Abrahams, S. (2011). Social cognition in amyotrophic lateral sclerosis. Neurodegenerative Disease Management, 1, 397–405.
Chase, T. N. (2011). Apathy in neuropsychiatric disease: diagnosis, pathophysiology and treatment. Neurotoxicity Research, 19, 266–278.
et al. (2007). Apathy in dementia: an examination of the psychometric properties of the apathy evaluation scale. The Journal of Neuropsychiatry and Clinical Neurosciences, 19, 57–64.
et al. (2008). Apathy in dementia: clinical and sociodemographic correlates. The Journal of Neuropsychiatry and Clinical Neurosciences, 20, 337–347.
Clarke, D. E.
et al. (2011). Are the available apathy measures reliable and valid? A review of the psychometric evidence. Journal of Psychosomatic Research, 70, 73–97.
Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16, 297–334.
Cummings, J. L.
et al. (1994). The Neuropsychiatric Inventory comprehensive assessment of psychopathology in dementia. Neurology, 44, 2308–2308.
et al. (2010). The Neuropsychiatric Inventory-Clinician rating scale (NPI-C): reliability and validity of a revised assessment of neuropsychiatric symptoms in dementia. International Psychogeriatrics, 22, 984–994.
Dujardin, K., Sockeel, P., Delliaux, M., Destée, A. and Defebvre, L. (2008). The lille apathy rating scale: validation of a caregiver-based version. Movement Disorders, 23, 845–849.
Dujardin, K., Sockeel, P., Delliaux, M., Destée, A. and Defebvre, L. (2009). Apathy may herald cognitive decline and dementia in Parkinson's disease. Movement Disorders, 24, 2391–2397.
et al. (2007). Characteristics of apathy in Parkinson's disease. Movement Disorders, 22, 778–784.
George, D. and Mallery, P. (2003). SPSS for Windows Step by Step: A Simple Guide and Reference. 11.0 Update, 4th edn, Boston: Allyn and Bacon.
Girardi, A., MacPherson, S. E. and Abrahams, S. (2011). Deficits in emotional and social cognition in amyotrophic lateral sclerosis. Neuropsychology, 25, 53–65.
Goldberg, Y. K., Eastwood, J. D., LaGuardia, J. and Danckert, J. (2011). Boredom: an emotional experience distinct from apathy, anhedonia, or depression. Journal of Social and Clinical Psychology, 30, 647–666.
Goldstein, L. H. and Abrahams, S. (2013). Changes in cognition and behavior in amyotrophic lateral sclerosis: nature of impairment and implications for assessment. The Lancet Neurology, 12, 368–380.
Grossman, A. B., WoolleyLevine, S., Bradley, W. G. and Miller, R. G. (2007). Detecting neurobehavioral changes in amyotrophic lateral sclerosis. Amyotrophic Lateral Sclerosis, 8, 56–61.
Hamilton, J. M.
et al. (2003). Behavioral abnormalities contribute to functional decline in Huntington's disease. Journal of Neurology, Neurosurgery and Psychiatry, 74, 120–122.
Hermans, H., van der Pas, F. H. and Evenhuis, H. M. (2011). Instruments assessing anxiety in adults with intellectual disabilities: a systematic review. Research in Developmental Disabilities, 32, 861–870.
Hsieh, C. J., Chu, H., Cheng, J. J. S., Shen, W. W. and Lin, C. C. (2012). Validation of apathy evaluation scale and assessment of severity of apathy in Alzheimer's disease. Psychiatry and Clinical Neurosciences, 66, 227–234.
et al. (2010). Apathy is a prominent neuropsychiatric feature of radiological white-matter changes in patients with dementia. International Journal of Geriatric Psychiatry, 25, 588–595.
Kaufer, D. I.
et al. (2000). Validation of the NPI-Q, a brief clinical form of the neuropsychiatric inventory. The Journal of Neuropsychiatry and Clinical Neurosciences, 12, 233–239.
Kimberlin, C. L. and Winetrstein, A. G. (2008). Validity and reliability of measurement instruments used in research. American Journal of Health-System Pharmacy, 65, 2276–2284.
Landes, A. M., Sperry, S. D. and Strauss, M. E. (2005). Prevalence of apathy, dysphoria, and depression in relation to dementia severity in Alzheimer's disease. The Journal of Neuropsychiatry and Clinical Neuroscience, 17, 342–349.
et al. (2012). A comparative validation of the abbreviated apathy evaluation scale (AES-10) with the neuropsychiatric inventory apathy subscale against diagnostic criteria of apathy. Journal of the American Medical Directors Association, 13, e301–e306.
Levy, M. L.
et al. (1998). Apathy is not depression. The Journal of Neuropsychiatry and Clinical Neurosciences, 10, 314–319.
Lieberman, A. (2006). Depression in Parkinson's disease – a review. Acta Neurologica Scandinavica, 113, 1–8.
et al. (2007). Development of a short version of the apathy evaluation scale specifically adapted for demented nursing home residents. The American Journal of Geriatric Psychiatry, 15, 376–385.
Malakouti, S. K., Panaghi, L., Foroughan, M., Salehi, M. and Zandi, T. (2012). Farsi version of the neuropsychiatric inventory: validity and reliability study among Iranian elderly with dementia. International Psychogeriatrics, 24, 223–230.
