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Year Number of Results
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1936 3
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1946 2
1947 3
1948 2
1949 1
1950 3
1951 3
1952 1
1953 3
1954 3
1955 2
1956 6
1957 3
1958 1
1959 7
1960 2
1961 13
1962 8
1963 5
1964 7
1965 12
1966 19
1967 17
1968 19
1969 29
1970 26
1971 29
1972 26
1973 39
1974 51
1975 175
1976 204
1977 186
1978 214
1979 258
1980 301
1981 329
1982 367
1983 430
1984 517
1985 596
1986 619
1987 760
1988 853
1989 1173
1990 1215
1991 1357
1992 1533
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1994 2018
1995 2320
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1998 2868
1999 3104
2000 3322
2001 3589
2002 3650
2003 4124
2004 4610
2005 5054
2006 5525
2007 6009
2008 6434
2009 6914
2010 7338
2011 8280
2012 9257
2013 10012
2014 10522
2015 10839
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2017 11392
2018 12172
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2020 15177
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2024 18565
2025 132

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240,252 results

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Page 1
Random sampling, randomization, and equivalence of contrasted groups in psychotherapy outcome research.
Hsu LM. Hsu LM. J Consult Clin Psychol. 1989 Feb;57(1):131-7. doi: 10.1037//0022-006x.57.1.131. J Consult Clin Psychol. 1989. PMID: 2647799 Review.
Random sampling and random assignment (randomization) are some of the most popular methods of equating contrasted groups on pre-existing nuisance variables. ...This article identifies conditions under which equivalence is likely (and unlikely) to be at …
Random sampling and random assignment (randomization) are some of the most popular methods of equating contraste …
Stratified randomization for clinical trials.
Kernan WN, Viscoli CM, Makuch RW, Brass LM, Horwitz RI. Kernan WN, et al. J Clin Epidemiol. 1999 Jan;52(1):19-26. doi: 10.1016/s0895-4356(98)00138-3. J Clin Epidemiol. 1999. PMID: 9973070 Free article. Review.
Trialists argue about the usefulness of stratified randomization. For investigators designing trials and readers who use them, the argument has created uncertainty regarding the importance of stratification. ...Additional resources included textbooks. Stratified randomi …
Trialists argue about the usefulness of stratified randomization. For investigators designing trials and readers who use them, the ar …
Exploring mixture estimators in stratified random sampling.
Iqbal K, Raza SMM, Mahmood T, Riaz M. Iqbal K, et al. PLoS One. 2024 Sep 17;19(9):e0307607. doi: 10.1371/journal.pone.0307607. eCollection 2024. PLoS One. 2024. PMID: 39288160 Free PMC article.
For this purpose, this work proposes a family of generalized mixture estimators under stratified sampling to increase efficiency under symmetrical and asymmetrical distributions and study the estimator's behavior for different sample sizes for its convergence to the …
For this purpose, this work proposes a family of generalized mixture estimators under stratified sampling to increase efficiency unde …
Bias, Confounding, and Interaction: Lions and Tigers, and Bears, Oh My!
Vetter TR, Mascha EJ. Vetter TR, et al. Anesth Analg. 2017 Sep;125(3):1042-1048. doi: 10.1213/ANE.0000000000002332. Anesth Analg. 2017. PMID: 28817531 Review.
Random error in an experiment can be due to the natural, periodic fluctuation or variation in the accuracy or precision of virtually any data sampling technique or health measurement tool or scale. In a clinical research study, random error can be due to not …
Random error in an experiment can be due to the natural, periodic fluctuation or variation in the accuracy or precision of virtually …
Blocked randomization with randomly selected block sizes.
Efird J. Efird J. Int J Environ Res Public Health. 2011 Jan;8(1):15-20. doi: 10.3390/ijerph8010015. Epub 2010 Dec 23. Int J Environ Res Public Health. 2011. PMID: 21318011 Free PMC article.
Selection and accidental bias may occur when participants are not assigned to study groups with equal probability. A simple random allocation scheme is a process by which each participant has equal likelihood of being assigned to treatment versus referent groups. .. …
Selection and accidental bias may occur when participants are not assigned to study groups with equal probability. A simple random …
Sampling the difficult-to-sample.
Lepkowski JM. Lepkowski JM. J Nutr. 1991 Mar;121(3):416-23. doi: 10.1093/jn/121.3.416. J Nutr. 1991. PMID: 2002412
The cost of data collection alone may prohibit consideration of probability sampling methods, but caution is urged before abandoning this statistically sound approach to sample selection. Considerations for sampling the difficult-to-sample are illustra …
The cost of data collection alone may prohibit consideration of probability sampling methods, but caution is urged before abandoning …
Tracking random walks.
Gallotti R, Louf R, Luck JM, Barthelemy M. Gallotti R, et al. J R Soc Interface. 2018 Feb;15(139):20170776. doi: 10.1098/rsif.2017.0776. J R Soc Interface. 2018. PMID: 29436509 Free PMC article.
In empirical studies, trajectories of animals or individuals are sampled in space and time. Yet, it is unclear how sampling procedures bias the recorded data. ...We first discuss the ideal case of a constant sampling interval and short-tailed distributions of …
In empirical studies, trajectories of animals or individuals are sampled in space and time. Yet, it is unclear how sampling pr …
Evidence for non-random sampling in randomised, controlled trials by Yuhji Saitoh.
Carlisle JB, Loadsman JA. Carlisle JB, et al. Anaesthesia. 2017 Jan;72(1):17-27. doi: 10.1111/anae.13650. Anaesthesia. 2017. PMID: 27988952 Free article.
A large number of randomised trials authored by Yoshitaka Fujii have been retracted, in part as a consequence of a previous analysis finding a very low probability of random sampling. ...The high probability of non-random sampling and the repeti …
A large number of randomised trials authored by Yoshitaka Fujii have been retracted, in part as a consequence of a previous analysis …
Random allocation in controlled clinical trials: a review.
Egbewale BE. Egbewale BE. J Pharm Pharm Sci. 2014;17(2):248-53. doi: 10.18433/j3sw36. J Pharm Pharm Sci. 2014. PMID: 24934553 Free article. Review.
In some circles, opinions are also divided on the strength and weaknesses of each of the random allocation strategies. This review provides an update on various random allocation techniques so as to correct existing misconceptions on this all important …
In some circles, opinions are also divided on the strength and weaknesses of each of the random allocation strategies. This re …
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