Dr Katya Numbers
Lecturer

Dr Katya Numbers

Bachelor of Science, Psychology (Montana State University); Masters of Science, Psychology (Montanan State University); PhD, Cognitive Science (Macquarie University).

Medicine & Health
Centre for Healthy Brain Ageing

Katya is a Postdoctoral Research Fellow and Lecturer at the Centre for Healthy Brain Ageing (CHeBA), within the Discipline of Psychiatry & Mental Health. Her work focuses on modifiable lifestyle factors associated with increased risk of dementia and identifying behavioural phenotypes of very early dementia. She focuses on how older adults' perceptions of their own cognitive and functional abilities relate to their risk of dementia. Additionally, Katya examines the connection between individuals' attitudes towards ageing and their cognitive health, as well as how depression and anxiety may influence these relationships. 
Click here to read Dr Katya Numbers' ‘Meet Our Researcher’ interview

Phone
+61 (2) 9385 0425
Location
Level 1, AGSM (G27), Gate 11, Botany Street, UNSW, Sydney, NSW, 2052, AUSTRALIA
  • Journal articles | 2024
    Chan LLY; Delbaere K; Numbers K; Lam B; Menant J; Sturnieks DL; Trollor JN; Brodie MA; Lord SR, 2024, 'Poor mobility and lower limb weakness are associated with three distinct depressive symptom trajectories over 6 years in older people', Australasian Journal on Ageing, http://dx.doi.org/10.1111/ajag.13273
    Journal articles | 2023
    Calkin CJ; Numbers K; Brodaty H; Sachdev PS; Medvedev ON, 2023, 'Measuring distress in older population: Rasch analysis of the Kessler Psychological Distress Scale', Journal of Affective Disorders, 330, pp. 117 - 124, http://dx.doi.org/10.1016/j.jad.2023.02.116
    Journal articles | 2023
    Gong J; Harris K; Lipnicki DM; Castro-Costa E; Lima-Costa MF; Diniz BS; Xiao S; Lipton RB; Katz MJ; Wang C; Preux PM; Guerchet M; Gbessemehlan A; Ritchie K; Ancelin ML; Skoog I; Najar J; Sterner TR; Scarmeas N; Yannakoulia M; Kosmidis MH; Guaita A; Rolandi E; Davin A; Gureje O; Trompet S; Gussekloo J; Riedel-Heller S; Pabst A; Röhr S; Shahar S; Singh DKA; Rivan NFM; Boxtel MV; Köhler S; Ganguli M; Chang CC; Jacobsen E; Haan M; Ding D; Zhao Q; Xiao Z; Narazaki K; Chen T; Chen S; Ng TP; Gwee X; Numbers K; Mather KA; Scazufca M; Lobo A; De-la-Cámara C; Lobo E; Sachdev PS; Brodaty H; Hackett ML; Peters SAE; Woodward M, 2023, 'Sex differences in dementia risk and risk factors: Individual-participant data analysis using 21 cohorts across six continents from the COSMIC consortium', Alzheimer's and Dementia, 19, pp. 3365 - 3378, http://dx.doi.org/10.1002/alz.12962
    Journal articles | 2023
    Hopkins EG; Leman PJ; Cervin M; Numbers K; Brodaty H; Kochan NA; Sachdev PS; Medvedev ON, 2023, 'Network of mental activities, cognitive function and depression in older men and women', Journal of Psychiatric Research, 162, pp. 113 - 122, http://dx.doi.org/10.1016/j.jpsychires.2023.05.030
    Journal articles | 2023
    Kalam S; Numbers K; Lipnicki DM; Lam BCP; Brodaty H; Reppermund S, 2023, 'The combination of olfactory dysfunction and depression increases the risk of incident dementia in older adults', International Psychogeriatrics, http://dx.doi.org/10.1017/S1041610223000480
    Journal articles | 2023
    Litkouhi PN; Numbers K; Valenzuela M; Crawford JD; Lam BCP; Litkouhi PN; Sachdev PS; Kochan NA; Brodaty H, 2023, 'Critical periods for cognitive reserve building activities for late life global cognition and cognitive decline: the Sydney memory and aging cohort study', Aging, Neuropsychology, and Cognition, http://dx.doi.org/10.1080/13825585.2023.2181941
    Journal articles | 2023
