TY - JOUR
T1 - Sample size requirements for interval estimation of the strength of association effect sizes in multiple regression analysis
AU - Shieh, Gwowen
PY - 2013
Y1 - 2013
N2 - Background: Effect size reporting and interpreting practices have been extensively recommended in academic journals when analyzing primary outcomes of all empirical studies. Accordingly, the sample squared multiple correlation coefficient is the commonly reported strength of association index in practical applications of multiple linear regression. Method: This paper examines the sample size procedures proposed by Bonett and Wright for precise interval estimation of the squared multiple correlation coefficient. Results: The simulation results showed that their simple method for attaining the desired precision of expected width provides satisfactory results only when sample sizes are large. Moreover, the suggested sample size formula for achieving the designated assurance probability is inaccurate and problematic. Conclusions: According to these findings, their sample size procedures are not recommended.
AB - Background: Effect size reporting and interpreting practices have been extensively recommended in academic journals when analyzing primary outcomes of all empirical studies. Accordingly, the sample squared multiple correlation coefficient is the commonly reported strength of association index in practical applications of multiple linear regression. Method: This paper examines the sample size procedures proposed by Bonett and Wright for precise interval estimation of the squared multiple correlation coefficient. Results: The simulation results showed that their simple method for attaining the desired precision of expected width provides satisfactory results only when sample sizes are large. Moreover, the suggested sample size formula for achieving the designated assurance probability is inaccurate and problematic. Conclusions: According to these findings, their sample size procedures are not recommended.
KW - Assurance probability
KW - Expected width
KW - Squared multiple correlation
KW - Assurance probability
KW - Expected width
KW - Squared multiple correlation
UR - http://www.scopus.com/inward/record.url?scp=84880955056&partnerID=8YFLogxK
U2 - 10.7334/psicothema2012.221
DO - 10.7334/psicothema2012.221
M3 - Article
C2 - 23910758
AN - SCOPUS:84880955056
SN - 0214-9915
VL - 25
SP - 402
EP - 407
JO - Psicothema
JF - Psicothema
IS - 3
ER -