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Volumn 111, Issue , 2017, Pages 33-41

Sample size calculations in human electrophysiology (EEG and ERP) studies: A systematic review and recommendations for increased rigor

Author keywords

EEG; Electroencephalogram; ERP; Event related potential; Rigor; Sample size

Indexed keywords

ARTICLE; CALCULATION; EFFECT SIZE; ELECTROENCEPHALOGRAM; ELECTROENCEPHALOGRAPHY; EVENT RELATED POTENTIAL; HUMAN; INTERRATER RELIABILITY; POWER ANALYSIS; RELIABILITY; SAMPLE SIZE; SYSTEMATIC REVIEW; VARIANCE; ELECTROPHYSIOLOGY; EVOKED RESPONSE; METHODOLOGY; PHYSIOLOGY; PROCEDURES; STANDARDS;

EID: 84977098360     PISSN: 01678760     EISSN: 18727697     Source Type: Journal    
DOI: 10.1016/j.ijpsycho.2016.06.015     Document Type: Article
Times cited : (98)

References (61)
  • 1
    • 84946124702 scopus 로고    scopus 로고
    • Pitfalls in reporting sample size calculation in randomized controlled trials published in leading anaesthesia journals: a systematic review
    • Abdulatif, M., Mukhtar, A., Obayah, G., Pitfalls in reporting sample size calculation in randomized controlled trials published in leading anaesthesia journals: a systematic review. Br. J. Anaesth. 115 (2015), 699–707.
    • (2015) Br. J. Anaesth. , vol.115 , pp. 699-707
    • Abdulatif, M.1    Mukhtar, A.2    Obayah, G.3
  • 2
    • 79960760239 scopus 로고    scopus 로고
    • Applied Power Analysis for the Behavioral Sciences
    • Routledge New York, NY
    • Aberson, C.L., Applied Power Analysis for the Behavioral Sciences. 2010, Routledge, New York, NY.
    • (2010)
    • Aberson, C.L.1
  • 3
    • 0003415539 scopus 로고
    • Practical Statistics for Medical Research
    • Chapman and Hall London
    • Altman, D.G., Practical Statistics for Medical Research. 1991, Chapman and Hall, London.
    • (1991)
    • Altman, D.G.1
  • 4
    • 84919935821 scopus 로고    scopus 로고
    • Altered white matter connectivity as a neural substrate for social impairment in Autism Spectrum Disorder
    • Ameis, S.H., Catani, M., Altered white matter connectivity as a neural substrate for social impairment in Autism Spectrum Disorder. Cortex 62 (2015), 158–181.
    • (2015) Cortex , vol.62 , pp. 158-181
    • Ameis, S.H.1    Catani, M.2
  • 5
    • 84967316726 scopus 로고    scopus 로고
    • Improving the rigor of psychophysiology research
    • Baldwin, S.A., Improving the rigor of psychophysiology research. Int. J. Psychophysiol. 111 (2017), 5–16.
    • (2017) Int. J. Psychophysiol. , vol.111 , pp. 5-16
    • Baldwin, S.A.1
  • 6
    • 84891448951 scopus 로고    scopus 로고
    • Introduction to the special issue on reliability and replication in cognitive and affective neuroscience research
    • Barch, D.M., Yarkoni, T., Introduction to the special issue on reliability and replication in cognitive and affective neuroscience research. Cogn. Affect. Behav. Neurosci. 13 (2013), 687–689.
    • (2013) Cogn. Affect. Behav. Neurosci. , vol.13 , pp. 687-689
    • Barch, D.M.1    Yarkoni, T.2
  • 7
    • 0034955839 scopus 로고    scopus 로고
    • Statistical power and effect sizes of clinical neuropsychology research
    • Bezeau, S., Graves, R., Statistical power and effect sizes of clinical neuropsychology research. J. Clin. Exp. Neuropsychol. 23 (2001), 399–406.
    • (2001) J. Clin. Exp. Neuropsychol. , vol.23 , pp. 399-406
    • Bezeau, S.1    Graves, R.2
  • 9
    • 2342664903 scopus 로고    scopus 로고
    • Statistical power and the testing of null hypotheses: a review of contemporary management research and recommendations for future studies
    • Cashen, L.H., Geiger, S.W., Statistical power and the testing of null hypotheses: a review of contemporary management research and recommendations for future studies. Organ. Res. Methods 7 (2004), 151–167.
