Professor Liana Machado Research Interests, Research, Department of Psychology

Email liana.machado@otago.ac.nz
Tel 64 3 479 7622
Visit Professor Machado's profile

Cognitive Psychology and Neuropsychology

My laboratory researches the mechanisms and machinery underlying healthy brain functions and the cognitive deficits that emerge as a result of brain disease and advanced aging.

Understanding Brain Function and Dysfunction

To this end, we study patients suffering from neurological conditions (such as stroke and Parkinson's disease), as well as neurologically healthy young and aging adults. We then combine the knowledge gained from each of these groups so that we can advance the current understanding of brain function and brain dysfunction.

Visual Orienting

My main interest is in visual orienting, including attention and eye movements, with a particular focus on how more advanced brain structures orchestrate the activities of more primitive brain structures in order to generate strategic behaviours.

Publications

Machado, L., Berryman, A., & Perry, C. (2026). Cognition, mood, and brain hemodynamics after interval stair climbing: A randomized controlled crossover trial in university students. Journal of Cognitive Enhancement, 10(2), 126-139. doi: 10.1007/s41465-026-00361-9 Journal - Research Article

Berryman, A., & Machado, L. (2026). Cognitive and electrophysiological biomarkers of endometriosis with versus without chronic pelvic pain. Neuropsychology. Advance online publication. doi: 10.1037/neu0001069 Journal - Research Article

Ramos, A. A., Machado, L., Godoy, C., Teixeira, L. M., Lima-Costa, M. F., Cominetti, M. R., & Ferri, C. P. (2026). Cognition in later life: The role of structural support and life satisfaction in the Brazilian Longitudinal Study of Aging (ELSI-Brazil). Neuropsychology. Advance online publication. doi: 10.1037/neu0001066 Journal - Research Article

Ramos, A. A., Boaventura, V., Nascimento, A. A., Leite, L. L. R., & Machado, L. (2026). Intellectual achievement and cognitive functioning in children and adolescents with ADHD-affected siblings: A systematic literature review and meta-analysis. Clinical Pyschology Review, 123, 102688. doi: 10.1016/j.cpr.2025.102688 Journal - Research Article

Machado, L. (2025, September). Cognition in health and disease. University of Otago, Dunedin, New Zealand. [Inaugural Professorial Lecture]. Other Research Output

2026

Journal - Research Article

2025

Journal - Research Article

McNeill, R., Marshall, R., Fernando, S. A., Harrison, O., & Machado, L. (2025). COVID-19 may enduringly impact cognitive performance and brain haemodynamics in undergraduate students. Brain, Behavior & Immunity, 125, 58-67. doi: 10.1016/j.bbi.2024.12.002

Nasrollahi, N., Jowett, T., & Machado, L. (2025). Effects of wearing a surgical face mask on cognitive functioning and mood states: A randomised controlled trial in young adults. Cognitive Processing, 26, 189-199. doi: 10.1007/s10339-024-01238-5

Ramos, A. A., Bertola, L., Figueiredo da Mata, F. A., Barbosa, M. G., Boaventura, V., Machado, L., … Ferri, C. P. (2025). Socioeconomic determinants of cognition among older adults in the Brazilian longitudinal study of aging (ELSI-Brazil): A life-course approach. Social Psychiatry & Psychiatric Epidemiology, 60, 1053-1062. doi: 10.1007/s00127-024-02734-x

Ramos, A. A., & Machado, L. (2025). 3-Year test-retest reliability in Parkinson's disease and healthy older adults: The Parkinson's progression markers initiative study. Applied Neuropsychology: Adult, 32(6), 1678-1690. doi: 10.1080/23279095.2024.2303718

Journal - Research Other

Berryman, A., & Machado, L. (2025). Cognitive functioning in females with endometriosis-associated chronic pelvic pain: A literature review. Archives of Clinical Neuropsychology, 40, 1066-1080. doi: 10.1093/arclin/acaf003

Other Research Output

Machado, L. (2025, September). Cognition in health and disease. University of Otago, Dunedin, New Zealand. [Inaugural Professorial Lecture].

