I am a Clinical Cognitive Neuroscientist whose research covers several key areas in psychology, including the relationship between endogenous and exogenous factors in understanding the human condition. My current research explores how cannabis use affects brain function, behaviour, and emotion processing, including disorders like depression and PTSD. I collaborate with partners in the UK and PsyUSA. I also advise policymakers and the cannabis industry, and my research is widely published and featured in the media. I also have several cross discipline research collaborations with computer science (AI and face recognition; Human Computer Interaction) and environmental psychology (Soundscapes and Environmental Psychology). I am a chartered psychologist and associate fellow of the British Psychological Society and I sit on the board of trustees for the Society for the Study of Addiction.

Practice (select)

A full list of my publications can be found on google Scholar. Below is a representative sample.

• *Ciesluk, B., Inglis, G., Parke, A. & Troup, L. J., (2024). Systematic Review: The relationship between Gabapentinoids, Etizolam and Drug Related Deaths in Scotland. PLOS ONE 19(10): e0310655. https://doi.org/10.1371/journal.pone.0310655
• Erridge, S., Troup, L. J. & Sodergren, M . H. (2024). Illicit Cannabis Use to Self-Treat Chronic Health Conditions: A Cross-Sectional Study from the United Kingdom. JMIR Public Health Surveill 2024;10:e57595 doi:10.2196/57595
• Troup, L.J. (2024). Individual differences in addictive behaviors. (2024) Frontiers in Psychology, 15, 1386489.
• Erridge, S., Wang, C., Troup, L. J. & Sodergren, M . H. (2024). Awareness of medical cannabis regulations among UK police officers: A cross-sectional study. European Journal of Public Health.
• *Ciesluk, B., Erridge, S., Sodergren, M. H. & Troup, L. J., (2024). Cannabis use in the UK: A quantitative comparison of individual differences in medical and recreational cannabis users. Frontiers Psychology 14. 1279123. Doi: 10.3389/fpsyg.2023.1279123
• Troup L. J., Zhang W. (2022). Editorial: Methods and applications in emotion science. Front Psychol. 2022 Nov 14;13:1058322. doi: 10.3389/fpsyg.2022.1058322. PMID: 36452395; PMCID: PMC9703342.
• Troup L. J., Cservenka A. (2022). Editorial: Cannabis and emotion processing. Front Psychol. 2022 Oct 17;13:1039982. doi: 10.3389/fpsyg.2022.1039982. PMID: 36324790; PMCID: PMC9619079.  
• Troup, L. J., Erridge, S., *Ciesluk, B., & Sodergren, M. H. (2022). Perceived Stigma of Patients Undergoing Treatment with Cannabis-Based Medicinal Products. International Journal of Environmental
• Research and Public Health, 19(12), 7499. https://doi.org/10.3390/ijerph19127499 
• *Flanagan, C & Troup, L. J. (2022) Psychological Flexibility, Birth Satisfaction and Postnatal Trauma Symptoms in Women with Abnormally Invasive Placenta. J Reprod Infant Psychol. 2022 Jul 13:1-12. doi: 10.1080/02646838.2022.2100335. Epub ahead of print. PMID: 35829690.  
• *Torrence, R. D., Troup, L. J., Rojas, D. & Carlson, J. M. (2021). Enhanced contralateral theta oscillations and N170 amplitudes in occipitotemporal scalp regions underlie attentional bias to fearful faces. Int J Psychophysiol. 2021 Jul;165:84-91. doi: 10.1016/j.ijpsycho.2021.04.002. Epub 2021 Apr 20. PMID: 33892017  
• Benfield, J. A., Rainbolt, G., Troup, L. J., & Bell, P. A. (2020). Anthropogenic Noise Source and Intensity Effects on Mood and Relaxation in Simulated Park Environments. Frontiers in psychology, 11, 570694. https://doi.org/10.3389/fpsyg.2020.570694  
• Troup, L. J., ^±Andrejewski J. A. & *Torrence R. D. (2019). The effects of Sex and Cannabis use on Emotion processing: An Event Related Potential Study.  Experimental and Clinical Psychopharmacology. 27, 4, p. 318-325 
