Improving Methodological Standards in Behavioral Interventions for Cognitive Enhancement
Abstract
There is substantial interest in the possibility that cognitive skills can be improved by dedicated behavioral training. Yet despite the large amount of work being conducted in this domain, there is not an explicit and widely agreed upon consensus around the best methodological practices. This document seeks to fill this gap. We start from the perspective that there are many types of studies that are important in this domain—e.g., feasibility, mechanistic, efficacy, and effectiveness. These studies have fundamentally different goals, and, as such, the best-practice methods to meet those goals will also differ. We thus make suggestions in topics ranging from the design and implementation of control groups, to reporting of results, to dissemination and communication, taking the perspective that the best practices are not necessarily uniform across all study types. We also explicitly recognize and discuss the fact that there are methodological issues around which we currently lack the theoretical and/or empirical foundation to determine best practices (e.g., as pertains to assessing participant expectations). For these, we suggest important routes forward, including greater interdisciplinary collaboration with individuals from domains that face related concerns. Our hope is that these recommendations will greatly increase the rate at which science in this domain advances.
Keywords
Cognitive enhancement Behavioral intervention methodologyNotes
Funding
National Science Foundation (DRL-1641280) to Dr C. Shawn Green; Office of Naval Research grant to Dr. Daphne Bavelier.
Compliance with Ethical Standards
Conflict of Interest
The following authors have declared conflict(s) of interest. Bavelier is a founding partner and on the scientific advisory board of Akili Interactive, Boston; Vinogradov is a consultant for Posit Science Corp, Alkermes, Inc., and Mindstrong, Inc.; Ball owns stock in the Visual Awareness Research Group (formerly Visual Awareness, Inc.) and Posit Science, Inc., the companies that market the Useful Field of View Test and speed of processing training software (now the Double Decision exercise in BrainHQ), and is a member of the Posit Science Scientific Advisory Board; Gazzaley is a co-founder, scientific advisor, and BOD member for Akili Interactive Lab and has several patents filed at UCSF for video game enhancement technologies; Jaeggi has an indirect financial interest in the MIND Research Institute, Irvine, CA, whose interests are related to this work; Levi is a member of the Scientific Advisory Board of NovaSight; Morris is on the scientific advisory boards of Neurotrack and of the AARP Global Council on Brain Health; Nahum is a paid consultant for Posit Science; Panizzutti is the founder of NeuroForma LTDA, a company with a financial interest in computerized cognitive training; Seitz is a founder and stakeholder in Carrot Neurotechnology, a company that sells a vision brain game called ULTIMEYES. The other authors declare that they have no conflict of interest.
References
- Acosta, A., Adams, R.B., Jr., Albohn, D.N., Allard, E.S., Beek, T., Benning, S. D., … Zwaan, R. A. (2016). Registered replication report: Strack, Martin, & Stepper (1988). Perspectives on Psychological Science, 11(6), 917–928. doi: https://doi.org/10.1177/1745691616674458.
- Andrews, G. (1999). Efficacy, effectiveness and efficiency in mental health service delivery. The Australian and New Zealand Journal of Psychiatry, 33(3), 316–322. https://doi.org/10.1046/j.1440-1614.1999.00581.x.CrossRefPubMedGoogle Scholar
- Anguera, J.A., Boccanfuso, J., Rintoul, J.L., Al-Hashimi, O., Faraji, F., Janowich, J., … Gazzaley, A. (2013). Video game training enhances cognitive control in older adults. Nature, 501(7465), 97–101. doi: https://doi.org/10.1038/nature12486.
- Au, J., Sheehan, E., Tsai, N., Duncan, G. J., Buschkuehl, M., & Jaeggi, S. M. (2015). Improving fluid intelligence with training on working memory: a meta-analysis. Psychonomic Bulletin & Review, 22(2), 366–377. https://doi.org/10.3758/s13423-014-0699-x.CrossRefGoogle Scholar
- Ball, K., Berch, D. B., Helmers, K. F., Jobe, J. B., Leveck, M. D., Marsiske, M., … Group, A. S. (2002). Effects of cognitive training interventions with older adults: a randomized controlled trial. JAMA, 288(18), 2271–2281.Google Scholar
- Baniqued, P., Allen, C.M., Kranz, M.B., Johnson, K., Sipolins, A., Dickens, C., …, Kramer, A.F. (2015). Working memory, reasoning, and task switching training: transfer effects, limitations, and great expectations?. PLoS One. doi: https://doi.org/10.1371/journal.pone.0142169.
