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Table representation of search results timeline featuring number of search results per year.
Year
Number of Results
1945
24
1946
144
1947
106
1948
90
1949
111
1950
69
1951
77
1952
21
1953
32
1954
35
1955
33
1956
27
1957
32
1958
21
1959
36
1960
63
1961
80
1962
100
1963
198
1964
297
1965
277
1966
284
1967
394
1968
379
1969
328
1970
359
1971
406
1972
389
1973
532
1974
498
1975
331
1976
241
1977
236
1978
243
1979
203
1980
184
1981
189
1982
215
1983
230
1984
251
1985
229
1986
236
1987
209
1988
233
1989
239
1990
312
1991
318
1992
344
1993
349
1994
305
1995
226
1996
258
1997
275
1998
270
1999
288
2000
351
2001
307
2002
291
2003
387
2004
455
2005
479
2006
485
2007
538
2008
516
2009
514
2010
574
2011
635
2012
676
2013
694
2014
546
2015
560
2016
477
2017
431
2018
359
2019
386
2020
291
2021
244
2022
158
2023
100
2024
49
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Page 1
Fluid intelligence: A brief history.
Kent P.
Kent P.
Appl Neuropsychol Child. 2017 Jul-Sep;6(3):193-203. doi: 10.1080/21622965.2017.1317480. Epub 2017 May 16.
Appl Neuropsychol Child. 2017.
PMID: 28506124
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The Flynn effect: a meta-analysis.
Trahan LH, Stuebing KK, Fletcher JM, Hiscock M.
Trahan LH, et al.
Psychol Bull. 2014 Sep;140(5):1332-60. doi: 10.1037/a0037173. Epub 2014 Jun 30.
Psychol Bull. 2014.
PMID: 24979188
Free PMC article.
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Adaptive Clinical Trial
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