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Trosolwyg
Crynodeb ymchwil
Mae fy niddordebau ymchwil ym maes cof episodig dynol, sy'n gof am ein gorffennol personol. Nod un elfen o ymchwil yn y maes hwn yw mireinio modelau cof seicolegol er mwyn cael gwell dealltwriaeth o'r prosesau sy'n cyfrannu at gydnabod barn cof a sut maent yn ymwneud â'i gilydd. Cwestiwn arall yr wyf yn ymchwilio iddo yw sut y gall unigolion iach adfer gwybodaeth berthnasol yn ddetholus heb adfer llifogydd o atgofion amherthnasol. Mae'r holl ymchwil hon yn cymryd ymagwedd aml-foddol (ymddygiadol, EEG, MEG a fMRI) sy'n caniatáu dadansoddiad integredig o'r prosesau, cwrs amser a rhanbarthau'r ymennydd sy'n gysylltiedig â'r cof episodig.
Fy ail faes diddordeb yw archwilio'r diffygion gwybyddol sy'n bresennol mewn unigolion o fewn y sbectrwm sgitsoffrenia a chroesi'r cysylltiad posibl â symptomau clinigol. Mae'r gwaith hwn wedi archwilio sylw, dysgu ac yn fwy diweddar diffygion cof ac wedi defnyddio ystod o dechnegau (e.e. ymddygiadol, ffarmacolegol, EMG ac EEG).
Crynodeb addysgu
Rwy'n addysgu ar bob lefel o'r radd Seicoleg Israddedigion a hefyd ar y cwrs Meistr mewn Niwroddelweddu. Rwy'n rhoi cyfres o 6 darlith ar gof i fyfyrwyr ym mlwyddyn gyntaf y radd Seicoleg ar gyfer Iaith a Chof, mae'r rhain yn cwmpasu: ffactorau sy'n effeithio ar amgodio ac adfer o'r cof, cof ffynhonnell a sgitsoffrenia, amnesia ac anghofio. Rwy'n goruchwylio myfyrwyr blwyddyn olaf ar eu prosiectau ymchwil. Mae'r rhain fel arfer ar ryw agwedd o'r cof e.e. cof ffug, monitro realiti, meddwl episodig yn y dyfodol; ac mae rhai o'r prosiectau hyn hefyd yn archwilio sgitsoffoteipi. Rwy'n diwtor personol i fyfyrwyr ar wahanol lefelau o'r radd Israddedig
Cyhoeddiad
2024
- Reed, L. S. and Evans, L. H. 2024. The positive dimension of schizotypy is associated with self-report measures of autobiographical memory and future thinking but not experimenter-scored indices. Memory 32(3), pp. 383-395. (10.1080/09658211.2024.2325525)
2023
- Jackson, L. E., Han, Y. and Evans, L. H. 2023. The efficacy of electroencephalography neurofeedback for enhancing episodic memory in healthy and clinical participants: A systematic qualitative review and meta-analysis. Neuroscience & Biobehavioral Reviews 155, article number: 105455. (10.1016/j.neubiorev.2023.105455)
2021
- Zajkowski, W., Krzeminski, D., Barone, J., Evans, L. and Zhang, J. 2021. Breaking deadlocks: reward probability and spontaneous preference shape voluntary decisions and electrophysiological signals in humans. Computational Brain & Behavior 4, pp. 191-212. (10.1007/s42113-020-00096-6)
2020
- Xia, J. and Evans, L. H. 2020. Neural evidence that disengaging memory retrieval is modulated by stimulus valence and rumination. Scientific Reports 10(1), article number: 7548. (10.1038/s41598-020-64404-7)
2019
- Drew, C. J. G. et al. 2019. A protocol for a randomised controlled, double-blind feasibility trial investigating fluoxetine treatment in improving memory and learning impairments in patients with mesial temporal lobe epilepsy: Fluoxetine, Learning and Memory in Epilepsy (FLAME trial). Pilot and Feasibility Studies 5(1), article number: 87. (10.1186/s40814-019-0474-x)
- Evans, L. H. and Herron, J. E. 2019. Pre-retrieval event-related potentials predict source memory during task switching. NeuroImage 194, pp. 174-181. (10.1016/j.neuroimage.2019.03.038)
- Evans, L., McCann, H., Isgar, J. and Gaston, A. 2019. High delusional ideation is associated with false pictorial memory. Journal of Behavior Therapy and Experimental Psychiatry 62, pp. 97-102. (10.1016/j.jbtep.2018.09.005)
2018
- Dimitriadis, S., Brindley, L., Evans, L., Linden, D. E. J. and Singh, K. D. 2018. A novel, fast, reliable and data-driven method for simultaneous single-trial mining and amplitude - latency estimation based on proximity graphs and network analysis. Frontiers in Neuroinformatics 12, article number: 59. (10.3389/fninf.2018.00059)