2024

Journal - Research Article

Stenling, A., Quensell, J., Kaur, N., & Machado, L. (2024). Stair climbing improves cognitive switching performance and mood in healthy young adults: A randomized controlled crossover trial. Journal of Cognitive Enhancement, 8, 191-205. doi: 10.1007/s41465-024-00294-1

Alexander, M., & Machado, L. (2024). Chronic exercise and neuropsychological function in healthy young adults: A randomised controlled trial investigating a running intervention. Cognitive Processing, 25, 241-258. doi: 10.1007/s10339-024-01177-1

Kouwenhoven, M., & Machado, L. (2024). Age differences in inhibitory and working memory functioning: Limited evidence of system interactions. Aging, Neuropsychology & Cognition, 31(3), 524-555. doi: 10.1080/13825585.2023.2214348

Ramos, A. A., Garvey, A., Cutfield, N. J., & Machado, L. (2024). Forward and backward spatial recall in Parkinson's disease and matched controls: A 1-year follow-up study. Applied Neuropsychology: Adult, 31(4), 647-656. doi: 10.1080/23279095.2022.2059372

Conference Contribution - Published proceedings: Abstract

Machado, L. (2024). Stair climbing improves cognition and affect in adults: Evidence from randomized controlled trials. International Journal of Psychology, 59(S1), (pp. 120). doi: 10.1002/ijop.13169

2023

Journal - Research Article

Wong, Y.-S., Pat, N., & Machado, L. (2023). Commonalities between mind wandering and task-set switching: An event-related potential study. Neuropsychologia, 185, 108585. doi: 10.1016/j.neuropsychologia.2023.108585

Ramos, A. A., Galiano-Castillo, N., & Machado, L. (2023). Cognitive functioning of unaffected first-degree relatives of individuals with late-onset Alzheimer's disease: A systematic literature review and meta-analysis. Neuropsychology Review, 33, 659-674. doi: 10.1007/s11065-022-09555-2

Journal - Research Other

Wong, Y.-S., Willoughby, A. R., & Machado, L. (2023). Reconceptualizing mind wandering from a switching perspective. Psychological Research, 87, 357-372. doi: 10.1007/s00426-022-01676-w

Conference Contribution - Published proceedings: Abstract

Berryman, A., & Machado, L. (2023). Cognition and electrophysiological biomarkers of chronic pelvic pain in women with endometriosis. Proceedings of the Graduate Research Student Symposium. (pp. 8). Retrieved from https://www.otago.ac.nz/graduate-research

Berryman, A., & Machado, L. (2023). Cognition and electrophysiological biomarkers of chronic pelvic pain in women with endometriosis. Proceedings of the Psycolloquy Symposium. (pp. 22). Dunedin, New Zealand: Department of Psychology, University of Otago. Retrieved from https://www.otago.ac.nz/psychology/research/otago059081.html

McNeill, R., & Machado, L. (2023). COVID-19 may adversely impact brain haemodynamics and exercise-cognition relationships in undergraduate students without compromising cognitive performance. Proceedings of the Psycolloquy Symposium. (pp. 20). Dunedin, New Zealand: Department of Psychology, University of Otago. Retrieved from https://www.otago.ac.nz/psychology/research/otago059081.html

2022

Journal - Research Article

Wong, Y.-S., Willoughby, A. R., & Machado, L. (2022). Spontaneous mind-wandering tendencies linked to cognitive flexibility in young adults. Consciousness & Cognition, 102, 103335. doi: 10.1016/j.concog.2022.103335

Nasrollahi, N., Jowett, T., & Machado, L. (2022). Emotional information processing in young and older adults: Meta-analysis reveals faces elicit distinct biases. European Journal of Ageing, 19, 369-379. doi: 10.1007/s10433-021-00676-w

Stenling, A., Sörman, D. E., Lindwall, M., & Machado, L. (2022). Bidirectional within- and between-person relations between physical activity and cognitive function. Journals of Gerontology Series B, 77(4), 704-709. doi: 10.1093/geronb/gbab234

White, N., Kouwenhoven, M., & Machado, L. (2022). Short-term retest performance in young versus older adults: Consideration of integrated speed-accuracy measures. Experimental Aging Research, 48(1), 68-85. doi: 10.1080/0361073x.2021.1919475

Conference Contribution - Verbal presentation and other Conference outputs

Machado, L. (2022, February). Cognitive functioning as we age: Improving the trajectory. Verbal presentation at the Collaboration of Ageing Research Excellence (CARE) Research Symposium, [Online].

