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Dr Liana Machado

Liana MachadoDr Liana Machado’s primary areas of expertise are neuropsychology and cognitive psychology. Her research focuses on the mechanisms and machinery underlying healthy brain functions and the cognitive deficits that emerge as a result of brain disease and healthy aging. Specifically, she is interested 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.

The Machado lab works with patients suffering from neurological conditions such as stroke and Parkinson’s disease, as well as neurologically-healthy young and aging adults. They combine the knowledge gained from each of these groups so that they can advance the current understanding of brain function and brain dysfunction.

Liana earned a bachelor’s degree in psychology at UCLA and a PhD in Neuroscience at UC Davis. After conducting postdoctoral research for five years in the laboratory of a neurologist in the UK, she joined the Department of Psychology at the University of Otago.

She collaborates with scientists in Europe and the USA, as well as within New Zealand, and she serves the community through presentations and in her role as an invited member of the Neurological Foundation Scientific Advisory Committee.

Find out more about Dr Machado’s research.

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Publications

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

Machado, L., & Devine, A. (2019). Endogenous modulation of compatibility effects: An investigation into the temporal dynamics. Visual Cognition. Advance online publication. doi: 10.1080/13506285.2019.1611684

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

White, N., Naldoza-Drake, P., Black, K., Scullion, L., & Machado, L. (2019). Can improving the nutritional content of bread enhance cognition? Cognitive outcomes from a randomized controlled trial. Journal of Cognitive Enhancement. Advance online publication. doi: 10.1007/s41465-019-00149-0

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

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.

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Journal - Research Article

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

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

White, N., Naldoza-Drake, P., Black, K., Scullion, L., & Machado, L. (2019). Can improving the nutritional content of bread enhance cognition? Cognitive outcomes from a randomized controlled trial. Journal of Cognitive Enhancement. Advance online publication. doi: 10.1007/s41465-019-00149-0

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

Machado, L., & Devine, A. (2019). Endogenous modulation of compatibility effects: An investigation into the temporal dynamics. Visual Cognition. Advance online publication. doi: 10.1080/13506285.2019.1611684

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

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. Advance online publication. doi: 10.1080/13803395.2018.1485880

White, N., Flannery, L., McClintock, A., & Machado, L. (2018). Repeated computerized cognitive testing: Performance shifts and test–retest reliability in healthy older adults. Journal of Clinical & Experimental Neuropsychology. Advance online publication. doi: 10.1080/13803395.2018.1526888

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

Machado, L., Thompson, L. M., & Brett, C. H. R. (2018). Visual analogue mood scale scores in healthy young versus older adults. International Psychogeriatrics. Advance online publication. doi: 10.1017/S1041610218000996

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

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

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

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

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

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

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

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

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

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

Guiney, H., & Machado, L. (2013). Benefits of regular aerobic exercise for executive functioning in healthy populations. Psychonomic Bulletin & Review, 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

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

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

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

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

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

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

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.

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.

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.

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.

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.

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

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

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

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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

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

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Conference Contribution - Published proceedings: Abstract

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. New Zealand Journal of Sport & Exercise Science, 1.2, 21. [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? New Zealand Journal of Sport & Exercise Science, 1.2, 61. [Abstract]

More publications...