방법 비교

	De Jong Gierveld 외로움 척도 (DJGLS)	우정의 질 척도(Friendship Quality Questionnaire, FQQ)
분야	사회심리학	사회심리학
계열	Process / pipeline	Process / pipeline
기원 연도	1985	1993
창시자	Jenny De Jong Gierveld and Fons Kamphuis	Jeffrey Parker and Steven Asher (developmental version); expanded by Bukowski and others
유형	Self-report questionnaire	Self-report friendship assessment
원전	De Jong Gierveld, J., & Kamphuis, F. (1985). The development of a Rasch-type loneliness scale. Applied Psychological Measurement, 9(4), 289-299.	Parker, J. G., & Asher, S. R. (1993). Friendship and friendship quality in middle childhood: Links with peer group acceptance and feelings of loneliness and social dissatisfaction. Developmental Psychology, 29(4), 611-621.
별칭	DJGLS, De Jong-Gierveld Scale, 11-item Loneliness Scale	FQQ, Friendship Quality Index, Friendship Assessment Scale
관련	3	3
요약	The De Jong Gierveld Loneliness Scale is one of the most extensively used brief instruments for measuring loneliness in population surveys, clinical research, and gerontological studies. Developed by Jenny De Jong Gierveld and Fons Kamphuis in 1985, the 11-item scale (with a shorter 6-item version available) measures emotional and social dimensions of loneliness, based on the theory that loneliness arises from a discrepancy between desired and actual social relationships. The DJGLS is valued for its brevity, ease of administration, strong psychometric properties, and widespread availability in 30+ languages.	The Friendship Quality Questionnaire is a self-report instrument designed to assess the quality and characteristics of friendships in children, adolescents, and adults. Developed by Jeffrey Parker and Steven Asher in 1993 and expanded by Bukowski and colleagues, the FQQ measures dimensions of friendship quality including companionship (spending time together), conflict, help and guidance, intimate disclosure, closeness, loyalty, and conflict resolution. The FQQ is widely used in developmental psychology, peer relationship research, and clinical assessment of social functioning across the lifespan.