2021

Journal - Research Article

Nasrollahi, N., Quensell, J., & Machado, L. (2021). Effects of a brief stair-climbing intervention on cognitive functioning and mood states in older adults: A randomized controlled trial. Journal of Aging & Physical Activity, 30(3), 455-465. doi: 10.1123/japa.2021-0125

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., Walker, R. J., & Cotter, J. D. (2021). Indomethacin markedly blunts cerebral perfusion and reactivity, with little cognitive consequence in healthy young and older adults. Journal of Physiology, 599(4), 1097-1113. doi: 10.1113/jp280118

Stenling, A., Sörman, D. E., Lindwall, M., Hansson, P., Ljungberg, J., & Machado, L. (2021). Physical activity and cognitive function: Between-person and within-person associations and moderators. Aging, Neuropsychology & Cognition, 28(3), 392-417. doi: 10.1080/13825585.2020.1779646

Guiney, H., Keall, M., & Machado, L. (2021). Volunteering in older adulthood is associated with activity engagement and cognitive functioning. Aging, Neuropsychology & Cognition, 28(2), 253-269. doi: 10.1080/13825585.2020.1743230

Journal - Research Other

Ramos, A. A., & Machado, L. (2021). A comprehensive meta-analysis on short-term and working memory dysfunction in Parkinson's Disease. Neuropsychology Review, 31, 288-311. doi: 10.1007/s11065-021-09480-w

Machado, L. (2021). Understanding cognition and how it changes with aging, brain disease, and lifestyle choices. Journal of the Royal Society of New Zealand, 51(1), 128-142. doi: 10.1080/03036758.2020.1796102

Conference Contribution - Published proceedings: Abstract

Nasrollahi, N., & Machado, L. (2021). Effects of wearing face masks on cognitive functioning and mood states: A randomised controlled trial in young adults. New Zealand Medical Journal, 134(1547), (pp. 137). Retrieved from https://www.nzma.org.nz/journal

Wong, Y.-S., Willoughby, A., & Machado, L. (2021). Exploring the role of cognitive flexibility in mind wandering. Proceedings of the University of Otago Student Research Symposium: Te Wānaka Rakahau: Ākoka. (pp. 64). [Abstract]

Cotter, J. D., Gibbons, T. D., Thomas, K. N., Wilson, L. C., & Machado, L. (2021). Potential and pitfalls with exercise and environmental stress for brain health. New Zealand Medical Journal, 134(1539), (pp. 90). Retrieved from https://www.nzma.org.nz/journal

2020

Journal - Research Article

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., & Cotter, J. D. (2020). Acute exercise-related cognitive effects are not attributable to changes in end-tidal CO₂ or cerebral blood velocity. European Journal of Applied Physiology, 120, 1637-1649. doi: 10.1007/s00421-020-04393-7

White, N., Naldoza-Drake, P., Black, K., Scullion, L., & Machado, L. (2020). Can improving the nutritional content of bread enhance cognition? Cognitive outcomes from a randomized controlled trial. Journal of Cognitive Enhancement, 4, 167-178. doi: 10.1007/s41465-019-00149-0

Journal - Research Other

Ramos, A. A., Hamdan, A. C., & Machado, L. (2020). A meta-analysis on verbal working memory in children and adolescents with ADHD. Clinical Neuropsychologist, 34(5), 873-898. doi: 10.1080/13854046.2019.1604998

Conference Contribution - Published proceedings: Abstract

Wong, Y.-S., Willoughby, A. R., & Machado, L. (2020). Investigation of mind wandering and its relationship with task switching. Proceedings of the Psycolloquy Symposium. (pp. 20). Dunedin, New Zealand: Department of Psychology, University of Otago. Retrieved from https://www.otago.ac.nz/psychology/research/otago059081.html

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., Walker, R. J., & Cotter, J. D. (2020). Effect of cerebral blood flow on cognition across healthy adulthood. FASEB Journal, 34(Suppl. 1). doi: 10.1096/fasebj.2020.34.s1.06931

Other Research Output

Machado, L. (2020, March). Healthy and ageing brains. Neurological Foundation of New Zealand Brain Awareness Month Otago Brain Day, Dunedin, New Zealand. [Public Seminar].