    Mahalingam G; Samtani S; Lam BCP; Lipnicki DM; Lima-Costa MF; Blay SL; Castro-Costa E; Shifu X; Guerchet M; Preux P-M; Gbessemehlan A; Skoog I; Najar J; Sterner TR; Scarmeas N; Yannakoulia M; Dardiotis T; Kim K-W; Riedel-Heller S; Röhr S; Pabst A; Shahar S; Numbers K; Ganguli M; Hughes TF; Chang C-CH; Crowe M; Ng TP; Gwee X; Chua DQL; Rymaszewska J; Wolf-Ostermann K; Welmer A-K; Stafford J; Vernooij-Dassen M; Jeon Y-H; Sachdev PS; Brodaty H, 2023, 'Social connections and risk of incident mild cognitive impairment, dementia, and mortality in 13 longitudinal cohort studies of ageing', International Psychogeriatrics, 35, pp. 16 - 17, http://dx.doi.org/10.1017/s1041610223001734
    Journal articles | 2023
    Mahalingam G; Samtani S; Lam BCP; Lipnicki DM; Lima-Costa MF; Blay SL; Castro-Costa E; Shifu X; Guerchet M; Preux PM; Gbessemehlan A; Skoog I; Najar J; Sterner TR; Scarmeas N; Yannakoulia M; Dardiotis T; Kim KW; Riedel-Heller S; Röhr S; Pabst A; Shahar S; Numbers K; Ganguli M; Hughes TF; Chang CCH; Crowe M; Ng TP; Gwee X; Chua DQL; Rymaszewska J; Wolf-Ostermann K; Welmer AK; Stafford J; Mélis R; Vernooij-Dassen M; Jeon YH; Sachdev PS; Brodaty H, 2023, 'Social connections and risk of incident mild cognitive impairment, dementia, and mortality in 13 longitudinal cohort studies of ageing', Alzheimer's and Dementia, 19, pp. 5114 - 5128, http://dx.doi.org/10.1002/alz.13072
    Journal articles | 2023
    Numbers K; Lam BCP; Crawford JD; Kochan NA; Sachdev PS; Brodaty H, 2023, 'Longitudinal changes in participant and informant reports of subjective cognitive complaints are associated with dementia risk', Frontiers in Aging Neuroscience, 15, http://dx.doi.org/10.3389/fnagi.2023.1044807
    Journal articles | 2023
    Numbers KT, 2023, 'Increased worry associated with self‐reported, but not informant‐reported, subjective cognitive decline predicts risk of incident dementia', Alzheimer's & Dementia, 19, http://dx.doi.org/10.1002/alz.075634
    Journal articles | 2023
    Reppermund S; Numbers KT; Lin P; Delbaere K; Wesson J; Clemson L; Ginige JA; Trollor JN; Draper B; Brodaty H, 2023, 'Development of an innovative computerized assessment of instrumental activities of daily living', Alzheimer's & Dementia, 19, http://dx.doi.org/10.1002/alz.071164
    Journal articles | 2023
    Samtani S; Mahalingam G; Lam BCP; Lipnicki DM; Costa E; Lima‐Costa MF; Xiao S; Scarmeas N; Kim KW; Numbers KT; Ganguli M; Krishna M; Ng TP; Sachdev PS; Brodaty H; Skoog I; Riedel‐Heller SG; Shahar S, 2023, 'Types of social support and depressive symptoms in older adults: An IPD meta‐analysis of longitudinal ageing studies', Alzheimer's & Dementia, 19, http://dx.doi.org/10.1002/alz.074525
    Journal articles | 2023
    Selwood A; Catts VS; Numbers KT; Lee T; Thalamuthu A; Wright M; Sachdev PS, 2023, 'The heritability of subjective cognitive complaints in older Australian twins', Alzheimer's & Dementia, 19, http://dx.doi.org/10.1002/alz.074561
    Journal articles | 2023
    Selwood AE; Catts VS; Numbers K; Lee T; Thalamuthu A; Wright MJ; Sachdev PS, 2023, 'The Heritability of Subjective Cognitive Complaints in Older Australian Twins', Journal of Alzheimer's Disease, 92, pp. 1015 - 1026, http://dx.doi.org/10.3233/jad-221008
    Journal articles | 2023
    Sprague BN; Zhu X; Rosso AL; Verghese J; Delbaere K; Lipnicki DM; Sachdev PS; Ng TP; Gwee X; Yap KB; Kim K-W; Han JW; Oh DJ; Narazaki K; Chen T; Chen S; Brodaty H; Numbers K; Kochan NA; Walker RW; Paddick S-M; Gureje O; Ojagbemi A; Bello T; Rosano C, 2023, 'Correlates of gait speed among older adults from six countries: Findings from the COSMIC collaboration.', The Journals of Gerontology Series A, http://dx.doi.org/10.1093/gerona/glad090
    Journal articles | 2023
    Truong QC; Cervin M; Choo CC; Numbers K; Bentvelzen AC; Kochan NA; Brodaty H; Sachdev PS; Medvedev ON, 2023, 'Examining the validity of the Mini-Mental State Examination (MMSE) and its domains using network analysis', Psychogeriatrics, http://dx.doi.org/10.1111/psyg.13069
