Developing a dyadic OPTION scale to measure perceptions of shared decision making.
OBJECTIVE
Our aim was to develop a measurement which enables research into the interdependent nature of clinical encounters. The prime objective was to develop an instrument capable of assessing the extent to which patients have been involved in (shared) decision making from two viewpoints-that of the patient and the clinician.


METHODS
To develop an initial 'dyadic OPTION' instrument, the twelve original third-person items were drafted in passive, first person plural forms. Using this version initially, three rounds of cognitive debriefing interviews were held. These were audio-recorded and analysed at the end of each round and the results used to revise the dyadic OPTION scale.


RESULTS
It was possible to modify the observer OPTION instrument into an instrument for completion by both clinicians and patients after a dyadic interaction. Cognitive debriefing revealed five areas of interpretative difficulty. Each item of the observer OPTION scale underwent modification in order to develop a dyadic version of the scale.


CONCLUSIONS
The dyadic OPTION scale is acceptable and comprehensible by both clinicians and public respondents. Cognitive debriefing adapted and refined an existing scale and provided confidence that the core constructs of the scale (perceived involvement in decisions making) were understood.


CONCLUSIONS
Further validation of the dyadic OPTION scale is required prior to its use in research settings.
Melbourne
Emma
E
Department of Primary Care and Public Health, Cardiff University, Cardiff CF14 4XN, United Kingdom.
Sinclair
Kate
K
Durand
Marie-Anne
MA
Légaré
France
F
Elwyn
Glyn
G
D000293:Adolescent; D000328:Adult; D000368:Aged; D003657:Decision Making; D005194:Family Practice; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010358:Patient Participation; D018802:Patient-Centered Care; D010465:Perception; D010817:Physician-Patient Relations; D011594:Psychometrics / Q000295:instrumentation*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D055815:Young Adult