- Barnett, S. M., & Ceci, S. J. (2002). When and where do we apply what we learn?: A taxonomy for far transfer. Psychological Bulletin, 128(4), 612–637.CrossRefGoogle Scholar
- Barry, A. E., Szucs, L. E., Reyes, J. V., Ji, Q., Wilson, K. L., & Thompson, B. (2016). Failure to report effect sizes: the handling of quantitative results in published health education and behavior research. Health Education & Behavior, 43(5), 518–527. https://doi.org/10.1177/1090198116669521.CrossRefGoogle Scholar
- Basak, C., Boot, W. R., Voss, M. W., & Kramer, A. F. (2008). Can training in a real-time strategy video game attenuate cognitive decline in older adults. Psychology and Aging, 23(4), 765–777.CrossRefGoogle Scholar
- Bavelier, D., & Davidson, R. J. (2013). Brain training: games to do you good. Nature, 494(7438), 425–426. https://doi.org/10.1038/494425a.CrossRefPubMedGoogle Scholar
- Bayraktar, S. (2001). A meta-analysis of the effectiveness of computer-assisted instruction in science education. Journal of Research on Technology in Education, 34(2), 173–188.CrossRefGoogle Scholar
- Beaumont, J. L., Havlik, R., Cook, K. F., Hays, R. D., Wallner-Allen, K., Korper, S. P., …, Gershon, R. (2013). Norming plans for the NIH toolbox. Neurology, 80(11 Suppl 3), S87–92. doi: https://doi.org/10.1212/WNL.0b013e3182872e70.
- Bediou, B., Adams, D. M., Mayer, R. E., Tipton, E., Green, C. S., & Bavelier, D. (2018). Meta-analysis of action video game impact on perceptual, attentional, and cognitive skills. Psychological Bulletin, 144(1), 77–110. https://doi.org/10.1037/bul0000130.CrossRefPubMedGoogle Scholar
- Biagianti, B., & Vinogradov, S. (2013). Computerized cognitive training targeting brain plasticity in schizophrenia. Progress in Brain Research, 207, 301–326. https://doi.org/10.1016/B978-0-444-63327-9.00011-4.CrossRefPubMedGoogle Scholar
- Boot, W. R., Simons, D. J., Stothart, C., & Stutts, C. (2013). The pervasive problem with placebos in psychology: why active control groups are not sufficient to rule out placebo effects. Perspectives on Psychological Science, 8(4), 445–454. https://doi.org/10.1177/1745691613491271.CrossRefPubMedGoogle Scholar
- Bryant, D. C. N., & Deluca, J. (2004). Objective measurement of cognitive fatigue in multiple sclerosis. Rehabilitation Psychology, 49(2), 114–122.CrossRefGoogle Scholar
- Carvalho, C., Caetano, J. M., Cunha, L., Rebouta, P., Kaptchuk, T. J., & Kirsch, I. (2016). Open-label placebo treatment in chronic low back pain: a randomized controlled trial. Pain, 157(12), 2766–2772. https://doi.org/10.1097/j.pain.0000000000000700.CrossRefPubMedPubMedCentralGoogle Scholar
- Chen, L. H., & Lee, W. C. (2011). Two-way minimization: a novel treatment allocation method for small trials. PLoS One, 6(12), e28604.CrossRefGoogle Scholar
- Coburn, K. M., & Vevea, J. L. (2015). Publication bias as a function of study characteristics. Psychological Methods, 20(3), 310–330. https://doi.org/10.1037/met0000046.CrossRefPubMedGoogle Scholar
- Colloca, L., & Benedetti, F. (2006). How prior experience shapes placebo analgesia. Pain, 124(1–2), 126–133. https://doi.org/10.1016/j.pain.2006.04.005.CrossRefPubMedGoogle Scholar
- Colloca, L., Klinger, R., Flor, H., & Bingel, U. (2013). Placebo analgesia: psychological and neurobiological mechanisms. Pain, 154(4), 511–514. https://doi.org/10.1016/j.pain.2013.02.002.CrossRefPubMedPubMedCentralGoogle Scholar
- Colzato, L. S., van den Wildenberg, W. P., & Hommel, B. (2014). Cognitive control and the COMT Val(1)(5)(8)Met polymorphism: genetic modulation of videogame training and transfer to task-switching efficiency. Psychological Research, 78(5), 670–678. https://doi.org/10.1007/s00426-013-0514-8.CrossRefPubMedGoogle Scholar
- Davidson, R. J., & Dahl, C. J. (2017). Varieties of contemplative practice. JAMA Psychiatry, 74(2), 121–123. https://doi.org/10.1001/jamapsychiatry.2016.3469.CrossRefPubMedGoogle Scholar
- Davidson, R. J., & Dahl, C. J. (2018). Outstanding challenges in scientific research on mindfulness and meditation. Perspectives on Psychological Science, 13(1), 62–65. https://doi.org/10.1177/1745691617718358.CrossRefPubMedGoogle Scholar
- Deveau, J., Jaeggi, S. M., Zordan, V., Phung, C., & Seitz, A. R. (2014a). How to build better memory training games. Frontiers in Systems Neuroscience, 8, 243. https://doi.org/10.3389/fnsys.2014.00243.CrossRefPubMedGoogle Scholar
- Deveau, J., Ozer, D. J., & Seitz, A. R. (2014b). Improved vision and on-field performance in baseball through perceptual learning. Current Biology, 24(4), R146–R147. https://doi.org/10.1016/j.cub.2014.01.004.CrossRefPubMedGoogle Scholar
- Diao, D., Wright, J. M., Cundiff, D. K., & Gueyffier, F. (2012). Pharmacotherapy for mild hypertension. Cochrane Database of Systematic Reviews(8). doi: https://doi.org/10.1002/14651858.CD006742.pub2.