2019

Journal - Research Article

Stenling, A., Moylan, A., Fulton, E., & Machado, L. (2019). Effects of a brief stair-climbing intervention on cognitive performance and mood states in healthy young adults. Frontiers in Psychology, 10, 2300. doi: 10.3389/fpsyg.2019.02300

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., Thomas, K. N., & Cotter, J. D. (2019). Swimming-related effects on cerebrovascular and cognitive function. Physiological Reports, 7(20), e14247. doi: 10.14814/phy2.14247

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., & Cotter, J. D. (2019). Cerebrovascular regulation is not blunted during mental stress. Experimental Physiology, 104, 1678-1687. doi: 10.1113/ep087832

Machado, L., & Devine, A. (2019). Endogenous modulation of compatibility effects: An investigation into the temporal dynamics. Visual Cognition, 27(2), 120-126. doi: 10.1080/13506285.2019.1611684

Guiney, H., Lucas, S. J. E., Cotter, J. D., & Machado, L. (2019). Investigating links between habitual physical activity, cerebrovascular function, and cognitive control in healthy older adults. Neuropsychologia, 125, 62-69. doi: 10.1016/j.neuropsychologia.2019.01.011

White, N., Flannery, L., McClintock, A., & Machado, L. (2019). Repeated computerized cognitive testing: Performance shifts and test–retest reliability in healthy older adults. Journal of Clinical & Experimental Neuropsychology, 41(2), 179-191. doi: 10.1080/13803395.2018.1526888

Machado, L., Thompson, L. M., & Brett, C. H. R. (2019). Visual analogue mood scale scores in healthy young versus older adults. International Psychogeriatrics, 31(3), 417-424. doi: 10.1017/S1041610218000996

Conference Contribution - Published proceedings: Abstract

Nasrollahi, N., & Machado, L. (2019). Age differences in the processing of emotional information: A meta-analysis investigating face versus non-face pictures as potential moderators. Proceedings of the 39th Australasian Neuroscience Society (ANS) Annual Scientific Meeting. 11928. Retrieved from https://www.ans.org.au

Conference Contribution - Poster Presentation (not in published proceedings)

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., Walker, R. J., & Cotter, J. D. (2019, September). Effect of cerebral blood flow on cognition across healthy adulthood. Poster session presented at the Medical Sciences Congress (MedSci), Queenstown, New Zealand.

2018

Journal - Research Article

Chen, P. L., Stenling, A., & Machado, L. (2018). Evidence transcranial direct current stimulation can improve saccadic eye movement control in older adults. Vision, 2(4), 42. doi: 10.3390/vision2040042

Flannery, S. L., Jowett, T., Garvey, A., Cutfield, N. J., & Machado, L. (2018). Computerized testing in Parkinson's disease: Performance deficits in relation to standard clinical measures. Journal of Clinical & Experimental Neuropsychology, 40(10), 1062-1073. doi: 10.1080/13803395.2018.1485880

White, N., Forsyth, B., Lee, A., & Machado, L. (2018). Repeated computerized cognitive testing: Performance shifts and test–retest reliability in healthy young adults. Psychological Assessment, 30(4), 539-549. doi: 10.1037/pas0000503

Guiney, H., & Machado, L. (2018). Volunteering in the community: Potential benefits for cognitive aging. Journals of Gerontology Series B, 73(3), 399-408. doi: 10.1093/geronb/gbx134

Guiney, H., Keall, M., & Machado, L. (2018). Physical activity prevalence and correlates among New Zealand older adults. Journal of Aging & Physical Activity, 26(1), 75-83. doi: 10.1123/japa.2016-0393

Journal - Research Other

Hurley, R., & Machado, L. (2018). Using transcranial direct current stimulation to improve verbal working memory: A detailed review of the methodology. Journal of Clinical & Experimental Neuropsychology, 40(8), 790-804. doi: 10.1080/13803395.2018.1434133