• *Torrence, R. D., Rojas, D. & Troup, L. J. (2019). Awareness of emotional faces in cannabis users: An event-related potentials analysis. Frontiers Psychology: Perception Science, https://doi.org/10.3389/fpsyg.2019.00069.  
• *Torrence, R. D., ^±Davis, J., Troup, L. J., & Carlson, J. M. (2019). Variability in human insula grey matter volume predicts awareness for peri-threshold backward masked fearful faces. Journal of Integrated Neuroscience 18(1): 11-15. https://jin.imrpress.org/EN/10.31083/j.jin.2019.01.101  
• *Torrence, R. D., Rojas, D. & Troup, L. J. (2018). Residual effects of cannabis use on attentional bias towards fearful faces.  Neuropsychologia, Vol. 119. pp 482-488. 10.1016/j.neuropsychologia.2018.09.008
• *Torrence, R. D. & Troup, L. J. (2017). Event-related potentials of attentional bias in the facial dot-probe task: A systematic review. Psychophysiology DOI: 10.1111/psyp.13051 
• Troup, L. J., ^±Andrzejewski, J. A., ^±Braunwalder, J. T. & *Torrence, R. D. (2017). The effects of cannabis use and sub-clinical depression on the P3 event related potential in an emotional processing task. Medicine, 96(12), e6385. http://doi.org/10.1097/MD.0000000000006385 
• Troup, L.J., *Bastidas, S., *Nguyen, M.T., ^±Andrzejewski^, J. *Bowers, M. &*Nomi, J.S. (2016). An Event-Related Potential Study on the Effects of Cannabis on Emotion Processing PLOS ONE. http://dx.doi.org/10.1371/journal.pone.0149764 
• Troup, L.J., *Bastidas, S., *Nomi, J., *Nguyen, M.T., & ^±Tong, T. (2015). Face and emotional expression processing and event-related potentials in a case study of impaired face perception. Edorium Journal of Psychology; 1:9–17.  Article ID: 100002P13LT2015 doi:10.5348/P13-2015-2-OA-2  
• Georg, G, Mussbacher, G, Amyot, D, Petriu, D, Troup, L. J., Lozano-Fuentes, S., France R. B.  (2014). Synergy between Activity Theory and Goal/Scenario Modeling for Requirements Elicitation, Analysis, and Evolution. Information and Software Technology, Vol. 59 Issue C pp 109-135 doi:10.1016/j.infsof.2014.11.003 
• *Nomi, J. S., ^±Frances^, C. *Nguyen^, M. T., *Bastidas, S. & Troup, L. J. (2013). Interaction of Emotional Expression and Eye Gaze: An Event Related Potential Study. NeuroReport. 2013 Oct 2; 24(14):813-7. doi: 10.1097/WNR.0b013e3283647682 
• Georg, G., France, R. &Troup, L. J. (2013). Using Activity Theory for the bCMS Case Study. MODELS, 2013 Chapter Models in Software Engineering. Volume 7167 of the series Lecture Notes in Computer Science pp 217-243.  
• Georg G. &Troup, L. J. (2013). Experiences Developing a Requirements Language Based on the Psychological Framework Activity Theory. Proceedings of the MODELS 2013 OCL Workshop, CEUR Workshop Proceedings, Vol 1092, http://ceur-ws.org/Vol-1092, ISSN 1613-0073, pp 63-72, 2013.  
• Mussbacher, G., Alam, W., Alhaj, M., Ali, S., Amalio, N., Barn, B., Clark, T., Combemale, B., Cyneiros, L. M., Fatima, U., France, R., Georg, G., Horkoff, J., Kienzle, J., Leite, J. C., Lethbridge, T. C., Luckey, M., Moreira, A., Mutz, F., Oliveira, P. A., Petriu, D., Schottle, M., Troup, L. J., Werneck, V. M. B. (2013). Assessing composition in modeling approaches. In Proceedings of the CMA 2012 Workshop (CMA ’12). ACM, New York, NY, USA, , Article 1 , 26 pages. DOI=10.1145/2459031.2459032 http://doi.acm.org/10.1145/2459031.2459032 
• Hayne, S., *Li, K & Troup, L. J. (2013). Commanders Intent and Distributed Collaborating Teams. Systems Sciences (HICSS) pp 86-95. 10.1109/HICSS.2013.137 