- Dweck, C. (2006). Mindset: the new psychology of success. New York: Random House.Google Scholar
- Eldridge, S. M., Lancaster, G. A., Campbell, M. J., Thabane, L., Hopewell, S., Coleman, C. L., & Bond, C. M. (2016). Defining feasibility and pilot studies in preparation for randomised controlled trials: development of a conceptual framework. PLoS One, 11(3), e0150205. https://doi.org/10.1371/journal.pone.0150205.CrossRefPubMedPubMedCentralGoogle Scholar
- Engle, R. W., Tuholski, S. W., Laughlin, J. E., & Conway, A. R. A. (1999). Working memory, short-term memory, and general fluid intelligence: a latent variable approach. Journal of Experimental Psychology: General, 128, 309–331.CrossRefGoogle Scholar
- Erickson, K. I., Voss, M. W., Prakash, R. S., Basak, C., Szabo, A., Chaddock, L., et al. (2011). Exercise training increases size of hippocampus and improves memory. Proceedings of the National Academy of Sciences of the United States of America, 108(7), 3017–3022. https://doi.org/10.1073/pnas.1015950108.CrossRefPubMedPubMedCentralGoogle Scholar
- Fassler, M., Meissner, K., Kleijnen, J., Hrobjartsson, A., & Linde, K. (2015). A systematic review found no consistent difference in effect between more and less intensive placebo interventions. Journal of Clinical Epidemiology, 68(4), 442–451. https://doi.org/10.1016/j.jclinepi.2014.11.018.CrossRefPubMedGoogle Scholar
- FEDERAL TRADE COMMISSION, (2016) Plaintiff, V.. Lumos Labs, Inc., a corporation d/b/a Lumosity and Kunal Sarkar, and Michael Scanlon, Individually and as officers of LumoS Labs, Inc. Defendants. , No. Case No. 3:16-cv-00001-sk (United StateS DistricT Court for the Northern District of California, San Francisco Division.Google Scholar
- Fergusson, D., Glass, K. C., Waring, D., & Shapiro, S. (2004). Turning a blind eye: the success of blinding reported in a random sample of randomised placebo controlled trials. BMJ, 328(7437), 432. https://doi.org/10.1136/bmj.37952.631667.EE.CrossRefPubMedPubMedCentralGoogle Scholar
- Foroughi, C. K., Monfort, S. S., Paczynski, M., McKnight, P. E., & Greenwood, P. M. (2016). Placebo effects in cognitive training. PNAS, 113, 7470–7474. https://doi.org/10.1073/pnas.1601243113.CrossRefPubMedGoogle Scholar
- Franceschini, S., Gori, S., Ruffino, M., Viola, S., Molteni, M., & Facoetti, A. (2013). Action video games make dyslexic children read better. Current Biology, 23(6), 462–466. https://doi.org/10.1016/j.cub.2013.01.044.CrossRefPubMedGoogle Scholar
- Fritz, J. M., & Cleland, J. (2003). Effectiveness versus efficacy: more than a debate over language. The Journal of Orthopaedic and Sports Physical Therapy, 33(4), 163–165. https://doi.org/10.2519/jospt.2003.33.4.163.CrossRefPubMedGoogle Scholar
- Green, C. S., & Bavelier, D. (2003). Action video game modifies visual selective attention. Nature, 423(6939), 534–537.CrossRefGoogle Scholar
- Green, C. S., & Bavelier, D. (2012). Learning, attentional control and action video games. Current Biology, 22, R197–R206.CrossRefGoogle Scholar
- Green, C. S., Pouget, A., & Bavelier, D. (2010). Improved probabilistic inference as a general mechanism for learning with action video games. Current Biology, 23, 1573–1579.CrossRefGoogle Scholar
- Green, C. S., Strobach, T., & Schubert, T. (2014). On methodological standards in training and transfer experiments. Psychological Research, 78(6), 756–772. https://doi.org/10.1007/s00426-013-0535-3.CrossRefPubMedGoogle Scholar
- Greitemeyer, T., Osswald, S., & Brauer, M. (2010). Playing prosocial video games increases empathy and decreases schadenfreude. Emotion, 10(6), 796–802. https://doi.org/10.1037/a0020194.CrossRefPubMedGoogle Scholar
- Hallock, H., Collins, D., Lampit, A., Deol, K., Fleming, J., & Valenzuela, M. (2016). Cognitive training for post-acute traumatic brain injury: a systematic review and meta-analysis. Frontiers in Human Neuroscience, 10, 537. https://doi.org/10.3389/fnhum.2016.00537.CrossRefPubMedPubMedCentralGoogle Scholar
- Hawes, Z., Moss, J., Caswell, B., Naqvi, S., & MacKinnon, S. (2017). Enhancing children’s spatial and numerical skills through a dynamic spatial approach to early geometry instruction: effects of a 32-week intervention. Cognition and Instruction, 35(3), 236–264.CrossRefGoogle Scholar
- Head, M. L., Holman, L., Lanfear, R., Kahn, A. T., & Jennions, M. D. (2015). The extent and consequences of p-hacking in science. PLoS Biology, 13(3), e1002106. https://doi.org/10.1371/journal.pbio.1002106.CrossRefPubMedPubMedCentralGoogle Scholar
- Health, N. I. o. (2014). Notice of Revised NIH Definition of “Clinical Trial”. (NOT-OD-15-015). Retrieved from https://grants.nih.gov/grants/guide/notice-files/NOT-OD-15-015.html. Accessed 1 Nov 2018.