    • (2004) Organ. Res. Methods , vol.7 , pp. 151-167
    • Cashen, L.H.1    Geiger, S.W.2
  • 10
    • 17144387322 scopus 로고    scopus 로고
    • Identifying outcome reporting bias in randomised trials on PubMed: review of publications and survey of authors
    • Chan, A.W., Altman, D.G., Identifying outcome reporting bias in randomised trials on PubMed: review of publications and survey of authors. Br. Med. J. 330 (2005), 753–758.
    • (2005) Br. Med. J. , vol.330 , pp. 753-758
    • Chan, A.W.1    Altman, D.G.2
  • 11
    • 67650082352 scopus 로고    scopus 로고
    • Reporting of sample size calculation in randomised controlled trials: review
    • Charles, P., Giraudeau, B., Dechartres, A., Baron, G., Ravaud, P., Reporting of sample size calculation in randomised controlled trials: review. Br. Med. J. 338 (2009), 1256–1259.
    • (2009) Br. Med. J. , vol.338 , pp. 1256-1259
    • Charles, P.1    Giraudeau, B.2    Dechartres, A.3    Baron, G.4    Ravaud, P.5
  • 12
    • 34247521531 scopus 로고    scopus 로고
    • Neural evidence for enhanced error detection in major depressive disorder
    • Chiu, P.H., Deldin, P.J., Neural evidence for enhanced error detection in major depressive disorder. Am. J. Psychiatry 164 (2007), 608–616.
    • (2007) Am. J. Psychiatry , vol.164 , pp. 608-616
    • Chiu, P.H.1    Deldin, P.J.2
  • 13
    • 84872139989 scopus 로고    scopus 로고
    • How does noise affect amplitude and latency measurement of event-related potentials (ERPs)? A methodological critique and simulation study
    • Clayson, P.E., Baldwin, S.A., Larson, M.J., How does noise affect amplitude and latency measurement of event-related potentials (ERPs)? A methodological critique and simulation study. Psychophysiology 50 (2013), 174–186.
    • (2013) Psychophysiology , vol.50 , pp. 174-186
    • Clayson, P.E.1    Baldwin, S.A.2    Larson, M.J.3
  • 14
    • 85012147112 scopus 로고
    • Statistical Power Analysis for the Behavioral Sciences
    • second ed. Erlbaum Hillsdale, NJ
    • Cohen, J., Statistical Power Analysis for the Behavioral Sciences. second ed., 1988, Erlbaum, Hillsdale, NJ.
    • (1988)
    • Cohen, J.1
  • 15
    • 85012136973 scopus 로고    scopus 로고
    • Rigor and replication in time-frequency analyses of cognitive electrophysiology data
    • Cohen, M.X., Rigor and replication in time-frequency analyses of cognitive electrophysiology data. Int. J. Psychophysiol. 111 (2017), 80–87.
    • (2017) Int. J. Psychophysiol. , vol.111 , pp. 80-87
    • Cohen, M.X.1
  • 16
    • 0006686282 scopus 로고
    • The crisis of confidence in social psychology
    • Elms, A.C., The crisis of confidence in social psychology. Am. Psychol. 30 (1975), 967–976.
    • (1975) Am. Psychol. , vol.30 , pp. 967-976
    • Elms, A.C.1
  • 17
    • 34547145165 scopus 로고    scopus 로고
    • G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences
    • Faul, F., Erdfelder, E., Lang, A.G., Buchner, A., G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav. Res. Methods 39 (2007), 175–191.
    • (2007) Behav. Res. Methods , vol.39 , pp. 175-191
    • Faul, F.1    Erdfelder, E.2    Lang, A.G.3    Buchner, A.4
  • 18
    • 79960834398 scopus 로고    scopus 로고
    • Electrophysiological evidence for abnormal error monitoring in recurrent major depressive disorder
    • Georgiadi, E., Liotti, M., Nixon, N.L., Liddle, P.F., Electrophysiological evidence for abnormal error monitoring in recurrent major depressive disorder. Psychophysiology 48 (2011), 1192–1202.
