Psychometric Properties of the Apathy Scale in Advanced Parkinson’s Disease

Table 2

Acceptability data of the apathy scale.

Item	Min	Max	Mean	SD	Median	Floor (%)	Ceiling (%)	Skew
1. Interested in learning?	0	3	0.92	0.98	1	45.0	6.7	0.60
2. Anything interest you?	0	2	0.45	0.62	0	61.7	0.0	1.04
3. Concern about your condition?	0	3	0.38	0.74	0	75.0	1.7	1.81
4. Much effort into things?	0	2	0.42	0.70	0	70.0	0.0	1.37
5. Looking for something to do?	0	3	0.80	1.02	0	53.3	10.0	0.98
6. Plans and goals for the future?	0	3	1.42	1.06	1	23.3	20.0	0.13
7. Do you have motivation?	0	3	1.00	1.03	1	43.3	8.3	0.48
8. Energy for daily activities?	0	3	1.33	0.86	1	20.0	5.0	−0.21
9. Someone tells you what to do?	0	3	0.62	0.96	0	65.0	6.7	1.30
10. Indifferent to things?	0	3	0.62	0.83	0	58.3	1.7	0.99
11. Unconcerned with things?	0	3	1.00	0.96	1	35.0	10.0	0.70
12. Need to be pushed?	0	3	0.87	0.98	1	46.7	8.3	0.81
13. Neither happy nor sad?	0	3	1.23	1.00	1	26.7	13.3	0.35
14. Consider yourself apathetic?	0	3	0.50	0.85	0	70.0	3.3	1.48
Total score	1	24	11.55	6.49	10	3.3	3.3	0.32

Max, maximum; Min, minimum; SD, standard deviation; Skew, skewness.