Testing the psychometric properties of a short skills inventory for students looking for their first job

BMC Psychology

Table 7 Item difficulty, standard error, infit and outfit statistics and correlations

			Infit		Outfit
Skill/Item number	Item difficulty	SE	MNSQ	ZSTD	MNSQ	ZSTD	PTMEA
Analyzing and interpreting
AI1	0.29	0.18	1.05	0.40	1.08	0.60	0.74
AI2	1.09	0.18	0.99	0.01	1.01	0.10	0.73
AI3	− 0.37	0.19	1.07	0.60	1.10	0.70	0.63
Supporting and cooperating
SC4	0.78	0.16	1.21	1.50	1.16	1.20	0.69
SC5	− 0.17	0.17	0.89	− 0.70	1.06	0.40	0.65
SC6	− 0.12	0.17	0.76	− 1.80	0.73	− 2.00	0.75
Interacting and presenting
IP7	0.46	0.14	1.24	1.70	1.18	1.40	0.60
IP8	− 0.32	0.15	1.27	1.80	1.18	1.30	0.60
IP9	− 0.30	0.15	1.01	0.10	0.91	− 0.60	0.74
Leading and deciding
LD10	− 0.25	0.18	1.26	1.80	1.16	1.20	0.68
LD11	0.81	0.18	0.86	-1.00	0.86	− 1.10	0.76
LD12	− 0.48	0.18	0.79	− 1.70	0.74	− 2.00	0.85
Creating and conceptualizing
CC13	− 0.46	0.19	1.12	1.00	1.10	0.70	0.61
CC14	0.05	0.18	1.05	0.50	1.06	0.50	0.65
CC15	− 2.20	0.23	1.03	0.20	0.84	− 0.50	0.49
Organizing and executing
OE16	2.15	0.15	1.22	1.50	1.20	1.40	0.51
OE17	1.47	0.15	1.15	1.10	1.14	1.10	0.63
OE18	− 2.11	0.21	1.09	0.60	0.86	− 0.40	0.51
Adapting and coping
AC19	− 0.77	0.18	0.92	− 0.60	0.84	− 1.00	0.67
AC20	− 0.46	0.17	0.89	− 0.80	0.89	− 0.70	0.69
AC21	1.39	0.15	0.75	− 1.90	0.79	− 1.60	0.68
Enterprising and performing
EP22	1.94	0.13	1.10	0.80	1.07	0.60	0.66
EP23	0.10	0.14	1.06	0.50	1.04	0.30	0.67
EP24	0.48	0.14	0.86	− 1.10	0.86	− 1.00	0.76

Item difficulty measured in logits (negative values indicate easier questions)
SE Standard error, MNSQ mean square (values between 0.70 and 1.30 are within acceptable limits for the Rasch model), ZSTD value of t-test (values between − 2 and + 2 are within acceptable limits for the Rasch model), PTMEA correlations (values between 0.40 and 0.85 are within acceptable limits for the Rasch model)

ISSN: 2050-7283