Faces Pain Scale with other self-report and behavioral measures.
OBJECTIVE The main objective was to compare the utility of the Faces Pain Scale  ( Bieri et al. , 1990 ) with three alternative self-report measures of pain intensity in children , as well as with pain ratings based on observations of the child 's behavior . DESIGN Fifty children used 4 self-report scales to rate the severity of needle pain from routine immunization . Using videotapes , the child 's pain-related behavior was coded in detailed fashion , and a subset of the sample were also rated globally by 60 registered pediatric nurses . MAIN OUTCOME MEASURES  Faces Pain Scale ; Poker Chip Tool ; Visual Analogue Toy ; Verbal Rating Scale ;  behavioral checklist ( scoring observable facial , motor , verbal and vocal reactions ) . RESULTS AND CONCLUSIONS The  Faces Pain Scale  was simple to use , readily understood by the children , and showed a realistic distribution of scores with respect to the type of pain being measured . With the exception of verbal reactions ( which were not meaningfully related to self-report ) , observer ratings based on detailed coding of the child 's behavior correlated only poorly to moderately well with self-report scores ( r = .39 to r = .58 ) . Similarly , although confident in their judgments , the nurses ' ratings showed only moderate agreement with those of the children . In estimating the child 's pain , all observers appeared to appropriately weigh changes in the child 's facial behavior , which showed evidence of being the most sensitive behavioral index to the intensity of short sharp ( needle ) pain in 4 to 6 years olds
All 4 faces pain scales were found to be adequately supported by psychometric data .
When given a choice between faces scales , children preferred the WBFPRS .
Confounding of pain intensity with affect caused by use of smiling and crying anchor faces is a disadvantage of the WBFPRS .
: For clinical use , we found no grounds to switch from 1 faces scale to another when 1 of the scales is in use .
CONTEXT : Numerous faces scales have been developed for the measurement of  pain intensity in children .
It remains unclear whether any one of the faces scales is better for a particular purpose with regard to validity , reliability , feasibility , and preference .
OBJECTIVES : To summarize and systematic ally review faces pain scales most commonly used to obtain self-report of pain intensity in children for evaluation of reliability and validity and to compare the scales for preference and utility .