Psychometric properties of a Korean version of the Perceived Stress Scale (PSS) in a military sample

BMC Psychology

Table 3 Rasch Rating Scale Model (RSM) Analyses

KPSS Item		Difficulty	Estimated Discrimination	Infit MNSQ	Outfit MNSQ	PTMEA
Item 3 (14)	Cannot overcome mounting difficulties	1.22	1.23	0.82	0.80	0.66
Item 1 (2)	Unable to control the important things	1.03	.93	1.10	1.14	0.60
Item 6 (5)	Effectively cope with important changes in your life	0.02	1.21	0.82	0.81	0.66
Item 7 (6)	Confident about your ability to handle your problems	0.02	1.18	0.84	0.83	0.68
Item 9 (10)	Feel that you are on top of things	−0.17	1.33	0.70	0.69	0.70
Item 4 (1)	Upset because of something that happened unexpectedly	−0.23	.79	1.21	1.22	0.64
Item 2 (3)	Feel nervous or stressed	−0.24	.84	1.16	1.14	0.68
Item 8 (7)	Feel that things are going your way	−0.45	1.38	0.63	0.64	0.75
Item 10 (11)	Feel angry because of things that happened that are outside of your control	−0.48	.82	1.15	1.17	0.59
Item 5 (4)	Deal successfully with day-to-day problems and annoyances	−0.73	.40	1.58	1.66	0.42

Note. KPSS10 is Korean version of the Perceived Stress Scale 10 items; numbers in parentheses refer to the original number of the PSS-14 [1]; difficulty means perceived stress severity level; infit/outfit statistics in bold are larger than 1.4 and indicate misfit; PTMEA = the point-measure correlation

ISSN: 2050-7283