    Journal articles | 2023
    Truong QC; Cervin M; Choo CC; Numbers K; Bentvelzen AC; Merkin AG; Sachdev PS; Feigin VL; Brodaty H; Kochan NA; Medvedev ON, 2023, 'Using network analysis to validate domains of the modified telephone interview for cognitive status', European Journal of Clinical Investigation, 53, http://dx.doi.org/10.1111/eci.14016
    Journal articles | 2023
    Truong QC; Choo C; Numbers K; Bentvelzen A; Merkin AG; Brodaty H; Kochan NA; Feigin VL; Sachdev PS; Medvedev ON, 2023, 'Enhancing Precision of the Telephone Interview for Cognitive Status–Modified (TICS-M) Using the Rasch Model', Psychological Assessment, 35, pp. 559 - 571, http://dx.doi.org/10.1037/pas0001233
    Journal articles | 2023
    Truong QC; Numbers K; Choo CC; Bentvelzen AC; Catts VS; Cervin M; Jorm AF; Kochan NA; Brodaty H; Sachdev PS; Medvedev ON, 2023, 'Establishing conversion of the 16-item Informant Questionnaire on Cognitive Decline in the Elderly scores into interval-level data across multiple samples using Rasch methodology', Psychogeriatrics, 23, pp. 411 - 421, http://dx.doi.org/10.1111/psyg.12946
    Journal articles | 2023
    Xu X; Catts V; Harris K; Wang N; Numbers K; Trollor J; Brodaty H; Rodgers A; Sachdev P; Schutte A, 2023, 'Cumulative Blood Pressure Load and Incident Dementia, Cognitive Function, and All-cause and Cardiovascular Deaths in Older Adults', Heart, Lung and Circulation, 32, pp. S385 - S386, http://dx.doi.org/10.1016/j.hlc.2023.06.509
    Journal articles | 2023
    Yan VYX; Numbers K; Sachdev PS; Brodaty H; Medvedev ON, 2023, 'Application of generalizability theory to evaluate the Kessler Psychological Distress Scale and distinguish between enduring and dynamic distress', Journal of Affective Disorders Reports, 14, http://dx.doi.org/10.1016/j.jadr.2023.100668
    Journal articles | 2022
    Chalmers RA; Cervin M; Choo C; Baune BT; Trollor JN; Numbers K; Sachdev PS; Brodaty H; Kochan NA; Medvedev ON, 2022, 'Networks of inflammation, depression, and cognition in aging males and females', Aging Clinical and Experimental Research, 34, pp. 2387 - 2398, http://dx.doi.org/10.1007/s40520-022-02198-6
    Journal articles | 2022
    Hou J; Hess JL; Armstrong N; Bis JC; Grenier-Boley B; Karlsson IK; Leonenko G; Numbers K; O’Brien EK; Shadrin A; Thalamuthu A; Yang Q; Andreassen OA; Brodaty H; Gatz M; Kochan NA; Lambert JC; Laws SM; Masters CL; Mather KA; Pedersen NL; Posthuma D; Sachdev PS; Williams J; Fan CC; Faraone SV; Fennema-Notestine C; Lin SJ; Escott-Price V; Holmans P; Seshadri S; Tsuang MT; Kremen WS; Glatt SJ, 2022, 'Polygenic resilience scores capture protective genetic effects for Alzheimer’s disease', Translational Psychiatry, 12, http://dx.doi.org/10.1038/s41398-022-02055-0
    Journal articles | 2022
    Jang S; Numbers K; Lam BCP; Sachdev PS; Brodaty H; Reppermund S, 2022, 'Performance-Based vs Informant-Reported Instrumental Activities of Daily Living in Predicting Dementia', Journal of the American Medical Directors Association, 23, pp. 1342 - 1347.e9, http://dx.doi.org/10.1016/j.jamda.2021.09.020
    Journal articles | 2022
    Kumar SS; Merkin AG; Numbers K; Sachdev PS; Brodaty H; Kochan NA; Trollor JN; Mahon S; Medvedev O, 2022, 'A Novel Approach to Investigate Depression Symptoms in the Aging Population Using Generalizability Theory', Psychological Assessment, 34, pp. 684 - 696, http://dx.doi.org/10.1037/pas0001129
    Journal articles | 2022
    Nosheny RL; Amariglio R; Sikkes SAM; Van Hulle C; Bicalho MAC; Dowling NM; Brucki SMD; Ismail Z; Kasuga K; Kuhn E; Numbers K; Aaronson A; Moretti DV; Pereiro AX; Sánchez-Benavides G; Sellek Rodríguez AF; Urwyler P; Zawaly K, 2022, 'The role of dyadic cognitive report and subjective cognitive decline in early ADRD clinical research and trials: Current knowledge, gaps, and recommendations', Alzheimer's and Dementia: Translational Research and Clinical Interventions, 8, http://dx.doi.org/10.1002/trc2.12357
