psychometric properties of the friendship self-regulation questionnaire (srq-f) at the emerging adulthood

Perpose: the purpose of this study was to investigate the psychometric properties of the friendship self-regulation questionnaire (srq-f) in students. methodology: in a descriptive-correlation and validation study, 216 and 226 graduate students from ferdowsi university of mashhad selected through multi-stage sampling method. data were collected using the friendship self-regulation questionnaire (ryan & connell, 1989), basic need satisfaction in relationships (laguardia, et all, 2002) and subjective vitality scale-state level version (ryan & frederick, 1997). internal consistency, exploratory and confirmatory factor analysis and criterion validity were analyzed. findings: the results showed that the scale had four-factor structure with the variance explained 67.20%. the confirmatory factor analysis was confirmed. the scale had good construction reliability. the criterion validity confirmed in relation to basic need satisfaction in relationships and subjective vitality in friendship (p≤0.01). conclusion: the friendship self-regulation questionnaire (srq-f) had good internal consistency as well as exploratory and confirmatory validity in students. this questionnaire can be used as a valid instrument in future studies.