- Hendershot, T., Pan, H., Haines, J., Harlan, W. R., Marazita, M. L., McCarty, C. A., …, Hamilton, C. M.. (2015). Using the PhenX toolkit to add standard measures to a study. Curr Protoc Hum Genet, 86, 1 21 21–17. https://doi.org/10.1002/0471142905.hg0121s86.
- Hillman, C. H., Erickson, K. I., & Kramer, A. F. (2008). Be smart, exercise your heart: exercise effects on brain and cognition. Nature Reviews Neuroscience, 9, 58–65.CrossRefGoogle Scholar
- Hills, M., & Armitage, P. (2004). The two-period cross-over clinical trial. 1979. British Journal of Clinical Pharmacology, 58(7), S703–S716; discussion S717-709. https://doi.org/10.1111/j.1365-2125.2004.02275.x.CrossRefPubMedPubMedCentralGoogle Scholar
- Hodes, R. J., Insel, T. R., Landis, S. C., & Research, N. I. H. B. f. N. (2013). The NIH toolbox: setting a standard for biomedical research. Neurology, 80(11 Suppl 3), S1. https://doi.org/10.1212/WNL.0b013e3182872e90.CrossRefPubMedPubMedCentralGoogle Scholar
- Holtzer, R., Shuman, M., Mahoney, J. R., Lipton, R., & Verghese, J. (2011). Cognitive fatigue defined in the context of attention networks. Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition, 18(1), 108–128. https://doi.org/10.1080/13825585.2010.517826.CrossRefPubMedGoogle Scholar
- Hommel, B., Colzato, L. S., Fischer, R., & Christoffels, I. K. (2011). Bilingualism and creativity: benefits in convergent thinking come with losses in divergent thinking. Frontiers in Psychology, 2, 273. https://doi.org/10.3389/fpsyg.2011.00273.CrossRefPubMedPubMedCentralGoogle Scholar
- Howard, J. (2016). Do brain-training exercises really work? CNN. Retrieved from https://www.cnn.com/2016/10/20/health/brain-training-exercises/index.html. Accessed 1 Nov 2018.
- Hrobjartsson, A., Forfang, E., Haahr, M. T., Als-Nielsen, B., & Brorson, S. (2007). Blinded trials taken to the test: an analysis of randomized clinical trials that report tests for the success of blinding. International Journal of Epidemiology, 36(3), 654–663. https://doi.org/10.1093/ije/dym020.CrossRefPubMedGoogle Scholar
- Jaeggi, S. M., Buschkuehl, M., Jonides, J., & Perrig, W. J. (2008). Improving fluid intelligence with training on working memory. Proceedings of the National Academy of Sciences of the United States of America, 105(19), 6829–6833.CrossRefGoogle Scholar
- Jaeggi, S. M., Buschkuehl, M., Jonides, J., & Shah, P. (2011). Short- and long-term benefits of cognitive training. Proceedings of the National Academy of Sciences of the United States of America, 108, 10081–10086.CrossRefGoogle Scholar
- Jones, R. N., Marsiske, M., Ball, K., Rebok, G., Willis, S. L., Morris, J. N., & Tennstedt, S. L. (2013). The ACTIVE cognitive training interventions and trajectories of performance among older adults. Journal of Aging and Health, 25(8 Suppl), 186S–208S. https://doi.org/10.1177/0898264312461938.CrossRefPubMedGoogle Scholar
- Kaptchuk, T. J. (2001). The double-blind, randomized, placebo-controlled trial: gold standard or golden calf? Journal of Clinical Epidemiology, 54(6), 541–549.CrossRefGoogle Scholar
- Kaptchuk, T. J., & Miller, F. G. (2015). Placebo effects in medicine. The New England Journal of Medicine, 373(1), 8–9. https://doi.org/10.1056/NEJMp1504023.CrossRefPubMedGoogle Scholar
- Kaptchuk, T. J., Friedlander, E., Kelley, J. M., Sanchez, M. N., Kokkotou, E., Singer, J. P., et al. (2010). Placebos without deception: a randomized controlled trial in irritable bowel syndrome. PLoS One, 5(12), e15591. https://doi.org/10.1371/journal.pone.0015591.CrossRefPubMedPubMedCentralGoogle Scholar
- Karbach, J., & Unger, K. (2014). Executive control training from middle childhood to adolescence. Frontiers in Psychology, 5, 390. https://doi.org/10.3389/fpsyg.2014.00390.CrossRefPubMedPubMedCentralGoogle Scholar
- Katz, B., Jaeggi, S. M., Buschkuehl, M., Shah, P., & Jonides, J. (2018). The effect of monetary compensation on cognitive training outcomes. Learning and Motivation, 63(77–90).Google Scholar
- Kelley, J. M., Kaptchuk, T. J., Cusin, C., Lipkin, S., & Fava, M. (2012). Open-label placebo for major depressive disorder: a pilot randomized controlled trial. Psychotherapy and Psychosomatics, 81(5), 312–314. https://doi.org/10.1159/000337053.CrossRefPubMedGoogle Scholar
- Kirsch, I. (2005). Placebo psychotherapy: synonym or oxymoron? Journal of Clinical Psychology, 61(7), 791–803. https://doi.org/10.1002/jclp.20126.CrossRefPubMedGoogle Scholar
- Klingberg, T., Fernell, E., Olesen, P. J., Johnson, M., Gustafsson, P., Dahlstrom, K., et al. (2005). Computerized training of working memory in children with ADHD—a randomized, controlled trial. J Am Acad Child Adolesc Psychiatry, 44(2), 177–186.CrossRefGoogle Scholar