    • (2011) Psychophysiology , vol.48 , pp. 1192-1202
    • Georgiadi, E.1    Liotti, M.2    Nixon, N.L.3    Liddle, P.F.4
  • 20
    • 84891634791 scopus 로고    scopus 로고
    • A systematic review of the reporting of sample size calculations and corresponding data components in observational functional magnetic resonance imaging studies
    • Guo, Q., Thabane, L., Hall, G., McKinnon, M., Goeree, R., Pullenayegum, E., A systematic review of the reporting of sample size calculations and corresponding data components in observational functional magnetic resonance imaging studies. NeuroImage 86 (2014), 172–181.
    • (2014) NeuroImage , vol.86 , pp. 172-181
    • Guo, Q.1    Thabane, L.2    Hall, G.3    McKinnon, M.4    Goeree, R.5    Pullenayegum, E.6
  • 21
    • 0035644173 scopus 로고    scopus 로고
    • The abuse of power: the pervasive fallacy of power calculations for data analysis
    • Hoenig, J.M., Heisey, D.M., The abuse of power: the pervasive fallacy of power calculations for data analysis. Am. Stat., 55, 2001, 19.
    • (2001) Am. Stat. , vol.55 , pp. 19
    • Hoenig, J.M.1    Heisey, D.M.2
  • 22
    • 38949140202 scopus 로고    scopus 로고
    • Spatiotemporal dynamics of error processing dysfunctions in major depressive disorder
    • Holmes, A.J., Pizzagalli, D.A., Spatiotemporal dynamics of error processing dysfunctions in major depressive disorder. Arch. Gen. Psychiatry 65 (2008), 179–188.
    • (2008) Arch. Gen. Psychiatry , vol.65 , pp. 179-188
    • Holmes, A.J.1    Pizzagalli, D.A.2
  • 23
    • 77953117831 scopus 로고    scopus 로고
    • Effects of task-relevant incentives on the electrophysiological correlates of error processing in major depressive disorder
    • Holmes, A.J., Pizzagalli, D.A., Effects of task-relevant incentives on the electrophysiological correlates of error processing in major depressive disorder. Cogn. Affect. Behav. Neurosci. 10 (2010), 118–128.
    • (2010) Cogn. Affect. Behav. Neurosci. , vol.10 , pp. 118-128
    • Holmes, A.J.1    Pizzagalli, D.A.2
  • 24
    • 33846563409 scopus 로고    scopus 로고
    • Why most published research findings are false
    • Ioannidis, J.P., Why most published research findings are false. PLoS Med., 2, 2005, e124.
    • (2005) PLoS Med. , vol.2
    • Ioannidis, J.P.1
  • 25
    • 50549104256 scopus 로고    scopus 로고
    • Why most discovered true associations are inflated
    • Ioannidis, J.P., Why most discovered true associations are inflated. Epidemiology 19 (2008), 640–648.
    • (2008) Epidemiology , vol.19 , pp. 640-648
    • Ioannidis, J.P.1
  • 26
    • 84908350439 scopus 로고    scopus 로고
    • How to make more published research true
    • Ioannidis, J.P., How to make more published research true. PLoS Med., 11, 2014, e1001747.
    • (2014) PLoS Med. , vol.11
    • Ioannidis, J.P.1
  • 27
    • 84861748584 scopus 로고    scopus 로고
    • Measuring the prevalence of questionable research practices with incentives for truth telling
    • John, L.K., Loewenstein, G., Prelec, D., Measuring the prevalence of questionable research practices with incentives for truth telling. Psychol. Sci. 23 (2012), 524–532.
    • (2012) Psychol. Sci. , vol.23 , pp. 524-532
    • John, L.K.1    Loewenstein, G.2    Prelec, D.3
  • 28
    • 84890127607 scopus 로고    scopus 로고
    • Committee report: publication guidelines and recommendations for studies using electroencephalography and magnetoencephalography
    • Keil, A., Debener, S., Gratton, G., Junghofer, M., Kappenman, E.S., Luck, S.J., Luu, P., Miller, G.A., Yee, C.M., Committee report: publication guidelines and recommendations for studies using electroencephalography and magnetoencephalography. Psychophysiology 51 (2014), 1–21.
    • (2014) Psychophysiology , vol.51 , pp. 1-21
    • Keil, A.1    Debener, S.2    Gratton, G.3    Junghofer, M.4    Kappenman, E.S.5    Luck, S.J.6    Luu, P.7    Miller, G.A.8    Yee, C.M.9
  • 29
    • 84882983486 scopus 로고    scopus 로고
    • How to calculate sample size and why
    • Kim, J., Seo, B.S., How to calculate sample size and why. Clin. Orthop. Surg. 5 (2013), 235–242.