Marin, R. S. (1996). Apathy: concept, syndrome, neural mechanisms, and treatment. Seminars in Clinical Neuropsychiatry, 1, 304–314.
Marin, R. S., Biedrzycki, R. C. and Firinciogullari, S. (1991). Reliability and validity of the apathy evaluation scale. Psychiatry Research, 38, 143–162.
Mendez, M. F., Lauterbach, E. C. and Sampson, S. M. (2008). ANPA committee on research. An evidence-based review of the psychopathology of frontotemporal dementia: a report of the ANPA committee on research. The Journal of Neuropsychiatry and Clinical Neuroscience, 20, 130–149.
Mioshi, E., Kipps, C. M. and Hodges, J. R. (2009). Activities of daily living in behavioral variant frontotemporal dementia: differences in caregiver and performance-based assessments. Alzheimer Disease and Associated Disorders, 23, 70–76.
Moher, D., Liberati, A., Tetzlaff, J. and Altman, D. G. (2009). Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Annals of Internal Medicine, 151, 264–269.
Pedersen, K. F.
et al. (2012). Psychometric properties of the starkstein apathy scale in patients with early untreated Parkinson disease. The American Journal of Geriatric Psychiatry, 20, 142–148.
Pedersen, K. F., Larsen, J. P., Alves, G. and Aarsland, D. (2009). Prevalence and clinical correlates of apathy in Parkinson's disease: a community-based study. Parkinsonism and Related Disorders, 15, 295–299.
Politis, A. M., Mayer, L. S., Passa, M., Maillis, A. and Lyketsos, C. G. (2004). Validity and reliability of the newly translated hellenic neuropsychiatric inventory (H- NPI) applied to greek outpatients with Alzheimer's disease: a study of disturbing behaviors among referrals to a memory clinic. International Journal of Geriatric Psychiatry, 19, 203–208.
Quaranta, D., Marra, C., Rossi, C., Gainotti, G. and Masullo, C. (2012). Different apathy profile in behavioral variant of frontotemporal dementia and Alzheimer's disease: a preliminary investigation. Current Gerontology and Geriatrics Research, Current Gerontology and Geriatrics Research. Epublished ahead of print, doi:10.1155/2012/719250.
Robert, P. H.
et al. (2002). The apathy inventory: assessment of apathy and awareness in Alzheimer's disease, Parkinson's disease and mild cognitive impairment. International Journal of Geriatric Psychiatry, 17, 1099–1105.
et al. (2006). The lille apathy rating scale (LARS), a new instrument for detecting and quantifying apathy: validation in Parkinson's disease. Journal of Neurology, Neurosurgery and Psychiatry, 77, 579–584.
Staekenborg, S. S.
et al. (2010). Behavioral and psychological symptoms in vascular dementia; differences between small-and large-vessel disease. Journal of Neurology, Neurosurgery and Psychiatry, 81, 547–551.
Starkstein, S. E.
et al. (1992). Reliability, validity, and clinical correlates of apathy in Parkinson's disease. The Journal of Neuropsychiatry and Clinical Neuroscience, 4, 134–139.
Strauss, M. E. and Sperry, S. D. (2002). An informant-based assessment of apathy in Alzheimer disease. Cognitive and Behavioral Neurology, 15, 176–183.
Thompson, J. C.
et al. (2012). Longitudinal evaluation of neuropsychiatric symptoms in Huntington's disease. The Journal of Neuropsychiatry and Clinical Neurosciences, 24, 53–60.
van Duijn, E., Kingma, E. M. and van der Mast, R. C. (2007). Psychopathology in verified Huntington's disease gene carriers. The Journal of Neuropsychiatry and Clinical Neurosciences, 19, 441–448.
van Duijn, E., Reedeker, N., Giltay, E. J., Roos, R. A. C. and van der Mast, R. C. (2010). Correlates of apathy in Huntington's disease. The Journal of Neuropsychiatry and Clinical Neurosciences, 22, 287–294.
van Reekum, R., Stuss, D. T. and Ostrander, L. (2005). Apathy: why care?
The Journal of Neuropsychiatry and Clinical Neurosciences, 17, 7–19.
Viera, A. J. and Garrett, J. M. (2005). Understanding interobserver agreement: the kappa statistic. Family Medicine, 37, 360–363.
Whiting, P., Rutjes, A. W., Reitsma, J. B., Bossuyt, P. M. and Kleijnen, J. (2003). The development of QUADAS: a tool for the quality assessment of studies of diagnostic accuracy included in systematic reviews. BMC Medical Research Methodology, 3, 25.
et al. (2010). Frontal-lobe mediated behavioral dysfunction in amyotrophic lateral sclerosis. European Journal of Neurology, 17, 103–110.
Woolley, S. C., Zhang, Y., Schuff, N., Weiner, M. W. and Katz, J. S. (2011). Neuroanatomical correlates of apathy in ALS using 4 Tesla diffusion tensor MRI. Amyotrophic Lateral Sclerosis, 12, 52–58.
Zahodne, L. B.
et al. (2009). Examination of the lille apathy rating scale in Parkinson disease. Movement Disorders, 24, 677–683.