Does job satisfaction mediate the nexus between perceived organizational justice and organizational citizenship behavior? Empirical evidence from Ethiopian Public Higher Education Institutions

Figures & data

Figure 1. Conceptual model.

Table 4. Summary of the direct effect.

Relationship	Estimate	SE	CR	P
POJ -> EJS	0.455	0.109	6.000	***
POJ -> OCB	0.321	0.068	3.257	***
EJS -> OCB	0.290	0.043	3.227	***
Gender-> OCB	0.055	0.096	0.965	0.334
Age -> OCB	−0.018	0.057	−0.295	0.771
Education -> OCB	−0.057	0.069	−1.006	0.314
Experience -> OCB	0.120	0.056	1.903	0.057

OCB: Organizational Citizenship Behavior; POJ: Perceived Organizational Justice; EJS: Employee Job Satisfaction. Significance of correlation *** p < .001.

Table 1. Mean, standard deviation, and correlations among the study variables.

	Variables	Mean	SD	1	2	3	4	5	6	7
1	Perceived Organizational Justice	3.15	0.793	1
2	Organizational Citizenship Behavior	3.76	0.806	0.381* *	1
3	Employee Job Satisfaction	3.09	1.155	0.379**	0.350**	1
4	Gender	1.35	0.479	−0.027	0.051	0.040	1
5	Age	2.02	0.891	0.054	0.022	0.121*	−0.134*	1
6	Educational level	3.26	0.661	−0.050	−0.062	0.035	−0.077	0.102	1
7	Experience	2.21	0.909	0.106	0.106	0.076	−0.085	0.449**	0.013	1

**Correlation is significant at the 0.01 level (2-tailed).

*Correlation is significant at the 0.01 level (2-tailed).

N = 312. Gender (1 = male, 2 = female); Age (1 = 20–30, 2 = 31–40, 3 = 41–50, 4 = 51–60, 5 = above 60); Educational level (1 = certificate or less, 2 = deploma, 3 = bachelor degree, 4 = master’s degree, 5 = PhD or above); Experience (1 = 1–5).

Figure 2. Measurement model of the study.

Table 2. Loadings, reliability, and convergent validity.

Items	Standardize Loadings	Cronbach’s Alpha (α)	Composite Reliability (CR)	Average variance extracted (AVE)
Perceived Organizational Justice		0.905	0.749	0.510
PDJ3	0.744
PDJ5	0.732
PPJ1	0.738
PPJ2	0.810
PPJ3	0.825
PPJ4	0.755
PIJ4	0.712
PIJ5	0.762
PIJ6	0.837
PIJ7	0.922
PIJ8	0.784
PIJ9	0.852
Organizational Citizenship Behavior		0.865	0.711	0.553
OCBI1	0.808
OCBI2	0.651
OCBI4	0.894
OCBI8	0.615
OCBO4	0.642
OCBO6	0.805
OCBO7	0.843
OCBO8	0.940
Employee Job Satisfaction		0.860	0.861	0.675
EJS1	0.850
EJS2	0.815
EJS4	0.797

Table 3. Discriminant validity of the study.

Constructs	OCB	POJ	EJS
OCB	0.743
POJ	0.452***	0.714
EJS	0.436***	0.455***	0.821

OCB: Organizational Citizenship Behavior; POJ: Perceived Organizational Justice; EJS: Employee Job Satisfaction. Significance of correlation *** p < .001.

Figure 3. Structural model of the study.

Table 5. Indirect effect of job satisfaction.

			Confidence Interval
Relationship	Direct	Indirect	Lower bound	Upper bound	p-value	Decision
POJ -> EJS -> OCB	0.321	0.132	0.060	0.228	.001	Partial mediation

POJ: Perceived Organizational Justice; EJS: Employee Job satisfaction; OCB: Organizational Citizenship Behavior.