Journal List > J Korean Acad Nurs > v.45(1) > 1003045

Kim and Jung: Psychometric Properties of the Alzheimer's Disease Knowledge Scale-Korean Version

Abstract

Purpose

The purpose of this study was to evaluate the psychometric properties of the Korean version of the Alzheimer's Disease Knowledge Scale (ADKS-K) to determine its applicability to Korean adults.

Methods

Cross-cultural validity was performed according to Consensus-based Standards for the Selection of Health Measurement Instruments (COSMIN). The Kuder-Richardson Formula 20 for internal consistency and Intraclass Correlation Coefficient (ICC) for test-retest reliability were conducted. Content validity, criterion related validity and construct validity were evaluated. The Classical Test Theory (CTT) model and the Item Response Theory (IRT) model were applied in performing the item analysis.

Results

The KR 20 was .71, and the ICC was .90, indicating that the ADKS-K has internal consistency and stability reliability. Thirty items of the ADKS-K had significant Content Validity Ratio (CVR) values, i.e., mean of 0.82 and range of 0.60~1.00. Mean item difficulty and discrimination indices calculated by TestAn program were 0.63 and 0.23, respectively. Mean item difficulty and discrimination indices calculated by BayesiAn program were -0.60 and 0.77, respectively. These tests indicate that ADKS-K has an acceptable level of difficulty and discriminating efficiency.

Conclusion

Results suggest that ADKS-K has the potential to be a proper instrument for assessing AD knowledge in Korean adults.

Figures and Tables

Table 1

General Characteristics and ADKS-K Score (N=575)

jkan-45-107-i001

*Scheffé post Hoc test; ADKS-K=Alzheimer's Disease Knowledge Scale-Korean; KR-20=Kuder-Richardson Formula 20; AD=Alzheimer's Disease

Table 2

Pearson Correlation Coefficient and Intraclass Correlation Coefficient for Test-retest (N=40)

jkan-45-107-i002

ICC=Intra correlation coefficient; CI=Confidence interval.

Table 3

Pearson Correlation Coefficient between Dementia Score and K-ADKS Score (N=575)

jkan-45-107-i003

ADKS-K=Alzheimer's Disease Knowledge Scale-Korean.

Table 4

Individual Item Properties Using Classic Test Theory and Item Response Theory and Content Validity Index

jkan-45-107-i004

CVR=Content validity ratio; CTT=Classic test theory; IRT=Item response theory.