    • (2013) Clin. Orthop. Surg. , vol.5 , pp. 235-242
    • Kim, J.1    Seo, B.S.2
  • 30
    • 0037009452 scopus 로고    scopus 로고
    • Determining the sample size in a clinical trial
    • Kirby, A., Gebski, V., Keech, A.C., Determining the sample size in a clinical trial. Med. J. Aust. 177 (2002), 256–257.
    • (2002) Med. J. Aust. , vol.177 , pp. 256-257
    • Kirby, A.1    Gebski, V.2    Keech, A.C.3
  • 31
    • 0017360990 scopus 로고
    • The measurement of observer agreement for categorical data
    • Landis, J.R., Koch, G.G., The measurement of observer agreement for categorical data. Biometrics 33 (1977), 159–174.
    • (1977) Biometrics , vol.33 , pp. 159-174
    • Landis, J.R.1    Koch, G.G.2
  • 32
    • 84964671912 scopus 로고    scopus 로고
    • Commitment to cutting-edge research with rigor and replication in psychophysiological science
    • Larson, M.J., Commitment to cutting-edge research with rigor and replication in psychophysiological science. Int. J. Psychophysiol., 102, 2016, ix.
    • (2016) Int. J. Psychophysiol. , vol.102 , pp. ix
    • Larson, M.J.1
  • 33
    • 79251636477 scopus 로고    scopus 로고
    • Sample size calculation in physical medicine and rehabilitation: a systematic review of reporting, characteristics, and results in randomized controlled trials
    • Latif, L.A., Amadera, J.E.D., Pimentel, D., Pimentel, T., Fregni, F., Sample size calculation in physical medicine and rehabilitation: a systematic review of reporting, characteristics, and results in randomized controlled trials. Arch. Phys. Med. Rehabil. 92 (2011), 306–315.
    • (2011) Arch. Phys. Med. Rehabil. , vol.92 , pp. 306-315
    • Latif, L.A.1    Amadera, J.E.D.2    Pimentel, D.3    Pimentel, T.4    Fregni, F.5
  • 34
    • 0035640845 scopus 로고    scopus 로고
    • Some practical guidelines for effective sample size determination
    • Lenth, R.V., Some practical guidelines for effective sample size determination. Am. Stat. 55 (2001), 187–193.
    • (2001) Am. Stat. , vol.55 , pp. 187-193
    • Lenth, R.V.1
  • 35
    • 0035067145 scopus 로고    scopus 로고
    • Post hoc power analysis: an idea whose time has passed?
    • Levine, M., Ensom, M.H.H., Post hoc power analysis: an idea whose time has passed?. Pharmacotherapy 21 (2001), 405–409.
    • (2001) Pharmacotherapy , vol.21 , pp. 405-409
    • Levine, M.1    Ensom, M.H.H.2
  • 36
    • 85012149743 scopus 로고    scopus 로고
    • How to get statistically significant effects in any ERP experiment (and why you shouldn't)
    • Psychophysiology (in press).
    • Luck, S.J., Gaspelin, N. How to get statistically significant effects in any ERP experiment (and why you shouldn't). Psychophysiology (in press).
    • Luck, S.J.1    Gaspelin, N.2
  • 37
    • 0042829184 scopus 로고    scopus 로고
    • Sample size calculations in surgery: are they done correctly?
    • Maggard, M.A., O'Connell, J.B., Liu, J.H., Etzioni, D.A., Ko, C.Y., Sample size calculations in surgery: are they done correctly?. Surgery 134 (2003), 275–279.
    • (2003) Surgery , vol.134 , pp. 275-279
    • Maggard, M.A.1    O'Connell, J.B.2    Liu, J.H.3    Etzioni, D.A.4    Ko, C.Y.5
  • 38
    • 2542567331 scopus 로고    scopus 로고
    • The persistence of underpowered studies in psychological research: causes, consequences, and remedies
    • Maxwell, S.E., The persistence of underpowered studies in psychological research: causes, consequences, and remedies. Psychol. Methods 9 (2004), 147–163.
    • (2004) Psychol. Methods , vol.9 , pp. 147-163
    • Maxwell, S.E.1
  • 39
    • 85003848914 scopus 로고    scopus 로고
    • Meta-analysis and psychophysiology: a tutorial using depression and action-monitoring event-related potentials
    • Moran, T.P., Schroder, H.S., Kneip, C., Moser, J.S., Meta-analysis and psychophysiology: a tutorial using depression and action-monitoring event-related potentials. Int. J. Psychophysiol. 111 (2017), 17–32.