    Journal articles | 2022
    Numbers K; Jang S; Brodaty H; Sachdev PS; Draper B; Reppermund S, 2022, 'Instrumental Activities of Daily Living by Subjective and Objective Measures: The Impact of Depression and Personality', Frontiers in Aging Neuroscience, 14, http://dx.doi.org/10.3389/fnagi.2022.829544
    Journal articles | 2022
    Numbers K, 2022, 'Emerging Neuropsychiatric Symptoms May Represent an Early Manifestation of Preclinical Alzheimer's Disease', Biological Psychiatry, 92, pp. e1 - e3, http://dx.doi.org/10.1016/j.biopsych.2022.04.013
    Journal articles | 2022
    Numbers KT; Lam BCP; Crawford JD; Kochan NA; Sachdev PS; Brodaty H, 2022, 'Dyadic patterns of subjective cognitive reports as predictors of incident dementia', Alzheimer's & Dementia, 18, http://dx.doi.org/10.1002/alz.061351
    Journal articles | 2022
    Page ZA; Croot K; Sachdev PS; Crawford JD; Lam BCP; Brodaty H; Miller Amberber A; Numbers K; Kochan NA, 2022, 'Comparison of Computerised and Pencil-and-Paper Neuropsychological Assessments in Older Culturally and Linguistically Diverse Australians', Journal of the International Neuropsychological Society, 28, pp. 1050 - 1063, http://dx.doi.org/10.1017/S1355617721001314
    Journal articles | 2022
    Page ZA; Croot K; Sachdev PS; Crawford JD; Lam BCP; Brodaty H; Miller Amberber A; Numbers K; Kochan NA, 2022, 'Comparison of computerised and pencil-and-paper neuropsychological assessments in older culturally and linguistically diverse Australians - CORRIGENDUM.', Journal of the International Neuropsychological Society, pp. 1 - 1, http://dx.doi.org/10.1017/s135561772200073x
    Journal articles | 2022
    Samtani S; Mahalingam G; Lam BCP; Lipnicki DM; Lima-Costa MF; Blay SL; Castro-Costa E; Shifu X; Guerchet M; Preux PM; Gbessemehlan A; Skoog I; Najar J; Rydberg Sterner T; Scarmeas N; Kim KW; Riedel-Heller S; Röhr S; Pabst A; Shahar S; Numbers K; Ganguli M; Jacobsen E; Hughes TF; Crowe M; Ng TP; Maddock J; Marseglia A; Mélis R; Szcześniak D; Wiegelmann H; Vernooij-Dassen M; Jeon YH; Sachdev PS; Brodaty H, 2022, 'Associations between social connections and cognition: a global collaborative individual participant data meta-analysis', The Lancet Healthy Longevity, 3, pp. e740 - e753, http://dx.doi.org/10.1016/S2666-7568(22)00199-4
    Journal articles | 2022
    Samtani S; Mahalingam S; Lam BCP; Lipnicki DM; Costa E; Xiao S; Guerchet M; Preux P; Skoog I; Scarmeas N; Kim KW; Riedel‐Heller SG; Hamid TA; Numbers KT; Ganguli M; Crowe MG; Ng TP; Sachdev PS; Brodaty H, 2022, 'The impact of social health on global cognition and cognitive domains: An individual participant level data meta‐analysis of longitudinal cohort studies of cognitive ageing', Alzheimer's & Dementia, 18, http://dx.doi.org/10.1002/alz.061062
    Journal articles | 2022
    Truong QC; Choo C; Numbers K; Merkin AG; Brodaty H; Kochan NA; Sachdev PS; Feigin VL; Medvedev ON, 2022, 'Applying generalizability theory to examine assessments of subjective cognitive complaints: whose reports should we rely on - participant versus informant?', International Psychogeriatrics, 34, pp. 1023 - 1033, http://dx.doi.org/10.1017/S1041610221000363
    Journal articles | 2022
    Truong QC; Choo C; Numbers K; Merkin AG; Brodaty H; Kochan NA; Sachdev PS; Feigin VL; Medvedev ON, 2022, 'Clinical investigation of dynamic and enduring aspects of global cognition in aged population', European Journal of Clinical Investigation, 52, http://dx.doi.org/10.1111/eci.13681
    Journal articles | 2021
    Chander RJ; Mather KA; Cleary R; Grainger SA; Thalamuthu A; Numbers K; Kochan NA; Armstrong NJ; Brodaty H; Henry JD; Sachdev P, 2021, 'The influence of rs53576 polymorphism in the oxytocin receptor (OXTR) gene on empathy in healthy adults by subtype and ethnicity: a systematic review and meta-analysis', Reviews in the Neurosciences, http://dx.doi.org/10.1515/revneuro-2021-0038