- Kolahi, J., Bang, H., & Park, J. (2009). Towards a proposal for assessment of blinding success in clinical trials: up-to-date review. Community Dentistry and Oral Epidemiology, 37(6), 477–484. https://doi.org/10.1111/j.1600-0528.2009.00494.x.CrossRefPubMedPubMedCentralGoogle Scholar
- Kramer, A. F., Larish, J., & Strayer, D. L. (1995). Training for attentional control in dual-task settings: a comparison of young and old adults. Journal of Experimental Psychology: Applied, 1, 50–76.Google Scholar
- Lutz, A., Jha, A. P., Dunne, J. D., & Saron, C. D. (2015). Investigating the phenomenological matrix of mindfulness-related practices from a neurocognitive perspective. The American Psychologist, 70(7), 632–658. https://doi.org/10.1037/a0039585.CrossRefPubMedPubMedCentralGoogle Scholar
- Marchand, E., Stice, E., Rohde, P., & Becker, C. B. (2011). Moving from efficacy to effectiveness trials in prevention research. Behaviour Research and Therapy, 49(1), 32–41. https://doi.org/10.1016/j.brat.2010.10.008.CrossRefPubMedGoogle Scholar
- Mayer, R. E. (Ed.). (2014). Computer games for learning: an evidence-based approach. Cambridge: MIT Press.Google Scholar
- Melby-Lervag, M., & Hulme, C. (2013). Is working memory training effective? A meta-analytic review. Developmental Psychology, 49(2), 270–291.CrossRefGoogle Scholar
- Merzenich, M. M., Nahum, M., & Van Vleet, T. M. (2013). Neuroplasticity: introduction. Progress in Brain Research, 207, xxi–xxvi. https://doi.org/10.1016/B978-0-444-63327-9.10000-1.CrossRefPubMedGoogle Scholar
- Mohr, D. C., Schueller, S. M., Riley, W. T., Brown, C. H., Cuijpers, P., Duan, N., et al. (2015). Trials of intervention principles: evaluation methods for evolving behavioral intervention technologies. Journal of Medical Internet Research, 17(7), e166. https://doi.org/10.2196/jmir.4391.CrossRefPubMedPubMedCentralGoogle Scholar
- Morey, R. D., Romeijn, J.-W., & Rouder, J. N. (2016). The philosophy of Bayes factors and the quantification of statistical evidence. Journal of Mathematical Psychology, 72, 6–18.CrossRefGoogle Scholar
- Nahum, M., Lee, H., & Merzenich, M. M. (2013). Principles of neuroplasticity-based rehabilitation. Progress in Brain Research, 207, 141–171. https://doi.org/10.1016/B978-0-444-63327-9.00009-6.CrossRefPubMedGoogle Scholar
- Nichols, A. L., & Maner, J. K. (2008). The good-subject effect: investigating participant demand characteristics. The Journal of General Psychology, 135(2), 151–165.CrossRefGoogle Scholar
- Noah, T., Yaacov, S., & Mayo, R. (2018). When both the original study and its failed replication are correct: feeling observed eliminates the facial-feedback effect. Journal of Personality and Social Psychology, 114(5), 657–664.CrossRefGoogle Scholar
- Nosek, B. A., Ebersole, C. R., DeHaven, A. C., & Mellor, D. T. (2017). The preregistration revolution. OSF Preprints. doi: https://doi.org/10.17605/OSF.IO/2DXU5.
- O’Leary, K. D., Rosenbaum, A., & Hughes, P. C. (1978). Direct and systematic replication: a rejoinder. Journal of Abnormal Child Psychology, 6(3), 295–297.CrossRefGoogle Scholar
- Onken, L. S., Carroll, K. M., Shoham, V., Cuthbert, B. N., & Riddle, M. (2014). Reenvisioning clinical science: unifying the discipline to improve the public health. Clinical Psychological Science: A Journal of the Association for Psychological Science, 2(1), 22–34. https://doi.org/10.1177/2167702613497932.CrossRefGoogle Scholar
- Open Science, C. (2012). An open, large-scale, collaborative effort to estimate the reproducibility of psychological science. Perspectives on Psychological Science, 7(6), 657–660. https://doi.org/10.1177/1745691612462588.CrossRefGoogle Scholar
- Orne, M. T. (1962). On the social psychology of the psychological experiment: with particular reference to demand characteristics and their implications. American Psychologist, 17, 776–783.CrossRefGoogle Scholar
- Owen, A. M., Hampshire, A., Grahn, J. A., Stenton, R., Dajani, S., Burns, A. S., … Ballard, C. G. (2010). Putting brain training to the test. Nature, 465(7299), 775–778.Google Scholar
- Pashler, H., & Harris, C. R. (2012). Is the replicability crisis overblown? Three arguments examined. Perspectives on Psychological Science, 7(6), 531–536. https://doi.org/10.1177/1745691612463401.CrossRefPubMedGoogle Scholar
- Pek, J., & Flora, D. B. (2017). Reporting effect sizes in original psychological research: a discussion and tutorial. Psychological Methods. doi: https://doi.org/10.1037/met0000126.
