Inventory of interpersonal problems-32 (IIP-32): Psychometric properties in adolescents from Argentina

Figures & data

Figure 1. Subscales and dimensions of the circumplex model of the Inventory of interpersonal problems (Horowitz et al., 2000).

Table 1. Descriptive analyses and corrected item-scale correlations of the IIP-32 items

Item	Mean	SD	Scale	r
Item 1	1.95	1.26	JK	.49
Item 2	1.96	1.27	FG	.62
Item 3	1.14	1.14	NO	.24
Item 4	1.37	1.31	HI	.46
Item 5	1.85	1.31	FG	.66
Item 6	1.76	1.33	HI	.34
Item 7	1.70	1.20	HI	.64
Item 8	1.48	1.29	JK	.32
Item 9	1.68	1.37	FG	.58
Item 10	1.62	1.29	DE	.48
Item 11	1.17	1.19	DE	.52
Item 12	1.52	1.24	HI	.56
Item 13	1.53	1.37	DE	.51
Item 14	0.81	1.30	BC	.76
Item 15	1.52	1.23	DE	.54
Item 16	0.96	1.23	BC	.74
Item 17	1.37	1.21	BC	.50
Item 18	0.89	1.32	BC	.76
Item 19	1.53	1.25	FG	.43
Item 20	1.90	1.32	JK	.31
Item 21	1.53	1.16	NO	.40
Item 22	0.75	0.91	PA	.48
Item 23	1.88	1.32	LM	.59
Item 24	0.87	0.99	NO	.31
Item 25	0.82	1.01	PA	.50
Item 26	1.64	1.28	LM	.67
Item 27	1.59	1.18	LM	.54
Item 28	0.69	0.93	PA	.52
Item 29	1.01	1.13	NO	.52
Item 30	1.07	1.06	PA	.43
Item 31	0.97	1.09	JK	.46
Item 32	1.78	1.19	LM	.36

Notes. SD = Standard deviation. For scale references see Figure 1.

Table 2. Descriptive analyses of the IIP-32 total score and scales

Scales	Mean	SD	Range
PA	0.83	0.71	[0; 3.5]
BC	1.01	1.04	[0; 4]
DE	1.46	0.95	[0; 4]
FG	1.75	1.00	[0; 4]
HI	1.59	0.93	[0; 4]
JK	1.58	0.85	[0; 4]
LM	1.72	0.94	[0; 4]
NO	1.14	0.74	[0; 3.5]
Total	1.39	0.50	[0.22; 2.91]

Note: Mean item scores were used to calculate total and subscale scores.

Table 3. Cronbach’s alpha, ordinal alpha and McDonald’s Omega for IIP-32 scales

Scales	Cronbach’s alpha	Ordinal alpha	McDonald’s Omega
PA	.70	.76	.76
BC	.85	.88	.90
DE	.73	.77	.81
FG	.77	.80	.83
HI	.71	.75	.79
JK	.61	.66	.69
LM	.74	.77	.79
NO	.58	.63	.67
TOTAL	.84	.86	.90

Table 4. Parameters and coefficients of determination of the confirmatory factor model

Item	λ (Subscale)	λ Global IIP	θδ
Item 22	.58 (PA)	.18	.64
Item 25	.74 (PA)	.11	.45
Item 28	.78 (PA)	.05	.39
Item 30	.49 (PA)	.20	.72
Item 14	.60 (BC)	.70	.15
Item 16	.56 (BC)	.63	.29
Item 17	.58 (BC)	.24	.60
Item 18	.63 (BC)	.66	.18
Item 10	.48 (DE)	.45	.56
Item 11	−.02 (DE)	.87	.25
Item 13	.54 (DE)	.49	.47
Item 15	.20 (DE)	.68	.50
Item 2	.73 (FG)	.31	.37
Item 5	.76 (FG)	.38	.28
Item 9	.49 (FG)	.60	.40
Item 19	.28 (FG)	.50	.67
Item 4	.46 (HI)	.36	.66
Item 6	.28 (HI)	.41	.75
Item 7	.83 (HI)	.40	.15
Item 12	.54 (HI)	.54	.42
Item 1	.75 (JK)	.17	.41
Item 8	.38 (JK)	.33	.74
Item 20	.39 (JK)	.01	.85
Item 31	.72 (JK)	.12	.47
Item 23	.73 (LM)	.17	.44
Item 26	.90 (LM)	.08	.18
Item 27	.66 (LM)	.11	.55
Item 32	.42 (LM)	.08	.82
Item 3	.39 (NO)	.30	.76
Item 21	.63 (NO)	−.15	.57
Item 24	.42 (NO)	.05	.82
Item 29	.81 (NO)	−.32	.34

Note. SD = Standard deviation. For scale references see Figure 1.

Table 5. Comparison of the CFA model indices

	CFI	TLI	RMSEA [CI90%]	Independence CAIC	Model CAIC
Bifactor	.93	.91	.068 [.064–.071]	17.021.225	2.276.148
Unidimensional	.57	.54	.162 [.159–.165]	17.021.225	7.936.490
Second-order	.91	.90	.073 [.069–.076]	17.021.225	2.393.483

Table 6. Correlations of IIP-32 subscales and CAIS subscales

	IIP_PA	IIP_BC	IIP_DE	IIP_FG	IIP_HI	IIP_JK	IIP_LM	IIP_NO
CAIS_PA	.23*
CAIS_BC		.13*
CAIS_DE			.13*
CAIS_FG				.40*
CAIS_HI					.33*
CAIS_JK						.16*
CAIS_LM							.41*
CAIS_NO								.16*

Note. Correlations * = p < .001.

Horowitz, L. M., Alden, L. E., Wiggins, J. S., & Pincus, A. L. (2000). IIP, Inventory of interpersonal problems manual. The Psychological Corporation.

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