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Psychology: Research and Review

Table 2 Period, number of years and months, and total number of EBPs described in each review

From: Evaluation parameters for evidence-based practices for people with autism spectrum disorder: a narrative review of group and single-subject design studies

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Period included in review

No. of years and months

Total number of years and monthsa

Total no. of EBPs

NAC (2009)

Jan 1957 to Sep 2009

51 y, 9 m

51 y, 9 m

11

NPDC (Odom et al., 2010)

Jan 1997 to Dec 2007

10 y

10 y

24

NPDC (Wong et al., 2014)

Jan 1990 to Dec 2011

11 y

21 y

27

NAC (2015)

Sep 2009 to Feb 2012

2 y, 5 m

54 y, 2 m

14

NCAEP (Steinbrenner et al., 2020)

Jan 2012 to Dec 2017

5 y

26 y

28

  1. a Sum of the time range covered in initial plus further reviews by each clearinghouse