Conference Contribution - Published proceedings: Abstract

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., & Cotter, J. D. (2018). Is cognition related to arterial CO2 and cerebral blood flow reactivity to exercise? Journal of Sport & Exercise Science, 2(1), (pp. 35). doi: 10.36905/jses.2018.01.01

Shoemaker, L. N., Wilson, L. C., Lucas, S. J. E., Machado, L., & Cotter, J. D. (2018). Delineation of swimming-related effects on cerebral blood flow velocity. Journal of Sport & Exercise Science, 2(1), (pp. 22). doi: 10.36905/jses.2018.01.01

2017

Journal - Research Article

Brett, C. H. R., & Machado, L. (2017). Manual versus saccadic assessment of cognitive inhibition and switching in young and older adults. Psychological Assessment, 29(11), 1420-1425. doi: 10.1037/pas0000453

Chen, P. L., & Machado, L. (2017). Developing clinically practical transcranial direct current stimulation protocols to improve saccadic eye movement control. Journal of Eye Movement Research, 10(3), 5. doi: 10.16910/jemr.10.3.5

Morton, S. E., O'Hare, K. J. M., Maha, J. L. K., Nicolson, M. P., Machado, L., Topless, R., Merriman, T. R., & Linscott, R. J. (2017). Testing the validity of taxonic schizotypy using genetic and environmental risk variables. Schizophrenia Bulletin, 43(3), 633-643. doi: 10.1093/schbul/sbw108

Bierre, K. L., Lucas, S. J. E., Guiney, H., Cotter, J. D., & Machado, L. (2017). Cognitive difficulty intensifies age-related changes in anterior frontal hemodynamics: Novel evidence from near-infrared spectroscopy. Journals of Gerontology Series A, 72(2), 181-188. doi: 10.1093/gerona/glw061

Journal - Research Other

Hurley, R., & Machado, L. (2017). Using tDCS priming to improve brain function: Can metaplasticity provide the key to boosting outcomes? Neuroscience & Biobehavioral Reviews, 83, 155-159. doi: 10.1016/j.neubiorev.2017.09.029

2016

Journal - Research Article

Forsyth, B., Machado, L., Jowett, T., Jakobi, H., Garbe, K., Winter, H., & Glue, P. (2016). Effects of low dose ibogaine on subjective mood state and psychological performance. Journal of Ethnopharmacology, 189, 10-13. doi: 10.1016/j.jep.2016.05.022

Chen, P. L., & Machado, L. (2016). Age-related deficits in voluntary control over saccadic eye movements: Consideration of electrical brain stimulation as a therapeutic strategy. Neurobiology of Aging, 41, 53-63. doi: 10.1016/j.neurobiolaging.2016.02.010

2015

Journal - Research Article

Guiney, H., Lucas, S. J., Cotter, J. D., & Machado, L. (2015). Evidence cerebral blood-flow regulation mediates exercise-cognition links in healthy young adults. Neuropsychology, 29(1), 1-9. doi: 10.1037/neu0000124

Cameron, T. A., Lucas, S. J. E., & Machado, L. (2015). Near-infrared spectroscopy reveals link between chronic physical activity and anterior frontal oxygenated hemoglobin in healthy young women. Psychophysiology, 52(5), 609-617. doi: 10.1111/psyp.12394

Conference Contribution - Published proceedings: Abstract

Chen, P. L., & Machado, L. (2015). Voluntary eye movement control deficits in aging brains: Consideration of neuromodulation as an effective therapeutic strategy. Proceedings of the Psycolloquy Seminar. (pp. 10). Dunedin, New Zealand: Department of Psychology, University of Otago. Retrieved from http://www.otago.ac.nz/psychology/research/otago059081.html

Conference Contribution - Verbal presentation and other Conference outputs

Machado, L. (2015, June). Exercise-cognition links in young adults: Optimizing brain health and function through simple non-invasive methods. Verbal presentation at the 9th Annual Brain Health Research Centre Conference: Science for a Healthy Brain, Dunedin, New Zealand.