- Evans, L. H. and Wilding, E. L. 2018. On the sensitivity of event-related fields to recollection and familiarity. Brain and Cognition 126, pp. 33-39. (10.1016/j.bandc.2018.07.007)
- Herron, J. E. and Evans, L. H. 2018. Preparation breeds success: Brain activity predicts remembering. Cortex 106, pp. 1-11. (10.1016/j.cortex.2018.04.009)
2017
- Humpston, C., Evans, L., Teufel, C., Niklas, I. and Linden, D. E. J. 2017. Evidence of absence: no relationship between behaviourally measured prediction error response and schizotypy. Cognitive Neuropsychiatry 22(5), pp. 373-390. (10.1080/13546805.2017.1348289)
- Humpston, C. S., Linden, D. E. J. and Evans, L. H. 2017. Deficits in reality and internal source monitoring of actions are associated with the positive dimension of schizotypy. Psychiatry Research 250, pp. 44-49. (10.1016/j.psychres.2017.01.063)
- Doidge, A. N., Evans, L. H., Herron, J. E. and Wilding, E. L. 2017. Separating content-specific retrieval from post-retrieval processing. Cortex 86, pp. 1-10. (10.1016/j.cortex.2016.10.003)
2016
- Williams, A., Evans, L., Herron, J. and Wilding, E. L. 2016. On the antecedents of an electrophysiological signature of retrieval mode. PLoS ONE 11(12), article number: e0167574. (10.1371/journal.pone.0167574)
- Herron, J. E., Evans, L. H. and Wilding, E. L. 2016. Electrophysiological evidence for flexible goal-directed cue processing during episodic retrieval. NeuroImage 132, pp. 24-31. (10.1016/j.neuroimage.2016.02.025)
2015
- Evans, L. H., Williams, A. N. and Wilding, E. L. 2015. Electrophysiological evidence for retrieval mode immediately after a task switch. NeuroImage 108, pp. 435-440. (10.1016/j.neuroimage.2014.12.068)
- Evans, L. H., Herron, J. E. and Wilding, E. L. 2015. Direct real-time neural evidence for task-set inertia. Psychological Science 26(3), pp. 284-290. (10.1177/0956797614561799)
2013
- Schmechtig, A. et al. 2013. The effects of ketamine and risperidone on eye movement control in healthy volunteers. Translational Psychiatry 3(12), article number: e334. (10.1038/tp.2013.109)
- Elward, R. L., Evans, L. H. and Wilding, E. L. 2013. The role of working memory capacity in the control of recollection. Cortex 49(6), pp. 1452-1462. (10.1016/j.cortex.2012.07.003)
- Wilding, E. L. and Evans, L. H. 2013. Familiarity and priming: comment on data points highlighted by Voss and colleagues. Cognitive Neuroscience
2012
- Evans, L. H. and Wilding, E. L. 2012. Recollection and familiarity make independent contributions to recognition memory. Journal of Neuroscience 32(21), pp. 7253-7257. (10.1523/JNEUROSCI.6396-11.2012)
- Evans, L. H., Herron, J. and Wilding, E. L. 2012. Electrophysiological insights into control over recollection. Cognitive Neuroscience 3(3-4), pp. 168-173. (10.1080/17588928.2012.662217)
2010
- Evans, L. H., Wilding, E. L., Hibbs, C. S. and Herron, J. 2010. An electrophysiological study of boundary conditions for control of recollection in the exclusion task. Brain Research 1324, pp. 43-53. (10.1016/j.brainres.2010.02.010)
- Haselgrove, M. and Evans, L. H. 2010. Variations in selective and nonselective prediction error with the negative dimension of schizotypy. The Quarterly Journal of Experimental Psychology 63(6), pp. 1127-1149. (10.1080/17470210903229979)
2007
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2007. Reduced P50 suppression is associated with the cognitive disorganisation dimension of schizotypy. Schizophrenia Research 97(1-3), pp. 152-162. (10.1016/j.schres.2007.07.019)
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2007. A new continuous within-participants latent inhibition task: Examining associations with schizotypy dimensions, smoking status and gender. Biological Psychology 74(3), pp. 365-373. (10.1016/j.biopsycho.2006.09.007)
2005