    Journal articles | 2021
    Lennon MJ; Lam BCP; Crawford J; Brodaty H; Kochan NA; Trollor JN; Numbers K; Draper B; Thalamuthu A; Sachdev PS, 2021, 'Does Antihypertensive Use Moderate the Effect of Blood Pressure on Cognitive Decline in Older People?', Journals of Gerontology - Series A Biological Sciences and Medical Sciences, 76, pp. 859 - 866, http://dx.doi.org/10.1093/gerona/glaa232
    Journal articles | 2021
    Numbers K; Brodaty H, 2021, 'The effects of the COVID-19 pandemic on people with dementia', Nature Reviews Neurology, 17, pp. 69 - 70, http://dx.doi.org/10.1038/s41582-020-00450-z
    Journal articles | 2021
    Numbers K; Lam BCP; Crawford JD; Kochan NA; Sachdev PS; Brodaty H, 2021, 'Increased reporting of subjective cognitive complaints over time predicts cognitive decline and incident dementia', International Journal of Geriatric Psychiatry, 36, pp. 1739 - 1747, http://dx.doi.org/10.1002/gps.5594
    Journal articles | 2021
    Stevens A; Numbers K; Samtani S, 2021, 'Are lonely older adults more vulnerable to mental health issues during pandemics?', International Psychogeriatrics, 33, pp. 449 - 451, http://dx.doi.org/10.1017/S104161022100034X
    Journal articles | 2021
    Truong QC; Choo C; Numbers K; Merkin AG; Sachdev PS; Feigin VL; Brodaty H; Kochan NA; Medvedev ON, 2021, 'Enhancing precision of the 16-item Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE-16) using Rasch methodology', International Psychogeriatrics, http://dx.doi.org/10.1017/S1041610221002568
    Journal articles | 2020
    Chander RJ; Grainger SA; Crawford JD; Mather KA; Numbers K; Cleary R; Kochan NA; Brodaty H; Henry JD; Sachdev PS, 2020, 'Development of a short-form version of the Reading the Mind in the Eyes Test for assessing theory of mind in older adults', International Journal of Geriatric Psychiatry, 35, pp. 1322 - 1330, http://dx.doi.org/10.1002/gps.5369
    Journal articles | 2020
    Chander RJ; Numbers KT; Grainger SA; Cleary R; Das D; Mather KA; Kochan NA; Brodaty H; Henry JD; Sachdev PS, 2020, 'Social cognitive abilities in older adults with mild cognitive impairment and dementia', Alzheimer's & Dementia, 16, http://dx.doi.org/10.1002/alz.044231
    Journal articles | 2020
    Lam BCP; Crawford JD; Lipnicki DM; Numbers KT; Kochan NA; Draper B; Trollor JN; Brodaty H; Sachdev PS, 2020, 'The latent construct of dementia phenotype: Validation and longitudinal examination in the Sydney Memory and Ageing Study', Alzheimer's & Dementia, 16, http://dx.doi.org/10.1002/alz.040876
    Journal articles | 2020
    Numbers K; Crawford JD; Kochan NA; Draper B; Sachdev PS; Brodaty H, 2020, 'Participant and informant memory-specific cognitive complaints predict future decline and incident dementia: Findings from the Sydney Memory and Ageing Study', PLOS ONE, 15, pp. e0232961 - e0232961, http://dx.doi.org/10.1371/journal.pone.0232961
    Journal articles | 2020
    Numbers KT; Lam BCP; Crawford JD; Kochan NA; Sachdev PS; Brodaty H, 2020, 'Patterns of change in subjective cognitive complaints are associated with cognitive decline and dementia risk: Findings from the Sydney Memory and Ageing Study', Alzheimer's & Dementia, 16, http://dx.doi.org/10.1002/alz.040685
    Journal articles | 2019
    Bentvelzen AC; Crawford JD; Theobald A; Maston K; Slavin MJ; Reppermund S; Kang K; Numbers K; Brodaty H; Sachdev P; Kochan NA, 2019, 'Validation and Normative Data for the Modified Telephone Interview for Cognitive Status: The Sydney Memory and Ageing Study', Journal of the American Geriatrics Society, 67, pp. 2108 - 2115, http://dx.doi.org/10.1111/jgs.16033
    Journal articles | 2019