    • (2017) Int. J. Psychophysiol. , vol.111 , pp. 17-32
    • Moran, T.P.1    Schroder, H.S.2    Kneip, C.3    Moser, J.S.4
  • 40
    • 11844280390 scopus 로고    scopus 로고
    • The case against retrospective statistical power analyses with an introduction to power analysis
    • Nakagawa, S., Foster, T.M., The case against retrospective statistical power analyses with an introduction to power analysis. Acta Ethol. 7 (2004), 103–108.
    • (2004) Acta Ethol. , vol.7 , pp. 103-108
    • Nakagawa, S.1    Foster, T.M.2
  • 41
    • 84869023835 scopus 로고    scopus 로고
    • Scientific utopia: II. Restructuring incentives and practices to promote truth over publishability
    • Nosek, B.A., Spies, J.R., Motyl, M., Scientific utopia: II. Restructuring incentives and practices to promote truth over publishability. Perspect. Psychol. Sci. 7 (2012), 615–631.
    • (2012) Perspect. Psychol. Sci. , vol.7 , pp. 615-631
    • Nosek, B.A.1    Spies, J.R.2    Motyl, M.3
  • 42
    • 62949101026 scopus 로고    scopus 로고
    • Post hoc power, observed power, a priori power, retrospective power, prospective power, achieved power: sorting out appropriate uses of statistical power analyses
    • O'Keefe, D.J., Post hoc power, observed power, a priori power, retrospective power, prospective power, achieved power: sorting out appropriate uses of statistical power analyses. Commun. Methods Measures 1 (2007), 291–299.
    • (2007) Commun. Methods Measures , vol.1 , pp. 291-299
    • O'Keefe, D.J.1
  • 43
    • 77955429987 scopus 로고    scopus 로고
    • Depression symptom severity and error-related brain activity
    • Olvet, D.M., Klein, D., Hajcak, G., Depression symptom severity and error-related brain activity. Psychiatry Res. 179 (2010), 30–37.
    • (2010) Psychiatry Res. , vol.179 , pp. 30-37
    • Olvet, D.M.1    Klein, D.2    Hajcak, G.3
  • 44
    • 21244478068 scopus 로고    scopus 로고
    • Post hoc power: a concept whose time has come
    • Onwuegbuzie, A.J., Leech, N.L., Post hoc power: a concept whose time has come. Underst. Stat. 3 (2004), 201–230.
    • (2004) Underst. Stat. , vol.3 , pp. 201-230
    • Onwuegbuzie, A.J.1    Leech, N.L.2
  • 45
    • 84940513037 scopus 로고    scopus 로고
    • Estimating the reproducibility of psychological science
    • Open Science Collaboration. Estimating the reproducibility of psychological science. Science, 349, 2015.
    • (2015) Science , vol.349
  • 47
    • 11144228958 scopus 로고    scopus 로고
    • The effect of erroneous responses on response monitoring in patients with major depressive disorder: a study with event-related potentials
    • Ruchsow, M., Herrnberger, B., Wiesend, C., Gron, G., Spitzer, M., Kiefer, M., The effect of erroneous responses on response monitoring in patients with major depressive disorder: a study with event-related potentials. Psychophysiology 41 (2004), 833–840.
    • (2004) Psychophysiology , vol.41 , pp. 833-840
    • Ruchsow, M.1    Herrnberger, B.2    Wiesend, C.3    Gron, G.4    Spitzer, M.5    Kiefer, M.6
  • 49
    • 0000776765 scopus 로고
    • Statistical power and effect size in marketing research
    • Sawyer, A.G., Ball, A.D., Statistical power and effect size in marketing research. J. Mark. Res. 18 (1981), 275–290.
    • (1981) J. Mark. Res. , vol.18 , pp. 275-290
    • Sawyer, A.G.1    Ball, A.D.2
  • 52
    • 17044362679 scopus 로고    scopus 로고
    • Sample size calculations in randomised trials: mandatory and mystical
    • Schulz, K.F., Grimes, D.A., Sample size calculations in randomised trials: mandatory and mystical. Lancet 365 (2005), 1348–1353.