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2005. Prepulse inhibition of startle and its moderation by schizotypy and smoking. Psychophysiology 42(2), pp. 223-231. (10.1111/j.1469-8986.2005.00280.x)
2004
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2004. Facilitation and reduction of prepulse inhibition: Relationships to the positive and negative dimensions of psychometric schizotypy [Abstract]. Schizophrenia Research 67(S1), pp. 127-128. (10.1016/j.schres.2003.10.001)
Articles
- Reed, L. S. and Evans, L. H. 2024. The positive dimension of schizotypy is associated with self-report measures of autobiographical memory and future thinking but not experimenter-scored indices. Memory 32(3), pp. 383-395. (10.1080/09658211.2024.2325525)
- Jackson, L. E., Han, Y. and Evans, L. H. 2023. The efficacy of electroencephalography neurofeedback for enhancing episodic memory in healthy and clinical participants: A systematic qualitative review and meta-analysis. Neuroscience & Biobehavioral Reviews 155, article number: 105455. (10.1016/j.neubiorev.2023.105455)
- Zajkowski, W., Krzeminski, D., Barone, J., Evans, L. and Zhang, J. 2021. Breaking deadlocks: reward probability and spontaneous preference shape voluntary decisions and electrophysiological signals in humans. Computational Brain & Behavior 4, pp. 191-212. (10.1007/s42113-020-00096-6)
- Xia, J. and Evans, L. H. 2020. Neural evidence that disengaging memory retrieval is modulated by stimulus valence and rumination. Scientific Reports 10(1), article number: 7548. (10.1038/s41598-020-64404-7)
- Drew, C. J. G. et al. 2019. A protocol for a randomised controlled, double-blind feasibility trial investigating fluoxetine treatment in improving memory and learning impairments in patients with mesial temporal lobe epilepsy: Fluoxetine, Learning and Memory in Epilepsy (FLAME trial). Pilot and Feasibility Studies 5(1), article number: 87. (10.1186/s40814-019-0474-x)
- Evans, L. H. and Herron, J. E. 2019. Pre-retrieval event-related potentials predict source memory during task switching. NeuroImage 194, pp. 174-181. (10.1016/j.neuroimage.2019.03.038)
- Evans, L., McCann, H., Isgar, J. and Gaston, A. 2019. High delusional ideation is associated with false pictorial memory. Journal of Behavior Therapy and Experimental Psychiatry 62, pp. 97-102. (10.1016/j.jbtep.2018.09.005)
- Dimitriadis, S., Brindley, L., Evans, L., Linden, D. E. J. and Singh, K. D. 2018. A novel, fast, reliable and data-driven method for simultaneous single-trial mining and amplitude - latency estimation based on proximity graphs and network analysis. Frontiers in Neuroinformatics 12, article number: 59. (10.3389/fninf.2018.00059)
- Evans, L. H. and Wilding, E. L. 2018. On the sensitivity of event-related fields to recollection and familiarity. Brain and Cognition 126, pp. 33-39. (10.1016/j.bandc.2018.07.007)
- Herron, J. E. and Evans, L. H. 2018. Preparation breeds success: Brain activity predicts remembering. Cortex 106, pp. 1-11. (10.1016/j.cortex.2018.04.009)
- Humpston, C., Evans, L., Teufel, C., Niklas, I. and Linden, D. E. J. 2017. Evidence of absence: no relationship between behaviourally measured prediction error response and schizotypy. Cognitive Neuropsychiatry 22(5), pp. 373-390. (10.1080/13546805.2017.1348289)
- Humpston, C. S., Linden, D. E. J. and Evans, L. H. 2017. Deficits in reality and internal source monitoring of actions are associated with the positive dimension of schizotypy. Psychiatry Research 250, pp. 44-49. (10.1016/j.psychres.2017.01.063)
- Doidge, A. N., Evans, L. H., Herron, J. E. and Wilding, E. L. 2017. Separating content-specific retrieval from post-retrieval processing. Cortex 86, pp. 1-10. (10.1016/j.cortex.2016.10.003)
- Williams, A., Evans, L., Herron, J. and Wilding, E. L. 2016. On the antecedents of an electrophysiological signature of retrieval mode. PLoS ONE 11(12), article number: e0167574. (10.1371/journal.pone.0167574)
