TY - JOUR
T1 - Sample size requirements for the design of reliability studies
T2 - Precision consideration
AU - Shieh, Gwowen
PY - 2014/9
Y1 - 2014/9
N2 - In multilevel modeling, the intraclass correlation coefficient based on the one-way random-effects model is routinely employed to measure the reliability or degree of resemblance among group members. To facilitate the advocated practice of reporting confidence intervals in future reliability studies, this article presents exact sample size procedures for precise interval estimation of the intraclass correlation coefficient under various allocation and cost structures. Although the suggested approaches do not admit explicit sample size formulas and require special algorithms for carrying out iterative computations, they are more accurate than the closed-form formulas constructed from large-sample approximations with respect to the expected width and assurance probability criteria. This investigation notes the deficiency of existing methods and expands the sample size methodology for the design of reliability studies that have not previously been discussed in the literature.
AB - In multilevel modeling, the intraclass correlation coefficient based on the one-way random-effects model is routinely employed to measure the reliability or degree of resemblance among group members. To facilitate the advocated practice of reporting confidence intervals in future reliability studies, this article presents exact sample size procedures for precise interval estimation of the intraclass correlation coefficient under various allocation and cost structures. Although the suggested approaches do not admit explicit sample size formulas and require special algorithms for carrying out iterative computations, they are more accurate than the closed-form formulas constructed from large-sample approximations with respect to the expected width and assurance probability criteria. This investigation notes the deficiency of existing methods and expands the sample size methodology for the design of reliability studies that have not previously been discussed in the literature.
KW - Intraclass correlation coefficient
KW - Optimal design
KW - Precision
KW - Sample size
UR - http://www.scopus.com/inward/record.url?scp=84904763969&partnerID=8YFLogxK
U2 - 10.3758/s13428-013-0415-1
DO - 10.3758/s13428-013-0415-1
M3 - Article
C2 - 24338600
AN - SCOPUS:84904763969
SN - 1554-351X
VL - 46
SP - 808
EP - 822
JO - Behavior Research Methods
JF - Behavior Research Methods
IS - 3
ER -