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 .
Accuracy of children's pain memories
Abstract Despite its importance in clinical practice , little research has examined memory for pain in children . This prospect i ve study tried to justify the use of  children 's pain recall  in clinical practice . The purpose of this study was to ( a ) investigate the accuracy of children 's recall of their worst and average pain intensity when controlling for the effects of repeated pain measurement and ( b ) examine the influence of children 's anxiety , age , general memory ability and pain coping strategies on this accuracy . The accuracy of children 's  recalled pain intensities was studied in 55 in patients aged 5–16 years by comparing the level of recorded pain intensity with the level of recalled pain intensity  1 day and 1 week after recording using Bieri 's Faces Pain Scale .  The accuracy of children 's recalled pain intensities was high and showed little decrement over 1 week . Older children had more accurate recall of their worst pain intensity . Anxiety , general memory ability and pain coping strategies were not related to accuracy of recalled pain intensities
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 .