    • (2005) Lancet , vol.365 , pp. 1348-1353
    • Schulz, K.F.1    Grimes, D.A.2
  • 53
    • 77956041055 scopus 로고    scopus 로고
    • CONSORT 2010 Statement: updated guidelines for reporting parallel group randomised trials
    • Schulz, K.F., Altman, D.G., Moher, D., CONSORT, CONSORT 2010 Statement: updated guidelines for reporting parallel group randomised trials. Open Med. 4 (2010), 60–68.
    • (2010) Open Med. , vol.4 , pp. 60-68
    • Schulz, K.F.1    Altman, D.G.2    Moher, D.3    CONSORT4
  • 54
    • 80555145867 scopus 로고    scopus 로고
    • False-positive psychology: undisclosed flexibility in data collection and analysis allows presenting anything as significant
    • Simmons, J.P., Nelson, L.D., Simonsohn, U., False-positive psychology: undisclosed flexibility in data collection and analysis allows presenting anything as significant. Psychol. Sci. 22 (2011), 1359–1366.
    • (2011) Psychol. Sci. , vol.22 , pp. 1359-1366
    • Simmons, J.P.1    Nelson, L.D.2    Simonsohn, U.3
  • 55
    • 0035956651 scopus 로고    scopus 로고
    • Sifting the evidence–what's wrong with significance tests?
    • Sterne, J.A.C., Smith, G.D., Sifting the evidence–what's wrong with significance tests?. Br. Med. J. 332 (2001), 226–231.
    • (2001) Br. Med. J. , vol.332 , pp. 226-231
    • Sterne, J.A.C.1    Smith, G.D.2
  • 56
    • 84856040423 scopus 로고    scopus 로고
    • Clarifying domains of internalizing psychopathology using neurophysiology
    • Vaidyanathan, U., Nelson, L., Patrick, C.J., Clarifying domains of internalizing psychopathology using neurophysiology. Psychol. Med. 42 (2012), 447–459.
    • (2012) Psychol. Med. , vol.42 , pp. 447-459
    • Vaidyanathan, U.1    Nelson, L.2    Patrick, C.J.3
  • 57
    • 35848948166 scopus 로고    scopus 로고
    • The Strengthening of Reporting of Observational Studies in Epidemiology (STROBE) statement: guidelines for reporting observational studies
    • von Elm, E., Altman, D.G., Egger, M., Pocock, S.J., Gotzsche, P.C., Vandenbrouck, J.P., The Strengthening of Reporting of Observational Studies in Epidemiology (STROBE) statement: guidelines for reporting observational studies. Ann. Intern. Med. 147 (2007), 573–577.
    • (2007) Ann. Intern. Med. , vol.147 , pp. 573-577
    • von Elm, E.1    Altman, D.G.2    Egger, M.3    Pocock, S.J.4    Gotzsche, P.C.5    Vandenbrouck, J.P.6
  • 58
    • 22544462196 scopus 로고    scopus 로고
    • A Bayesian approach on sample size calculation for comparing means
    • Wang, H., Chow, S.C., Chen, M., A Bayesian approach on sample size calculation for comparing means. J. Biopharm. Stat. 15 (2005), 799–807.
    • (2005) J. Biopharm. Stat. , vol.15 , pp. 799-807
    • Wang, H.1    Chow, S.C.2    Chen, M.3
  • 59
    • 0036340211 scopus 로고    scopus 로고
    • Statistics review 4: sample size calculations
    • Whitley, E., Ball, J., Statistics review 4: sample size calculations. Crit. Care 6 (2002), 335–341.
    • (2002) Crit. Care , vol.6 , pp. 335-341
    • Whitley, E.1    Ball, J.2
  • 60
    • 0001653457 scopus 로고    scopus 로고
    • Statistical methods in psychology journals: guidelines and explanations
    • Wilkinson, L., Statistical methods in psychology journals: guidelines and explanations. Am. Psychol. 54 (1999), 594–604.
    • (1999) Am. Psychol. , vol.54 , pp. 594-604
    • Wilkinson, L.1
  • 61
    • 84862180396 scopus 로고    scopus 로고
    • How to calculate sample size in a randomized controlled trial
    • Zhong, B., How to calculate sample size in a randomized controlled trial. J. Thorac. Dis. 1 (2009), 51–54.
    • (2009) J. Thorac. Dis. , vol.1 , pp. 51-54
    • Zhong, B.1


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