2013

Journal - Research Article

Wyatt, N., & Machado, L. (2013). Evidence inhibition responds reactively to the salience of distracting information during focused attention. PLoS ONE, 8(4), e62809. doi: 10.1371/journal.pone.0062809

Bos, H., & Machado, L. (2013). Aging delays strategic modulation of the fixation reflex. Psychology & Aging, 28(3), 796-801. doi: 10.1037/a0032015

Wyatt, N., & Machado, L. (2013). Distractor inhibition: Principles of operation during selective attention. Journal of Experimental Psychology: Human Perception & Performance, 39(1), 245-256. doi: 10.1037/a0027922

Guiney, H., & Machado, L. (2013). Benefits of regular aerobic exercise for executive functioning in healthy populations. Psychonomic Science, 20(1), 73-86. doi: 10.3758/s13423-012-0345-4

Machado, L., Guiney, H., & Struthers, P. (2013). Identity-based inhibitory processing during focused attention. Quarterly Journal of Experimental Psychology, 66(1), 138-159. doi: 10.1080/17470218.2012.701651

Conference Contribution - Published proceedings: Abstract

Machado, L., Guiney, H., Lucas, S., & Cotter, J. (2013). Exercise frequency predicts better inhibitory control and brain blood flow regulation in healthy young adults. Journal of Cognitive Neuroscience, (Suppl.), (pp. 159). [Abstract]

2011

Journal - Research Article

Machado, L., Guiney, H., & Mitchell, A. (2011). Famous faces demand attention due to reduced inhibitory processing. PLoS ONE, 6(5), e20544. doi: 10.1371/journal.pone.0020544

Murray, J. E., Machado, L., & Knight, B. (2011). Race and gender of faces can be ignored. Psychological Research, 75(4), 324-333. doi: 10.1007/s00426-010-0310-7

Conference Contribution - Published proceedings: Abstract

Machado, L., Wyatt, N., & Guiney, H. (2011). Inhibitory control and working memory in young and elderly adults. Cognitive Neuroscience Society Annual Meeting Program (A supplement of the Journal of Cognitive Neuroscience). (pp. 141). Davis, CA: CNS. [Abstract]

Conference Contribution - Verbal presentation and other Conference outputs

Machado, L. (2011, July). Controlling visual orienting: Age-related deficits and potential remedies. Verbal presentation at the Brain Health Research Centre Conference, Dunedin, New Zealand.

Other Research Output

Machado, L. (2011, March). Maintaining control over visual orienting: Age-related changes and potential remedies. Brain Day Dunedin, University of Otago, New Zealand. [Public Seminar].

2010

Conference Contribution - Published proceedings: Abstract

Machado, L., Wyatt, N., & Guiney, H. (2010). Inhibitory processes and working memory in aging brains. Proceedings of the 7th (FENS) Forum of European Neuroscience. 5, 145.14. Retrieved from http://fens2010.neurosciences.asso.fr/

2009

Journal - Research Article

van Koningsbruggen, M. G., Pender, T., Machado, L., & Rafal, R. D. (2009). Impaired control of the oculomotor reflexes in Parkinson's disease. Neuropsychologia, 47(13), 2909-2915. doi: 10.1016/j.neuropsychologia.2009.06.018

Machado, L., Devine, A., & Wyatt, N. (2009). Distractibility with advancing age and Parkinson's disease. Neuropsychologia, 47(7), 1756-1764. doi: 10.1016/j.neuropsychologia.2009.02.018

Conference Contribution - Published proceedings: Abstract

Machado, L., Devine, A., & Wyatt, N. (2009). Distractibility with advancing age and Parkinson's disease: Evidence of dysfunctional reactive inhibition. Cognitive Neuroscience Society Annual Meeting Program (A supplement to the Journal of Cognitive Neuroscience). (pp. 45). Davis, CA: CNS. [Abstract]

2008

Journal - Research Article

Arend, I., Machado, L., Ward, R., McGrath, M., Ro, T., & Rafal, R. D. (2008). The role of the human pulvinar in visual attention and action: Evidence from temporal-order judgement, saccade decision, and antisaccade tasks. Progress in Brain Research, 171, 475-483. doi: 10.1016/S0079-6123(08)00669-9

Conference Contribution - Published proceedings: Abstract

Machado, L., Arend, I., McGrath, M., Ro, T., Ward, R., & Rafal, R. (2008). The role of the human pulvinar in visual attention and action: Evidence from temporal order judgments, saccade decision and anti-saccade tasks. Cognitive Neuroscience Society Annual Meeting Program (A supplement of the Journal of Cognitive Neuroscience). (pp. 61). Davis, CA: CNS. [Abstract]

2007

Journal - Research Article

Machado, L., Wyatt, N., Devine, A., & Knight, B. (2007). Action planning in the presence of distracting stimuli: An investigation into the time course of distractor effects. Journal of Experimental Psychology: Human Perception & Performance, 33(5), 1045-1061.

