Principal components analyses yielded four physician and five patient communication
composites (mean alpha = .77). Some evidence for concurrent validity was provided (5 of 18 correlations
with communication validation rating scale were significant). Paired-sample t tests showed significant
differences for 4 patient PCAP composites, showing the PCAP scale discriminates between high and low
pain patients’ communication.
Conclusion: The PCAP scale shows partial evidence of reliability and two forms of validity.
Practice implications: More research with this scale (developing more reliable and valid composites) is
needed to extend these preliminary findings before this scale is applicable for use in practice