- Herron, J. E., Evans, L. H. and Wilding, E. L. 2016. Electrophysiological evidence for flexible goal-directed cue processing during episodic retrieval. NeuroImage 132, pp. 24-31. (10.1016/j.neuroimage.2016.02.025)
- Evans, L. H., Williams, A. N. and Wilding, E. L. 2015. Electrophysiological evidence for retrieval mode immediately after a task switch. NeuroImage 108, pp. 435-440. (10.1016/j.neuroimage.2014.12.068)
- Evans, L. H., Herron, J. E. and Wilding, E. L. 2015. Direct real-time neural evidence for task-set inertia. Psychological Science 26(3), pp. 284-290. (10.1177/0956797614561799)
- Schmechtig, A. et al. 2013. The effects of ketamine and risperidone on eye movement control in healthy volunteers. Translational Psychiatry 3(12), article number: e334. (10.1038/tp.2013.109)
- Elward, R. L., Evans, L. H. and Wilding, E. L. 2013. The role of working memory capacity in the control of recollection. Cortex 49(6), pp. 1452-1462. (10.1016/j.cortex.2012.07.003)
- Wilding, E. L. and Evans, L. H. 2013. Familiarity and priming: comment on data points highlighted by Voss and colleagues. Cognitive Neuroscience
- Evans, L. H. and Wilding, E. L. 2012. Recollection and familiarity make independent contributions to recognition memory. Journal of Neuroscience 32(21), pp. 7253-7257. (10.1523/JNEUROSCI.6396-11.2012)
- Evans, L. H., Herron, J. and Wilding, E. L. 2012. Electrophysiological insights into control over recollection. Cognitive Neuroscience 3(3-4), pp. 168-173. (10.1080/17588928.2012.662217)
- Evans, L. H., Wilding, E. L., Hibbs, C. S. and Herron, J. 2010. An electrophysiological study of boundary conditions for control of recollection in the exclusion task. Brain Research 1324, pp. 43-53. (10.1016/j.brainres.2010.02.010)
- Haselgrove, M. and Evans, L. H. 2010. Variations in selective and nonselective prediction error with the negative dimension of schizotypy. The Quarterly Journal of Experimental Psychology 63(6), pp. 1127-1149. (10.1080/17470210903229979)
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2007. Reduced P50 suppression is associated with the cognitive disorganisation dimension of schizotypy. Schizophrenia Research 97(1-3), pp. 152-162. (10.1016/j.schres.2007.07.019)
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2007. A new continuous within-participants latent inhibition task: Examining associations with schizotypy dimensions, smoking status and gender. Biological Psychology 74(3), pp. 365-373. (10.1016/j.biopsycho.2006.09.007)
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2005. Prepulse inhibition of startle and its moderation by schizotypy and smoking. Psychophysiology 42(2), pp. 223-231. (10.1111/j.1469-8986.2005.00280.x)
- Evans, L. H., Gray, N. S. and Snowden, R. J. 2004. Facilitation and reduction of prepulse inhibition: Relationships to the positive and negative dimensions of psychometric schizotypy [Abstract]. Schizophrenia Research 67(S1), pp. 127-128. (10.1016/j.schres.2003.10.001)
Ymchwil
Pynciau ymchwil a phapurau cysylltiedig
Cof Episodig
Ar hyn o bryd mae ffocws fy ngwaith ar gof episodig dynol, yn enwedig adfer cof. Un elfen o ymchwil yw mireinio modelau cof seicolegol er mwyn cael gwell dealltwriaeth o'r prosesau sy'n cyfrannu at gydnabod dyfarniadau cof a sut maent yn ymwneud â'i gilydd. Mae ymchwil electroffisiolegol wedi bod yn ddylanwadol wrth awgrymu bod dwy broses wahanol: atgof a chyfarwydddeb, ond mae'n ddadleuol sut mae'r prosesau hyn yn gysylltiedig â'i gilydd. Gan ddefnyddio mynegeion magnetoencephalograffeg (MEG) o brosesau adfer cof rydym wedi gallu dyfarnu rhwng gwahanol gyfrifon a dod o hyd i gefnogaeth gref bod atgof a chyfarwydddra yn gwneud cyfraniadau annibynnol i ddyfarniadau cof. Cyflawnwyd hyn drwy fesur gweithgarwch niwral ar gyfartaledd a chyferbynnu ar draws gwahanol amodau diddordeb.