References

1. Ministry of Health & Welfare. Nine point one eight prevalence of dementia in 2012, each 2-fold increase in 20 years with dementia can [Internet]. Sejong: Author;2013. cited 2014 July 30. Available from: http://www.mw.go.kr/front_new/al/sal0301vw.jsp?PAR_MENU_ID=04&MENU_ID=0403&CONT_SEQ=286138&page=1.
2. Alzheimer's Association. 2011 Alzheimer' disease facts and figures. Alzheimers Dement. 2011; 7(2):208–244. DOI: 10.1016/j.jalz.2011.02.004.
3. Go SM, Lee KS, Seo SW, Chin J, Kang SJ, Moon SY, et al. Survival of Alzheimer's disease patients in Korea. Dement Geriatr Cogn Disord. 2013; 35(3-4):219–228. DOI: 10.1159/000347133.
4. Jorm AF, Korten AE, Jacomb PA, Christensen H, Rodgers B, Pollitt P. "Mental health literacy": A survey of the public's ability to recognise mental disorders and their beliefs about the effectiveness of treatment. Med J Aust. 1997; 166(4):182–186.
5. Carpenter BD, Balsis S, Otilingam PG, Hanson PK, Gatz M. The Alzheimer's disease knowledge scale: Development and psychometric properties. Gerontologist. 2009; 49(2):236–247. DOI: 10.1093/geront/gnp023.
6. Jang Y, Kim G, Chiriboga D. Knowledge of Alzheimer's disease, feelings of shame, and awareness of services among Korean American elders. J Aging Health. 2010; 22(4):419–433. DOI: 10.1177/0898264309360672.
7. Wang JJ, Hsieh PF, Wang CJ. Long-term care nurses' communication difficulties with people living with dementia in Taiwan. Asian Nurs Res. 2013; 7(3):99–103. DOI: 10.1016/j.anr.2013.06.001.
8. Kim NC. A study on the knowledge and attitude about senile dementia of the elderly. J Korea Community Health Nurs Acad Soc. 1999; 13(2):1–11.
9. Cho HO. A study on public's knowledge of and attitude towards dementia [master's thesis]. Seoul: Hanyang University;1999.
10. Hwang E, Kim B, Kim H. A study on dementia-related knowledge and attitudes in adolescents. Korean J Rehabil Nurs. 2013; 16(2):133–140.
11. Ko SJ, Shin SH. Effects of dementia knowledge, self-efficacy and depression on dementia preventive behavior in elderly couples: Dyadic data analysis. J Korean Acad Nurs. 2013; 43(2):276–286. DOI: 10.4040/jkan.2013.43.2.276.
12. Spector A, Orrell M, Schepers A, Shanahan N. A systematic review of 'knowledge of dementia' outcome measures. Ageing Res Rev. 2012; 11(1):67–77. DOI: 10.1016/j.arr.2011.09.002.
13. Dieckmann L, Zarit SH, Zarit JM, Gatz M. The Alzheimer's disease knowledge test. Gerontologist. 1988; 28(3):402–407.
14. Barrett JJ, Haley WE, Harrell LE, Powers RE. Knowledge about Alzheimer disease among primary care physicians, psychologists, nurses, and social workers. Alzheimer Dis Assoc Disord. 1997; 11(2):99–106.
15. Gilleard C, Groom F. A study of two dementia quizzes. Br J Clin Psychol. 1994; 33(Pt 4):529–534.
16. Kuhn D, King SP, Fulton BR. Development of the knowledge about memory loss and care (KAML-C) test. Am J Alzheimers Dis Other Demen. 2005; 20(1):41–49.
17. Cooke DD, McNally L, Mulligan KT, Harrison MJ, Newman SP. Psychosocial interventions for caregivers of people with dementia: A systematic review. Aging Ment Health. 2001; 5(2):120–135. DOI: 10.1080/713650019.
18. Lee EO, Im NY, Park HA, Lee IS, Kim JI, Bae JI, et al. Nursing research and statistical analysis. Paju: Soomoonsa;2009.
19. Williams B, Brown T, Onsman A. Exploratory factor analysis: A five-step guide for novices. Aust J Paramed. 2012; 8(3):1–13.
20. Reise SP, Ainsworth AT, Haviland MG. Item response theory: Fundamentals, applications, and promise in psychological research. Curr Dir Psychol Sci. 2005; 14(2):95–101.
21. Cangelosi JS. Designing tests for evaluating student achievement. New York, NY: Longman Publishing Group;1990.
22. Seong TJ. Understanding and application of item response theory. Paju: Kyoyookbook;2001.
23. Ebel RL. Measuring educational achievement. Englewood Cliffs, NJ: Prentice-Hall;1965.
24. Kang H. A guide on the use of factor analysis in the assessment of construct validity. J Korean Acad Nurs. 2013; 43(5):587–594. DOI: 10.4040/jkan.2013.43.5.587.
25. Kim MS, Kwon KJ, Kim JA, Kim JH, Kim HJ, Rho HK, et al. Nursing research methodology. Seoul: Jungdam Media;2011.
26. Landis JR, Koch GG. The measurement of observer agreement for categorical data. Biometrics. 1977; 33(1):159–174.
27. Lawshe CH. A quantitative approach to content validity. Pers Psychol. 1975; 28(4):563–575. DOI: 10.1111/j.1744-6570.1975.tb01393.x.
28. Shipley WC. A self-administering scale for measuring intellectual impairment and deterioration. J Psychol. 1940; 9(2):371–377. DOI: 10.1080/00223980.1940.9917704.
29. Nordhus IH, Sivertsen B, Pallesen S. Knowledge about Alzheimer's disease among Norwegian psychologists: The Alzheimer's disease knowledge scale. Aging Ment Health. 2012; 16(4):521–528. DOI: 10.1080/13607863.2011.628973.
TOOLS
Similar articles