    Lipnicki DM; Makkar SR; Crawford JD; Thalamuthu A; Kochan NA; Lima-Costa MF; Castro-Costa E; Ferri CP; Brayne C; Stephan B; Llibre-Rodriguez JJ; Llibre-Guerra JJ; Valhuerdi-Cepero AJ; Lipton RB; Katz MJ; Derby CA; Ritchie K; Ancelin M-L; Carrière I; Scarmeas N; Yannakoulia M; Hadjigeorgiou GM; Lam L; Chan W-C; Fung A; Guaita A; Vaccaro R; Davin A; Kim KW; Han JW; Suh SW; Riedel-Heller SG; Roehr S; Pabst A; van Boxtel M; Köhler S; Deckers K; Ganguli M; Jacobsen EP; Hughes TF; Anstey KJ; Cherbuin N; Haan MN; Aiello AE; Dang K; Kumagai S; Chen T; Narazaki K; Ng TP; Gao Q; Nyunt MSZ; Scazufca M; Brodaty H; Numbers K; Trollor JN; Meguro K; Yamaguchi S; Ishii H; Lobo A; Lopez-Anton R; Santabárbara J; Leung Y; Lo JW; Popovic G; Sachdev PS, 2019, 'Determinants of cognitive performance and decline in 20 diverse ethno-regional groups: A COSMIC collaboration cohort study', PLOS Medicine, 16, pp. e1002853 - e1002853, http://dx.doi.org/10.1371/journal.pmed.1002853
    Journal articles | 2019
    Numbers KT; Barnier AJ; Harris CB; Meade ML, 2019, 'Ageing stereotypes influence the transmission of false memories in the social contagion paradigm', Memory, 27, pp. 368 - 378, http://dx.doi.org/10.1080/09658211.2018.1511809
    Journal articles | 2014
    Numbers KT; Meade ML; Perga VA, 2014, 'The influences of partner accuracy and partner memory ability on social false memories', Memory and Cognition, 42, pp. 1225 - 1238, http://dx.doi.org/10.3758/s13421-014-0443-9
  • Conference Abstracts | 2023
    Selwood AE; Catts VS; Numbers K; Lee T; Thalamuthu A; Wright MJ; Sachdev PS, 2023, 'The Heritability of Subjective Cognitive Complaints in Older Australian Twins', in Journal of Alzheimer's Disease, Vol. 92, pp. 1015 - 1026, http://dx.doi.org/10.3233/JAD-221008
    Conference Abstracts | 2023
    Xu X; Catts V; Harris K; Wang N; Numbers K; Trollor J; Brodaty H; Rodger A; Sachdev P; Schutte A, 2023, 'CUMULATIVE BLOOD PRESSURE LOAD AND INCIDENT DEMENTIA, COGNITIVE FUNCTION, AND ALL-CAUSE AND CARDIOVASCULAR DEATHS IN ADULTS AGED 70 YEARS AND OLDER', in Journal of Hypertension, Ovid Technologies (Wolters Kluwer Health), Vol. 41, pp. e26 - e27, http://dx.doi.org/10.1097/01.hjh.0000939124.41534.98
    Preprints | 2022
    Hou J; Hess J; Armstrong N; Bis J; Grenier-Boley B; Karlsson I; Leonenko G; Numbers K; O’Brien E; Shadrin A; Thalamuthu A; Yang Q; Andreassen O; Brodaty H; Gatz M; Kochan N; Lambert J-C; Laws S; Masters C; Mather K; Pedersen N; Posthuma D; Sachdev P; Williams J; Fan CC; Faraone S; Fennema-Notestine C; Lin S-J; Escott-Price V; Holmans P; Seshadri S; Tsuang M; Kremen W; Glatt S; the Alzheimer’s Disease Neuroimaging Initiative , 2022, Polygenic resilience scores capture protective genetic effects for Alzheimer’s disease, , http://dx.doi.org/10.1101/2022.05.10.22274858
    Conference Papers | 2021
    Samtani S; Stevens A; Lipnicki DM; Costa EC; Guerchet M; Preux P-M; Skoog I; Scarmeas N; Kim K-W; Ganguli M; Crowe M; Ng TP; Numbers K; Sachdev PS; Brodaty H, 2021, 'Social Health And Reserve in the Dementia patient journey (SHARED): Females, older adults, and people living with dementia are vulnerable to social isolation', in INTERNATIONAL PSYCHOGERIATRICS, CAMBRIDGE UNIV PRESS, pp. 20 - 21, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000721315200025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1
    Conference Abstracts | 2019
    Lipnicki DM; Trollor JN; Kochan NA; Numbers K; Kang K; Crawford JD; Brodaty H; Sachdev PS, 2019, 'Failure to identify particular odours predicts future dementia and mortality [Abstract O1-02-04]', in Alzheimer's & Dementia, Elsevier BV, Los Angeles, CA, USA, Vol. 15, pp. P195 - P196, presented at Alzheimer's Association International Conference (AAIC) 2019, Los Angeles, CA, USA, 14 July 2019 - 16 July 2019, http://dx.doi.org/10.1016/j.jalz.2019.06.4526