- Prakash, R. S., De Leon, A. A., Patterson, B., Schirda, B. L., & Janssen, A. L. (2014). Mindfulness and the aging brain: a proposed paradigm shift. Frontiers in Aging Neuroscience, 6, 120. https://doi.org/10.3389/fnagi.2014.00120.CrossRefPubMedPubMedCentralGoogle Scholar
- Rebok, G. W., Ball, K., Guey, L. T., Jones, R. N., Kim, H. Y., King, J. W., … Group, A. S. (2014). Ten-year effects of the advanced cognitive training for independent and vital elderly cognitive training trial on cognition and everyday functioning in older adults. Journal of the American Geriatrics Society, 62(1), 16–24. doi: https://doi.org/10.1111/jgs.12607.
- Redick, T. S., Shipstead, Z., Harrison, T. L., Hicks, K. L., Fried, D. E., Hambrick, D. Z., … Engle, R. W. (2013). No evidence of intelligence improvement after working memory training: a randomized, placebo-controlled study. Journal of Experimental Psychology: General, 142(2), 359–379.Google Scholar
- Redick, T. S., Shipstead, Z., Wiemers, E. A., Melby-Lervag, M., & Hulme, C. (2015). What’s working in working memory training? An educational perspective. Educational Psychology Review, 27(4), 617–633. https://doi.org/10.1007/s10648-015-9314-6.CrossRefPubMedPubMedCentralGoogle Scholar
- Roberts, G., Quach, J., Spencer-Smith, M., Anderson, P. J., Gathercole, S., Gold, L., … Wake, M. (2016). Academic outcomes 2 years after working memory training for children with low working memory: a randomized clinical trial. JAMA Pediatrics, 170(5), e154568. doi: https://doi.org/10.1001/jamapediatrics.2015.4568.
- Rohde, T. E., & Thompson, L. A. (2007). Predicting academic achievement with cognitive ability. Intelligence, 35(1), 83–92.CrossRefGoogle Scholar
- Rosenthal, R., & Jacobson, L. (1968). Pygmalion in the classroom: teacher expectation and pupils’ intellectual development. New York: Holt, Rinehart and Winston.CrossRefGoogle Scholar
- Ross, L. A., Edwards, J. D., O’Connor, M. L., Ball, K. K., Wadley, V. G., & Vance, D. E. (2016). The transfer of cognitive speed of processing training to older adults’ driving mobility across 5 years. The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences, 71(1), 87–97. https://doi.org/10.1093/geronb/gbv022.CrossRefPubMedGoogle Scholar
- Rotello, C. M., Heit, E., & Dube, C. (2015). When more data steer us wrong: replications with the wrong dependent measure perpetuate erroneous conclusions. Psychonomic Bulletin & Review, 22(4), 944–954. https://doi.org/10.3758/s13423-014-0759-2.CrossRefGoogle Scholar
- Rothbaum, B. O., Price, M., Jovanovic, T., Norrholm, S. D., Gerardi, M., Dunlop, B., … Ressler, K. J. (2014). A randomized, double-blind evaluation of D-cycloserine or alprazolam combined with virtual reality exposure therapy for posttraumatic stress disorder in Iraq and Afghanistan War veterans. The American Journal of Psychiatry, 171(6), 640–648. doi: https://doi.org/10.1176/appi.ajp.2014.13121625.
- Rouder, J. N., Speckman, P. L., Sun, D., Morey, R. D., & Iverson, G. (2009). Bayesian t tests for accepting and rejecting the null hypothesis. Psychonomic Bulletin & Review, 16(2), 225–237. https://doi.org/10.3758/PBR.16.2.225.CrossRefGoogle Scholar
- Rubin, M. (2016). The Perceived Awareness of the Research Hypothesis Scale: assessing the influence of demand characteristics. In.Google Scholar
- Rutherford, B. R., Sneed, J. R., & Roose, S. P. (2009). Does study design influence outcome?. The effects of placebo control and treatment duration in antidepressant trials. Psychotherapy and Psychosomatics, 78(3), 172–181. https://doi.org/10.1159/000209348.CrossRefPubMedPubMedCentralGoogle Scholar
- Saghaei, M. (2011). An overview of randomization and minimization programs for randomized clinical trials. Journal of Medical Signals and Sensors, 1(1), 55–61.PubMedPubMedCentralGoogle Scholar
- Sandler, A. D., & Bodfish, J. W. (2008). Open-label use of placebos in the treatment of ADHD: a pilot study. Child: Care, Health and Development, 34(1), 104–110. https://doi.org/10.1111/j.1365-2214.2007.00797.x.CrossRefGoogle Scholar
- Sandoval, W. A., & Bell, P. (2004). Design-based research methods for studying learning in context: introduction. Educational Psychologist, 39(4), 199–201.CrossRefGoogle Scholar
- Schellenberg, E. G. (2004). Music lessions enhance IQ. Psychological Science, 15(8), 511–514.CrossRefGoogle Scholar
- Schlickum, M. K., Hedman, L., Enochsson, L., Kjellin, A., & Fellander-Tsai, L. (2009). Systematic video game training in surgical novices improves performance in virtual reality endoscopic surgical simulators: a prospective randomized study. World Journal of Surgery, 33(11), 2360–2367.CrossRefGoogle Scholar
- Schmiedek, F., Lövdén, M., & Lindenberger, U. (2010). Hundred days of cognitive training enhance broad abilities in adulthood: findings from the COGITO study. Frontiers in Aging Neuroscience, 2.Google Scholar
- Schönbrodt, F. D., Wagenmakers, E. J., Zehetleitner, M., & Perugini, M. (2017). Sequential hypothesis testing with Bayes factors: efficiently testing mean differences. Psychological Methods, 22(2), 322–339.CrossRefGoogle Scholar