Mewn gwaith arall rydym yn ymchwilio i brosesau rheoli cof. Dros amser, mae llawer iawn o wybodaeth episodig yn cael ei storio yn y cof, ac mae sefyllfaoedd gwahanol yn gofyn am adfer elfennau penodol o wybodaeth gyd-destunol sy'n berthnasol i'r dasg dan sylw. Mae gan unigolion iach y gallu i adfer gwybodaeth berthnasol yn ddetholus heb adfer llifogydd o atgofion episodig amherthnasol, sy'n dangos bod adalw episodig yn cael ei arwain a'i gyfyngu i bob pwrpas gan brosesau rheoli. Nod ein gwaith gan ddefnyddio EEG yw nodi a phennu arwyddocâd swyddogaethol y prosesau rheoli hyn a'r gwahanol gamau adfer y maent yn gweithredu ynddynt.
Seicoleg Glinigol
Y maes ymchwil arall y mae gennyf ddiddordeb ynddo yw a) egluro'r diffygion gwybyddol sy'n bresennol mewn unigolion o fewn y sbectrwm sgitsoffrenia, a b) sut y gallai'r rhain fod yn gysylltiedig â rhai symptomau clinigol. Mae'r rhan fwyaf o'r gwaith hwn wedi cymryd ymagwedd ddimensiwn tuag at sgitsoffrenia ac wedi mesur sgitsoffoteipi mewn gwirfoddolwyr iach.
Mae peth o'r gwaith hwn wedi archwilio gwall rhagfynegi, sef yr anghysondeb rhwng disgwyliad a phrofiad. Trwy leihau'r gwall hwn, gall unigolyn wella ei allu i ragweld digwyddiadau yn eu hamgylchedd. Cynigiwyd y gall unigolion â sgitsoffrenia ddangos defnydd annormal o'r signal gwall hwn sy'n arwain at ffurfio cymdeithasau amhriodol sydd yn ei dro yn arwain at rai o'r symptomau seicotig. Rwyf wedi archwilio hyn gan ddefnyddio patrymau dysgu amrywiol, megis ataliad cudd a blocio Kamin ac ar hyn o bryd rwy'n edrych ar hyn yn y parth canfyddiadol.
Mae gen i ddiddordeb hefyd mewn diffygion mewn cof episodig mewn unigolion yn y sbectrwm sgitsoffrenia. Mae'r rhain yn bwysig oherwydd eu bod yn un o'r rhagfynegyddion cryfaf o ganlyniad swyddogaethol mewn grwpiau cleifion. Mae gen i ddiddordeb yn y gallu i benderfynu ar darddiad, neu ffynhonnell, cof ac yn benodol gwneud barn am eich hun yn erbyn eraill e.e. a wnes i hynny neu a wnaethoch chi?; Adwaenir fel Monitro Realiti.
Addysgu
Rwy'n addysgu ar bob lefel o'r radd Seicoleg Israddedigion a hefyd ar y cwrs Meistr mewn Niwroddelweddu. Rwy'n rhoi cyfres o 6 darlith ar gof i fyfyrwyr ym mlwyddyn gyntaf y radd Seicoleg ar gyfer Iaith a Chof, mae'r rhain yn cwmpasu: ffactorau sy'n effeithio ar amgodio ac adfer o'r cof, cof ffynhonnell a sgitsoffrenia, amnesia ac anghofio. Rwy'n goruchwylio myfyrwyr blwyddyn olaf ar eu prosiectau ymchwil. Mae'r rhain fel arfer ar ryw agwedd o'r cof e.e. cof ffug, monitro realiti, meddwl episodig yn y dyfodol; ac mae rhai o'r prosiectau hyn hefyd yn archwilio sgitsoffoteipi. Rwy'n diwtor personol i fyfyrwyr ar wahanol lefelau o'r radd Israddedig
Rwy'n Gymrawd yr Academi Addysg Uwch.
Contact Details
+44 29208 70080
Canolfan Ymchwil Delweddu'r Ymennydd Prifysgol Caerdydd, Heol Maendy, Caerdydd, CF24 4HQ