Conference Contribution - Published proceedings: Abstract

Machado, L., Devine, A., & Wyatt, N. (2007). Distractibility in the aging and parkinsonian brain. Cognitive Neuroscience Society Annual Meeting Program (A supplement of the Journal of Cognitive Neuroscience). (pp. 128). Davis, CA: CNS. [Abstract]

Conference Contribution - Verbal presentation and other Conference outputs

Wyatt, N., & Machado, L. (2007, November). Habituation: A neglected mechanism of selective visual attention. Verbal presentation at the Psycolloquy Seminar, Dunedin, New Zealand.

2006

Conference Contribution - Published proceedings: Abstract

Machado, L., Wyatt, N., Devine, A., & Knight, B. (2006). Facilitatory and inhibitory effects of distracting stimuli. Cognitive Neuroscience Society Annual Meeting Program (A supplement of the Journal of Cognitive Neuroscience). (pp. 28). Davis, CA: CNS. [Abstract]

Conference Contribution - Poster Presentation (not in published proceedings)

Murray, J. E., Knight, B., & Machado, L. (2006, May). Processing gender and race in distractor faces is load dependent. Poster session presented at the Association for Psychological Science 18th Annual Convention, New York.

Machado, L., Wyatt, N., Devine, A., & Knight, B. (2006, April). Facilitatory and inhibitory effects of distracting stimuli. Poster session presented at the Cognitive Neuroscience Society Annual Meeting, San Francisco, California.

Conference Contribution - Verbal presentation and other Conference outputs

Wyatt, N., & Machado, L. (2006, November). When do we apply distractor inhibition during selective attention? Verbal presentation at the Psycolloquy Seminar, Dunedin, New Zealand.

Devine, A., Wyatt, N., & Machado, L. (2006, November). Distractibility, aging, and Parkinson's disease. Verbal presentation at the Psycolloquy Seminar, Dunedin, New Zealand.

2005

Journal - Research Article

Kellman, P. J., Garrigan, P., Shipley, T. F., Yin, C., & Machado, L. (2005). 3-D interpolation in object perception: Evidence from an objective performance paradigm. Journal of Experimental Psychology: Human Perception & Performance, 31(3), 558-583.

Marí-Beffa, P., Hayes, A. E., Machado, L., & Hindle, J. V. (2005). Lack of inhibition in Parkinson's disease: Evidence from a lexical decision task. Neuropsychologia, 43, 638-646.

Conference Contribution - Published proceedings: Abstract

Machado, L., Devine, A., & Knight, B. (2005). Inhibitory mechanisms of action planning. Journal of Cognitive Neuroscience, 17(Suppl. S), (pp. 38). [Abstract]

Conference Contribution - Poster Presentation (not in published proceedings)

Wyatt, N., Devine, A., Knight, B., & Machado, L. (2005, December). Distractor inhibition during response planning. Poster session presented at the Motor Control and Cognitive Neuroscience Conference, Dunedin, New Zealand.

Devine, A., & Machado, L. (2005, December). Mechanisms of action control. Poster session presented at the Motor Control and Cognitive Neuroscience Conference, Dunedin, New Zealand.

2004

Journal - Research Article

Machado, L., & Franz, E. (2004). Effects of unilateral distractors: A comparison of eye movement and key press responses. Quarterly Journal of Experimental Psychology Section A, 57(7), 1173-1190.

Machado, L., & Rafal, R. D. (2004). Inhibition of return generated by voluntary saccades is independent of attentional momentum. Quarterly Journal of Experimental Psychology Section A, 57A(5), 789-796.

Machado, L., & Rafal, R. D. (2004). Control of fixation and saccades in humans with chronic lesions of oculomotor cortex. Neuropsychology, 18(1), 115-123.