- Schubert, T., & Strobach, T. (2012). Video game experience and optimized executive control skills—on false positives and false negatives: reply to Boot and Simons (2012). Acta Psychologica, 141(2), 278–280.CrossRefGoogle Scholar
- Schulz, K. F., Chalmers, I., & Altman, D. G. (2002). The landscape and lexicon of blinding in randomized trials. Annals of Internal Medicine, 136(3), 254–259.CrossRefGoogle Scholar
- Shiffman, S., Stone, A. A., & Hufford, M. R. (2008). Ecological momentary assessment. Annual Review of Clinical Psychology, 4, 1–32.CrossRefGoogle Scholar
- Shipstead, Z., Redick, T. S., & Engle, R. W. (2012). Is working memory training effective? Psychological Bulletin, 138(4), 623–654.CrossRefGoogle Scholar
- Sidman, M. (1966). Tactics of scientific research: evaluating experimental data in psychology. Oxford: Basic Books.Google Scholar
- Simons, D. J., Boot, W. R., Charness, N., Gathercole, S. E., Chabris, C. F., Hambrick, D. Z., & Stine-Morrow, E. A. (2016). Do “Brain-Training” programs work? Psychological Science in the Public Interest, 17(3), 103–186. https://doi.org/10.1177/1529100616661983.CrossRefPubMedGoogle Scholar
- Singal, A. G., Higgins, P. D., & Waljee, A. K. (2014). A primer on effectiveness and efficacy trials. Clinical Translational Gastroenterology, 5, e45. https://doi.org/10.1038/ctg.2013.13.CrossRefPubMedGoogle Scholar
- Smith, G. E., Housen, P., Yaffe, K., Ruff, R., Kennison, R. F., Mahncke, H. W., & Zelinski, E. M. (2009). A cognitive training program based on principles of brain plasticity: results from Improvement in Memory with Plasticity-based Adaptive cognitive Training (IMPACT) study. Journal of the American Geriatrics Society, 57(4), 594–603.CrossRefGoogle Scholar
- Stieff, M., & Uttal, D. (2015). How much can spatial training improve STEM achievement. Educational Psychology Review, 27(4), 607–615.CrossRefGoogle Scholar
- Stierlin, A. S., Herder, K., Helmbrecht, M. J., Prinz, S., Walendzik, J., Holzmann, M., … Kilian, R. (2014). Effectiveness and efficiency of integrated mental health care programmes in Germany: study protocol of an observational controlled trial. BMC Psychiatry, 14, 163. doi: https://doi.org/10.1186/1471-244X-14-163.
- Strack, F., Martin, L., & Stepper, S. (1988). Inhibiting and facilitating conditions of the human smile: a nonobtrusive test of the facial feedback hypothesis. Journal of Personality and Social Psychology, 54(5), 768–777.CrossRefGoogle Scholar
- Strobach, T., & Karbach, J. (Eds.). (2016). Cognitive training: an overview of features and applications. New York: Springer.Google Scholar
- Strobach, T., Frensch, P. A., & Schubert, T. (2012). Video game practice optimizes executive control skills in dual-task and task switching situations. Acta Psychologica, 140(1), 13–24.CrossRefGoogle Scholar
- Stroebe, W., & Strack, F. (2014). The alleged crisis and the illusion of exact replication. Perspectives on Psychological Science, 9(1), 59–71. https://doi.org/10.1177/1745691613514450.CrossRefPubMedGoogle Scholar
- Subramaniam, K., Luks, T. L., Garrett, C., Chung, C., Fisher, M., Nagarajan, S., & Vinogradov, S. (2014). Intensive cognitive training in schizophrenia enhances working memory and associated prefrontal cortical efficiency in a manner that drives long-term functional gains. NeuroImage, 99, 281–292. https://doi.org/10.1016/j.neuroimage.2014.05.057.CrossRefPubMedPubMedCentralGoogle Scholar
- Sullivan, G. M., & Feinn, R. (2012). Using effect size-or why the P value is not enough. Journal of Graduate Medical Education, 4(3), 279–282. https://doi.org/10.4300/JGME-D-12-00156.1.CrossRefPubMedPubMedCentralGoogle Scholar
- Tang, Y. Y., Ma, Y., Wang, J., Fan, Y., Feng, S., Lu, Q., et al. (2007). Short-term meditation training improves attention and self-regulation. Proceedings of the National Academy of Sciences of the United States of America, 104(43), 17152–17156. https://doi.org/10.1073/pnas.0707678104.CrossRefPubMedPubMedCentralGoogle Scholar
- Taves, D. R. (1974). Minimization: a new method of assigning patients to treatment and control groups. Clinical Pharmacology and Therapeutics, 15, 443–453.CrossRefGoogle Scholar
- Terlecki, M. S., Newcombe, N. S., & Little, M. (2008). Durable and generalized effects of spatial experience on mental rotation: gender differences in growth patterns. Applied Cognitive Psychology, 22, 996–1013.CrossRefGoogle Scholar
- Tickle-Degnen, L. (2013). Nuts and bolts of conducting feasibility studies. The American Journal of Occupational Therapy, 67(2), 171–176. https://doi.org/10.5014/ajot.2013.006270.CrossRefPubMedPubMedCentralGoogle Scholar
- Tsai, N., Buschkuehl, M., Kamarsu, S., Shah, P., Jonides, J., & Jaeggi, S. M. (2018). (Un)Great expectations: the role of placebo effects in cognitive training. Journal of Applied Research in Memory and Cognition, 7(4), 564–573. https://doi.org/10.1016/j.jarmac.2018.06.001.
