TABLE 3.

Descriptive statistics and correlations with the SVS-GM3 and SVS-GM1 of the applied measures in study 1.

Measure	Time perspective	N	M	SD	Range	Correlation coefficient
						SVS-GM3	SVS-GM1
Positive affect	Past	143	3.24	0.65	1–5	0.70**	0.71**
	Present	143	2.81	0.83	1–5	0.67**	0.72**
	Future	143	3.45	0.67	1–5	0.67**	0.59**
Negative affect	Past	143	1.94	0.58	1–5	−0.47**	−0.39**
	Present	143	1.45	0.51	1–5	−0.22**	−0.21*
	Future	143	1.60	0.54	1–5	−0.47**	−0.42**
Satisfaction with life	Past	143	23.58	5.81	1–7	0.64**	0.61**
	Present	143	24.53	5.85	1–7	0.49**	0.41**
	Future	143	25.17	5.29	1–7	0.55**	0.46**
Fatigue	Past	183	4.37	2.33	0–10	−0.59**	−0.59**
	Present	183	4.07	2.63	0–10	−0.51**	−0.52**
	Future	183	3.86	2.54	0–10	−0.39**	−0.43**
Self-efficacy	Trait	100	30.11	3.64	10–40	0.50**	0.45**
Optimism	Trait	100	22.56	3.62	6–30	0.26**	0.17

* indicates p < 0.05. ** indicates p < 0.01.

SVS-GM3, 3-item modified German Subjective Vitality Scale; SVS-GM1, 1-item modified German Subjective Vitality Scale.