Katya is Chief Investigator on nine successful grants totalling $6,917,922 including two successful NHMRC Medical Research Future Fund (MRFF) grants and an NHMRC Clinical Trials and Cohort Studies (CTCS) grant. 

  • Arc PGC Research Supervisor of the Year Award | Faculty of Medicine & Health | 2022
  • “Hero’s Award” as member of the Elevate Team | Faculty of Medicine and Health | 2022
  • Centre for Health Brain Ageing (CHeBA) Publication of the Year Award - Early Career Researcher - 2021

1. Dementia prevention is the primary focus of my research and a national health care priority in Australia. Although dementia is the second leading cause of death in older Australians, it is estimated that 40% of all dementia cases are preventable through the modification of lifestyle risk factors such as social isolation, diet, and exercise. This is where my research comes in. Specifically, I investigate the mediating role of depression and anxiety on risk factors associated with dementia. Previously it was assumed that the presence of increased neuropsychiatric symptoms in people with dementia was a result of the disease (e.g., increasing loss of autonomy), but is now accepted psychiatric symptoms can play a causative role in the development of pathology.

2 I am interested in the intersection between older adults’ subjective experiences of cognitive decline and functional ability and their risk of future cognitive decline. My more recent research in this area models longitudinal trends in subjective cognitive complaints (SCCs) for both participants and informants and examines the relationship between change in SCC and incident dementia using latent growth curve analyses. Additionally, I have been exploring the heritability of SCCs in large twin datasets. Furthermore, I am investigating if combining reports of memory concerns with signs of neuropsychiatric symptoms offers better predictions of dementia risk.