- Valdes, E.G., Andel, R., Lister, J.J., Gamaldo, A., & Edwards, J.D. (2017). Can cognitive speed of processing training improve everyday functioning among older adults with psychometrically defined mild cognitive impairment? Journal of Aging and Health, 898264317738828. https://doi.org/10.1177/0898264317738828.
- Van Dam, N. T., van Vugt, M. K., Vago, D. R., Schmalzl, L., Saron, C. D., Olendzki, A., et al. (2018). Mind the hype: a critical evaluation and prescriptive agenda for research on mindfulness and meditation. Perspectives on Psychological Science, 13(1), 36–61. https://doi.org/10.1177/1745691617709589.CrossRefPubMedGoogle Scholar
- Voss, M.W., Prakash, R.S., Erickson, K.I., Basak, C., Chaddock, L., Kim, J. S., … Kramer, A. F. (2010). Plasticity of brain networks in a randomized intervention trial of exercise training in older adults. Frontiers in Aging Neuroscience, 2. https://doi.org/10.3389/fnagi.2010.00032.
- Voudouris, N. J., Peck, C. L., & Coleman, G. (1985). Conditioned placebo responses. Journal of Personality and Social Psychology, 48(1), 47–53.CrossRefGoogle Scholar
- Walton, A.G. (2016). Do brain training games work, or is it the placebo effect? Forbes.com. Retrieved from https://www.forbes.com/sites/alicegwalton/2016/06/21/does-brain-training-work-or-is-it-all-placebo/#3b654dc67497. Accessed 1 Nov 2018.
- Weintraub, S., Dikmen, S.S., Heaton, R.K., Tulsky, D.S., Zelazo, P.D., Bauer, P.J., … Gershon, R.C. (2013). Cognition assessment using the NIH toolbox. Neurology, 80(11 Suppl 3), S54–64. https://doi.org/10.1212/WNL.0b013e3182872ded.
- Wexler, B.E., Iseli, M., Leon, S., Zaggle, W., Rush, C., Goodman, A., … Bo, E. (2016). Cognitive priming and cognitive training: immediate and far transfer to academic skills in children. Scientific Reports, 6, 32859. doi: https://doi.org/10.1038/srep32859.
- Whitehead, A. L., Sully, B. G., & Campbell, M. J. (2014). Pilot and feasibility studies: is there a difference from each other and from a randomised controlled trial? Contemporary Clinical Trials, 38(1), 130–133. https://doi.org/10.1016/j.cct.2014.04.001.CrossRefPubMedGoogle Scholar
- Whitlock, L. A., McLaughlin, A. C., & Allaire, J. C. (2012). Individual differences in response to cognitive training: using a multi-modal, attentionally demanding game-based intervention for older adults. Computers in Human Behavior, 28(4), 1091–1096.CrossRefGoogle Scholar
- Willis, S.L., Tennstedt, S.L., Marsiske, M., Ball, K., Elias, J., Koepke, K.M., … Group, A.S. (2006). Long-term effects of cognitive training on everyday functional outcomes in older adults. JAMA, 296(23), 2805–2814.Google Scholar
- Wolfe, J. M., & Kanwisher, N. G. (2018). Not your parent’s NIH clinical trial. Nature Human Behaviour, 2, 107–109.CrossRefGoogle Scholar
- Wright, R., Thompson, W. L., Ganis, G., Newcombe, N. S., & Kosslyn, S. M. (2008). Training generalized spatial skills. Psychonomic Bulletin and Review, 15(4), 763–771.CrossRefGoogle Scholar
- Zhao, W., Hill, M.D., & Palesch, Y. (2012). Minimal sufficient balance—a new strategy to balance baseline covariates and preserve randomness of treatment allocation. Statistical Methods in Medical Research https://doi.org/10.1177/0962280212436447.
- Zwaan, R.A., Etz, A., Lucas, R.E., & Donnellan, M. B. (2017). Making replication mainstream. The Behavioral and Brain Sciences, 1–50. https://doi.org/10.1017/S0140525X17001972.