• Mussbacher, G., Al Abed, W., Alam, W., Ali, S., Beugnard, A., Bonnet, V., Bræk, R., Capozucca, A.,  Cheng, B. H. C., Fatima, U., France, R., Georg, G., Guelfi, N., Istoan, P., Jézéquel, J, Kienzle, J., Klein, J., Lézoray, J., Malakuti, S., Moreira, A., Phung-Khac, A., Troup, L. J. (2012). Comparing Six Modeling Approaches. In Models in Software Engineering: Lecture Notes in Computer Science 7167, pp. 217-243. 10.1007/978-3-642-29645-1_22 
• *Campbell, A. M., Davalos, D., McCabe, D. P. & Troup, L. J. (2011). Executive Functions and Extraversion. Personality and Individual Differences. Vol 5, 6, pp 720-725 
• Doe, S., Barnes, N., Bowen, D., Gilkey, D., Guardiola, G., Ryan, S., Sarell, K., Thomas, L., Troup, L.J., & Palmquist, M. (2011). Discourse of the Firetenders: Considering Contingent   Faculty through the Lens of Activity Theory. College English Vol. 73 (4) pp 428-449. 
• Hayne, S. C., Troup, L. J. & McComb, S. (2010). “Where’s Farah?” Knowledge Silos and Information Fusion by Distributed Collaborating Teams” Information Systems Frontiers, Special Issue on Terrorism Informatics Vol 13 (1) pp 89-100. 10.1007/s10796-010-9274-9 
• *Benfield, J.A., Bell, P.A., Troup, L.J., & *Soderstrom, N.C. (2010). Does anthropogenic noise in national parks impair memory? Environment and Behavior, 42, 693-706   
• *Benfield, J.A., Bell, P.A., Troup, L.J., & *Soderstrom, N. C. (2010). Aesthetic and Affective Effects of Vocal and Traffic Noise on Natural Landscape Assessment. Journal of Environmental Psychology, 30, 103111 
• *Szlemko, W. J., *Benfield, J. A., Bell, P. A., Deffenbacher J. L. & Troup, L. J. (2008). Territorial  Markings as a Predictor of Driver Aggression and Road Rage. Journal of Applied Social Psychology, Vol. 38, (6), pp-1664-1688 
• Troup, L.J., *Pitts, M.A., Volbrecht, V.J., Nerger, J.L. (2005). The Effects of Stimulus Intensity on the Sizes of Chromatic Perceptive Fields. The Journal of the Optical Society of America, A.Vol. 22, (10) pp. 2137-2142 
• *Pitts, M. A., Troup, L. J., Volbrecht, V. J. and Nerger, J. L. (2005). Chromatic perceptive field sizes change with retinal illuminance. Journal of Vision, 5(5), 435-443, http://journalofvision.org/5/5/4/, doi:10.1167/5.5.4 
• Denham, M. J. & Troup, L. J. (1992). Coherent Oscillatory Responses as a Feature Linking Mechanism in an Artificial Neural Network Model of Visual Perception. In Proceedings of NEURO NIMES: The 5th International Conference on Neural Networks and their Applications, Nimes, France. Ec2, Paris, pp. 505516. http://cat.inist.fr/?aModele=afficheN&cpsidt=4923971 
• Denham, M .J, Patel, S., Troup, L. J. & Norman, M. (1991). Oscillatory Neural Networks and their Application to Sensory-Motor Co-ordination and Control in Adaptive Robots. In Proceedings of the IEE 2nd International Conference on Artificial Neural Networks. IEE Publishing, London, pp. 328-332. http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=140342&isnumber=3780 
• Denham, M .J., Patel, S., Troup, L. J. & Norman, M. (1991). Sensory-Motor Control of Intelligent Robots using Oscillatory Neural Networks. In Proceedings of the 30th IEEE Conference on Decision and  Control. Vols. 1-3, pp. 168-169. 10.1109/CDC.1991.261279 

Other activities

• Trustee, Society for the Study of Addiction
• Scottish Government Cross Party Committee on Medical Cannabis Member
• Chartered Psychologist and Member of BPS (CPsychol)
• Associate Fellow of the BPS (AFBPsS)
• Psi Chi Psychology National Honours Society (Lifetime Faculty Member)
• Nu Rho Psi Neuroscience National Honours Society (Lifetime Faculty Member)

Editorial Boards Current 

• Associate Editor Frontiers Psychology – Addiction 
• Assistant Editor “PLOS ONE”
• Associate Editor “PLOS Mental Health” 
• Assistant Editor “Frontiers in Psychology” 
• Assistant Editor “Peer J” 
• Editorial Board “Medicine”