3. Finally, I am very actively involved in research and groups that aim to challenge negative stereotypes about ageing and dementia. A compelling body of data has emerged showing negative attitudes towards ageing pose a significant risk to physical health and psychological well-being in later life.  Not only do negative ageing attitudes predict worse health outcomes in older adults, but ageism promotes other forms of discrimination including social exclusion from important roles and relationships, which further fosters feelings of isolation and loneliness. This is important because increased isolation and loneliness are related to depression and anxiety, which in turn can result in cortisol related brain pathology

My Research Supervision

ILP and Honours students & PhD students

My Teaching

I am a current supervisor to 3 Honours students and have previously supervised 10 Honours students (9=HD; 1=D). The majority of my students have, or will, submit first author publications in high-impact journals.

In 2022, I was awarded the Supervisor of the Year Award for the Faculty of Medicine & Health at UNSW. 

I am also an invited Lecturer and Tutor for Beginnings, Growth and Development B and Personality for the Faculty.

I tutored throughout my PhD at Macquarie University in the Department of Cognitive Science.

Before moving to Australia, I was an Adjunct Professor in the Department of Psychology at Montana State University for four semesters where I developed and taught Social Psychology, History and Systems of Psychology, and Judgment and Decision Making in Psychology; I also taught an Introduction to General Studies course for these four semesters.