Machado, L., & Rafal, R. D. (2004). Control of fixation and saccades during an anti-saccade task: An investigation in humans with chronic lesions of oculomotor cortex. Experimental Brain Research, 156, 55-63.

Rafal, R., McGrath, M., Machado, L., & Hindle, J. (2004). Effects of lesions of the human posterior thalamus on ocular fixation during voluntary and visually triggered saccades. Journal of Neurology, Neurosurgery & Psychiatry, 75, 1602-1606.

Conference Contribution - Published proceedings: Abstract

Machado, L. (2004). Does the brain utilise similar inhibitory mechanisms for controlling visual search and actions? Australian Journal of Psychology. 56(S1), (pp. 124). doi: 10.1111/j.1742-9536.2004.tb01897.x

2002

Journal - Research Article

Rafal, R., Danziger, S., Grossi, G., Machado, L., & Ward, R. (2002). Visual detection is gated by attending for action: Evidence from hemispatial neglect. PNAS, 99(25), 16371-16375. doi: 10.1073/pnas.252309099

Ro, T., Machado, L., Kanwisher, N., & Rafal, R. D. (2002). Covert orienting to the locations of targets and distractors: Effects on response channel activation in a flanker task. Quarterly Journal of Experimental Psychology Section A, 55A(3), 917-936.

Muller, N. G., Machado, L., & Knight, R. T. (2002). Contributions of subregions of the prefrontal cortex to working memory: Evidence from brain lesions in humans. Journal of Cognitive Neuroscience, 14(5), 673-686. doi: 10.1162/08989290260138582

Dodds, C., Machado, L., Rafal, R., & Ro, T. (2002). A temporal/nasal asymmetry for blindsight in a localisation task: Evidence for extrageniculate mediation. NeuroReport, 13(5), 655-658.

Conference Contribution - Published proceedings: Abstract

Rafal, R. D., Lauder, J., & Machado, L. J. (2002). Facilitation of voluntary saccades by 1Hz rTMS of the frontal eye field. Proceedings of the Society for Neuroscience Annual Meeting. Washington, DC: SfN. Retrieved from http://web.sfn.org/content/Publications/AnnualMeeting/index.html

Rafal, R., McGrath, M., & Machado, L. (2002). Effect of thalamic lesions on eye movements in humans. Journal of Cognitive Neuroscience. A8(Suppl. S). Retrieved from http://um102.isiknowledge.com/uml/uml_view.cgi

Mari-Beffa, P., Hayes, A., Machado, L., Sheppard, D., Rafal, R., & Hindle, J. V. (2002). Lack of inhibition in Parkinson′s disease: Evidence from decreased negative priming in a lexical decision task. Journal of Cognitive Neuroscience. D7(Suppl. S). Retrieved from http://um102.isiknowledge.com/uml/uml_view.cgi

Dodds, C., Machado, L., Rafal, R., & Ro, T. (2002). A temporal/nasal asymmetry for blindsight: Evidence for extrageniculate mediation. Journal of Vision. 2(7), (pp. 23a). Retrieved from http://journalofvision.org/2/7/23/

2000

Chapter in Book - Research

Rafal, R., Machado, L., Ro, T., & Ingle, H. (2000). Looking forward to looking: Saccade preparation and control of the visual grasp reflex. In S. Monsell & J. Driver (Eds.), Control of cognitive processes: Attention and performance XVIII. (pp. 155-173). Cambridge, MA, USA: MIT Press.

Journal - Research Article

Suwazono, S., Machado, L., & Knight, R. T. (2000). Predictive value of novel stimuli modifies visual event-related potentials and behavior. Clinical Neurophysiology, 111, 29-39.

Machado, L., & Rafal, R. (2000). Control of eye movement reflexes. Experimental Brain Research, 135, 73-80.

Machado, L., & Rafal, R. D. (2000). Strategic control over saccadic eye movements: Studies of the fixation offset effect. Perception & Psychophysics, 62(6), 1236-1242.

Conference Contribution - Published proceedings: Abstract

Machado, L., & Rafal, R. (2000). Control of eye movement reflexes. Journal of Cognitive Neuroscience. (Suppl. S), 106C. Retrieved from http://uml102.isiknowledge.com/uml/uml_view.cgi